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Ye W, He W, Long J, Chen P, Ding B, Dou H, Zhang X. Versatile Composite Binder with Fast Lithium-Ion Transport for LiCoO 2 Cathodes. ACS Appl Mater Interfaces 2024; 16:17401-17410. [PMID: 38537112 DOI: 10.1021/acsami.3c17008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
The low ionic conductivity of LiCoO2 limits the rate performance of the overall electrode. Here, a polymeric composite binder composed of poly(vinylidene fluoride) (PVDF) and poly(ethylene oxide) (PEO) is reported to efficiently improve the ion transport in the LiCoO2 electrode. This is where the lithium-ion transport channel constructed by oxygen atoms of PEO can afford the electrode a lithium-ion transport number (tLi+) as high as 0.70 with the optimized composite binder in a mass ratio of 1:1 (O5F5), significantly higher than that of traditional PVDF (0.44). As a result, the O5F5 binder endows the LiCoO2 electrode with an impressive capacity of 90 mAh g-1 even at 15 C, which is twice as high as the PVDF electrode. In addition, the initial Coulombic efficiency of the LiCoO2 electrode with the O5F5 binder is close to 100% and the capacity retention is 91% after 100 cycles at 1 C. This study overcomes the problem of slow ion conductivity of the LiCoO2 electrode, providing an easy method for developing high-rate cathode binders.
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Affiliation(s)
- Wenjun Ye
- Jiangsu Key Laboratory of Materials and Technologies for Energy Storage, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
| | - Wenjie He
- Jiangsu Key Laboratory of Materials and Technologies for Energy Storage, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
| | - Jiang Long
- Jiangsu Key Laboratory of Materials and Technologies for Energy Storage, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
| | - Peng Chen
- Jiangsu Key Laboratory of Materials and Technologies for Energy Storage, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
| | - Bing Ding
- Jiangsu Key Laboratory of Materials and Technologies for Energy Storage, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
| | - Hui Dou
- Jiangsu Key Laboratory of Materials and Technologies for Energy Storage, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
| | - Xiaogang Zhang
- Jiangsu Key Laboratory of Materials and Technologies for Energy Storage, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
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Lin Y, Wang J, Ren H, Ma X, Wang W, Zhao Y, Xu Z, Liu S, Wang W, Xu X, Wang B, Zhao D, Wang D, Li W, Liu F, Zhao Y, Lu J, Yan C, Ji K. Mitochondrial myopathy without extraocular muscle involvement: a unique clinicopathologic profile. J Neurol 2024; 271:864-876. [PMID: 37847292 DOI: 10.1007/s00415-023-12005-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/12/2023] [Accepted: 09/14/2023] [Indexed: 10/18/2023]
Abstract
OBJECTIVE Mitochondrial myopathy without extraocular muscles involvement (MiMy) represents a distinct form of mitochondrial disorder predominantly affecting proximal/distal or axial muscles, with its phenotypic, genotypic features, and long-term prognosis poorly understood. METHODS A cross-sectional study conducted at a national diagnostic center for mitochondrial disease involved 47 MiMy patients, from a cohort of 643 mitochondrial disease cases followed up at Qilu Hospital from January 1, 2000, to January 1, 2021. We compared the clinical, pathological, and genetic features of MiMy to progressive external ophthalmoplegia (PEO) and mitochondrial encephalomyopathy, lactic acidosis, and stroke-like episodes (MELAS) patients. RESULTS MiMy patients demonstrated a more pronounced muscle involvement syndrome, with lower 6MWT scores, higher FSS, and lower BMI compared to PEO and MELAS patients. Serum levels of creatinine kinase (CK), lactate, and growth and differentiation factor 15 (GDF15) were substantially elevated in MiMy patients. Nearly a third (31.9%) displayed signs of subclinical peripheral neuropathy, mostly axonal neuropathy. Muscle biopsies revealed that cytochrome c oxidase strong (COX-s) ragged-red fibers (RRFs) were a typical pathological feature in MiMy patients. Genetic analysis predominantly revealed mtDNA point pathogenic variants (59.6%) and less frequently single (12.8%) or multiple (4.2%) mtDNA deletions. During the follow-up, a majority (76.1%) of MiMy patients experienced stabilization or improvement after therapeutic intervention. CONCLUSIONS This study provides a comprehensive profile of MiMy through a large patient cohort, elucidating its unique clinical, genetic, and pathological features. These findings offer significant insights into the diagnostic and therapeutic management of MiMy, ultimately aiming to ameliorate patient outcomes and enhance the quality of life.
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Affiliation(s)
- Yan Lin
- Research Institute of Neuromuscular and Neurodegenerative Diseases and Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, 250012, Shandong, China
| | - Jiayin Wang
- Research Institute of Neuromuscular and Neurodegenerative Diseases and Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, 250012, Shandong, China
| | - Hong Ren
- Department of Neurology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250012, Shandong, China
| | - Xiaotian Ma
- Mitochondrial Medicine Laboratory, Qilu Hospital (Qingdao), Shandong University, Qingdao, 266035, Shandong, China
| | - Wei Wang
- Research Institute of Neuromuscular and Neurodegenerative Diseases and Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, 250012, Shandong, China
| | - Ying Zhao
- Research Institute of Neuromuscular and Neurodegenerative Diseases and Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, 250012, Shandong, China
| | - Zhihong Xu
- Research Institute of Neuromuscular and Neurodegenerative Diseases and Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, 250012, Shandong, China
| | - Shuangwu Liu
- Research Institute of Neuromuscular and Neurodegenerative Diseases and Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, 250012, Shandong, China
| | - Wenqing Wang
- Research Institute of Neuromuscular and Neurodegenerative Diseases and Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, 250012, Shandong, China
| | - Xuebi Xu
- Department of Neurology, First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang Street, Ouhai District, Wenzhou, 325000, China
| | - Bin Wang
- Research Institute of Neuromuscular and Neurodegenerative Diseases and Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, 250012, Shandong, China
| | - Dandan Zhao
- Research Institute of Neuromuscular and Neurodegenerative Diseases and Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, 250012, Shandong, China
| | - Dongdong Wang
- Research Institute of Neuromuscular and Neurodegenerative Diseases and Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, 250012, Shandong, China
| | - Wei Li
- Research Institute of Neuromuscular and Neurodegenerative Diseases and Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, 250012, Shandong, China
| | - Fuchen Liu
- Research Institute of Neuromuscular and Neurodegenerative Diseases and Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, 250012, Shandong, China
| | - Yuying Zhao
- Research Institute of Neuromuscular and Neurodegenerative Diseases and Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, 250012, Shandong, China
| | - Jianqiang Lu
- Department of Pathology and Molecular Medicine, Neuropathology Section, McMaster University, Hamilton, ON, Canada
| | - Chuanzhu Yan
- Research Institute of Neuromuscular and Neurodegenerative Diseases and Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, 250012, Shandong, China
- Mitochondrial Medicine Laboratory, Qilu Hospital (Qingdao), Shandong University, Qingdao, 266035, Shandong, China
- Brain Science Research Institute, Shandong University, Jinan, 250012, Shandong, China
| | - Kunqian Ji
- Research Institute of Neuromuscular and Neurodegenerative Diseases and Department of Neurology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 West Wenhua Road, Jinan, 250012, Shandong, China.
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Goher SS, Aly SH, Abu-Serie MM, El-Moslamy SH, Allam AA, Diab NH, Hassanein KMA, Eissa RA, Eissa NG, Elsabahy M, Kamoun EA. Electrospun Tamarindus indica-loaded antimicrobial PMMA/cellulose acetate/ PEO nanofibrous scaffolds for accelerated wound healing: In-vitro and in-vivo assessments. Int J Biol Macromol 2024; 258:128793. [PMID: 38134993 DOI: 10.1016/j.ijbiomac.2023.128793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 12/10/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023]
Abstract
In this work, Tamarindus indica (T. indica)-loaded crosslinked poly(methyl methacrylate) (PMMA)/cellulose acetate (CA)/poly(ethylene oxide) (PEO) electrospun nanofibers were designed and fabricated for wound healing applications. T. indica is a plant extract that possesses antidiabetic, antimicrobial, antioxidant, antimalarial and wound healing properties. T. indica leaves extract of different concentrations were blended with a tuned composition of a matrix comprised of PMMA (10 %), CA (2 %) and PEO (1.5 %), and were electrospun to form smooth, dense and continuous nanofibers as illustrated by SEM investigation. In vitro evaluation of T. indica-loaded nanofibers on normal human skin fibroblasts (HBF4) revealed a high compatibility and low cytotoxicity. T. indica-loaded nanofibers significantly increased the healing activity of scratched HBF4 cells, as compared to the free plant extract, and the healing activity was significantly enhanced upon increasing the plant extract concentration. Moreover, T. indica-loaded nanofibers demonstrated significant antimicrobial activity in vitro against the tested microbes. In vivo, nanofibers resulted in a superior wound healing efficiency compared to the control untreated animals. Hence, engineered nanofibers loaded with potent phytochemicals could be exploited as an effective biocompatible and eco-friendly antimicrobial biomaterials and wound healing composites.
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Affiliation(s)
- Shaimaa S Goher
- Nanotechnology Research Centre (NTRC), The British University in Egypt (BUE), Suez Desert Road, El Sherouk City, Cairo 1183, Egypt
| | - Shaza H Aly
- Department of Pharmacognosy, School of Pharmacy, Badr University in Cairo, Badr City, Cairo 11829, Egypt
| | - Marwa M Abu-Serie
- Medical Biotechnology Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg Al-Arab, Alexandria 21934, Egypt
| | - Shahira H El-Moslamy
- Bioprocess Development Department (BID), Genetic Engineering and Biotechnology Research Institute (GEBRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, Alexandria 21934, Egypt
| | - Ayat A Allam
- Department of Pharmaceutics, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt; Department of Pharmaceutics, Faculty of Pharmacy, Sphinx University, Assiut 71515, Egypt
| | - Nadeen H Diab
- Department of Pharmacognosy, Faculty of Pharmacy, Assiut university, Assiut 71526, Egypt
| | - Khaled M A Hassanein
- Pathology and Clinical Pathology Department, Faculty of Veterinary Medicine, Assiut University, Assiut 71526, Egypt
| | - Rana A Eissa
- Badr University in Cairo Research Center, Badr University in Cairo, Badr City, Cairo 11829, Egypt
| | - Noura G Eissa
- Badr University in Cairo Research Center, Badr University in Cairo, Badr City, Cairo 11829, Egypt; Department of Pharmaceutics, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
| | - Mahmoud Elsabahy
- Badr University in Cairo Research Center, Badr University in Cairo, Badr City, Cairo 11829, Egypt; Department of Chemistry, Texas A&M University, College Station, TX 77842, USA.
| | - Elbadawy A Kamoun
- Polymeric Materials Research Dep., Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications (SRTA-City), Alexandria 21934, Egypt; Biomaterials for Medical and Pharmaceutical Applications Research Group, Nanotechnology Research Center (NTRC), The British University in Egypt (BUE), Cairo 11837, Egypt.
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Tsimafeyeva K, Starykevich M, Snihirova D, Blawert C, Scharnagl N, Schuster A, Gavras S, Luthringer-Feyerabend BJC, Zheludkevich ML. Characterization and In Vitro Behavior of PEO Coated Mg Modified with Antibacterial Ag(I) and Cu(II) Complexes. Chemistry 2024:e202303012. [PMID: 38266207 DOI: 10.1002/chem.202303012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 01/18/2024] [Accepted: 01/22/2024] [Indexed: 01/26/2024]
Abstract
The use of Mg-based biomaterials with a number of their advantageous properties are overshadowed by uncontrollable metal corrosion. Moreover, the use of implants goes alongside with the threat of pathogens-associated complications. In this study, PEO coated Mg biomaterial loaded with antibacterial Ag(I) and Cu(II) complexes is produced and tested to meet both appropriate protective characteristics as well as sufficient level of antibacterial activity. To achieve a suitable level of anticorrosion protection phosphate and fluoride-phosphate electrolytes are used in the PEO process. Investigation of the surface thickness and morphology done by means of cross-section analysis and scanning electron microscopy (SEM), as well as electrochemical impedance spectroscopy (EIS) assay show precedence of the fluoride containing PEO coating and make it the material of choice for further modification with Ag(I) and Cu(II) complexes. The presence of the complexes on the PEO surface is confirmed by energy dispersive X-ray spectroscopy (EDX). X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and glow discharge optical emission spectroscopy (GDOES) are used to estimate the complexes' chemical state and depth of penetration in the coating surface. Based on the results of antibacterial assay, the modified coatings are found to be active against both Gram-positive and Gram-negative bacteria.
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Affiliation(s)
- Kseniya Tsimafeyeva
- Helmholtz-Zentrum Hereon, Instute of Surface Science, Max-Planck-Straße 1, 21502, Geesthacht, GERMANY
| | - Maksim Starykevich
- University of Aveiro, Department of Materials Engineering and Ceramic, PORTUGAL
| | - Darya Snihirova
- Helmholtz-Zentrum Hereon, Department of Electrochemistry and Big Data, GERMANY
| | - Carsten Blawert
- Helmholtz-Zentrum Hereon, Department of Functional Surfaces, GERMANY
| | - Nico Scharnagl
- Helmholtz-Zentrum Hereon, Department of Functional Surfaces, GERMANY
| | - Anke Schuster
- Helmholtz-Zentrum Hereon, Biological Characterisation, GERMANY
| | - Sarkis Gavras
- Helmholtz-Zentrum Hereon, Functional Magnesium Materials (MBF), GERMANY
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Dong P, Deng Q, Zhang Q, Chen C, Yang C. Enabling high rate capability and stability all-solid-state batteries via cationic surfactant modification of composite electrolyte. J Colloid Interface Sci 2023; 652:567-576. [PMID: 37611466 DOI: 10.1016/j.jcis.2023.08.056] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 08/04/2023] [Accepted: 08/09/2023] [Indexed: 08/25/2023]
Abstract
The garnet-type solid electrolyte Li6.4La3Zr1.4Ta0.6O12 (LLZTO) was modified with a cationic surfactant Cetyltrimethylammonium Bromide (CTAB) to improve the dispersion of LLZTO inorganic particles in Poly (ethylene oxide) (PEO) electrolyte (PEO-LLZTO@CTAB) by a liquid phase casting method. During fabrication, the cationic modifier CTAB is uniformly adsorbed on the surface of LLZTO particles, which can effectively reduce their surface energy and lead to a thin CTAB surface coating layer. This fabricated PEO-LLZTO@CTAB can avoid the aggregation of LLZTO particles in the composite solid-state electrolyte (CSSE) and improve the interfacial contact at the PEO/LLZTO interface, thus reducing the overall resistance of PEO-LLZTO@CTAB/Li half-cell and inhibiting the dendrite growth during cycling. The all-solid-state batteries (ASSBs) with LiFePO4 (LFP) as the cathode, PEO-LLZTO@CTAB as the electrolyte and Li as the anode exhibit a high initial discharge capacity of 146.6 mAh-g-1, excellent rate performance and high-capacity retention of 91.0 % after 300 cycles at 0.2 C multiplier and 60 °C within the voltage range of 2.7-4.0 V.
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Affiliation(s)
- Pengyuan Dong
- Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Qiang Deng
- Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Qimeng Zhang
- Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Changdong Chen
- Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; College of Chemistry and Environmental Engineering, Pingdingshan University, Pingdingshan 467000, China
| | - Chenghao Yang
- Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.
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Aversa R, Perrotta V, Wang C, Apicella A. Bio-Resorption Control of Magnesium Alloy AZ31 Coated with High and Low Molecular Weight Polyethylene Oxide ( PEO) Hydrogels. Gels 2023; 9:779. [PMID: 37888352 PMCID: PMC10606464 DOI: 10.3390/gels9100779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 09/20/2023] [Accepted: 09/23/2023] [Indexed: 10/28/2023] Open
Abstract
Magnesium AZ31 alloy has been chosen as bio-resorbable temporary prosthetic implants to investigate the degradation processes in a simulating body fluid (SBF) of the bare metal and the ones coated with low and high-molecular-weight PEO hydrogels. Hydrogel coatings are proposed to control the bioresorption rate of AZ31 alloy. The alloy was preliminary hydrothermally treated to form a magnesium hydroxide layer. 2 mm discs were used in bioresorption tests. Scanning electron microscopy was used to characterize the surface morphology of the hydrothermally treated and PEO-coated magnesium alloy surfaces. The variation of pH and the mass of Mg2+ ions present in the SBF corroding medium have been monitored for 15 days. Corrosion current densities (Icorr) and corrosion potentials (Ecorr) were evaluated from potentiodynamic polarisation tests on the samples exposed to the SBF solution. Kinetics of cumulative Mg ions mass released in the corroding solution have been evaluated regarding cations diffusion and mass transport parameters. The initial corrosion rates for the H- and L-Mw PEO-coated specimens were similar (0.95 ± 0.12 and 1.82 ± 0.52 mg/cm2day, respectively) and almost 4 to 5 times slower than that of the uncoated system (6.08 mg/cm2day). Results showed that the highly swollen PEO hydrogel coatings may extend into the bulk solution, protecting the coated metal and efficiently controlling the degradation rate of magnesium alloys. These findings focus more research effort on investigating such systems as tunable bioresorbable prosthetic materials providing idoneous environments to support cells and bone tissue repair.
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Affiliation(s)
- Raffaella Aversa
- Advanced Materials Lab, Department of Architecture and Industrial Design, University of Campania, Via San Lorenzo, 81031 Aversa, Italy; (R.A.); (V.P.)
| | - Valeria Perrotta
- Advanced Materials Lab, Department of Architecture and Industrial Design, University of Campania, Via San Lorenzo, 81031 Aversa, Italy; (R.A.); (V.P.)
| | - Chao Wang
- Key Laboratory of Biomechanics and Mechanobiology, Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, School of Engineering Medicine, Beihang University, No. 37, Xueyuan Road, Beijing 100083, China;
- State Key Laboratory of Virtual Reality Technology and Systems, Beihang University, No. 37, Xueyuan Road, Beijing 100083, China
| | - Antonio Apicella
- Advanced Materials Lab, Department of Architecture and Industrial Design, University of Campania, Via San Lorenzo, 81031 Aversa, Italy; (R.A.); (V.P.)
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Platen K, Langer F, Bayer R, Hollmann R, Schwenzel J, Busse M. Influence of Molecular Weight and Lithium Bis(trifluoromethanesulfonyl)imide on the Thermal Processability of Poly(ethylene oxide) for Solid-State Electrolytes. Polymers (Basel) 2023; 15:3375. [PMID: 37631431 PMCID: PMC10459147 DOI: 10.3390/polym15163375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 07/24/2023] [Accepted: 08/03/2023] [Indexed: 08/27/2023] Open
Abstract
New energy systems such as all-solid-state battery (ASSB) technology are becoming increasingly important today. Recently, researchers have been investigating the transition from the lab-scale production of ASSB components to a larger scale. Poly(ethylene oxide) (PEO) is a promising candidate for the large-scale production of polymer-based solid electrolytes (SPEs) because it offers many processing options. Hence, in this work, the thermal processing route for a PEO-Lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) SPE in the ratio of 20:1 (EO:Li) is investigated using kneading experiments. Here, we clearly show the sensitivity of PEO during thermal processing, especially for high-molecular-weight PEO (Mw = 600,000 g mol-1). LiTFSI acts as a plasticizer for low-molecular-weight PEO (Mw = 100,000 g mol-1), while it amplifies the degradation of high-molecular-weight PEO. Further, LiTFSI affects the thermal properties of PEO and its crystallinity. This leads to a higher chain mobility in the polymer matrix, which improves the flowability. In addition, the spherulite size of the produced PEO electrolytes differs from the molecular weight. This work demonstrates that low-molecular-weight PEO is more suitable for thermal processing as a solid electrolyte due to the process stability. High-molecular-weight PEO, especially, is strongly influenced by the process settings and LiTFSI.
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Affiliation(s)
- Katharina Platen
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials (IFAM), Lilienthalplatz 1, 38108 Braunschweig, Germany
| | - Frederieke Langer
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials (IFAM), Lilienthalplatz 1, 38108 Braunschweig, Germany
| | - Roland Bayer
- DDP Specialty Products Germany GmbH & Co. KG, Business Unit Pharma Solutions/Health, International Flavors & Fragrances Inc. (IFF), August-Wolff-Straße 13, 29699 Walsrode-Bomlitz, Germany
| | - Robert Hollmann
- DDP Specialty Products Germany GmbH & Co. KG, Business Unit Pharma Solutions/Health, International Flavors & Fragrances Inc. (IFF), August-Wolff-Straße 13, 29699 Walsrode-Bomlitz, Germany
| | - Julian Schwenzel
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials (IFAM), Wiener Straße 12, 28359 Bremen, Germany
| | - Matthias Busse
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials (IFAM), Wiener Straße 12, 28359 Bremen, Germany
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Peng J, Wu D, Jiang Z, Lu P, Wang Z, Ma T, Yang M, Li H, Chen L, Wu F. Stable Interface between Sulfide Solid Electrolyte and Room-Temperature Liquid Lithium Anode. ACS Nano 2023. [PMID: 37350447 DOI: 10.1021/acsnano.3c03532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/24/2023]
Abstract
Sulfide solid electrolytes (SEs) are considered to be some of the most promising SEs for commercialization due to their high ionic conductivity, good mechanical ductility, and good interfacial contact with electrodes. The Ohmic resistance of solid-state batteries assembled with sulfide SEs is significantly reduced, but the problem of high interfacial impedance due to poor interfacial chemical/electrochemical stability between sulfide SEs and the electrodes is serious. Therefore, the formation and evolution of the electrode/sulfide SE interface during battery assembly and cycling have a crucial impact on the performance of the battery, which is one of the key issues to be solved in battery commercialization. Herein, a variety of compatible interface protective layers, including PEO and β-Li3PS4/S, are obtained between sulfide SEs and ether-based room-temperature liquid lithium anodes for long-term stable cycling of >1000 h. Such a technical method for stabilizing the solid-liquid interface between a sulfide SE and an organic liquid lithium anode successfully solves the key problem of interfacial side reactions, making this battery configuration safe and stable for long-cycle operation.
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Affiliation(s)
- Jian Peng
- Tianmu Lake Institute of Advanced Energy Storage Technologies, Liyang 213300, Jiangsu, People's Republic of China
- Yangtze River Delta Physics Research Center, Liyang 213300, Jiangsu, People's Republic of China
- Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Dengxu Wu
- Tianmu Lake Institute of Advanced Energy Storage Technologies, Liyang 213300, Jiangsu, People's Republic of China
- Yangtze River Delta Physics Research Center, Liyang 213300, Jiangsu, People's Republic of China
- Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Zhiwen Jiang
- Tianmu Lake Institute of Advanced Energy Storage Technologies, Liyang 213300, Jiangsu, People's Republic of China
- Yangtze River Delta Physics Research Center, Liyang 213300, Jiangsu, People's Republic of China
| | - Pushun Lu
- Tianmu Lake Institute of Advanced Energy Storage Technologies, Liyang 213300, Jiangsu, People's Republic of China
- Yangtze River Delta Physics Research Center, Liyang 213300, Jiangsu, People's Republic of China
- Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Zhixuan Wang
- Tianmu Lake Institute of Advanced Energy Storage Technologies, Liyang 213300, Jiangsu, People's Republic of China
- Yangtze River Delta Physics Research Center, Liyang 213300, Jiangsu, People's Republic of China
| | - Tenghuan Ma
- Tianmu Lake Institute of Advanced Energy Storage Technologies, Liyang 213300, Jiangsu, People's Republic of China
- Nano Science and Technology Institute, University of Science and Technology of China, Suzhou 215123, People's Republic of China
| | - Ming Yang
- Tianmu Lake Institute of Advanced Energy Storage Technologies, Liyang 213300, Jiangsu, People's Republic of China
- Nano Science and Technology Institute, University of Science and Technology of China, Suzhou 215123, People's Republic of China
| | - Hong Li
- Tianmu Lake Institute of Advanced Energy Storage Technologies, Liyang 213300, Jiangsu, People's Republic of China
- Yangtze River Delta Physics Research Center, Liyang 213300, Jiangsu, People's Republic of China
- Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Liquan Chen
- Tianmu Lake Institute of Advanced Energy Storage Technologies, Liyang 213300, Jiangsu, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Fan Wu
- Tianmu Lake Institute of Advanced Energy Storage Technologies, Liyang 213300, Jiangsu, People's Republic of China
- Yangtze River Delta Physics Research Center, Liyang 213300, Jiangsu, People's Republic of China
- Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
- Nano Science and Technology Institute, University of Science and Technology of China, Suzhou 215123, People's Republic of China
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9
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Alrajhi AH, Ahmed NM, Halim MM, Altowyan AS, Azmi MN, Almessiere MA. Distinct Optical and Structural (Nanoyarn and Nanomat-like Structure) Characteristics of Zinc Oxide Nanofilm Derived by Using Salvia officinalis Leaves Extract Made without and with PEO Polymer. Materials (Basel) 2023; 16:4510. [PMID: 37444824 DOI: 10.3390/ma16134510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 06/03/2023] [Accepted: 06/08/2023] [Indexed: 07/15/2023]
Abstract
This paper reports the optical properties of zinc oxide nanofilm fabricated by using organic natural products from Salvia officinalis leaves (SOL) extract and discusses the effect of the nanocrystal (NC) structure (nanoyarn and nanomat-like structure) on nanofilm optical properties. The surface-active layer of the nanofilm of ZnO nanoparticles (ZnO NPs) was passivated with natural organic SOL leaves hydrothermally, then accumulated on zinc oxide nanorods (ZnO NRs). The nanofilms were fabricated (with and without PEO) on glass substrate (at 85 °C for 16 h) via chemical solution deposition (CSD). The samples were characterized by UV-vis, PL, FESEM, XRD, and TEM measurements. TEM micrographs confirmed the nucleation of ZnO NPs around 4 nm and the size distribution at 1.2 nm of ZnO QDs as an influence of the quantum confinement effect (QCE). The nanofilms fabricated with SOL surfactant (which works as a capping agent for ZnO NPs) represent distinct optoelectronic properties when compared to bulk ZnO. FESEM images of the nanofilms revealed nanoyarn and nanomat-like structures resembling morphologies. The XRD patterns of the samples exhibited the existence of ZnO nanocrystallites (ZnO NCs) with (100), (002), and (101) growth planes. The nanofilms fabricated represented a distinct optical property through absorption and broad emission, as the optical energy band gap reduced as the nanofilms annealed (at 120 ℃). Based on the obtained results, it was established that phytochemicals extracted from organic natural SOL leaves have a distinct influence on zoic oxide nanofilm fabrication, which may be useful for visible light spectrum trapping. The nanofilms can be used in photovoltaic solar cell applications.
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Affiliation(s)
- Adnan H Alrajhi
- School of Physics, Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Naser M Ahmed
- School of Physics, Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Mohd Mahadi Halim
- School of Physics, Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Abeer S Altowyan
- Department of Physics, College of Science, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Mohamad Nurul Azmi
- School of Chemical Sciences, Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Munirah A Almessiere
- Department of Biophysics, Institute for Research & Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
- Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
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10
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Ali W, Li M, Tillmann L, Mayer T, González C, LLorca J, Kopp A. Bioabsorbable WE43 Mg alloy wires modified by continuous plasma-electrolytic oxidation for implant applications. Part I: Processing, microstructure and mechanical properties. Biomater Adv 2023; 146:213314. [PMID: 36746045 DOI: 10.1016/j.bioadv.2023.213314] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 01/13/2023] [Accepted: 01/21/2023] [Indexed: 01/27/2023]
Abstract
In our work, a novel processing strategy for the continuous fabrication and surface modification of wires from Magnesium alloy WE43 by means of plasma-electrolytic oxidation (PEO) is presented. In the first step, wires with a strong basal texture and small grain size (≈ 1 μm) were manufactured by combined cold drawing and in-line stress-relief heat treatment steps that optimized the mechanical properties (in terms of strength and ductility) by means of annealing. In a second step, and to the best of our knowledge for the first time ever, the wires were continuously surface-modified with a novel plasma electrolytic oxidation process, which was able to create a homogeneous porous oxide layer made of MgO and Mg3(PO4)2 on the wire surface. While the oxide layer slightly diminished the tensile properties, the strength of the surface-modified wires could be maintained close to 300 MPa with a strain-to-failure ≈ 8 %. Furthermore, the thickness of the oxide layer could be controlled by immersion time within the electrolytic bath and was adjusted to realize a thicknesses of ≈ 8 μm, which could be obtained in <20 s. Our experiments showed that the chemical composition, morphology and porosity of the oxide layer could be tailored by changing electrical parameters. The combined cold drawing and heat treatment process with additional continuous plasma electrolytic oxidation processing can be upscaled to produce a novel generation of bioabsorbable Mg wires with optimized mechanical, degradation and biological performance for use in biomedical applications.
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Affiliation(s)
- Wahaaj Ali
- IMDEA Materials Institute, C/Eric Kandel 2, 28906 Getafe, Madrid, Spain; Department of Material Science and Engineering, Universidad Carlos III de Madrid, Leganés, Madrid 28911, Spain; Meotec GmbH, Philipsstr. 8, 52068 Aachen, Germany
| | - Muzi Li
- IMDEA Materials Institute, C/Eric Kandel 2, 28906 Getafe, Madrid, Spain
| | | | - Tim Mayer
- Meotec GmbH, Philipsstr. 8, 52068 Aachen, Germany
| | - Carlos González
- IMDEA Materials Institute, C/Eric Kandel 2, 28906 Getafe, Madrid, Spain; Department of Materials Science, Polytechnic University of Madrid/Universidad Politécnica de Madrid, 28040 Madrid, Spain
| | - Javier LLorca
- IMDEA Materials Institute, C/Eric Kandel 2, 28906 Getafe, Madrid, Spain; Department of Materials Science, Polytechnic University of Madrid/Universidad Politécnica de Madrid, 28040 Madrid, Spain.
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Silvestro M, Orologio I, Trojsi F, Tessitore A, Tedeschi G, Russo A. Effectiveness and safety of CGRP monoclonal antibodies in migraine related to mitochondrial diseases in patients with NARP and PEO syndromes. Clin Neurol Neurosurg 2023; 226:107611. [PMID: 36753861 DOI: 10.1016/j.clineuro.2023.107611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 12/14/2022] [Accepted: 01/19/2023] [Indexed: 01/28/2023]
Affiliation(s)
- Marcello Silvestro
- Headache Center, Department of Advanced Medical and Surgical Sciences, University of Campania "Luigi Vanvitelli", Italy
| | - Ilaria Orologio
- Headache Center, Department of Advanced Medical and Surgical Sciences, University of Campania "Luigi Vanvitelli", Italy
| | - Francesca Trojsi
- Headache Center, Department of Advanced Medical and Surgical Sciences, University of Campania "Luigi Vanvitelli", Italy
| | - Alessandro Tessitore
- Headache Center, Department of Advanced Medical and Surgical Sciences, University of Campania "Luigi Vanvitelli", Italy
| | - Gioacchino Tedeschi
- Headache Center, Department of Advanced Medical and Surgical Sciences, University of Campania "Luigi Vanvitelli", Italy
| | - Antonio Russo
- Headache Center, Department of Advanced Medical and Surgical Sciences, University of Campania "Luigi Vanvitelli", Italy.
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12
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Kopp A, Fischer H, Soares AP, Schmidt-Bleek K, Leber C, Kreiker H, Duda G, Kröger N, van Gaalen K, Hanken H, Jung O, Smeets R, Heiland M, Rendenbach C. Long-term in vivo observations show biocompatibility and performance of ZX00 magnesium screws surface-modified by plasma-electrolytic oxidation in Göttingen miniature pigs. Acta Biomater 2023; 157:720-733. [PMID: 36460289 DOI: 10.1016/j.actbio.2022.11.052] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 11/23/2022] [Accepted: 11/24/2022] [Indexed: 12/02/2022]
Abstract
Bioabsorbable magnesium implants for orthopedic fixation of bone have recently become available for different fields of indication. While general questions of biocompatibility have been answered, tailoring suitable degradation kinetics for specific applications as well as long-term tissue integration remain the focus of current research. The aim of this study was the evaluation of the long-term degradation behavior and osseointegration of Mg-Ca-Zn (ZX00MEO) based magnesium implants with plasma-electrolytic oxidation (PEO) surface modification (ZX00MEO-PEO) in comparison to non-surface modified implants in vivo and in vitro. Besides a general evaluation of the biological performance of the alloy over a prolonged period, the main hypothesis was that PEO surface modification significantly reduces implant degradation rate and improves tissue interaction. In vitro, the microstructure and surface of the bioabsorbable screws were characterized by SEM/EDS, cytocompatibility and degradation testing facilitating hydrogen gas evolution, carried out following ISO 10993-5/-12 and ASTM F3268-18a/ASTM G1-03 (E1:2017). In vivo, screws were implanted in the frontal bone of Minipigs for 6, 12, and 18 months, following radiological and histomorphometric analysis. A slower and more uniform degradation and improved cytocompatibility could be shown for the ZX00MEO-PEO group in vitro. A significant reduction of degradation rate and enhanced bone formation around the ZX00MEO-PEO screws in vivo was confirmed. Proficient biocompatibility and tissue integration could generally be shown in vivo regardless of surface state. The tested magnesium alloy shows generally beneficial properties as an implant material, while PEO-surface modification further improves the bioabsorption behavior both in vitro and in vivo. STATEMENT OF SIGNIFICANCE: Devices from bioabsorbable Magnesium have recently been introduced to orthopedic applications. However, the vast degradation of Magnesium within the human body still gives limitations. While reliable in-vivo data on most promising surface treatments such as Plasma-electrolytic-Oxidation is generally scarce, long-time results in large animals are to this date completely missing. To overcome this lack of evidence, we studied a Magnesium-Calzium-Zinc-alloy with surface enhancement by PEO for the first time ever over a period of 18 months in a large animal model. In-vitro, surface-modified screws showed significantly improved cytocompatibility and reduction of degradation confirmed by hydrogen gas evolution testing, while in-vivo radiological and histological evaluation generally showed good biocompatibility and bioabsorption as well as significantly enhanced reduction of degradation and faster bone regeneration in the PEO-surface-modified group.
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Affiliation(s)
| | - Heilwig Fischer
- Department of Oral and Maxillofacial Surgery, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Augustenburger Platz 1, Berlin 13353, Germany; Berlin Institute of Health (BIH), Anna-Louisa-Karsch-Straße 2, Berlin 10178, Germany; Julius Wolff Institute and Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Augustenburger Platz 1, Berlin 13353, Germany
| | - Ana Prates Soares
- Department of Oral and Maxillofacial Surgery, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Augustenburger Platz 1, Berlin 13353, Germany; Julius Wolff Institute and Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Augustenburger Platz 1, Berlin 13353, Germany
| | - Katharina Schmidt-Bleek
- Julius Wolff Institute and Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Augustenburger Platz 1, Berlin 13353, Germany
| | - Christoph Leber
- Department of Oral and Maxillofacial Surgery, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Augustenburger Platz 1, Berlin 13353, Germany
| | - Henri Kreiker
- Department of Oral and Maxillofacial Surgery, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Augustenburger Platz 1, Berlin 13353, Germany
| | - Georg Duda
- Julius Wolff Institute and Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Augustenburger Platz 1, Berlin 13353, Germany
| | - Nadja Kröger
- Department of Plastic, Reconstructive and Aesthetic Surgery, Faculty of Medicine and University Hospital Cologne, University of Cologne, Kerpener Str. 62, Cologne 50937, Germany
| | | | - Henning Hanken
- Department of Oral and Maxillofacial Surgery, Asklepios Hospital North, Faculty of Medicine, Semmelweis University Campus Hamburg, Hamburg 20099, Germany; Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Martinistraße 52, Hamburg 20246, Germany
| | - Ole Jung
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, Rostock 18057, Germany
| | - Ralf Smeets
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Martinistraße 52, Hamburg 20246, Germany
| | - Max Heiland
- Department of Oral and Maxillofacial Surgery, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Augustenburger Platz 1, Berlin 13353, Germany
| | - Carsten Rendenbach
- Department of Oral and Maxillofacial Surgery, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Augustenburger Platz 1, Berlin 13353, Germany
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Samadi P, Binczarski MJ, Maniukiewicz W, Pawlaczyk A, Rogowski J, Szubiakiewicz E, Szynkowska-Jozwik MI, Witonska IA. Zn Modification of Pd/TiO 2/Ti Catalyst for CO Oxidation. Materials (Basel) 2023; 16:1216. [PMID: 36770219 PMCID: PMC9921276 DOI: 10.3390/ma16031216] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/22/2023] [Accepted: 01/28/2023] [Indexed: 06/18/2023]
Abstract
The main goal of this study was to modify the activity of Pd/TiO2/Ti catalyst in the reaction of CO oxidation by the addition of Zn. Plasma electrolytic oxidation (PEO) of Ti wire was conducted to produce a uniform porous layer of TiO2. A mixture of Pd and Zn was then introduced by means of adsorption. After reduction treatment, the activity of the samples was examined by oxidation of 5% CO in a temperature range from 80-350 °C. Model catalysts with sufficient amounts of the metals for physico-chemical investigation were prepared to further investigate the reaction between Pd and Zn during CO oxidation. The structures and compositions of the samples were investigated using scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS), time-of-flight secondary ion mass spectrometry (TOF-SIMS), inductively coupled plasma mass spectrometry (ICP-MS), Fourier transform infrared (FTIR), and X-ray diffraction (XRD). Modification of Pd/TiO2/Ti catalyst by Zn with a Pd:Zn atomic ratio of 2:1 decreased the temperature of complete CO oxidation from 220 °C for Pd/TiO2/Ti to 180 °C for Pd-Zn/TiO2/Ti. The temperature of 50% CO conversion on Pd-Zn(2:1)/TiO2/Ti was around 55 °C lower than in the reaction on monometallic Pd catalyst. The addition of Zn to the Pd catalyst lowered the binding energy of CO on the surface and improved the dissociative adsorption of oxygen, facilitating the oxidation of CO. FTIR showed that the bridging form of adsorbed CO is preferred on bimetallic systems. Analysis of the surface compositions of the samples (SEM-EDS, TOF-SIMS) showed higher amounts of oxygen on the bimetallic systems.
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Alhagri IA, Qahtan TF, Farea MO, Al-Hakimi AN, Al-Hazmy SM, Saeed SES, Albadri AEAE. Enhanced Structural, Optical Properties and Antibacterial Activity of PEO/CMC Doped TiO 2 NPs for Food Packaging Applications. Polymers (Basel) 2023; 15:polym15020384. [PMID: 36679265 PMCID: PMC9866148 DOI: 10.3390/polym15020384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/27/2022] [Accepted: 01/06/2023] [Indexed: 01/13/2023] Open
Abstract
In this article, the synthesis, optical, and electrical properties of composites consisting of polyethylene oxide (PEO), carboxymethyl cellulose (CMC), and titanium dioxide nanoparticles are examined. Flexible nanocomposite samples comprising PEO, CMC, and TiO2 nanoparticles were produced swiftly via using the cast synthesis method. In addition, XRD and FT-IR analysis were performed in order to analyze the structures of the prepared samples. Our results demonstrate the PEO/CMC blend's effectiveness in interacting with TiO2 nanoparticles. The optical properties of the PEO/CMC and nanocomposite samples, such as the energy band gap, were studied using the UV/Vis optical absorbance. It was found that as TiO2 NP weight fraction increases, the energy gap narrows. Moreover, TiO2 nanoparticles with an average size of 16 nm were formed in spherical and rod shapes, according to a TEM image. The SEM images demonstrate how the distribution of TiO2 NPs increased upon the surfaces of the prepared films. The antibacterial activity in the nanocomposites was shown to be enhanced by the TiO2 NP concentrations. Finally, we proposed that PEO/CMC-0.8 wt. % TiO2 nanocomposites with enhanced optical, electrical, and dielectric properties should be used in electrochemical devices.
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Affiliation(s)
- Ibrahim A. Alhagri
- Department of Chemistry, College of Sciences, Qassim University, Buraidah 51452, Saudi Arabia
- Department of Chemistry, Faculty of Sciences, Ibb University, Ibb 70270, Yemen
- Correspondence:
| | - Talal F. Qahtan
- Physics Department, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Mohammed O. Farea
- Physics Department, Faculty of Science, Ibb University, Ibb 70270, Yemen
| | - Ahmed N. Al-Hakimi
- Department of Chemistry, College of Sciences, Qassim University, Buraidah 51452, Saudi Arabia
- Department of Chemistry, Faculty of Sciences, Ibb University, Ibb 70270, Yemen
| | - Sadeq M. Al-Hazmy
- Department of Chemistry, College of Sciences, Qassim University, Buraidah 51452, Saudi Arabia
| | - Saeed El-Sayed Saeed
- Department of Chemistry, College of Sciences, Qassim University, Buraidah 51452, Saudi Arabia
| | - Abuzar EAE Albadri
- Department of Chemistry, College of Sciences, Qassim University, Buraidah 51452, Saudi Arabia
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Yasui T, Hayashi K, Fukumoto M. Behaviors of Micro-Arcs, Bubbles, and Coating Growth during Plasma Electrolytic Oxidation of β-Titanium Alloy. Materials (Basel) 2022; 16:ma16010360. [PMID: 36614699 PMCID: PMC9822483 DOI: 10.3390/ma16010360] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 12/26/2022] [Accepted: 12/27/2022] [Indexed: 06/12/2023]
Abstract
The plasma electrolytic oxidation (PEO) of a titanium alloy, Ti-15V-3Cr-3Sn-3Al, was performed to develop mechanical applications by improving the tribological characteristics. The behaviors of micro-arcs, bubbles, and coating growth during the PEO process were investigated under three different operating conditions, constant voltage (CV) operation, constant current operation (CC), and short treatment time (ST) operation, to control the surface structure and function by the PEO process. A low friction coefficient was achieved by CV operation at 500 V and by CC operation at 3.0 kA/m2. The maximum coating thickness of 6.88 μm was achieved by CV operation at 500 V and 60 s. From the observation of micro-arcs, bubbles, and discharge craters by ST operation, the minimum discharge diameter of the micro-arc was 8 μm, and the discharge craters had a discharge pore size of 0.3 μm in diameter in the center with a petal-shaped burr around the discharge pore. During the PEO process, no bubble bursts around the micro-arcs and no backfilling of the discharge pores by the ejected materials were observed. Thus, the discharge pores remain a porous structure in the PEO coating for Ti. The utilization efficiency of the total charge density by CV operation above 300 V was lower than that by the conventional anodization process. The utilization efficiency of total charge density by CC operation was higher than that by the conventional anodization process.
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Ward SP, Mcdermott ST, Heichel D, Burke KA, Adamson DH. Solvent-Free Direct PEGylation of Collagen Fibers. ACS Biomater Sci Eng 2022; 8:5101-5109. [PMID: 36374748 DOI: 10.1021/acsbiomaterials.2c01071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The addition of poly(ethylene glycol) (PEG) to biomolecules and biomaterials is a well-established approach to modify their properties for therapeutic applications. For biomaterials, the approach is typically to blend or electrospray the synthetic polymer with the biomaterial. Effective surface modification approaches such as surface-initiated polymer brushes are challenging since the harsh solvents required for brush synthesis may destroy the biomaterial. Herein, we describe the PEGylation of collagen fibers by surface-initiated PEG brushes using a living anionic grafting-from mechanism. This brush synthesis is done in the absence of solvents to minimize the degradation of the native collagen structure. We quantify the effect the brush synthesis has on the native structure of the collagen fiber using differential scanning calorimetry (DSC) and find that even at long reaction times a significant fraction of the native structure remains. Dynamic mechanical analysis indicates the collagen undergoes only modest structural degradation, while adhesion studies find a significant improvement of antifouling properties. Further, our approach opens the way for further chemistry, as the growing polymer chain is a potassium alkoxy group that can be functionalized by termination or by subsequent reaction by a wide variety of molecules.
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Affiliation(s)
- Shawn P Ward
- Department of Chemistry, University of Connecticut, Storrs, Connecticut06269, United States
| | - Sean T Mcdermott
- Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, Connecticut06269, United States
| | - Danielle Heichel
- Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, Connecticut06269, United States
| | - Kelly A Burke
- Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, Connecticut06269, United States.,Chemical and Biomolecular Engineering, University of Connecticut, Storrs, Connecticut06269, United States
| | - Douglas H Adamson
- Department of Chemistry, University of Connecticut, Storrs, Connecticut06269, United States.,Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, Connecticut06269, United States
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Fattah-alhosseini A, Chaharmahali R, Rajabi A, Babaei K, Kaseem M. Performance of PEO/Polymer Coatings on the Biodegradability, Antibacterial Effect and Biocompatibility of Mg-Based Materials. J Funct Biomater 2022; 13:jfb13040267. [PMID: 36547527 PMCID: PMC9781375 DOI: 10.3390/jfb13040267] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 11/19/2022] [Accepted: 11/26/2022] [Indexed: 12/03/2022] Open
Abstract
Magnesium (Mg) alloys have recently attracted attention in biomedicine as biodegradable materials with non-toxic degradable products. Such compounds have become a frontier in the study of biodegradable materials because of their remarkable biomechanical compatibility and superior biocompatibility. The use of Mg-based implants reduces the negative consequences of permanent biological implants by eliminating the necessity for biomaterial surgery following the healing process. However, the quick deterioration, formation of considerable gas of hydrogen volumes and a rise in the body environment pH are obstacles in the application of Mg as an implant material. Hence, compelling advances for erosion resistance and biocompatibility of magnesium and its alloys are noteworthy. Surface modification may be a practical approach because it improves the erosion resistance compared with extensive preparation of a treated surface for progressed bone recovery and cell attachment. Coating produced by plasma electrolytic oxidation (PEO) seems a compelling method in order to enhance magnesium and the properties of its alloys. PEO-formed coatings cannot provide long-term protection in the physiological environment due to their porous nature. Thus, a polymer coating is applied on the porous PEO-formed coating, which is steadily applied on the surface. Polymer coatings improve the biocompatibility properties of Mg and its alloys and increase corrosion resistance. In this article, the most recent advancements in PEO/polymer composite coatings are reviewed, and the biocompatibility of such coatings is examined.
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Affiliation(s)
- Arash Fattah-alhosseini
- Department of Materials Engineering, Bu-Ali Sina University, Hamedan 65178-38695, Iran
- Correspondence: (A.F.-a.); (M.K.)
| | - Razieh Chaharmahali
- Department of Materials Engineering, Bu-Ali Sina University, Hamedan 65178-38695, Iran
| | - Armin Rajabi
- Department of Mechanical and Manufacturing Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia
| | - Kazem Babaei
- Department of Materials Engineering, Bu-Ali Sina University, Hamedan 65178-38695, Iran
| | - Mosab Kaseem
- Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Republic of Korea
- Correspondence: (A.F.-a.); (M.K.)
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Chavda D, Joshi D, Thakkar V, Gandhi T. Fabrication and In Vitro Evaluation of Febuxostat Tablet for Obtaining Biphasic Drug Release Profile. Recent Adv Drug Deliv Formul 2022; 16:RADDF-EPUB-127615. [PMID: 36397626 DOI: 10.2174/2667387817666221116100127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 08/26/2022] [Accepted: 09/21/2022] [Indexed: 11/21/2022]
Abstract
Aim and Objective The primary aim of the present investigation was to adopt the concept of quality by design (QbD) for developing Febuxostat matrix tablets containing a novel combination of polyethylene oxide (PEO), pre-gelatinized starch (PGS) and lactose for obtaining biphasic drug release. Experimental work Febuxostat-containing matrix tablets were prepared by direct compression using 32 full factorial designs. The tablets were prepared with varying amounts of PEO WSR 301 to PGS and lactose to obtain the desired release pattern. The chosen responses were cumulative % drug released at 1, 6 and 12 hours. The evaluation of tablets was done for pre and post-compressional parameters. Compared with the marketed tablet, the optimized formulations were selected based on in vitro drug release. Dose dumping was checked in the dissolution medium containing up to 40% alcohol. Result and discussion The results of the dissolution study indicated that the batch containing a 1:1 ratio of PEO WSR 301 and PGS (15 mg each) and 20 mg of Lactose showed fast initial drug release to imitate the pharmacological action followed by sustained drug release effect. The use of Lactose facilitated immediate drug release, while PEO WSR 301 and PGS exhibited the opposite effect on cumulative drug release. The results of the 32 Factorial design revealed that the concentration of Lactose is a critical parameter. Dose dumping was not observed in the alcoholic dissolution medium. Kinetic equations were fitted to the dissolution data after 1 hour of the dissolution study. Conclusion The type (soluble or swellable) and the concentration of excipients (low or high) dictate the tablets' drug release. The study's outcome revealed that the most critical material attribute is the amount of lactose. The novel combination of PEO, PGS and lactose can bypass existing patents and give more industrial applicability.
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Affiliation(s)
- Dipika Chavda
- Department of Pharmaceutics, Anand Pharmacy College, Opp. Town Hall, SRKSM campus, Anand-388001, Gujarat, India
| | - Deepika Joshi
- Department of Pharmaceutics, Anand Pharmacy College, Opp. Town Hall, SRKSM campus, Anand-388001, Gujarat, India
| | - Vaishali Thakkar
- Department of Pharmaceutics, Anand Pharmacy College, Opp. Town Hall, SRKSM campus, Anand-388001, Gujarat, India
| | - Tejal Gandhi
- Department of Pharmacology, Anand Pharmacy College, Opp. Town Hall, SRKSM campus Anand-388001, Gujarat, India
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Ni'mah YL, Saputra MAE, Suprapto S, Fansuri H, Suwarta P, Subhan A, Pradanawati SA. The Fabrication of Solid Polymer Electrolyte from CS/ PEO/NaClO(4)/Fly Ash Composite. Polymers (Basel) 2022; 14. [PMID: 36432918 DOI: 10.3390/polym14224792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 10/28/2022] [Accepted: 11/02/2022] [Indexed: 11/09/2022] Open
Abstract
Solid polymer electrolytes (SPEs) have been successfully fabricated from CS/PEO/NaClO4/Fly ash composite. Chitosan (CS), an organic polymer, was blended with polyethylene oxide (PEO) to enhance its electrochemical properties. However, SPEs based on CS/PEO composites have low conductivity. Fly ash (FA) has been studied to be used as a filler to increase the ionic conductivity of SPEs. In this study, polymer composites based on CS and PEO were developed with the addition of FA as a filler using the solution casting method. The interactions between CS, PEO, NaClO4, and fly ash were observed using FTIR. The SPE characterization using XRD and DSC showed a decrease in crystallinity after the addition of NaClO4 and FA. The SPE composite morphology and elemental distribution were investigated using SEM. SPE conductivity analysis using EIS showed the optimum results for SPE fabricated with a ratio of CS:PEO:NaClO4 = 3:2:7.5, which was 1.02 × 10-4 S cm-1 at 30 °C and increased to 2.13 × 10-3 S cm-1 at 60 °C. The addition of FA (5 wt.%) increased the conductivity to 3.20 × 10-4 S cm-1 at 30 °C and increased to 4.34 × 10-3 S cm-1 at 60 °C.
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20
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Arya RK, Gupta AK. The effect of nitrogen-rich ionic liquid [EMIMDCA] on the electronic structure of solid polymer electrolyte ( PEO-LiTFSI). J Mol Model 2022; 28:363. [PMID: 36242654 DOI: 10.1007/s00894-022-05353-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 10/06/2022] [Indexed: 10/17/2022]
Abstract
In our work, the ab-initio methods based on density functional theory (DFT) formalism are used to investigate the effect of nitrogen-rich ionic liquid (EMIMDCA; 1-ethyl-3-methylimidazolium dicyanamide) on the electronic structure of SPE (solid polymer electrolyte) (PEO-LiTFSI) electrolyte with B3LYP method and LANL2DZ basis set. The differences in energy levels of highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO), i.e., energy gap ([Formula: see text]) of the PEO, [EMIMDCA], SPE, and ionogel (IG), are found 5.74, 6.59, 3.25, and 2.80 eV, respectively. In SPE, the reduced band gap ([Formula: see text]) is due to the transportation of cation of LiTFSI (Li+ ion). Finally, the reduced band gap of IG confirms that IL enhances the transportation of cation of LiTFSI (Li+ ion) through the oxygen atom of PEO. The global and local chemical descriptors and electrochemical stability windows (ESWs) are calculated using the HOMO-LUMO energy levels. Partial charge analysis is studied by Mulliken population analysis and molecular electrostatic potential surface.
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21
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Calori IR, Pinheiro L, Braga G, de Morais FAP, Caetano W, Tedesco AC, Hioka N. Interaction of triblock copolymers (Pluronic®) with DMPC vesicles: a photophysical and computational study. Spectrochim Acta A Mol Biomol Spectrosc 2022; 275:121178. [PMID: 35366523 DOI: 10.1016/j.saa.2022.121178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 03/10/2022] [Accepted: 03/17/2022] [Indexed: 06/14/2023]
Abstract
Pluronic/lipid mix promises stealth liposomes with long circulation time and long-term stability for pharmaceutical applications. However, the influence of Pluronics on several aspects of lipid membranes has not been fully elucidated. Herein it was described the effect of Pluronics on the structured water, alkyl chain conformation, and kinetic stability of dimyristoylphosphatidylcholine (DMPC) liposomes using interfacial and deeper fluorescent probes along with computational molecular modeling data. Interfacial water changed as a function of Pluronics' hydrophobicity with polypropylene oxide (PPO) anchoring the copolymers in the lipid bilayer. Pluronics with more than 30-40 PO units had facilitated penetration at the bilayer while shorter PPO favored a more interfacial interaction. Low Pluronic concentrations provided long-term stability of vesicles by steric effects of polyethylene oxide (PEO), but high amounts destabilized the vesicles as a sum of water-bridge cleavage at the polar head group and the reduced alkyl-alkyl interactions among the lipids. The high kinetic stability of Pluronic/DMPC vesicles is a proof-of-concept of its advantages and applicability in nanotechnology over conventional liposome-based pharmaceutical products for future biomedical applications.
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Affiliation(s)
- Italo Rodrigo Calori
- Department of Chemistry, Center of Nanotechnology and Tissue Engineering, Photobiology and Photomedicine Research Group, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo 14040-901, Brazil
| | - Lukas Pinheiro
- Department of Chemistry, Research Nucleus of Photodynamic Therapy, State University of Maringá, Av. Colombo 5790, Maringá, Paraná 97020-900, Brazil
| | - Gustavo Braga
- Department of Chemistry, Research Nucleus of Photodynamic Therapy, State University of Maringá, Av. Colombo 5790, Maringá, Paraná 97020-900, Brazil
| | - Flávia Amanda Pedroso de Morais
- Department of Chemistry, Research Nucleus of Photodynamic Therapy, State University of Maringá, Av. Colombo 5790, Maringá, Paraná 97020-900, Brazil
| | - Wilker Caetano
- Department of Chemistry, Research Nucleus of Photodynamic Therapy, State University of Maringá, Av. Colombo 5790, Maringá, Paraná 97020-900, Brazil
| | - Antonio Claudio Tedesco
- Department of Chemistry, Center of Nanotechnology and Tissue Engineering, Photobiology and Photomedicine Research Group, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo 14040-901, Brazil.
| | - Noboru Hioka
- Department of Chemistry, Research Nucleus of Photodynamic Therapy, State University of Maringá, Av. Colombo 5790, Maringá, Paraná 97020-900, Brazil
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22
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López-Ortega A, Sáenz de Viteri V, Alves SA, Mendoza G, Fuentes E, Mitran V, Cimpean A, Dan I, Vela A, Bayón R. Multifunctional TiO 2 coatings developed by plasma electrolytic oxidation technique on a Ti20Nb20Zr4Ta alloy for dental applications. Biomater Adv 2022; 138:212875. [PMID: 35913254 DOI: 10.1016/j.bioadv.2022.212875] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 05/13/2022] [Accepted: 05/16/2022] [Indexed: 06/15/2023]
Abstract
A newly developed β-Ti alloy based on the Ti-Nb-Zr-Ta system (Ti20Nb20Zr4Ta) has been subjected to Plasma Electrolytic Oxidation (PEO) treatment to obtain a multifunctional ceramic-like (TiO2) coating with superior tribocorrosion (wear and corrosion) resistance and improved biocompatibility. For this aim, elements such as Ca, P, and Ag NPs have been incorporated into the oxide film to obtain bioactive and biocide properties. The chemical composition and morphology of the TiO2-PEO coating was characterized, and its multifunctionality was addressed by several means, including antibacterial activity assessment, formation of bone-like apatite, metallic ion release evaluation, in vitro cellular response analysis, and corrosion and tribocorrosion tests in artificial saliva. The developed coatings enhanced the corrosion and tribocorrosion resistance of the bare alloy and exhibited antibacterial ability with low cytotoxicity and negligible ion release. Furthermore, they were able to sustain MC3T3-E1 preosteoblast viability/proliferation and osteogenic differentiation. Altogether, the results obtained demonstrate the potential of the TiO2 coating incorporating Ca, P, and Ag NPs to be used for dental applications.
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Affiliation(s)
- A López-Ortega
- Tekniker, Basque Research and Technology Aliance (BRTA), Eibar, Spain.
| | | | - S A Alves
- Tekniker, Basque Research and Technology Aliance (BRTA), Eibar, Spain
| | - G Mendoza
- Tekniker, Basque Research and Technology Aliance (BRTA), Eibar, Spain
| | - E Fuentes
- Tekniker, Basque Research and Technology Aliance (BRTA), Eibar, Spain
| | - V Mitran
- University of Bucharest, Department of Biochemistry and Molecular Biology, Bucharest, Romania
| | - A Cimpean
- University of Bucharest, Department of Biochemistry and Molecular Biology, Bucharest, Romania
| | - I Dan
- R&D Consulting and Services SRL, Bucharest, Romania
| | - A Vela
- Mugape S.L., Mallabia, Spain
| | - R Bayón
- Tekniker, Basque Research and Technology Aliance (BRTA), Eibar, Spain
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23
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Samadi P, Binczarski MJ, Pawlaczyk A, Rogowski J, Szynkowska-Jozwik MI, Witonska IA. CO Oxidation over Pd Catalyst Supported on Porous TiO 2 Prepared by Plasma Electrolytic Oxidation ( PEO) of a Ti Metallic Carrier. Materials (Basel) 2022; 15:4301. [PMID: 35744362 DOI: 10.3390/ma15124301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 06/08/2022] [Accepted: 06/14/2022] [Indexed: 02/06/2023]
Abstract
A porous TiO2 layer was prepared with the plasma electrolytic oxidation (PEO) of Ti. In a further step, Pd was deposited on the TiO2 surface layer using the adsorption method. The activity of the Pd/TiO2/Ti catalyst was investigated during the oxidation of CO to CO2 in a mixture of air with 5% CO. The structure of the catalytic active layer was studied using a scanning electron microscope equipped with an energy dispersive spectrometer (SEM-EDS), time-of-flight secondary ion mass spectrometry (TOF-SIMS), inductively coupled plasma mass spectrometry (ICP-MS), and X-ray diffraction (XRD). The PEO process provided a porous TiO2 layer with a uniform thickness in the range of 5-10 µm, which is desirable for the production of Pd-supported catalysts. A TOF-SIMS analysis showed the formation of Pd nanoparticles after the adsorption treatment. The conversion of CO to CO2 in all samples was achieved at 150-280 °C, depending on the concentration of Pd. The composition of Pd/ TiO2/Ti was determined using ICP-MS. The optimum concentration of Pd on the surface of the catalyst was approximately 0.14% wt. This concentration was obtained when a 0.4% PdCl2 solution was used in the adsorption process. Increasing the concentration of PdCl2 did not lead to a further improvement in the activity of Pd/ TiO2/Ti.
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24
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Zhang L, Lin Y, Peng X, Wu M, Zhao T. A High-Capacity Polyethylene Oxide-Based All-Solid-State Battery Using a Metal-Organic Framework Hosted Silicon Anode. ACS Appl Mater Interfaces 2022; 14:24798-24805. [PMID: 35603575 DOI: 10.1021/acsami.2c04487] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Polyethylene oxide (PEO)-based solid electrolytes have been widely studied in all-solid-state lithium (Li) metal batteries due to their favorable interfacial contact with electrodes, facile fabrication, and low cost, but their inferior Li dendrite suppression capability renders low actual areal capacities of Li metal anodes. Here, we develop a high-capacity all-solid-state battery using a metal-organic framework hosted silicon (Si@MOF) anode and a fiber-supported PEO/garnet composite electrolyte. Si nanoparticles are embedded in the micro-sized MOF-derived carbon host, which efficiently accommodates the repeated deformation of Si over cycles while providing sufficient charge transfer pathways. As a result, the Si@MOF anode shows excellent interfacial stability toward the composite polymer electrolyte for over 1000 h and achieves a high reversible areal capacity of 3 mAh cm-2. The full cell using the LiFePO4 (LFP) cathode is able to deliver 135 mAh g-1 initially and maintains 73.1% of the capacity after 500 cycles at 0.5 C and 60 °C. More remarkably, the full cells with high LFP loadings achieve areal capacities of more than 2 mAh cm-2, exceeding most PEO-based ASSBs using metallic Li. Finally, the pouch cell using the proposed design exhibits decent electrochemical performance and high safety.
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Affiliation(s)
- Leicheng Zhang
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Yanke Lin
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Xudong Peng
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Maochun Wu
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Tianshou Zhao
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen 518055, China
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25
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Heseltine PL, Bayram C, Gultekinoglu M, Homer-Vanniasinkam S, Ulubayram K, Edirisinghe M. Facile One-Pot Method for All Aqueous Green Formation of Biocompatible Silk Fibroin-Poly(Ethylene Oxide) Fibers for Use in Tissue Engineering. ACS Biomater Sci Eng 2022; 8:1290-1300. [PMID: 35232011 PMCID: PMC9096800 DOI: 10.1021/acsbiomaterials.1c01555] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Silk fibroin (SF) fibers are highly regarded in tissue engineering because of their outstanding biocompatibility and tunable properties. A challenge remains in overcoming the trade-off between functioning and biocompatible fibers and the use of cytotoxic, environmentally harmful organic solvents in their processing and formation. The aim of this research was to produce biocompatible SF fibers without the use of cytotoxic solvents, via pressurized gyration (PG). Aqueous SF was blended with poly(ethylene oxide) (PEO) in ratios of 80:20 (labeled SF-PEO 80:20) and 90:10 (labeled SF-PEO 90:10) and spun into fibers using PG, assisted by a range of applied pressures and heat. Pure PEO (labeled PEO-Aq) and SF solubilized in hexafluoro-isopropanol (HFIP) (labeled SF-HFIP) and aqueous SF (labeled SF-Aq) were also prepared for comparison. The resulting fibers were characterized using SEM, TGA, and FTIR. Their in vitro cell behavior was analyzed using a Live/Dead assay and cell proliferation studies with the SaOS-2 human bone osteosarcoma cell line (ATCC, HTB-85) and human fetal osteoblast cells (hFob) (ATCC, CRL-11372) in 2D culture conditions. Fibers in the micrometer range were successfully produced using SF-PEO blends, SF-HFIP, and PEO-Aq. The fiber thickness ranged from 0.71 ± 0.17 μm for fibers produced using SF-PEO 90:10 with no applied pressure to 2.10 ± 0.78 μm for fibers produced using SF-PEO 80:10 with 0.3 MPa applied pressure. FTIR confirmed the presence of SF via amide I and amide II bands in the blend fibers because of a change in structural conformation. No difference was observed in thermogravimetric properties among varying pressures and no significant difference in fiber diameters for pressures. SaOS-2 cells and hFOb cell studies demonstrated higher cell densities and greater live cells on SF-PEO blends when compared to SF-HFIP. This research demonstrates a scalable and green method of producing SF-based constructs for use in bone-tissue engineering applications.
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Affiliation(s)
- Phoebe Louiseanne Heseltine
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom
| | - Cem Bayram
- Institute of Science and Technology, Department of Nanotechnology and Nanomedicine, Hacettepe University, Ankara 06800, Turkey
| | - Merve Gultekinoglu
- Faculty of Pharmacy, Department of Basic Pharmaceutical Sciences, Hacettepe University, Ankara 06800, Turkey
| | | | - Kezban Ulubayram
- Faculty of Pharmacy, Department of Basic Pharmaceutical Sciences, Hacettepe University, Ankara 06800, Turkey
| | - Mohan Edirisinghe
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom
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Rafique M, Midgley AC, Wei T, Wang L, Kong D, Wang K. Controlling Pore Size of Electrospun Vascular Grafts by Electrospraying of Poly(Ethylene Oxide) Microparticles. Methods Mol Biol 2022; 2375:153-64. [PMID: 34591306 DOI: 10.1007/978-1-0716-1708-3_13] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Electrospinning has become a popular polymer processing technique for application in vascular tissue engineering due to its unique capability to fabricate porous vascular grafts with fibrous morphology closely mimicking the natural extracellular matrix (ECMs). However, the inherently small pore sizes of electrospun vascular grafts often inhibit cell infiltration and impede vascular regeneration. Here we describe an effective and controllable method to increase the pore size of electrospun poly(ε-caprolactone) (PCL) vascular graft. With this method, composite grafts are prepared by turning on or off electrospraying of poly(ethylene oxide) (PEO) microparticles during the process of electrospinning PCL fibers. The PEO microparticles are used as a porogen agent and can be subsequently selectively removed to create a porogenic layer within the electrospun PCL grafts. Three types of porogenic PCL grafts were constructed using this method. The porogenic layer was either the inner layer, the middle one, or the outer one.
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Ni’mah YL, Muhaiminah ZH, Suprapto S. Increase of Solid Polymer Electrolyte Ionic Conductivity Using Nano-SiO 2 Synthesized from Sugarcane Bagasse as Filler. Polymers (Basel) 2021; 13:polym13234240. [PMID: 34883743 PMCID: PMC8659504 DOI: 10.3390/polym13234240] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 11/19/2021] [Accepted: 11/24/2021] [Indexed: 11/16/2022] Open
Abstract
The synthesize of solid polymer electrolyte (SPE) based on polyethylene oxide (PEO), NaClO4 and nano-SiO2 was carried out by solution cast technique. Nano-SiO2 was synthesized from sugarcane bagasse using sol-gel method. FTIR analysis was carried out to investigate the bonding between nano-SiO2 and PEO/NaClO4. The morphology of the SPE was characterized using SEM. XRD and DSC analysis showed that SPE crystallinity decreased as nano-SiO2 concentration was increased. Mechanical analyses were conducted to characterize the SPE tensile strength and elongation at break. EIS analysis was conducted to measure SPE ionic conductivity. The PEO/NaClO4 SPE with the addition of 5% nano-SiO2 from sugarcane bagasse at 60 °C produced SPE with the highest ionic conductivity, 1.18 × 10-6 S/cm. It was concluded that the addition of nano-SiO2 increased ionic conductivity and interface stability at the solid polymer electrolyte-PEO/NaClO4.
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28
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Kim HS, Kwon T, Park CB, Sung BJ. Temperature Dependence of Conformational Relaxation of Poly(ethylene oxide) Melts. Polymers (Basel) 2021; 13:4049. [PMID: 34833348 PMCID: PMC8618988 DOI: 10.3390/polym13224049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/12/2021] [Accepted: 11/18/2021] [Indexed: 11/16/2022] Open
Abstract
The time-temperature superposition (TTS) principle, employed extensively for the analysis of polymer dynamics, is based on the assumption that the different normal modes of polymer chains would experience identical temperature dependence. We aim to test the critical assumption for TTS principle by investigating poly(ethylene oxide) (PEO) melts, which have been considered excellent solid polyelectrolytes. In this work, we perform all-atom molecular dynamics simulations up to 300 ns at a range of temperatures for PEO melts. We find from our simulations that the conformations of strands of PEO chains in melts show ideal chain statistics when the strand consists of at least 10 monomers. At the temperature range of T= 400 to 300 K, the mean-square displacements (⟨Δr2(t)⟩) of the centers of mass of chains enter the Fickian regime, i.e., ⟨Δr2(t)⟩∼t1. On the other hand, ⟨Δr2(t)⟩ of the monomers of the chains scales as ⟨Δr2(t)⟩∼t1/2 at intermediate time scales as expected for the Rouse model. We investigate various relaxation modes of the polymer chains and their relaxation times (τn), by calculating for each strand of n monomers. Interestingly, different normal modes of the PEO chains experience identical temperature dependence, thus indicating that the TTS principle would hold for the given temperature range.
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Affiliation(s)
| | | | | | - Bong June Sung
- Department of Chemistry, Sogang University, Seoul 04107, Korea; (H.S.K.); (T.K.); (C.B.P.)
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29
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Kharat Z, Amiri Goushki M, Sarvian N, Asad S, Dehghan MM, Kabiri M. Chitosan/ PEO nanofibers containing Calendula officinalis extract: Preparation, characterization, in vitro and in vivo evaluation for wound healing applications. Int J Pharm 2021; 609:121132. [PMID: 34563618 DOI: 10.1016/j.ijpharm.2021.121132] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 09/10/2021] [Accepted: 09/21/2021] [Indexed: 10/20/2022]
Abstract
Wound healing is a complex pathophysiological process, highlighting the importance of effective and thorough wound care along with the prevention of wound infection, a major barrier that can slow down or even disrupt the healing process. To date, there are plenty of herbal plants well known and historically supernatural, showing profound wound healing effects. Application of such herbal extracts/ingredients in electrospun nanofiber platforms has shown promising outcomes in improving wound healing process. Based on these facts, we loaded Calendula officinalis extract (CO) in chitosan/polyethylene oxide scaffolds (CS/PEO) by electrospinning. Using SEM, morphology of electrospun scaffolds showed a narrow range of fiber diameter, around 143--252 nm, with uniform and bead-free appearance. FT-IR spectroscopy confirmed the presence of CO extract in nanofibrous scaffolds. Of importance, incorporation of CO extract improved mechanical properties of CS/PEO nanofibers. A 1602 cP reduction in viscosity and a 0.892 ms/cm increase in the conductivity of the solution was observed after addition of the CO extract. CO extract showed strong antibacterial properties with 96% and 94% reduction in Gram positive and Gram negative bacteria, respectively. In vitro studies with fibroblast cells confirmed enhanced proliferation, growth and attachment of the cells. The in vivo and histological analysis of rat wounds, revealed excellent wound healing ability of CS/PEO/CO dressings (87.5 % wound closure after 14 days) via improving collagen synthesis, re-epithelization and remodeling of the tissue. In sum, our findings show that CS/PEO/CO scaffolds can be used as a promising dressing for the treatment of skin wounds.
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Affiliation(s)
- Zahra Kharat
- Department of Biotechnology, College of Science, University of Tehran, Tehran 14155-6455, Iran
| | - Mehdi Amiri Goushki
- Department of Life Science Engineering, Faculty of New Sciences & Technologies, University of Tehran, Tehran 14395-1561, Iran
| | - Nazanin Sarvian
- Department of Surgery and Radiology, Faculty of Veterinary Medicine, University of Tehran, Tehran 1417466191, Iran
| | - Sedigheh Asad
- Department of Biotechnology, College of Science, University of Tehran, Tehran 14155-6455, Iran
| | - Mohammad Mehdi Dehghan
- Department of Surgery and Radiology, Faculty of Veterinary Medicine, University of Tehran, Tehran 1417466191, Iran
| | - Mahboubeh Kabiri
- Department of Biotechnology, College of Science, University of Tehran, Tehran 14155-6455, Iran.
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30
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Orsucci D. Mitochondrial Medicine in the COVID-19 Era. J Clin Med 2021; 10:jcm10225235. [PMID: 34830516 PMCID: PMC8619480 DOI: 10.3390/jcm10225235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 11/08/2021] [Indexed: 11/16/2022] Open
Affiliation(s)
- Daniele Orsucci
- Unit of Neurology, San Luca Hospital, Via Lippi-Francesconi, 55100 Lucca, Italy
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Aziz SB, Nofal MM, Brza MA, Hussein SA, Mahmoud KH, El-Bahy ZM, Dannoun EMA, Kareem WO, Hussein AM. Characteristics of PEO Incorporated with CaTiO 3 Nanoparticles: Structural and Optical Properties. Polymers (Basel) 2021; 13:3484. [PMID: 34685244 DOI: 10.3390/polym13203484] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 10/03/2021] [Accepted: 10/07/2021] [Indexed: 11/17/2022] Open
Abstract
In this research, direct band gap polymer composites with amorphous phase, which are imperative for optoelectronic devices applications were synthesized. The solution cast technique was used to produce polyethylene oxide (PEO)/calcium titanate (CaTiO3) nanocomposite (NC) films. The X-ray diffraction (XRD) confirms the growth of amorphous nature within PEO with CaTiO3 addition. The optical band gaps of pure PEO and PEO/CaTiO3 NC films were calculated using analysis of ultraviolet-visible (UV-Vis) spectra. The change in absorption edge toward lower photon energy is evidence of polymer modification. The dispersion behavior of the refractive index of PEO was manipulated to a higher wavelength upon doping with CaTiO3. Upon adding CaTiO3 to the pure PEO polymer, the dielectric constant and refractive index were considerably modified. The band gap shifts from 4.90 eV to 4.19 eV for the PEO incorporated with an optimum portion of 8 wt. % of CaTiO3. The types of the electronic transition in composite samples were specified, based on the Taucs model and the optical dielectric loss. The alteration of UV/Vis absorption spectra of the NC film was considered a suitable candidate to be applied in nanotechnology-based devices. The spherulites ascribed to the crystalline phase were distinguished through the optical microscopy (OM) study.
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Abstract
Two-dimensional (2D) silicate materials have become one of the promising candidates for constructing composite polymer electrolytes due to their advantages of low cost, high stability, good mechanical property, high ionic conductivity and potential to inhibit the growth of lithium dendrites. However, the application of 2D silicate materials in composite polymer electrolytes (CPEs) is still at the infancy stage and facing a lot of challenges. In this minireview, we summarize the structures and properties of 2D silicate materials that have been applied in CPEs, the processing methods of composite electrolytes based on 2D silicates, and the recent process of 2D silicate materials in CPEs. We hope this review could present a general overview of the 2D silicates for CPEs and promote the further study for potential applications.
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Affiliation(s)
- Hui Tang
- School of Optical and Electronic Information, Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Mingxuan Sun
- School of Optical and Electronic Information, Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Chengliang Wang
- School of Optical and Electronic Information, Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
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Lin Y, Du J, Wang W, Ren H, Zhao D, Liu F, Lin P, Ji K, Zhao Y, Yan C. Novel biallelic mutations in POLG gene: large deletion and missense variant associated with PEO. Neurol Sci 2021. [PMID: 34189666 DOI: 10.1007/s10072-021-05380-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 06/03/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND Mitochondrial disorders are clinically heterogeneous diseases associated with impaired oxidative phosphorylation (OXPHOS) activity. POLG, which encodes the DNA polymerase-γ (Polγ) catalytic subunit, is the most commonly mutated nuclear gene associated with mitochondrial disorders. METHODS We carried out whole-exome sequencing (WES) to identify the gene associated with progressive external ophthalmoplegia (PEO). We then performed histopathological analyses, assessed mitochondrial biology, and executed functional studies to evaluate the potential pathogenicity of the identified genetic mutations. RESULTS Novel biallelic POLG mutations, including a large deletion mutation (exons 7-21) and a missense variant c.1796C>T (p.Thr599Ile) were detected in the proband. Histopathological analysis of a biopsied muscle sample from this patient revealed the presence of approximately 20% COX-negative fibers. Bioinformatics analyses confirmed that the detected mutations were pathogenic. Furthermore, levels of mitochondrial complex I, II, and IV subunit protein expressions were found to be decreased in the proband, and marked impairment of mitochondrial respiration was evident in cells harboring these mutations. CONCLUSION This study expands the spectrum of known POLG variants associated with PEO and advances current understanding regarding the structural and functional impacts of these mutations.
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Yigit O, Ozdemir N, Dikici B, Kaseem M. Surface Properties of Graphene Functionalized TiO 2/nHA Hybrid Coatings Made on Ti6Al7Nb Alloys via Plasma Electrolytic Oxidation ( PEO). Molecules 2021; 26:3903. [PMID: 34202400 PMCID: PMC8271534 DOI: 10.3390/molecules26133903] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 06/22/2021] [Accepted: 06/22/2021] [Indexed: 11/16/2022] Open
Abstract
Nano-hydroxyapatite (nHA)-matrix coatings containing graphene nanosheets (GNS)-nHA were coated on Ti6Al7Nb alloys by plasma electrolytic oxidation (PEO) treatment for the improvement of their surface properties. Crystallographic properties, functional groups, and elemental analysis of coatings were characterized by XRD, ATR-FTIR, and EDS analysis. Surface morphological changes of the coated surfaces were investigated by AFM and SEM. The electrochemical corrosion behavior of the coatings was examined by using the potentiodynamic scanning (PDS) tests under in-vitro conditions in simulated body fluid (SBF). The results showed that the GNS was successfully deposited in ceramic matrix coatings on Ti6Al7Nb alloys. Also, the microstructural observations revealed that the coatings have a porous and rough structure. The XRD and ATR-FTIR quantitative analysis have proved the appearance of HA and GNS in the coating layers. An increase in the coating thickness, surface hardness, and anatase/rutile transformation rate was determined, while the GNS ratio in the coating layers was increased. The microhardness of the nHA coating reinforced with 1.5 wt% GNS was measured at 862 HV, which was significantly higher than that of GNS-free (only nHA) coating (584 HV). The best in-vitro resistance to corrosion in SBF was observed in the nHA/1.5GNS wt% coating.
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Affiliation(s)
- Oktay Yigit
- Department of Metallurgical and Materials Engineering, Firat University, Elazig 23119, Turkey; (O.Y.); (N.O.)
| | - Niyazi Ozdemir
- Department of Metallurgical and Materials Engineering, Firat University, Elazig 23119, Turkey; (O.Y.); (N.O.)
| | - Burak Dikici
- Department of Metallurgical and Materials Engineering, Ataturk University, Erzurum 25240, Turkey
| | - Mosab Kaseem
- Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Korea;
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Orsucci D, Caldarazzo Ienco E, Rossi A, Siciliano G, Mancuso M. Mitochondrial Syndromes Revisited. J Clin Med 2021; 10:1249. [PMID: 33802970 DOI: 10.3390/jcm10061249] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 03/01/2021] [Accepted: 03/12/2021] [Indexed: 12/19/2022] Open
Abstract
In the last ten years, the knowledge of the genetic basis of mitochondrial diseases has significantly advanced. However, the vast phenotypic variability linked to mitochondrial disorders and the peculiar characteristics of their genetics make mitochondrial disorders a complex group of disorders. Although specific genetic alterations have been associated with some syndromic presentations, the genotype–phenotype relationship in mitochondrial disorders is complex (a single mutation can cause several clinical syndromes, while different genetic alterations can cause similar phenotypes). This review will revisit the most common syndromic pictures of mitochondrial disorders, from a clinical rather than a molecular perspective. We believe that the new phenotype definitions implemented by recent large multicenter studies, and revised here, may contribute to a more homogeneous patient categorization, which will be useful in future studies on natural history and clinical trials.
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Lv F, Liu K, Wang Z, Zhu J, Zhao Y, Yuan S. Ultraviolet-cured polyethylene oxide-based composite electrolyte enabling stable cycling of lithium battery at low temperature. J Colloid Interface Sci 2021; 596:257-266. [PMID: 33839352 DOI: 10.1016/j.jcis.2021.02.095] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 02/22/2021] [Accepted: 02/23/2021] [Indexed: 11/30/2022]
Abstract
The room and low-temperature performances of solid-state lithium batteries are crucial to expand their practical application. Polyethylene oxide (PEO) has received great attention as the most representative polymer electrolyte matrix. However, most PEO-based solid-state batteries need to operate at high temperature due to low room temperature ionic conductivity. Improving the ionic conductivity by adding plasticizers or reducing the crystallinity of PEO often compromises its mechanical strength. Here, an amorphous PEO-based composite solid-state electrolyte is obtained by ultraviolet (UV) polymerizing PEO and methacryloyloxypropyltrimethoxy silane (KH570)-modified SiO2 which demonstrates both satisfactory mechanical performance and high ionic conductivity at room (3.37 × 10-4 S cm-1) and low temperatures (1.73 × 10-4 S cm-1 at 0 °C). In this electrolyte, the crystallinity of PEO is reduced through cross-linking, and therefore provides a fast Li+ ions transfer area. Moreover, the KH570-modified SiO2 inorganic particles promote the dissociation of lithium salts by Lewis acid centers to increase the ionic conductivity. Importantly, this kind of cross-linking networks endows the final electrolyte much higher mechanical strength than the pure PEO polymer electrolyte or PEO-inorganic filler blended systems. The solid-state LiFePO4/Li cell assembled with this electrolyte exhibits excellent cycling performance and high capacity at room and low temperatures.
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Affiliation(s)
- Fei Lv
- Research Centre of Nanoscience and Nanotechnology, Shanghai University, Shanghai 200444, China
| | - Kexin Liu
- School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
| | - Zhuyi Wang
- Research Centre of Nanoscience and Nanotechnology, Shanghai University, Shanghai 200444, China.
| | - Jiefang Zhu
- Department of Chemistry - Ångström Laboratory, Uppsala University, SE-751 21 Uppsala, Sweden
| | - Yin Zhao
- Research Centre of Nanoscience and Nanotechnology, Shanghai University, Shanghai 200444, China
| | - Shuai Yuan
- Research Centre of Nanoscience and Nanotechnology, Shanghai University, Shanghai 200444, China; Emerging Industries Institute, Shanghai University, Jiaxing, Zhejiang 314006, China.
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Peer P, Zelenkova J, Filip P, Lovecka L. An Estimate of the Onset of Beadless Character of Electrospun Nanofibers Using Rheological Characterization. Polymers (Basel) 2021; 13:polym13020265. [PMID: 33466955 PMCID: PMC7829922 DOI: 10.3390/polym13020265] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 01/05/2021] [Accepted: 01/12/2021] [Indexed: 01/14/2023] Open
Abstract
Electrospinning represents the very effective process of producing nanofibrous mats. This process is influenced by a number of mutually and strongly interlaced entry parameters (characteristics of polymer, solvent, process parameters) and their participation in the resulting nanofiber quality. The appearance of nanofibers is a result of the necessary primary experimental parameter setting within an acceptable range. However, finer analysis of nanofiber quality depends on the proper choice of these individual factors. The aim of this contribution is to evaluate one of the key factors—polymer concentration—with respect to the presence or absence of bead formation. This passage can be approximated by rheological oscillatory measurements when a sudden decrease in phase angle indicates this change. It replaces otherwise time- and cost-consuming trial-and-error experiments. This approach was tested using three different materials: solutions of poly(vinylidene fluoride-co-hexafluoropropylene), poly(vinyl butyral), and poly(ethylene oxide).
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Affiliation(s)
- Petra Peer
- Institute of Hydrodynamics, Czech Academy of Sciences, 166 12 Prague, Czech Republic; (J.Z.); (P.F.)
- Correspondence:
| | - Jana Zelenkova
- Institute of Hydrodynamics, Czech Academy of Sciences, 166 12 Prague, Czech Republic; (J.Z.); (P.F.)
| | - Petr Filip
- Institute of Hydrodynamics, Czech Academy of Sciences, 166 12 Prague, Czech Republic; (J.Z.); (P.F.)
| | - Lenka Lovecka
- Centre of Polymer Systems, University Institute, Tomas Bata University in Zlin, 760 01 Zlin, Czech Republic;
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38
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Wang Z, Yang L, Liu J, Song Y, Zhao Q, Yang K, Pan F. Tuning Rate-Limiting Factors to Achieve Ultrahigh-Rate Solid-State Sodium-Ion Batteries. ACS Appl Mater Interfaces 2020; 12:48677-48683. [PMID: 33064447 DOI: 10.1021/acsami.0c15015] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Exhibiting superior safety features and low costs, solid-state sodium (Na)-ion batteries have been proposed as an attractive candidate for energy storage. However, the poor rate capability of solid-state batteries has limited their applications. In this work, an all-solid-state Na-ion battery is fabricated, delivering an unprecedented rate capability (60% capacity retention at a C-rate of 100 C with an areal loading of 1.5 mg cm-2), which far exceeds other reports so far. More importantly, it is further demonstrated that instead of the Na-ion conductivity of the solid electrolyte, the rate-limiting factors are determined to be charge-transfer resistance at electrode/solid electrolyte interfaces and lack of percolation pathways in the electrode, which can be optimized by tuning the electrode design and testing protocols.
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Affiliation(s)
- Zijian Wang
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Luyi Yang
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Jiajie Liu
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Yongli Song
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Qinghe Zhao
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Kai Yang
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Feng Pan
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
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Asare-Addo K, Totea AM, Nokhodchi A. Drug release from magnesium aluminium silicate-polyethylene oxide ( PEO) nanocomposite matrices: An investigation using the USP III apparatus. Eur J Pharm Sci 2020; 153:105474. [PMID: 32702388 DOI: 10.1016/j.ejps.2020.105474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 07/14/2020] [Accepted: 07/18/2020] [Indexed: 10/23/2022]
Abstract
This work investigated the use of the USP III apparatus in discriminating simulated fed and fasted conditions as well as ionic strength on veegum-polyethylene (PEO) (called clay-PEO matrices hereafter) matrices. The successful formulations were characterised using differential scanning calorimetry (DSC) and evaluated for their physical properties. Isothermal calorimetry (ITC) was used to evaluate the thermodynamics of the complexation processes. The effect of agitation sequences on the matrices as evaluated from the USP III suggested an increase in polymer content to significantly decrease the burst release experienced using diltiazem hydrochloride (DILT) as a model cationic drug. The manufacturing methods showed superior performance in relation to a decrease in burst release over the physical manufactured counterparts. The clay-PEO matrices also showed robustness (no matrix failure) in up to 0.2 M ionic strength solutions mimicking the upper limit experienced in the GI tract. ITC results revealed that the binding between DILT and PEO was enthalpy and entropy-driven. Furthermore, the binding between veegum and DILT in the presence of PEO was shown to be enthalpy-driven and entropically unfavourable, which was also the case for the binding between veegum and PEO thus giving insights to how the matrices were performing on a molecular level.
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Affiliation(s)
- Kofi Asare-Addo
- University of Huddersfield, Department of Pharmacy, Queensgate, Huddersfield, HD1 3DH.
| | - Ana-Maria Totea
- University of Huddersfield, Department of Pharmacy, Queensgate, Huddersfield, HD1 3DH
| | - Ali Nokhodchi
- Pharmaceutics Research Laboratory, School of Life Sciences, University of Sussex, Brighton, BN1 9QJ, UK.
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40
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Temeche E, Zhang X, Laine RM. Solid Electrolytes for Li-S Batteries: Solid Solutions of Poly(ethylene oxide) with Li xPON- and Li xSiPON-Based Polymers. ACS Appl Mater Interfaces 2020; 12:30353-30364. [PMID: 32519843 DOI: 10.1021/acsami.0c06196] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We report here efforts to synthesize free-standing, dry polymer electrolytes that exhibit superior ionic conductivities at ambient for Li-S batteries. Co-dissolution of poly(ethylene oxide) (PEO) (Mn 900k) with LixPON and LixSiPON polymer systems at a ratio of approximately 3:2 followed by casting provides transparent, solid-solution films 25-50 μm thick, lowering PEO crystallinity, and providing measured impedance values of 0.1-2.8 × 10-3 S/cm at ambient. These values are much higher than simple PEO/Li+ salt systems. These solid-solution polymer electrolytes (PEs) are (1) thermally stable to 100 °C; (2) offer activation energies of 0.2-0.5 eV; (3) suppress dendrite formation; and (4) enable the use of lithium anodes at current densities as high as 3.5 mAh/cm2. Galvanostatic cycling of SPAN/PEs/Li cell (SPAN = sulfurized, carbonized polyacrylonitrile) shows discharge capacities of 1000 mAh/gsulfur at 0.25C and 800 mAh/gsulfur at 1C with high coulumbic efficiency over 100 cycles.
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Affiliation(s)
- Eleni Temeche
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, United States
| | - Xinyu Zhang
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, United States
| | - Richard M Laine
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, United States
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Echeverry-Rendon M, Echeverria F, Harmsen MC. Interaction of different cell types with magnesium modified by plasma electrolytic oxidation. Colloids Surf B Biointerfaces 2020; 193:111153. [PMID: 32505097 DOI: 10.1016/j.colsurfb.2020.111153] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 05/18/2020] [Accepted: 05/23/2020] [Indexed: 12/16/2022]
Abstract
Magnesium (Mg) is a material widely used in industrial applications due to its low weight, ductility, and excellent mechanical properties. For non-permanent implants, Mg is particularly well-suited because of its biodegradability, while its degradation products are not harmful. However, Mg is chemically reactive, and cytotoxic hydrogen gas is released as part of the degradation. This adverse degradation can be tuned using plasma electrolytic oxidation (PEO). With PEO, a surface layer of MgO/Mg(OH)2 is deposited on the surface of Mg in a controlled way. The electrolytes used during PEO influence the surface's chemistry and topography and thus expectedly the biological response of adhered cells. In this study, thin samples of commercial pure of Mg (c.p Mg) were modified by PEO guided by different electrolytes, and the biological activity was assessed on vascular cells, immune cells, and repair cells (adipose tissue-derived stromal cells, ASCs). Vascular cells were more vulnerable than ASCs for compounds released by surface-coated Mg. All surface coatings supported the proliferation of adhered ASC. Released compounds from surface-coated Mg delayed but did not block in vitro wound closure of fibroblasts monolayers. Preformed endothelial tubes were vulnerable for released compounds, while their supporting ASC was not. We conclude that PEO-based surface-coating of Mg supports adhesion and future delivery of therapeutic vascular repair cells such as ASC, but that the observed vulnerability of vascular cells for coated Mg components warrants investigations in vivo.
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Affiliation(s)
- Monica Echeverry-Rendon
- Centro de Investigación, Innovación y Desarrollo de Materiales CIDEMAT, Facultad de Ingeniería, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia; University of Groningen, University Medical Center Groningen, Department of Pathology and Medical Biology, Hanzeplein 1, EA11, NL-9713 GZ, Groningen, The Netherlands.
| | - Felix Echeverria
- Centro de Investigación, Innovación y Desarrollo de Materiales CIDEMAT, Facultad de Ingeniería, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
| | - Martin C Harmsen
- University of Groningen, University Medical Center Groningen, Department of Pathology and Medical Biology, Hanzeplein 1, EA11, NL-9713 GZ, Groningen, The Netherlands
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Akhmetova A, Lanno GM, Kogermann K, Malmsten M, Rades T, Heinz A. Highly Elastic and Water Stable Zein Microfibers as a Potential Drug Delivery System for Wound Healing. Pharmaceutics 2020; 12:E458. [PMID: 32443445 PMCID: PMC7284525 DOI: 10.3390/pharmaceutics12050458] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 05/12/2020] [Accepted: 05/15/2020] [Indexed: 12/15/2022] Open
Abstract
The development of biomaterials for wound healing applications requires providing a number of properties, such as antimicrobial action, facilitation of cell proliferation, biocompatibility and biodegradability. The aim of the present study was to investigate morphological and mechanical properties of zein-based microfibers, ultimately aimed at creating an environment suitable for wound healing. This was achieved through co-axial electrospinning of core-shell microfibers, with zein protein in the core and polyethylene oxide (PEO) in the shell. Small amounts of PEO or stearic acid were additionally incorporated into the fiber core to modify the morphology and mechanical properties of zein fibers. The presence of PEO in the core was found to be essential for the formation of tubular fibers, whereas PEO in the shell enhanced the stability of the microfibers in water and ensured high elasticity of the microfiber mats. Tetracycline hydrochloride was present in an amorphous form within the fibers, and displayed a burst release as a result of pore-formation in the fibers. The developed systems exhibited antimicrobial activity against Staphylococcus aureus and Escherichia coli, and showed no cytotoxic effect on fibroblasts. Biocompatibility, antimicrobial activity and favorable morphological and mechanical properties make the developed zein-based microfibers a potential biomaterial for wound healing purposes.
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Affiliation(s)
- Alma Akhmetova
- LEO Foundation Center for Cutaneous Drug Delivery, Department of Pharmacy, University of Copenhagen, 2100 Copenhagen, Denmark; (A.A.); (M.M.); (T.R.)
| | | | - Karin Kogermann
- Institute of Pharmacy, University of Tartu, 50411 Tartu, Estonia;
| | - Martin Malmsten
- LEO Foundation Center for Cutaneous Drug Delivery, Department of Pharmacy, University of Copenhagen, 2100 Copenhagen, Denmark; (A.A.); (M.M.); (T.R.)
- Department of Physical Chemistry, Lund University, 221 00 Lund, Sweden
| | - Thomas Rades
- LEO Foundation Center for Cutaneous Drug Delivery, Department of Pharmacy, University of Copenhagen, 2100 Copenhagen, Denmark; (A.A.); (M.M.); (T.R.)
| | - Andrea Heinz
- LEO Foundation Center for Cutaneous Drug Delivery, Department of Pharmacy, University of Copenhagen, 2100 Copenhagen, Denmark; (A.A.); (M.M.); (T.R.)
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Peter B, Falkenberg M. TWINKLE and Other Human Mitochondrial DNA Helicases: Structure, Function and Disease. Genes (Basel) 2020; 11:genes11040408. [PMID: 32283748 PMCID: PMC7231222 DOI: 10.3390/genes11040408] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 04/06/2020] [Accepted: 04/07/2020] [Indexed: 12/30/2022] Open
Abstract
Mammalian mitochondria contain a circular genome (mtDNA) which encodes subunits of the oxidative phosphorylation machinery. The replication and maintenance of mtDNA is carried out by a set of nuclear-encoded factors—of which, helicases form an important group. The TWINKLE helicase is the main helicase in mitochondria and is the only helicase required for mtDNA replication. Mutations in TWINKLE cause a number of human disorders associated with mitochondrial dysfunction, neurodegeneration and premature ageing. In addition, a number of other helicases with a putative role in mitochondria have been identified. In this review, we discuss our current knowledge of TWINKLE structure and function and its role in diseases of mtDNA maintenance. We also briefly discuss other potential mitochondrial helicases and postulate on their role(s) in mitochondria.
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Li S, Tian M, Wang J, Du F, Li L, Xue Z. Poly (Ethylene Oxide)-Based Block Copolymer Electrolytes Formed via Ligand-Free Iron-Mediated Atom Transfer Radical Polymerization. Polymers (Basel) 2020; 12:E763. [PMID: 32244569 DOI: 10.3390/polym12040763] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 03/02/2020] [Accepted: 03/10/2020] [Indexed: 01/08/2023] Open
Abstract
The Br-terminated poly (ethylene oxide) (PEO-Br) is used as a green and efficient macroinitiator in bulk Fe-catalyzed atom transfer radical polymerization (ATRP) without the addition of any organic ligands. The polymerization rate is able to be mediated by PEO-Br with various molecular weights, and the decrease in redox potential of FeBr2 in cyclic voltammetry (CV) curves indicates that an increased coordination effect is deteriorated with the depressing reaction activity in the longer ethylene oxide (EO) chain in PEO-Br. In combination with the study of different catalysts and catalytic contents, the methyl metharylate (MMA) or poly (ethylene glycol) monomethacrylate (PEGMA) was successfully polymerized with PEO-Br as an initiator. This copolymer obtained from PEGMA polymerization can be further employed as a polymer matrix to form the polymer electrolyte (PE). The higher ionic conductivity of PE was obtained by using a high molecular weight of copolymer.
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Sommerville EW, Dalla Rosa I, Rosenberg MM, Bruni F, Thompson K, Rocha M, Blakely EL, He L, Falkous G, Schaefer AM, Yu‐Wai‐Man P, Chinnery PF, Hedstrom L, Spinazzola A, Taylor RW, Gorman GS. Identification of a novel heterozygous guanosine monophosphate reductase (GMPR) variant in a patient with a late-onset disorder of mitochondrial DNA maintenance. Clin Genet 2020; 97:276-286. [PMID: 31600844 PMCID: PMC7004030 DOI: 10.1111/cge.13652] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 09/18/2019] [Accepted: 09/27/2019] [Indexed: 12/18/2022]
Abstract
Autosomal dominant progressive external ophthalmoplegia (adPEO) is a late-onset, Mendelian mitochondrial disorder characterised by paresis of the extraocular muscles, ptosis, and skeletal-muscle restricted multiple mitochondrial DNA (mtDNA) deletions. Although dominantly inherited, pathogenic variants in POLG, TWNK and RRM2B are among the most common genetic defects of adPEO, identification of novel candidate genes and the underlying pathomechanisms remains challenging. We report the clinical, genetic and molecular investigations of a patient who presented in the seventh decade of life with PEO. Oxidative histochemistry revealed cytochrome c oxidase-deficient fibres and occasional ragged red fibres showing subsarcolemmal mitochondrial accumulation in skeletal muscle, while molecular studies identified the presence of multiple mtDNA deletions. Negative candidate screening of known nuclear genes associated with PEO prompted diagnostic exome sequencing, leading to the prioritisation of a novel heterozygous c.547G>C variant in GMPR (NM_006877.3) encoding guanosine monophosphate reductase, a cytosolic enzyme required for maintaining the cellular balance of adenine and guanine nucleotides. We show that the novel c.547G>C variant causes aberrant splicing, decreased GMPR protein levels in patient skeletal muscle, proliferating and quiescent cells, and is associated with subtle changes in nucleotide homeostasis protein levels and evidence of disturbed mtDNA maintenance in skeletal muscle. Despite confirmation of GMPR deficiency, demonstrating marked defects of mtDNA replication or nucleotide homeostasis in patient cells proved challenging. Our study proposes that GMPR is the 19th locus for PEO and highlights the complexities of uncovering disease mechanisms in late-onset PEO phenotypes.
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Affiliation(s)
- Ewen W. Sommerville
- Wellcome Centre for Mitochondrial Research, Institute of NeuroscienceNewcastle UniversityNewcastle upon TyneUK
| | - Ilaria Dalla Rosa
- Department of Clinical and Movement Neurosciences, UCL Queens Square Institute of Neurology, Royal Free CampusUniversity College LondonLondonUK
| | | | - Francesco Bruni
- Wellcome Centre for Mitochondrial Research, Institute of NeuroscienceNewcastle UniversityNewcastle upon TyneUK
- Department of Biosciences, Biotechnologies and BiopharmaceuticsUniversity of Bari “ldo Moro”BariItaly
| | - Kyle Thompson
- Wellcome Centre for Mitochondrial Research, Institute of NeuroscienceNewcastle UniversityNewcastle upon TyneUK
| | - Mariana Rocha
- Wellcome Centre for Mitochondrial Research, Institute of NeuroscienceNewcastle UniversityNewcastle upon TyneUK
| | - Emma L. Blakely
- Wellcome Centre for Mitochondrial Research, Institute of NeuroscienceNewcastle UniversityNewcastle upon TyneUK
| | - Langping He
- Wellcome Centre for Mitochondrial Research, Institute of NeuroscienceNewcastle UniversityNewcastle upon TyneUK
| | - Gavin Falkous
- Wellcome Centre for Mitochondrial Research, Institute of NeuroscienceNewcastle UniversityNewcastle upon TyneUK
| | - Andrew M. Schaefer
- Wellcome Centre for Mitochondrial Research, Institute of NeuroscienceNewcastle UniversityNewcastle upon TyneUK
| | - Patrick Yu‐Wai‐Man
- NIHR Biomedical Research Centre at Moorfields Eye Hospital and UCL Institute of OphthalmologyLondonUK
- MRC Mitochondrial Biology UnitUniversity of CambridgeCambridgeUK
- Cambridge Centre for Brain Repair, Department of Clinical NeurosciencesUniversity of CambridgeCambridgeUK
| | - Patrick F. Chinnery
- Department of Clinical Neuroscience & Medical Research Council Mitochondrial Biology UnitSchool of Clinical Medicine, University of CambridgeCambridgeUK
| | - Lizbeth Hedstrom
- Department of BiologyBrandeis UniversityWalthamMA
- Department of ChemistryBrandeis University, 415 South St.WalthamMA
| | - Antonella Spinazzola
- Department of Clinical and Movement Neurosciences, UCL Queens Square Institute of Neurology, Royal Free CampusUniversity College LondonLondonUK
- MRC Centre for Neuromuscular DiseasesUCL Institute of Neurology and National Hospital for Neurology and NeurosurgeryLondonUK
| | - Robert W. Taylor
- Wellcome Centre for Mitochondrial Research, Institute of NeuroscienceNewcastle UniversityNewcastle upon TyneUK
| | - Gráinne S. Gorman
- Wellcome Centre for Mitochondrial Research, Institute of NeuroscienceNewcastle UniversityNewcastle upon TyneUK
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Tan X, Wu Y, Tang W, Song S, Yao J, Wen Z, Lu L, Savilov SV, Hu N, Molenda J. Preparation of Nanocomposite Polymer Electrolyte via In Situ Synthesis of SiO 2 Nanoparticles in PEO. Nanomaterials (Basel) 2020; 10:nano10010157. [PMID: 31963244 PMCID: PMC7022720 DOI: 10.3390/nano10010157] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Revised: 12/31/2019] [Accepted: 01/13/2020] [Indexed: 11/16/2022]
Abstract
Composite polymer electrolytes provide an emerging solution for new battery development by replacing liquid electrolytes, which are commonly complexes of polyethylene oxide (PEO) with ceramic fillers. However, the agglomeration of fillers and weak interaction restrict their conductivities. By contrast with the prevailing methods of blending preformed ceramic fillers within the polymer matrix, here we proposed an in situ synthesis method of SiO2 nanoparticles in the PEO matrix. In this case, robust chemical interactions between SiO2 nanoparticles, lithium salt and PEO chains were induced by the in situ non-hydrolytic sol gel process. The in situ synthesized nanocomposite polymer electrolyte delivered an impressive ionic conductivity of ~1.1 × 10-4 S cm-1 at 30 °C, which is two orders of magnitude higher than that of the preformed synthesized composite polymer electrolyte. In addition, an extended electrochemical window of up to 5 V vs. Li/Li+ was achieved. The Li/nanocomposite polymer electrolyte/Li symmetric cell demonstrated a stable long-term cycling performance of over 700 h at 0.01-0.1 mA cm-2 without short circuiting. The all-solid-state battery consisting of the nanocomposite polymer electrolyte, Li metal and LiFePO4 provides a discharge capacity of 123.5 mAh g-1, a Coulombic efficiency above 99% and a good capacity retention of 70% after 100 cycles.
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Affiliation(s)
- Xinjie Tan
- College of Aerospace Engineering, Chongqing University, Chongqing 400044, China; (X.T.); (J.Y.)
| | - Yongmin Wu
- State Key Laboratory of Space Power-sources Technology, Shanghai Institute of Space Power-Sources, Shanghai 200245, China; (Y.W.); (W.T.)
| | - Weiping Tang
- State Key Laboratory of Space Power-sources Technology, Shanghai Institute of Space Power-Sources, Shanghai 200245, China; (Y.W.); (W.T.)
| | - Shufeng Song
- College of Aerospace Engineering, Chongqing University, Chongqing 400044, China; (X.T.); (J.Y.)
- Correspondence: (S.S.); (S.V.S.); (N.H.)
| | - Jianyao Yao
- College of Aerospace Engineering, Chongqing University, Chongqing 400044, China; (X.T.); (J.Y.)
| | - Zhaoyin Wen
- CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;
| | - Li Lu
- Department of Mechanical Engineering, National University of Singapore, Singapore 117575, Singapore;
- National University of Singapore Suzhou Research Institute, Suzhou 215000, China
| | - Serguei V. Savilov
- Chemistry Department, M.V. Lomonosov Moscow State University, Moscow 119991, Russia
- Correspondence: (S.S.); (S.V.S.); (N.H.)
| | - Ning Hu
- School of Mechanical Engineering, Hebei University of Technology, Tianjin 300401, China
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
- Correspondence: (S.S.); (S.V.S.); (N.H.)
| | - Janina Molenda
- Faculty of Energy and Fuels, AGH University of Science and Technology, Al Mickiewicza 30, PL-30059 Krakow, Poland;
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47
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Liu K, Zhang R, Sun J, Wu M, Zhao T. Polyoxyethylene ( PEO)|PEO-Perovskite|PEO Composite Electrolyte for All-Solid-State Lithium Metal Batteries. ACS Appl Mater Interfaces 2019; 11:46930-46937. [PMID: 31765131 DOI: 10.1021/acsami.9b16936] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Composite solid electrolytes (CSEs) are regarded as one of the most promising candidates for all-solid-state lithium metal batteries (ASSLMBs) due to inherited desirable features from both ceramic and polymer materials. However, poor interfacial contact/compatibility between the electrodes and solid electrolytes remains a critical challenge. In this work, we prepare a flexible CSE composed of polyoxyethylene (PEO)-perovskite composite with a layer of PEO on either side. This PEO|PEO-perovskite|PEO structure prevents direct contact between the perovskite and lithium metal at the anode side, avoiding the undesired reaction between the two materials (Ti4+ + Li → Ti3+ + Li+). Moreover, the design incorporating the PEO surface on either side enables superb contact between the electrolyte and the electrodes and buffers the change in electrolyte volume from the cathode and lithium metal during repeated cycling, resulting in low interfacial resistances and excellent cycling stability. Meanwhile, perovskite inorganic electrolyte Li0.33La0.557TiO3 (LLTO) 3D nanofiber networks formed by electrospinning enable the CSE to achieve enhanced mechanical strength and high ionic conductivity of 0.16 mS cm-1 at 24 °C. As a result, a Li|PEO-LiTFSI-LLTO|Li symmetric cell remains stable after 400 h of operation without short-circuiting. Most notably, a Li|PEO-LiTFSI-LLTO|LiFePO4 full battery is capable of delivering a high capacity of 135.0 mAh g-1 even at 2 C with a retention rate of 79.0% after 300 cycles at 60 °C. These results demonstrate that the integrated sandwich structure proposed in this work is effective in developing high-performance composite solid electrolytes for ASSLMBs.
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Affiliation(s)
- Ke Liu
- Department of Mechanical and Aerospace Engineering , The Hong Kong University of Science and Technology , Clear Water Bay , Kowloon , Hong Kong 999077 , China
| | - Ruihan Zhang
- Department of Mechanical and Aerospace Engineering , The Hong Kong University of Science and Technology , Clear Water Bay , Kowloon , Hong Kong 999077 , China
| | - Jing Sun
- Department of Mechanical and Aerospace Engineering , The Hong Kong University of Science and Technology , Clear Water Bay , Kowloon , Hong Kong 999077 , China
| | - Maochun Wu
- Department of Mechanical and Aerospace Engineering , The Hong Kong University of Science and Technology , Clear Water Bay , Kowloon , Hong Kong 999077 , China
| | - Tianshou Zhao
- Department of Mechanical and Aerospace Engineering , The Hong Kong University of Science and Technology , Clear Water Bay , Kowloon , Hong Kong 999077 , China
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48
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Draksler P, Janković B, Abramović Z, Lavrič Z, Meden A. Assessment of critical material attributes of polyethylene oxide for formulation of prolonged-release tablets. Drug Dev Ind Pharm 2019; 45:1949-1958. [PMID: 31752546 DOI: 10.1080/03639045.2019.1689991] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Physicochemical evaluation of polyethylene oxide (PEO) polymers with various molecular weights was performed at molecular (polymeric dispersion) and bulk level (powders, polymeric films, and tablets) with the aim of specifying polymer critical material attributes with the main contribution to drug release from prolonged-release tablets (PRTs). For this purpose, grades of PEO with low, medium, and high viscosity were used for formulating PRTs with a good soluble drug substance (dose solubility volume 15 ml). The results revealed a good correlation (r2=0.88) between in vivo data (pharmacokinetic parameters: Cmax and AUC) and the elastic property of PEO films determined with the nanoindentation method, demonstrating that film level can also be used for the in vivo prediction of drug dissolution. The study confirmed that polymer molecular weight and its viscosity are the most important critical material attributes affecting drug dissolution (in vitro) and in vivo bioavailability (e.g. Cmax and AUC). Our research revealed that the nanoindentation technique can distinguish well between various types of polymers, classifying PEO as the most ductile and polyvinyl alcohol as the most brittle. Finally, our study provides an approach for the determination of exact physical attributes of PEO as a critical material attribute from clinically relevant data, and it therefore fulfills the basic principles of product development by Quality by Design.
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Affiliation(s)
- Petra Draksler
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia.,Sandoz Development Center, Ljubljana, Slovenia
| | - Biljana Janković
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia.,Sandoz Development Center, Ljubljana, Slovenia
| | | | - Zoran Lavrič
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - Anton Meden
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
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49
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Chen G, Bai Y, Gao Y, Wang Z, Zhang K, Ni Q, Wu F, Xu H, Wu C. Inhibition of Crystallization of Poly(ethylene oxide) by Ionic Liquid: Insight into Plasticizing Mechanism and Application for Solid-State Sodium Ion Batteries. ACS Appl Mater Interfaces 2019; 11:43252-43260. [PMID: 31661238 DOI: 10.1021/acsami.9b16294] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
All-solid-state sodium ion batteries (ASIBs) possess enhanced safety and desired cycling life compared with conventional liquid sodium batteries, showing great potential in large-scale energy storage systems. Polymer electrolytes based on poly(ethylene oxide) (PEO) have been extensively studied for ASIBs due to superior flexibility and processability. However, PEO-based electrolyte without any modification can hardly meet the requirements of ASIBs at room temperature. In the past decade, unremitting efforts have been attached to inhibiting crystallization of PEO, especially via ionic liquid plasticizing. However, the plasticizing mechanism is not clear. Here we incorporated Pyr13FSI into PEO-NaClO4 electrolyte to investigate the plasticizing effect by infrared spectrum characterizations and DFT calculations. The results indicate that FSI- anions tend to adhere to the PEO backbone, generating enhanced coordination ability and more coordination sites. Solid-state sodium ion batteries using PEO-NaClO4-40 wt % Pyr13FSI as polymer electrolyte exhibit good cycling and rate performance. Insights into the plasticizing mechanism contribute to fabricating polymer electrolyte with high performance for ASIBs.
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Affiliation(s)
- Guanghai Chen
- Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering , Beijing Institute of Technology , 5# South Zhongguancun Street , Beijing 100081 , China
| | - Ying Bai
- Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering , Beijing Institute of Technology , 5# South Zhongguancun Street , Beijing 100081 , China
| | - Yongsheng Gao
- Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering , Beijing Institute of Technology , 5# South Zhongguancun Street , Beijing 100081 , China
| | - Zhaohua Wang
- Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering , Beijing Institute of Technology , 5# South Zhongguancun Street , Beijing 100081 , China
| | - Kun Zhang
- Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering , Beijing Institute of Technology , 5# South Zhongguancun Street , Beijing 100081 , China
| | - Qiao Ni
- Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering , Beijing Institute of Technology , 5# South Zhongguancun Street , Beijing 100081 , China
| | - Feng Wu
- Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering , Beijing Institute of Technology , 5# South Zhongguancun Street , Beijing 100081 , China
- Collaborative Innovation Center of Electric Vehicles in Beijing , Beijing 100081 , China
| | - Huajie Xu
- Key Laboratory of Materials Processing and Mold, Ministry of Education , Zhengzhou University , Zhengzhou 450002 , China
| | - Chuan Wu
- Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering , Beijing Institute of Technology , 5# South Zhongguancun Street , Beijing 100081 , China
- Collaborative Innovation Center of Electric Vehicles in Beijing , Beijing 100081 , China
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50
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Celik SBG, Dominici SR, Filby BW, Das AAK, Madden LA, Paunov VN. Fabrication of Human Keratinocyte Cell Clusters for Skin Graft Applications by Templating Water-in-Water Pickering Emulsions. Biomimetics (Basel) 2019; 4:E50. [PMID: 31336810 PMCID: PMC6784416 DOI: 10.3390/biomimetics4030050] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 06/24/2019] [Accepted: 07/08/2019] [Indexed: 12/12/2022] Open
Abstract
Most current methods for the preparation of tissue spheroids require complex materials, involve tedious physical steps and are generally not scalable. We report a novel alternative, which is both inexpensive and up-scalable, to produce large quantities of viable human keratinocyte cell clusters (clusteroids). The method is based on a two-phase aqueous system of incompatible polymers forming a stable water-in-water (w/w) emulsion, which enabled us to rapidly fabricate cell clusteroids from HaCaT cells. We used w/w Pickering emulsion from aqueous solutions of the polymers dextran (DEX) and polyethylene oxide (PEO) and a particle stabilizer based on whey protein (WP). The HaCaT cells clearly preferred to distribute into the DEX-rich phase and this property was utilized to encapsulate them in the water-in-water (DEX-in-PEO) emulsion drops then osmotically shrank to compress them into clusters. Prepared formulations of HaCaT keratinocyte clusteroids in alginate hydrogel were grown where the cells percolated to mimic 3D tissue. The HaCaT cell clusteroids grew faster in the alginate film compared to the individual cells formulated in the same matrix. This methodology could potentially be utilised in biomedical applications.
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Affiliation(s)
- Sevde B G Celik
- Department of Chemistry and Biochemistry, University of Hull, Hull HU6 7RX, UK
| | | | - Benjamin W Filby
- Department of Chemistry and Biochemistry, University of Hull, Hull HU6 7RX, UK
| | - Anupam A K Das
- Department of Chemistry and Biochemistry, University of Hull, Hull HU6 7RX, UK
| | - Leigh A Madden
- Department of Biomedical Science, University of Hull, Hull HU6 7RX, UK
| | - Vesselin N Paunov
- Department of Chemistry and Biochemistry, University of Hull, Hull HU6 7RX, UK.
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