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Yang D, Fan B, He YC. UV-blocking, antibacterial, corrosion resistance, antioxidant, and fruit packaging ability of lignin-rich alkaline black liquor composite film. Int J Biol Macromol 2024; 275:133344. [PMID: 38914391 DOI: 10.1016/j.ijbiomac.2024.133344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Revised: 05/18/2024] [Accepted: 06/19/2024] [Indexed: 06/26/2024]
Abstract
The novel multifunctional active packaging composite film with antimicrobial, antioxidant, water-vapor and UV-barrier, and corrosion resistance properties was successfully prepared from waste biomass. In this study, waste poplar sawdust was pretreated using green liquor to extract black liquor (BL). BL was then mixed with polyvinyl alcohol (PVA) solution for synthesizing silver nanoparticles (AgNPs). PVA-BL-AgNPs film was fabricated by solution casting method, and the microstructure characterization and macroscopic performance testing of the composite film were conducted. The results revealed that PVA-BL-AgNPs film exhibited inhibitory effects against Staphylococcus aureus (inhibition zone: 33.6 mm), Pseudomonas aeruginosa (inhibition zone: 31.6 mm), and Escherichia coli (inhibition zone: 32.0 mm). It could eliminate over 99 % of 2,2-diazodi (3-ethyl-benzothiazol-6-sulfonic acid) (ABTS) free radicals and provided 100 % UV-blocking, reducing light-induced food damage. It exhibited the improvement of water-vapor barrier properties and corrosion resistance. In vitro cytotoxicity assays demonstrated that no significant impact occurred on cell proliferation, confirming the safety of the film. Packaging experiments showed that PVA-BL-AgNPs film effectively inhibited milk spoilage and prolonged the shelf-life of bread and bananas. Therefore, PVA-BL-AgNPs film might extend the shelf-life of food and offer significant opportunities in addressing the issues of low safety and environmental pollution associated with traditional packaging films.
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Affiliation(s)
- Dan Yang
- School of Pharmacy & School of Biological and Food Engineering, Changzhou University, Changzhou 213164, China
| | - Bo Fan
- School of Pharmacy & School of Biological and Food Engineering, Changzhou University, Changzhou 213164, China
| | - Yu-Cai He
- School of Pharmacy & School of Biological and Food Engineering, Changzhou University, Changzhou 213164, China; State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan 430062, China.
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2
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Wang C, Guo J, Liu Q, Zeng X, Liu Y, Deng Y, Lin Y, Wu X, Deng H, Chen L, Weng W, Zhang Y. The characterization and analysis of the compound hemostatic cotton based on Ca 2+/poly (vinyl alcohol)/soluble starch-fish skin collagen. Int J Biol Macromol 2024; 262:130084. [PMID: 38350584 DOI: 10.1016/j.ijbiomac.2024.130084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 01/22/2024] [Accepted: 02/08/2024] [Indexed: 02/15/2024]
Abstract
Accidental bleeding is an unavoidable problem in daily life. To avoid the risk of excessive blood loss, it is urgent to design a functional material that can quickly stop bleeding. In this study, an efficient wound dressing for hemostasis was investigated. Based on the characteristics that Ca2+ and fish skin collagen (FSC) could activate the coagulation mechanism, hemostatic cotton was prepared by solvent replacement method using CaCl2, FSC, soluble starch (SS), and polyvinyl alcohol (PVA) as raw materials. The cytotoxicity test showed the Ca2+PVA/FSC-SS hemostatic cottons had good biocompatibility. The activated partial thromboplastin time (APTT) of Ca2+PVA/FSC-SS(4) was 35.34 s, which was 22.07 s faster than that of PVA/FSC-SS, indicating Ca2+PVA/FSC-SS mediated the endogenous coagulation system. In vitro coagulation test, Ca2+PVA/FSC-SS(4) could stop bleeding rapidly within 39.60 ± 5.16 s, and the ability of wound healing was higher than commercial product (Celox). This study developed a rapid procoagulant and hemostatic material, which had a promising application in a variety of environments.
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Affiliation(s)
- Chunchun Wang
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, Fujian, China
| | - Jiayi Guo
- School of Chemical Engineering and Technology, Hainan University, Haikou 570228, China
| | - Qun Liu
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, Fujian, China.
| | - Xu Zeng
- State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Yue Liu
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, Fujian, China
| | - Yanping Deng
- Department of Pathology, The Second Affiliated Hospital of Xiamen Medical College, Xiamen 361000, Fujian, China
| | - Yanli Lin
- Department of Pathology, The Second Affiliated Hospital of Xiamen Medical College, Xiamen 361000, Fujian, China
| | - Xialing Wu
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, Fujian, China
| | - Hongju Deng
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, Fujian, China
| | - Linjing Chen
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, Fujian, China
| | - Wuyin Weng
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, Fujian, China
| | - Yucang Zhang
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, Fujian, China.
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Babalola AV, Oluwasusi V, Owoeye VA, Emegha JO, Pelemo DA, Fasasi A, Gurku UM, Alayande SO, Yusuf S, Saje M B. Effect of tin concentrations on the elemental and optical properties of zinc oxide thin films. Heliyon 2024; 10:e23190. [PMID: 38187231 PMCID: PMC10770455 DOI: 10.1016/j.heliyon.2023.e23190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 11/27/2023] [Accepted: 11/29/2023] [Indexed: 01/09/2024] Open
Abstract
Pure zinc oxide and Sn-doped ZnO thin films were deposited on a pre-heated glass substrate from tin (II) chloride dihydrate (SnCl2.2H2O) and zinc acetate (Zn(CH3COO))2 precursors using spray pyrolysis technique. The doped films were achieved by adding various quantities of (SnCl2. 2H2O) precursor to the solution of zinc acetate in volume percent range of 0-10. Rutherford Backscattering Spectrometry (RBS) was used to characterise the prepared films to determine their thickness and elemental composition. To examine the films' optical characteristics, a UV spectrometer operating at room temperature and covering a wavelength range of 300-1100 nm was employed. The film's thickness and composition show that as the volume of Sn in the thin films increases, so does the film's thickness. With average transmittance values up to 70 %, all the films are quite transparent in the visible region of the electromagnetic spectrum and have a significant UV cut-off at roughly 380 nm. The reflectivity of Sn-doped ZnO films is seen to be independent of the volume of Sn in the films, and the reflectivity of the films diminishes as the wavelength increases. Sn-doped ZnO thin film has an optical band gap of 3.14-3.18 eV. The properties of the thin film produced make it suitable for solar energy collection and improve the efficiency of solar energy system, various optoelectronics devices and sensor.
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Affiliation(s)
- Adeoye Victor Babalola
- Nile University of Nigeria, Research and Institution Area, Jabi, Abuja, FCT, Nigeria
- Department of Physics, Nasarawa State University, Keffi, Nigeria
| | - Victoria Oluwasusi
- Department of Physics, Nasarawa State University, Keffi, Nigeria
- Department of Physics, Bingham University, Nasarawa, Nigeria
| | - Victor Adewale Owoeye
- Department of Physical and Chemical Sciences, Elizade University, Ilara-Mokin, Nigeria
| | - Joseph Onyeka Emegha
- College of Natural and Applied Sciences, Novena University Ogume, Delta State, Nigeria
| | - David A. Pelemo
- Centre for Energy Research and Development, Obafemi Awolowo University, Ile Ife, Nigeria
| | - A.Y. Fasasi
- Centre for Energy Research and Development, Obafemi Awolowo University, Ile Ife, Nigeria
| | - Umar Milka Gurku
- Department of Physics, Nasarawa State University, Keffi, Nigeria
| | | | - Samson Yusuf
- Department of Physics, Nasarawa State University, Keffi, Nigeria
| | - Baba Saje M
- Nile University of Nigeria, Research and Institution Area, Jabi, Abuja, FCT, Nigeria
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Sasmal A, Maity S, Arockiarajan A, Sen S. Electroactive properties and piezo-tribo hybrid energy harvesting performances of PVDF-AlFeO 3 composites: role of crystal symmetry and agglomeration of fillers. Dalton Trans 2023; 52:14837-14851. [PMID: 37791868 DOI: 10.1039/d3dt02547k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
Inorganic filler-loaded PVDF-based composites have been very widely used for electrical and energy harvesting applications in recent times. In this regard, the effects of different parameters of fillers like size, shape, chemical states, distribution, functional properties, and many others on the output performance of PVDF have been widely studied. However, the effect of another important parameter, namely the crystal symmetry of the filler, in tuning the energy harvesting performance of PVDF has been rarely explored. Therefore, to explore this fact, here we develop PVDF-based composite films by using two types of AlFeO3 fillers, one with rhombohedral R3̄c symmetry (AFRH) and another with an orthorhombic Pc21n structure. Ferrite-based oxides have been chosen here as fillers due to their good dielectric compatibility with PVDF. On the other hand, AlFeO3 has been chosen due to the simplicity of synthesizing it with both centrosymmetric and non-centrosymmetric crystal structures and the scarcity of reports exploring the energy-harvesting performance of AlFeO3-based polymer composites. A significant difference in particle agglomeration has also been observed here between the mentioned two types of AlFeO3 fillers which was mainly due to their specific synthesis conditions. The electroactive properties of PVDF have been observed to be mostly dependent on filler agglomeration. However, the crystal symmetry has shown a strong effect on the piezoelectric energy harvesting performances. As a result of these facts, the piezo-tribo hybrid energy harvesting performance, which depends on both the dielectric permittivity and piezoelectric activity, has been observed to be better for the AFRH5-based hybrid device (AFRH5H) (with ∼72 V open circuit voltage and ∼45 μW cm-2 power density) compared to that of the AFOR5-based hybrid device (AFOR5H). The real-life applications of all the energy harvesting devices have also been demonstrated here.
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Affiliation(s)
- Abhishek Sasmal
- Functional Materials and Devices Division, CSIR-Central Glass & Ceramic Research Institute, Kolkata - 700032, India.
- Department of Applied Mechanics, Indian Institute of Technology Madras, Chennai - 600036, India
| | - Sourav Maity
- Functional Materials and Devices Division, CSIR-Central Glass & Ceramic Research Institute, Kolkata - 700032, India.
| | - A Arockiarajan
- Department of Applied Mechanics, Indian Institute of Technology Madras, Chennai - 600036, India
- Centre of Excellence in Ceramics Technologies for Futuristic Mobility, Indian Institute of Technology Madras (IIT Madras), Chennai, Tamil Nadu - 600036, India
| | - Shrabanee Sen
- Functional Materials and Devices Division, CSIR-Central Glass & Ceramic Research Institute, Kolkata - 700032, India.
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Li Y, Fu Z, Li Y, Zhang G. A Comparative Study of CCM and CCS Membrane Electrode Assemblies for High-Temperature Proton Exchange Membrane Fuel Cells with a CsH 5(PO 4) 2-Doped Polybenzimidazole Membrane. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16113925. [PMID: 37297059 DOI: 10.3390/ma16113925] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/03/2023] [Accepted: 05/19/2023] [Indexed: 06/12/2023]
Abstract
Membrane electrode assemblies (MEAs) are critical components in influencing the electrochemical performance of high-temperature proton exchange membrane fuel cells (HT-PEMFCs). MEA manufacturing processes are mainly divided into the catalyst-coated membrane (CCM) and the catalyst-coated substrate (CCS) methods. For conventional HT-PEMFCs based on phosphoric acid-doped polybenzimidazole (PBI) membranes, the wetting surface and extreme swelling of the PA-doped PBI membranes make the CCM method difficult to apply to the fabrication of MEAs. In this study, by taking advantage of the dry surface and low swelling of a CsH5(PO4)2-doped PBI membrane, an MEA fabricated by the CCM method was compared with an MEA made by the CCS method. Under each temperature condition, the peak power density of the CCM-MEA was higher than that of the CCS-MEA. Furthermore, under humidified gas conditions, an enhancement in the peak power densities was observed for both MEAs, which was attributed to the increase in the conductivity of the electrolyte membrane. The CCM-MEA exhibited a peak power density of 647 mW cm-2 at 200 °C, which was ~16% higher than that of the CCS-MEA. Electrochemical impedance spectroscopy results showed that the CCM-MEA had lower ohmic resistance, which implied that it had better contact between the membrane and catalyst layer.
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Affiliation(s)
- Yizhe Li
- Merchant Marine College, Shanghai Maritime University, Shanghai 201306, China
| | - Zhiyong Fu
- School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yifan Li
- School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Guichen Zhang
- Merchant Marine College, Shanghai Maritime University, Shanghai 201306, China
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Wang Y, Peng Z, Zhang D, Song D. Tough, Injectable Calcium Phosphate Cement Based Composite Hydrogels to Promote Osteogenesis. Gels 2023; 9:gels9040302. [PMID: 37102913 PMCID: PMC10138173 DOI: 10.3390/gels9040302] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 03/29/2023] [Accepted: 03/30/2023] [Indexed: 04/07/2023] Open
Abstract
Osteoporosis is one of the most disabling consequences of aging, and osteoporotic fractures and a higher risk of subsequent fractures lead to substantial disability and deaths, indicating that both local fracture healing and early anti-osteoporosis therapy are of great significance. However, combining simple clinically approved materials to achieve good injection and subsequent molding and provide good mechanical support remains a challenge. To meet this challenge, bioinspired by natural bone components, we develop appropriate interactions between inorganic biological scaffolds and organic osteogenic molecules, achieving a tough hydrogel that is both firmly loaded with calcium phosphate cement (CPC) and injectable. Here, the inorganic component CPC composed of biomimetic bone composition and the organic precursor, incorporating gelatin methacryloyl (GelMA) and N-Hydroxyethyl acrylamide (HEAA), endow the system with fast polymerization and crosslinking through ultraviolet (UV) photo-initiation. The GelMA-poly (N-Hydroxyethyl acrylamide) (GelMA-PHEAA) chemical and physical network formed in situ enhances the mechanical performances and maintains the bioactive characteristics of CPC. This tough biomimetic hydrogel combined with bioactive CPC is a new promising candidate for a commercial clinical material to help patients to survive osteoporotic fracture.
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Affiliation(s)
- Yazhou Wang
- Department of Orthopedics, Shanghai General Hospital of Nanjing Medical University, Shanghai 201600, China
- Department of Orthopedics, Shanghai Songjiang District Central Hospital, Shanghai 201620, China
| | - Zhiwei Peng
- Department of Orthopedics, The Second Affiliated Hospital of Xuzhou Medical University, Xuzhou 221000, China
| | - Dong Zhang
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA 30332, USA
| | - Dianwen Song
- Department of Orthopedics, Shanghai General Hospital of Nanjing Medical University, Shanghai 201600, China
- School of Medicine, Shanghai Jiaotong University, Shanghai 200240, China
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Sasmal A, Senthilnathan J, Arockiarajan A, Yoshimura M. Two-Dimensional Metal-Organic Framework Incorporated Highly Polar PVDF for Dielectric Energy Storage and Mechanical Energy Harvesting. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1098. [PMID: 36985992 PMCID: PMC10058605 DOI: 10.3390/nano13061098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 03/15/2023] [Accepted: 03/15/2023] [Indexed: 06/18/2023]
Abstract
Here, we introduce a 2D metal-organic framework (MOF) into the poly(vinylidene fluoride) (PVDF) matrix, which has been comparatively less explored in this field. Highly 2D Ni-MOF has been synthesized in this regard via hydrothermal route and has been incorporated into PVDF matrix via solvent casting technique with ultralow filler (0.5 wt%) loading. The polar phase percentage of 0.5 wt% Ni-MOF loaded PVDF film (NPVDF) has been found to be increased to ~85% from a value of ~55% for neat PVDF. The ultralow filler loading has inhibited the easy breakdown path along with increased dielectric permittivity and hence has enhanced the energy storage performance. On the other hand, significantly enriched polarity and Young's Modulus has helped in improving its mechanical energy harvesting performance, thereby enhancing the human motion interactive sensing activities. The piezoelectric and piezo-tribo hybrid devices made up of NPVDF film have shown improved output power density of ~3.26 and 31 μW/cm2 compared to those of the piezoelectric and piezo-tribo hybrid devices comprising of neat PVDF (output power density ~0.6 and 17 μW/cm2, respectively). The developed composite can thus be considered an excellent candidate for multifunctional applications.
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Affiliation(s)
- Abhishek Sasmal
- Department of Applied Mechanics, Indian Institute of Technology Madras (IIT Madras), Chennai 600036, Tamil Nadu, India;
| | - Jaganathan Senthilnathan
- Department of Civil Engineering, Indian Institute of Technology Madras (IIT Madras), Chennai 600036, Tamil Nadu, India
| | - Arunachalakasi Arockiarajan
- Department of Applied Mechanics, Indian Institute of Technology Madras (IIT Madras), Chennai 600036, Tamil Nadu, India;
- Centre of Excellence in Ceramics Technologies for Futuristic Mobility, Indian Institute of Technology Madras (IIT Madras), Chennai 600036, Tamil Nadu, India
| | - Masahiro Yoshimura
- Department of Materials Science and Engineering, National Cheng Kung University, Tainan 70101, Taiwan
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Flame-Retarded Rigid Polyurethane Foam Composites with the Incorporation of Steel Slag/Dimelamine Pyrophosphate System: A New Strategy for Utilizing Metallurgical Solid Waste. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27248892. [PMID: 36558034 PMCID: PMC9783893 DOI: 10.3390/molecules27248892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Revised: 11/24/2022] [Accepted: 11/25/2022] [Indexed: 12/23/2022]
Abstract
Rigid polyurethane (RPUF) was widely used in external wall insulation materials due to its good thermal insulation performance. In this study, a series of RPUF and RPUF-R composites were prepared using steel slag (SS) and dimelamine pyrophosphate (DMPY) as flame retardants. The RPUF composites were characterized by thermogravimetric (TG), limiting oxygen index (LOI), cone calorimetry (CCT), and thermogravimetric infrared coupling (TG-FTIR). The results showed that the LOI of the RPUF-R composites with DMPY/SS loading all reached the combustible material level (22.0 vol%~27.0 vol%) and passed UL-94 V0. RPUF-3 with DMPY/SS system loading exhibited the lowest pHRR and THR values of 134.9 kW/m2 and 16.16 MJ/m2, which were 54.5% and 42.7% lower than those of unmodified RPUF, respectively. Additionally, PO· and PO2· free radicals produced by pyrolysis of DMPY could capture high energy free radicals, such as H·, O·, and OH·, produced by degradation of RPUF matrix, effectively blocking the free radical chain reaction of composite materials. The metal oxides in SS reacted with the polymetaphosphoric acid produced by the pyrolysis of DMPY in combustion. It covered the surface of the carbon layer, significantly insulating heat and mass transport in the combustion area, endowing RPUF composites with excellent fire performance. This work not only provides a novel strategy for the fabrication of high-performance RPUF composites, but also elucidates a method of utilizing metallurgical solid waste.
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