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Pantazidis C, Wang CL, Tomović Ž. High-Performance Organic Aerogels Tailored for Versatile Recycling Approaches: Recycling-Reforming-Upcycling. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2403931. [PMID: 39128129 DOI: 10.1002/smll.202403931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Revised: 07/25/2024] [Indexed: 08/13/2024]
Abstract
Organic aerogels are emerging as promising materials due to their versatile properties, rendering them excellent candidates for a variety of applications in the fields of thermal insulation, energy storage, pharmaceuticals, chemical adsorption, and catalysis. However, current aerogel designs rely on cross-linked polymer networks, which lack efficient end-of-use solutions, thereby hindering their overall sustainability. In this study, a facile synthesis of organic aerogels with a unique combination of imine and cyanurate moieties is presented, resulting in high-performance, lightweight insulating materials. The aerogels' structure, ensures mechanical robustness, thermal resistance, and hydrophobicity without additional treatments, crucial for long-term performance. Additionally, in response to the currently unsustainable use of cross-linked polymer materials, the molecular design offers diverse avenues of chemical recycling. These include full depolymerization back into the original monomers, partial network fragmentation producing soluble oligomers that can be promptly employed to fabricate new aerogels, and upcycling of aerogel waste into useful building blocks. This work pioneers a novel approach to material design, emphasizing recyclability as a core feature while maintaining high-performance excellence.
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Affiliation(s)
- Christos Pantazidis
- Polymer Performance Materials Group, Department of Chemical Engineering and Chemistry and Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, Eindhoven, MB 5600, The Netherlands
| | - Chang-Lin Wang
- Polymer Performance Materials Group, Department of Chemical Engineering and Chemistry and Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, Eindhoven, MB 5600, The Netherlands
| | - Željko Tomović
- Polymer Performance Materials Group, Department of Chemical Engineering and Chemistry and Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, Eindhoven, MB 5600, The Netherlands
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2
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El-Bastawisy HS, El-Sayyad GS, Abu Safe FA. Detection of hemolytic Shiga toxin-producing Escherichia coli in fresh vegetables and efficiency of phytogenically synthesized silver nanoparticles by Syzygium aromaticum extract and gamma radiation against isolated pathogens. BMC Microbiol 2023; 23:262. [PMID: 37723460 PMCID: PMC10508014 DOI: 10.1186/s12866-023-02994-8] [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: 05/10/2023] [Accepted: 08/25/2023] [Indexed: 09/20/2023] Open
Abstract
BACKGROUND Shiga toxin-producing E. coli (STEC) is a major cause of foodborne diseases accompanied by several clinical illnesses in humans. This research aimed to isolate, identify, and combat STEC using novel alternative treatments, researchers have lately investigated using plant extract to produce nanoparticles in an environmentally acceptable way. At various gamma-ray doses, gamma irradiation is used to optimize the conditions for the biogenically synthesized silver nanoparticles (Ag NPs) using an aqueous extract of clove as a reducing and stabilizing agent. METHODS On a specific medium, 120 vegetable samples were screened to isolate STEC and molecularly identified using real-time PCR. Moreover, the antibacterial and antibiofilm activities of biogenically synthesized Ag NPs against the isolated STEC were examined. RESULTS Twenty-five out of 120 samples of eight types of fresh vegetables tested positive for E. coli, as confirmed by 16S rRNA, of which three were positive for the presence of Stx-coding genes, and six were partially hemolytic. Seven antibiotic disks were used to determine antibiotic susceptibility; the results indicated that isolate STX2EC had the highest antibiotic resistance. The results demonstrated that Ag NPs were highly effective against the STEC isolates, particularly the isolate with the highest drug resistance, with inhibition zones recorded as 19 mm for STX2EC, 11 mm for STX1EC1, and 10 mm for STX1EC2 at a concentration of 108 µg/mL. MICs of the isolates STX1EC1, and STX1EC2 were 13.5 µg/mL whereas it was detected as 6.75 µg/mL for STX2EC. The percentages of biofilm inhibition for STX1EC2, STX1EC1, and STX2EC, were 78.7%, 76.9%, and 71.19%, respectively. CONCLUSION These findings suggest that the biogenic Ag NPs can be utilized as a new promising antibacterial agent to combat biofouling on surfaces.
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Affiliation(s)
- Hanan S El-Bastawisy
- Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt.
| | - Gharieb S El-Sayyad
- Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt.
| | - Feriala A Abu Safe
- Botany Department, Faculty of Women for Art, Science and Education, Ain Shams University, Cairo, Egypt
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3
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Hiranobe CT, Tolosa GR, Santos GTDA, de Oliveira JPJ, Budemberg ER, Silva MJD, Cabrera FC, Job AE, Paim LL, Torres GB, Santos RJD. Recycling waste polyurethane from the refrigeration industry as filler in
SBR
/
NR
composites for industrial applications. J Appl Polym Sci 2023. [DOI: 10.1002/app.53709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Affiliation(s)
- Carlos Toshiyuki Hiranobe
- Departamento de Engenharia de Energia, Faculdade de Engenharia e Ciências Universidade Estadual Paulista (UNESP), Campus de Rosana Rosana Brazil
| | - Gabrieli Roefero Tolosa
- Departamento de Física, Faculdade de Ciência e Tecnologia Universidade Estadual Paulista (UNESP), Campus de Presidente Prudente Presidente Prudente Brazil
| | - Gleyson Tadeu de Almeida Santos
- Departamento de Física, Faculdade de Ciência e Tecnologia Universidade Estadual Paulista (UNESP), Campus de Presidente Prudente Presidente Prudente Brazil
| | | | - Eduardo Roque Budemberg
- Departamento de Engenharia de Energia, Faculdade de Engenharia e Ciências Universidade Estadual Paulista (UNESP), Campus de Rosana Rosana Brazil
| | - Michael Jones da Silva
- Departamento de Engenharia de Energia, Faculdade de Engenharia e Ciências Universidade Estadual Paulista (UNESP), Campus de Rosana Rosana Brazil
| | - Flávio Camargo Cabrera
- Departamento de Engenharia de Energia, Faculdade de Engenharia e Ciências Universidade Estadual Paulista (UNESP), Campus de Rosana Rosana Brazil
| | - Aldo Eloizo Job
- Departamento de Física, Faculdade de Ciência e Tecnologia Universidade Estadual Paulista (UNESP), Campus de Presidente Prudente Presidente Prudente Brazil
| | - Leonardo Lataro Paim
- Departamento de Engenharia de Energia, Faculdade de Engenharia e Ciências Universidade Estadual Paulista (UNESP), Campus de Rosana Rosana Brazil
| | - Giovanni Barrera Torres
- Departamento de Ingeniería de Diseño Industrial Instituto Tecnológico Metropolitano (ITM) Medellín Colombia
| | - Renivaldo José dos Santos
- Departamento de Engenharia de Energia, Faculdade de Engenharia e Ciências Universidade Estadual Paulista (UNESP), Campus de Rosana Rosana Brazil
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Kumar R, Kumar P, Panigrahi S, Lakshminarasimhan N, Shunmugam R. Efficient removal of rhodamine B and methylene blue from water using polyurethane based porous material. POLYM ENG SCI 2022. [DOI: 10.1002/pen.26168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Rajan Kumar
- Polymer Research Centre (PRC), Centre for Advanced Functional Materials (CAFM), Department of Chemical Sciences Indian Institute of Science Education and Research Kolkata (IISER K) Mohanpur West Bengal India
- Department of Chemistry, Royal School of Applied and Pure Sciences (RSAPS) The Assam Royal Global University Guwahati Assam India
| | - Pawan Kumar
- Polymer Research Centre (PRC), Centre for Advanced Functional Materials (CAFM), Department of Chemical Sciences Indian Institute of Science Education and Research Kolkata (IISER K) Mohanpur West Bengal India
| | - Swati Panigrahi
- Polymer Research Centre (PRC), Centre for Advanced Functional Materials (CAFM), Department of Chemical Sciences Indian Institute of Science Education and Research Kolkata (IISER K) Mohanpur West Bengal India
| | - Narayanan Lakshminarasimhan
- Electro‐organic and Materials Electrochemistry Division CSIR‐Central Electrochemical Research Institute (CECRI) Karaikudi Tamil Nadu India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad India
| | - Raja Shunmugam
- Polymer Research Centre (PRC), Centre for Advanced Functional Materials (CAFM), Department of Chemical Sciences Indian Institute of Science Education and Research Kolkata (IISER K) Mohanpur West Bengal India
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5
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Wang H, Xu J, Wang H, Yang S, Wang H. Mechanically robust and self‐healing waterborne polyurethane nanocomposites based on inorganic organic hybrid materials and reversible covalent interaction. POLYM ENG SCI 2022. [DOI: 10.1002/pen.25877] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Hui Wang
- College of Biomass Science and Engineering Sichuan University Chengdu China
| | - Junhuai Xu
- College of Biomass Science and Engineering Sichuan University Chengdu China
| | - Haoliang Wang
- College of Biomass Science and Engineering Sichuan University Chengdu China
- College of Materials Science and Engineering, State Key Laboratory of New Textile Materials &Advanced Processing Technology Wuhan Textile University Wuhan China
| | - Shiwen Yang
- College of Materials Science and Engineering, State Key Laboratory of New Textile Materials &Advanced Processing Technology Wuhan Textile University Wuhan China
| | - Haibo Wang
- College of Biomass Science and Engineering Sichuan University Chengdu China
- Key Laboratory of Leather Chemistry and Engineering Ministry of Education Sichuan University Chengdu China
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Sarabiyan Nejad S, Razzaghi D, Rezaei M, Bagheri M, Babaie A, Abbasi F. Preparation and characterization of electrospun shape memory polyurethane/graphene quantum dot nanocomposite scaffolds for tissue engineering. INT J POLYM MATER PO 2021. [DOI: 10.1080/00914037.2021.1941954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Sanaz Sarabiyan Nejad
- Chemistry Department, Science Faculty, Azarbaijan Shahid Madani University, Tabriz, Iran
| | - Donya Razzaghi
- Faculty of Polymer Engineering, Institute of Polymeric Materials, Sahand University of Technology, Tabriz, Iran
| | - Mostafa Rezaei
- Faculty of Polymer Engineering, Institute of Polymeric Materials, Sahand University of Technology, Tabriz, Iran
| | - Massuomeh Bagheri
- Chemistry Department, Science Faculty, Azarbaijan Shahid Madani University, Tabriz, Iran
| | - Amin Babaie
- Faculty of Polymer Engineering, Institute of Polymeric Materials, Sahand University of Technology, Tabriz, Iran
| | - Farhang Abbasi
- Faculty of Polymer Engineering, Institute of Polymeric Materials, Sahand University of Technology, Tabriz, Iran
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Lin X, Chen Y, Jiang J, Li J, Jiang Y, Zhang H, Liu H. Polyurethane/n-octadecane@silicon dioxide-polyhydroxyethyl methacrylate form-stable phase change materials with enhanced mechanical properties and thermal energy storage. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-021-03677-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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8
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Ehteramian M, Ghasemi I, Azizi H, Karrabi M. Functionalization of multi-walled carbon nanotube and its effect on shape memory behavior of nanocomposite based on thermoplastic polyurethane/polyvinyl chloride/multi-walled carbon nanotube (TPU/PVC/MWCNT). IRANIAN POLYMER JOURNAL 2021. [DOI: 10.1007/s13726-021-00900-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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9
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Cabello-Alvarado C, Andrade-Guel M, Ávila-Orta CA, Gamero-Melo P, Reyes-Rodríguez PY, Quiñones-Jurado ZV, Cadenas-Pliego G, Bartolo-Pérez P, Soriano-Corral F, Covarrubias-Gordillo C. Composites based on nylon 6/clinoptilolite by ultrasound-assisted extrusion for enhanced flame retardant and mechanical properties. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-021-03582-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Qu C, Tang Y, Wang D, Fan X, Li H, Liu C, Su K, Zhao D, Jing J, Zhang X. Improved processability of
PA66‐polyimide
copolymers with different polyimide contents. J Appl Polym Sci 2021. [DOI: 10.1002/app.49640] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Chunyan Qu
- Institute of Petrochemistry Heilongjiang Academy of Science Harbin China
| | - Yao Tang
- Institute of Petrochemistry Heilongjiang Academy of Science Harbin China
| | - Dezhi Wang
- Institute of Petrochemistry Heilongjiang Academy of Science Harbin China
| | - XuPeng Fan
- School of Materials Science and Engineering Harbin University of Science and Technology Harbin China
| | - Hongfeng Li
- Institute of Petrochemistry Heilongjiang Academy of Science Harbin China
| | - Changwei Liu
- Institute of Petrochemistry Heilongjiang Academy of Science Harbin China
| | - Kai Su
- Institute of Petrochemistry Heilongjiang Academy of Science Harbin China
| | - Daoxiang Zhao
- Institute of Petrochemistry Heilongjiang Academy of Science Harbin China
| | - Jiaqi Jing
- School of Materials Science and Engineering Harbin University of Science and Technology Harbin China
| | - Xiao Zhang
- Institute of Petrochemistry Heilongjiang Academy of Science Harbin China
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11
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Razavizadeh BM, Niazmand R. Characterization of polyamide-6/ propolis blended electrospun fibers. Heliyon 2020; 6:e04784. [PMID: 32923722 PMCID: PMC7475131 DOI: 10.1016/j.heliyon.2020.e04784] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 07/21/2020] [Accepted: 08/20/2020] [Indexed: 11/26/2022] Open
Abstract
Polyamide-6 (PA-6) nanofibers and PA-6/propolis ethanolic extract (EEP) blended fibers were prepared having electrospun their solutions in formic acid as solvent. The effect of concentrations of PA-6 and also EEP in polymer solutions on the morphology and physicochemical characteristics of their electrospun fibers was investigated. The analysis of FESEM images showed the mean diameter of fibers increased from 487- 682 nm with increasing PA-6 concentration in the range of 25-40 % w/v. While, increasing EEP concentration (20-50% (w/w)) in PA-6/EEP system caused the increasing fiber mean diameters from 943- 1773 nm. Partially high aspect ratio nanofibers were observed only in the PA-6 systems. Antioxidant activity of the fibers enhanced with increasing EEP concentration in the fiber mats. FTIR spectrums and thermal properties of electrospun fibers exhibited the simple mixtures of PA-6 and EEP in blend fibers which did not contain very complex interactions.
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Affiliation(s)
- Bibi Marzieh Razavizadeh
- Research Institute of Food Science and Technology, Department of Food Safety and Quality Control, Mashhad, Iran
| | - Razieh Niazmand
- Research Institute of Food Science and Technology, Department of Food Chemistry, Mashhad, Iran
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12
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Mathew A, Mathew B, Koshy EP. Polystyrene supported bromoderivative of 2-oxazolidone – an efficient reagent for microwave assisted bromination reactions. JOURNAL OF POLYMER RESEARCH 2020. [DOI: 10.1007/s10965-020-02251-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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13
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Mutalib TNABTA, Tan SJ, Foo KL, Liew YM, Heah CY, Abdullah MMAB. Properties of polyaniline/graphene oxide (PANI/GO) composites: effect of GO loading. Polym Bull (Berl) 2020. [DOI: 10.1007/s00289-020-03334-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Wadatkar NS, Waghuley SA. Electrical investigation on thiophene–indole conducting copolymers as-synthesized through in situ chemical copolymerization route. Polym Bull (Berl) 2020. [DOI: 10.1007/s00289-019-02967-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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15
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Lakhan MN, Chen R, Shar AH, Chand K, Shah AH, Ahmed M, Ali I, Ahmed R, Liu J, Takahashi K, Wang J. Eco-friendly green synthesis of clove buds extract functionalized silver nanoparticles and evaluation of antibacterial and antidiatom activity. J Microbiol Methods 2020; 173:105934. [PMID: 32325159 DOI: 10.1016/j.mimet.2020.105934] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 04/19/2020] [Accepted: 04/19/2020] [Indexed: 01/31/2023]
Abstract
Biological fouling has caused a lot of concern in marine industries due to the attachment of microorganisms on marine surfaces. Silver nanoparticles (AgNPs) have a great potential to inhibit and hold strong toxicity against microorganisms on artificial surfaces immersed in seawater. In this study, AgNPs are synthesized using extract of clove buds (CE) plant as a reducing and stabilizing agent by biological synthesis method. The obtained CE-AgNPs product was characterized by using different techniques. Ultraviolet-visible spectroscopy (UV-Vis) results confirmed the formation of CE-AgNPs with its surface plasmon resonance peak range. Fourier-transform infrared spectroscopy (FTIR) study showed the formation of functional groups responsible for the reduction of Ag+ into Ago. X-Ray Diffraction (XRD) results revealed face-centered cubic (fcc) silver crystals having four different diffraction peaks at 38.08, 44.21, 64.42 and 77.32 with corresponding lattice plane value recorded at (111), (200), (220) and (311), respectively. Structural characterization using scanning electron microscopy equipped with energy dispersive X-Ray Analyzer (SEM-EDX), Transmission electron microscopy (TEM) and atomic force microscopy (AFM) also confirmed the successful formation of CE-AgNPs with fcc structure. The histogram of particle size distribution through TEM image showed an average size of 9.42 nm of the synthesized product. Finally, the antibacterial and antidiatom activity of the synthesized product was analyzed. The CE-AgNPs synthesized using CE possesses good inhibitory activity against the marine bacterium community and Nitzschia closterium diatom. These results indicate that CE-AgNPs can be used as a novel material for antibacterial and antidiatoms means to inhibit the biofouling on marine surfaces.
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Affiliation(s)
- Muhammad Nazim Lakhan
- Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, PR China
| | - Rongrong Chen
- Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, PR China.
| | - Altaf Hussain Shar
- Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, PR China
| | - Kishore Chand
- Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, PR China
| | - Ahmer Hussain Shah
- Department of Textile Engineering, Balochistan University of Information Technology, Engineering and Management Science, Quetta, Pakistan
| | - Mukhtiar Ahmed
- Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, PR China
| | - Irfan Ali
- College of Chemical Engineering, Beijing University of Chemical Technology, PR China
| | - Rizwan Ahmed
- School of Chemical Engineering, Dalian University of Technology, PR China
| | - Jingyuan Liu
- Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, PR China
| | - Kazunobu Takahashi
- Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, PR China
| | - Jun Wang
- Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, PR China.
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Evaluating Nanoparticles Decorated on Fe3O4@SiO2-Schiff Base (Fe3O4@SiO2-APTMS-HBA) in Adsorption of Ciprofloxacin from Aqueous Environments. J Inorg Organomet Polym Mater 2020. [DOI: 10.1007/s10904-020-01499-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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17
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Khan M, Shah LA, Rehman T, Khan A, Iqbal A, Ullah M, Alam S. Synthesis of physically cross-linked gum Arabic-based polymer hydrogels with enhanced mechanical, load bearing and shape memory behavior. IRANIAN POLYMER JOURNAL 2020. [DOI: 10.1007/s13726-020-00801-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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18
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Wu K, Wu Y, Huang S, Chen Z, Wang H, Shang Y, Li S. Synthesis and characterization of hydroxyl-terminated butadiene-end-capped polyisobutylene and its use as a diol for polyurethane preparation. RSC Adv 2020; 10:9601-9609. [PMID: 35497236 PMCID: PMC9050137 DOI: 10.1039/d0ra00132e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 02/16/2020] [Indexed: 11/21/2022] Open
Abstract
Hydroxyl-terminated telechelic polyisobutylene (PIB) was prepared through living cationic polymerization. A living PIB chain was formed using the t-Bu-m-DiCuOMe/TiCl4 initiating system and then capped with 1,3-butadiene (BD) to prepare chlorine-terminated telechelic PIB. The chlorine-terminated telechelic PIB was then hydrolysed with tetrabutylammonium hydroxide to form hydroxyl-terminated PIB. Nuclear magnetic resonance spectroscopy confirmed hydrolysis completion. The hydroxyl-terminated PIB was subsequently used as a diol to react with 4,4-methylenebis(phenylisocyanate) (MDI) and produce a PIB-based polyurethane, which showed stronger acid resistance, hydrolysis stability and thermal oxidation stability than a commercial polyurethane.
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Affiliation(s)
- Kangda Wu
- Beijing Key Lab of Special Elastomeric Composite Materials, Department of Materials Science and Engineering, Beijing Institute of Petrochemical Technology Beijing 102617 China .,Beijing Key Lab of Special Elastomeric Composite Materials Beijing 102617 China
| | - Yibo Wu
- Beijing Key Lab of Special Elastomeric Composite Materials, Department of Materials Science and Engineering, Beijing Institute of Petrochemical Technology Beijing 102617 China .,Beijing Key Lab of Special Elastomeric Composite Materials Beijing 102617 China
| | - Shan Huang
- College of Material Science and Engineering, Beijing University of Chemical Technology Beijing 100029 China .,Beijing Key Lab of Special Elastomeric Composite Materials Beijing 102617 China
| | - Zhifei Chen
- College of Material Science and Engineering, Beijing University of Chemical Technology Beijing 100029 China .,Beijing Key Lab of Special Elastomeric Composite Materials Beijing 102617 China
| | - Hao Wang
- Beijing Key Lab of Special Elastomeric Composite Materials, Department of Materials Science and Engineering, Beijing Institute of Petrochemical Technology Beijing 102617 China .,Beijing Key Lab of Special Elastomeric Composite Materials Beijing 102617 China
| | - Yuwei Shang
- Beijing Key Lab of Special Elastomeric Composite Materials, Department of Materials Science and Engineering, Beijing Institute of Petrochemical Technology Beijing 102617 China .,Beijing Key Lab of Special Elastomeric Composite Materials Beijing 102617 China
| | - Shuxin Li
- Beijing Key Lab of Special Elastomeric Composite Materials, Department of Materials Science and Engineering, Beijing Institute of Petrochemical Technology Beijing 102617 China .,Beijing Key Lab of Special Elastomeric Composite Materials Beijing 102617 China
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Catalytic microgelators for decoupled control of gelation rate and rigidity of the biological gels. J Control Release 2020; 317:166-180. [DOI: 10.1016/j.jconrel.2019.10.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 10/07/2019] [Accepted: 10/15/2019] [Indexed: 11/23/2022]
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20
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Ferromagnetic xyloglucan–Fe3O4 green nanocomposites: sonochemical synthesis, characterization and application in removal of methylene blue from water. ACTA ACUST UNITED AC 2019. [DOI: 10.1007/s42398-019-00091-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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21
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Xiao X, Li C, Lai H, He Y, Jiang T, Shi N, Li W. Drumlike p-methylphenyltin carboxylates: The synthesis, characterization, antitumor activities and fluorescence. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.04.047] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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Surfactant-based modification of sodic-Algerian illite clay for the preparation of polymeric membranes: application for separation of iron and zinc ions from aqueous solutions. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-018-2568-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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23
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Thermal degradation kinetic, electrical and dielectric behavior of brush copolymer with a polystyrene backbone and polyacrylate-amide side chains/ nanographene-filled composites. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.03.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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24
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Hwang T, Kim J, Joshi MK, Park CH, Kim CS. Simultaneous regeneration of calcium lactate and cellulose into PCL nanofiber for biomedical application. Carbohydr Polym 2019; 212:21-29. [DOI: 10.1016/j.carbpol.2019.01.085] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 01/07/2019] [Accepted: 01/24/2019] [Indexed: 01/12/2023]
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Moses Phiri M, Wingrove Mulder D, Mason S, Christiaan Vorster B. Facile immobilization of glucose oxidase onto gold nanostars with enhanced binding affinity and optimal function. ROYAL SOCIETY OPEN SCIENCE 2019; 6:190205. [PMID: 31218060 PMCID: PMC6549951 DOI: 10.1098/rsos.190205] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 04/05/2019] [Indexed: 05/11/2023]
Abstract
Gold nanoparticles provide a user-friendly and efficient surface for immobilization of enzymes and proteins. In this paper, we present a novel approach for enzyme bioconjugation to gold nanostars (AuNSs). AuNSs were modified with l-cysteine (Cys) and covalently bound to N-hydroxysulfosuccinimide (sulfo-NHS) activated intermediate glucose oxidase (GOx) to fabricate a stable and sensitive AuNSs-Cys-GOx bioconjugate complex. Such a strategy has the potential for increased attachment affinity without protein adsorption onto the AuNSs surface. Good dispersity in buffer suspension was observed, as well as stability in high ionic environments. Using the AuNSs-Cys-GOx bioconjugates showed greater sensitivity in the measuring of low concentrations of glucose based on plasmonic and colorimetric detection. Such a novel approach for enzyme immobilization can lead to AuNSs-Cys-GOx bioconjugate complexes that can be used as catalytic nanodevices in nanobiosensors based on oxidases in biomedical applications.
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Affiliation(s)
- Masauso Moses Phiri
- Centre for Human Metabolomics, North-West University, Potchefstroom Campus, Private Bag X6001, Potchefstroom, South Africa
| | | | | | - Barend Christiaan Vorster
- Centre for Human Metabolomics, North-West University, Potchefstroom Campus, Private Bag X6001, Potchefstroom, South Africa
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26
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Hamedani YP, Hekmati M. Green biosynthesis of silver nanoparticles decorated on multi-walled carbon nanotubes using the extract of Pistacia atlantica leaves as a recyclable heterogeneous nanocatalyst for degradation of organic dyes in water. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.02.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Azman NAN, Islam MR, Parimalam M, Rashidi NM, Mupit M. Mechanical, structural, thermal and morphological properties of epoxy composites filled with chicken eggshell and inorganic CaCO3 particles. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-02779-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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28
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Zhou G, Ding J, Sun J, Wang Y. Preparation and performance of a composite gel as a dust suppressant for coal transportation and storage. J Appl Polym Sci 2019. [DOI: 10.1002/app.47819] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Gang Zhou
- College of Mining and Safety EngineeringShandong University of Science and Technology Qingdao 266590 China
- State Key Laboratory of Mining Disaster Prevention and Control Co‐founded by Shandong Province and the Ministry of Science and TechnologyShandong University of Science and Technology Qingdao 266590 China
- Energy FlagshipCommonwealth Scientific and Industrial Research Organisation P.O. Box 883, Kenmore, Brisbane QLD 4069 Australia
| | - Jianfei Ding
- College of Mining and Safety EngineeringShandong University of Science and Technology Qingdao 266590 China
- State Key Laboratory of Mining Disaster Prevention and Control Co‐founded by Shandong Province and the Ministry of Science and TechnologyShandong University of Science and Technology Qingdao 266590 China
| | - Jian Sun
- College of Mining and Safety EngineeringShandong University of Science and Technology Qingdao 266590 China
- State Key Laboratory of Mining Disaster Prevention and Control Co‐founded by Shandong Province and the Ministry of Science and TechnologyShandong University of Science and Technology Qingdao 266590 China
| | - Yuying Wang
- College of Mining and Safety EngineeringShandong University of Science and Technology Qingdao 266590 China
- State Key Laboratory of Mining Disaster Prevention and Control Co‐founded by Shandong Province and the Ministry of Science and TechnologyShandong University of Science and Technology Qingdao 266590 China
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The Application of Halloysite Nanotubes/Fe3O4 Composites Nanoparticles in Polyvinylidene Fluoride Membranes for Dye Solution Removal. J Inorg Organomet Polym Mater 2019. [DOI: 10.1007/s10904-019-01125-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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30
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Mohy Eldin MS, Abdel Rahman S, El Fawal GF. Novel immobilized Cu2+-aminated poly (methyl methacrylate) grafted cellophane membranes for affinity separation of His-Tag chitinase. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-02743-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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31
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Xue X, Jiang K, Yin Q, Zhang X, Zhang W, Jia H, Ji Q. Tailoring the structure of Kevlar nanofiber and its effects on the mechanical property and thermal stability of carboxylated acrylonitrile butadiene rubber. J Appl Polym Sci 2019. [DOI: 10.1002/app.47698] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xiaodong Xue
- Key Laboratory for Soft Chemistry and Functional Materials of Ministry of EducationNanjing University of Science and Technology Nanjing 210094 China
| | - Kuan Jiang
- Key Laboratory for Soft Chemistry and Functional Materials of Ministry of EducationNanjing University of Science and Technology Nanjing 210094 China
| | - Qing Yin
- Key Laboratory for Soft Chemistry and Functional Materials of Ministry of EducationNanjing University of Science and Technology Nanjing 210094 China
| | - Xumin Zhang
- Key Laboratory for Soft Chemistry and Functional Materials of Ministry of EducationNanjing University of Science and Technology Nanjing 210094 China
| | - Wanqi Zhang
- Key Laboratory for Soft Chemistry and Functional Materials of Ministry of EducationNanjing University of Science and Technology Nanjing 210094 China
| | - Hongbing Jia
- Key Laboratory for Soft Chemistry and Functional Materials of Ministry of EducationNanjing University of Science and Technology Nanjing 210094 China
| | - Qingmin Ji
- Herbert Gleiter Institute of NanoscienceNanjing University of Science and Technology Nanjing 210094 China
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Dong L, Xiong Z, Liu X, Sheng D, Zhou Y, Yang Y. Synthesis of carbon quantum dots to fabricate ultraviolet‐shielding poly(vinylidene fluoride) films. J Appl Polym Sci 2019. [DOI: 10.1002/app.47555] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Li Dong
- Changchun Institute of Applied ChemistryChinese Academy of Sciences Changchun 130022 China
- University of Science and Technology of China Hefei 230026 China
| | - Zhengrong Xiong
- Changchun Institute of Applied ChemistryChinese Academy of Sciences Changchun 130022 China
| | - Xiangdong Liu
- Changchun Institute of Applied ChemistryChinese Academy of Sciences Changchun 130022 China
| | - Dekun Sheng
- Changchun Institute of Applied ChemistryChinese Academy of Sciences Changchun 130022 China
| | - Yan Zhou
- Changchun Institute of Applied ChemistryChinese Academy of Sciences Changchun 130022 China
- University of Science and Technology of China Hefei 230026 China
| | - Yuming Yang
- Changchun Institute of Applied ChemistryChinese Academy of Sciences Changchun 130022 China
- University of Science and Technology of China Hefei 230026 China
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Qi X, Wang W, Zhang J, Yan C, Zhu Y, Zhang F. Aqueously soluble semi‐aromatic copolyamides with dual‐functional groups as sizing agent. J Appl Polym Sci 2019. [DOI: 10.1002/app.47132] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- X. Qi
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationCollege of Chemistry and Molecular Engineering, Peking University Beijing 100871 China
| | - W. Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationCollege of Chemistry and Molecular Engineering, Peking University Beijing 100871 China
| | - J. Zhang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationCollege of Chemistry and Molecular Engineering, Peking University Beijing 100871 China
| | - C. Yan
- Zhejiang Provincial Key Laboratory of Robotics and Intelligent Manufacturing Equipment TechnologyNingbo Institute of Material Technology and Engineering, Chinese Academy of Sciences Ningbo 100871 China
| | - Y. Zhu
- Zhejiang Provincial Key Laboratory of Robotics and Intelligent Manufacturing Equipment TechnologyNingbo Institute of Material Technology and Engineering, Chinese Academy of Sciences Ningbo 100871 China
| | - F. Zhang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationCollege of Chemistry and Molecular Engineering, Peking University Beijing 100871 China
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Pandey G, Morla S, Nemade HB, Kumar S, Ramakrishnan V. Modulation of aggregation with an electric field; scientific roadmap for a potential non-invasive therapy against tauopathies. RSC Adv 2019; 9:4744-4750. [PMID: 35514655 PMCID: PMC9060620 DOI: 10.1039/c8ra09993f] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 01/22/2019] [Indexed: 11/21/2022] Open
Abstract
Toxic aggregation of tau protein to neurofibrillary tangles (NFTS) is a central pathological event involved in tauopathies. Inhibition of tau protein aggregation can serve as a straightforward therapeutic strategy. However, tau-based therapeutic solutions are not very common. Phenothiazine methylene blue (tau protein inhibitor) is currently the only drug under phase III clinical trials. In this work, a non-invasive strategy is presented for modulating the aggregation of core peptide segments of tau protein (VQIVYK and VQIINK) by using electric fields of varying strengths. We use thioflavin T staining, tyrosine fluorescence assay, electron microscopy, IR, dynamic and static light scattering, and neuronal toxicity estimation, for verifying the effect of electric field on the aggregation kinetics, morphology, conformational state and cellular toxicity of peptide systems. Our observations suggest that electric field arrests the self-assembly of VQIVYK and VQIINK fibrils thereby reducing the neurotoxicity instigated by them. Based on our observations, we propose a prospective scheme for a futuristic non-invasive therapeutic device.
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Affiliation(s)
- Gaurav Pandey
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati Guwahati-781039 India +91 361 258 2249 +91 361 258 2227
| | - Sudhir Morla
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati Guwahati-781039 India +91 361 258 2249 +91 361 258 2227
| | - Harshal B Nemade
- Department of Electronics and Electrical Engineering, Indian Institute of Technology Guwahati Guwahati-781039 India
| | - Sachin Kumar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati Guwahati-781039 India +91 361 258 2249 +91 361 258 2227
| | - Vibin Ramakrishnan
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati Guwahati-781039 India +91 361 258 2249 +91 361 258 2227
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Jafar Mazumder MA. Synthesis, characterization and electrochemical analysis of cysteine modified polymers for corrosion inhibition of mild steel in aqueous 1 M HCl. RSC Adv 2019; 9:4277-4294. [PMID: 35520193 PMCID: PMC9060476 DOI: 10.1039/c8ra09833f] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 02/19/2019] [Accepted: 01/18/2019] [Indexed: 12/02/2022] Open
Abstract
Butler's cyclopolymerization protocol was used to synthesize homo and copolymers of cysteine residues and diallyldimethylammonium chloride (DADMAC) using water as a solvent and excellent yields were obtained. The structural composition of the polymers was determined using nuclear magnetic resonance (NMR) and Fourier-transform infrared (FT-IR) spectroscopies. The thermal stability of the synthesized polymers was determined using thermogravimetric analysis (TGA). The corrosion efficiencies and adsorption characteristics of these polymers on mild steel were evaluated using gravimetric weight loss and potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS). The copolymers of cysteine residues and DADMAC exhibited excellent inhibition efficiencies in arresting mild steel corrosion in 1 M hydrochloric acid (HCl) at 60 °C. The best fitted Langmuir, Temkin and Freundlich adsorption isotherms suggested that the adsorption process occurs through chemisorption and physisorption. The surface morphology of mild steel in the presence or absence of polymers was determined using atomic force microscopy (AFM), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS). This systematic study might provide a way to design new inhibitor compounds that could be beneficial in the field of biomedical science as well as for anti-corrosion applications. Mild steel framework embedded in corrosion inhibiting structural motifs.![]()
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36
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Rivas MV, Petroselli G, Erra-Balsells R, Varela O, Kolender AA. Synthesis, characterization and chemical degradation of poly(ester-triazole)s derived from d-galactose. RSC Adv 2019; 9:9860-9869. [PMID: 35520726 PMCID: PMC9062189 DOI: 10.1039/c9ra00398c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 03/21/2019] [Indexed: 11/25/2022] Open
Abstract
α-Azide-ω-alkynyl ester monomers were designed and synthesized in order to obtain hydrolytically degradable polymers. The monomers were prepared from d-galactose, as a renewable resource. Environmentally benign azido–alkyne cycloaddition polymerizations were conducted to afford poly(ester-triazole)s, with complete atom economy. Although polymer formation prevailed under optimized polymerization conditions, variable proportions of cyclic oligomer byproducts were detected. The Cu-catalyzed click polymerization led regioselectively to 1,4-disubstituted triazole linkages, while the thermal, metal-free polymerization produced a random distribution of 1,4- and 1,5-disubstituted triazoles in the polymer backbone. The poly(ester-triazole)s exhibited high molecular weights (Mw in the range 35–85 kDa). They were soluble in organic solvents but highly insoluble in water, thus removal of the Cu(i) catalyst was simplified. The polymers were stable up to 300 °C, and had Tg values in the range 90–100 °C. The materials were hydrolysed under either basic or strong acid conditions, and the degradation products have been characterized. Carbohydrate-derived poly(ester-triazoles), soluble in organic solvents and degradable in aqueous media, have been synthesized by CuAAC or thermal polymerization.![]()
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Affiliation(s)
- M. Verónica Rivas
- Universidad de Buenos Aires
- Facultad Ciencias Exactas y Naturales
- Departamento de Química Orgánica
- Ciudad Universitaria
- Buenos Aires
| | - Gabriela Petroselli
- Universidad de Buenos Aires
- Facultad Ciencias Exactas y Naturales
- Departamento de Química Orgánica
- Ciudad Universitaria
- Buenos Aires
| | - Rosa Erra-Balsells
- Universidad de Buenos Aires
- Facultad Ciencias Exactas y Naturales
- Departamento de Química Orgánica
- Ciudad Universitaria
- Buenos Aires
| | - Oscar Varela
- Universidad de Buenos Aires
- Facultad Ciencias Exactas y Naturales
- Departamento de Química Orgánica
- Ciudad Universitaria
- Buenos Aires
| | - Adriana A. Kolender
- Universidad de Buenos Aires
- Facultad Ciencias Exactas y Naturales
- Departamento de Química Orgánica
- Ciudad Universitaria
- Buenos Aires
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37
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Lett JA, Sundareswari M, Ravichandran K, Latha MB, Sagadevan S, Bin Johan MR. Tailoring the morphological features of sol–gel synthesized mesoporous hydroxyapatite using fatty acids as an organic modifier. RSC Adv 2019; 9:6228-6240. [PMID: 35517282 PMCID: PMC9060915 DOI: 10.1039/c9ra00051h] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 02/05/2019] [Indexed: 11/21/2022] Open
Abstract
Nowadays, owing to their large surface area, enhanced pore volume, increased porosity, and variable pore size, mesoporous materials, such as mesoporous silica and mesoporous carbon, have attracted significant attention in the areas of physical science and biomedical sciences. Due to their compositional and biological similarities to natural tissues, synthetic nanoscaled mesoporous hydroxyapatite (MPHA) nanoparticles possess good biocompatibility, bioactivity, and osteoconductivity and have recently expanded their applicability in a wide range of fields such as in tissue replacement, drug/gene delivery carriers, and biocompatible coatings. In this study, we defined a novel route to synthesize mesoporous hydroxyapatite nanoparticles by the sol–gel method in the presence of stearic acid (SA), a biocompatible medium chain fatty acid that would function as an organic modifier. The as-prepared HAP particles were subjected to structural, functional and morphological characterization. Mesopores in HAP were observed for samples synthesized at pH 11 by removing the organic template. The porosity of HAP was confirmed by the Brunauer–Emmett–Teller (BET) analysis. The apatite deposition phenomenon in simulated body fluid at pH 7.4 confirms their in vitro bioactivity, and based on the in vitro cytotoxicity examined using Vero cell cultures, the as-prepared HAP particles exhibit excellent cytocompatibility and cell viability as high as 83% at an extract concentration as low as 25%. Moreover, the loading and leaching behavior of the drug in mesoporous HAP was studied using methionine (MT), an essential amino acid. These results confirm that nano mesoporous hydroxyapatite loaded with MT can be a potential aspirant as a biomaterial in biomedical applications. Nowadays, owing to their large surface area, enhanced pore volume, increased porosity, and variable pore size, mesoporous materials, such as mesoporous silica and mesoporous carbon, have attracted significant attention in the areas of physical science and biomedical sciences.![]()
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Affiliation(s)
- J. Anita Lett
- Department of Physics
- Sathyabama Institute of Science and Technology
- Chennai-600119
- India
| | - M. Sundareswari
- Department of Physics
- Sathyabama Institute of Science and Technology
- Chennai-600119
- India
| | - K. Ravichandran
- Department of Analytical Chemistry
- University of Madras
- Chennai-600025
- India
| | - M. Bavani Latha
- Department of Biotechnology
- Sathyabama Institute of Science and Technology
- Chennai-600119
- India
| | - Suresh Sagadevan
- Nanotechnology & Catalysis Research Centre
- University of Malaya
- Kuala Lumpur 50603
- Malaysia
| | - Mohd. Rafie Bin Johan
- Nanotechnology & Catalysis Research Centre
- University of Malaya
- Kuala Lumpur 50603
- Malaysia
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Borrero-López A, Valencia C, Franco J. Rheology of lignin-based chemical oleogels prepared using diisocyanate crosslinkers: Effect of the diisocyanate and curing kinetics. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.02.020] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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39
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Kaya İ, Avcı A, Temizkan K. Photophysical and thermal properties of polyazomethines containing various flexible units. Macromol Res 2016. [DOI: 10.1007/s13233-017-5002-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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40
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Behniafar H, Yazdi M. PTMG-Modified MWCNT/PTMG-based polyurethane nanocomposites: Strong interaction and homogeneous dispersion. POLYMER SCIENCE SERIES B 2016. [DOI: 10.1134/s1560090416060038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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41
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Radiation Crosslinking of Polyurethanes: Characterization by FTIR, TGA, SEM, XRD, and Raman Spectroscopy. ACTA ACUST UNITED AC 2016. [DOI: 10.1155/2016/9802514] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Gamma radiation can be used for enhancing the physical properties of polyurethane (PU). Radiation was used to crosslink a polyurethane at room temperature; four samples of the PU solid film are irradiated at variable four radiation doses 0, 50, 100, and 150 kGy under vacuum conditions. Crosslinking radiation is more common than oxidative degradation and crosslinking is believed to be more efficient in the soft segment of PU. The structure of the PUs is performed by Fourier transform infrared (FTIR-ATR), Thermogravimetric Analysis (TGA-DTG), and X-ray Diffraction (XRD) which have been used to investigate the effect of gamma radiation on the polyurethane (PU). The results showed that the radiation crosslinking of polyurethanes improved the thermal stability and the crystallinity. The microstructure modifications of polyurethane samples have also been studied as a function of the dose using the scanning electron microscope (SEM). The effects of gamma irradiation on the color changes of polyurethane were observed. The irradiated PUs have conjugated structure and are capable of emitting purple fluorescence.
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Syntheses, structures and photoluminescent properties of Zn(Ⅱ)/Co(Ⅱ) coordination polymers based on flexible tetracarboxylate ligand of 5,5′-(butane-1,4-diyl)-bis(oxy)-di isophthalic acid. J SOLID STATE CHEM 2016. [DOI: 10.1016/j.jssc.2016.05.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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43
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Madhukar BS, Gowda DGB, Madhukar BS, Siddaramaiah, Somashekar R. Evaluation of Mechanical, Thermal, and Morphological Behaviors of Polyurethane/Mahua Seed Cake Green Composite. ADVANCES IN POLYMER TECHNOLOGY 2015. [DOI: 10.1002/adv.21598] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- B. S. Madhukar
- Department of Chemistry; Yuvaraj's College; University of Mysore; Mysore 570 006 India
| | - D. G. Bhadre Gowda
- Department of Chemistry; Yuvaraj's College; University of Mysore; Mysore 570 006 India
| | - B. S. Madhukar
- Department of Polymer Science and Technology; Sri Jayachamarajendra College of Engineering; Mysore 570 006 India
| | - Siddaramaiah
- Department of Polymer Science and Technology; Sri Jayachamarajendra College of Engineering; Mysore 570 006 India
| | - R. Somashekar
- Department of Studies in Physics; University of Mysore; Mysore 570 006 India
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44
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Fluorescence, thermal and electrochemical properties of poly(azomethine-urethane)s containing sulfone group. Polym Bull (Berl) 2015. [DOI: 10.1007/s00289-015-1441-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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45
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Wang S, Wu B, Liu F, Gao Y, Zhang W. A well-defined alternating copolymer based on a salicylaldimine Schiff base for highly sensitive zinc(ii) detection and pH sensing in aqueous solution. Polym Chem 2015. [DOI: 10.1039/c4py01298d] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a new strategy to fabricate well-defined alternating Schiff base copolymers of poly(VBCDEG-alt-SaAEMI)s which display two distinguishable color fluorescence “OFF–ON” responses to zinc ions and pH in aqueous solution.
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Affiliation(s)
- Shangfeng Wang
- Shanghai Key Laboratory of Advanced Polymeric Materials
- College of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Bin Wu
- Shanghai Key Laboratory of Advanced Polymeric Materials
- College of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Feng Liu
- Shanghai Key Laboratory of Advanced Polymeric Materials
- College of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Yun Gao
- Shanghai Key Laboratory of Advanced Polymeric Materials
- College of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Weian Zhang
- Shanghai Key Laboratory of Advanced Polymeric Materials
- College of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
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Antibacterial Activity of Green Synthesis of Iron Nanoparticles UsingLawsonia inermisandGardenia jasminoidesLeaves Extract. J CHEM-NY 2015. [DOI: 10.1155/2015/912342] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Recently, development of reliable experimental protocols for synthesis of metal nanoparticles with desired morphologies and sizes has become a major focus of researchers. Green synthesis of metallic nanoparticles has accumulated an ultimate interest over the last decade due to their distinctive properties that make them applicable in various fields of science and technology. Metal nanoparticles that are synthesized by using plants have emerged as nontoxic and ecofriendly. In this study a very cheap and simple conventional heating method was used to obtain the iron nanoparticles (FeNPs) using the leaves extract ofLawsonia inermisandGardenia jasminoidesplant. The iron nanoparticles were characterized by thermal gravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), scanning electron microscopy (SEM), atomic force microscopy (AFM), and X-ray diffraction (XRD). The antibacterial activity was studied againstEscherichia coli,Salmonella enterica,Proteus mirabilis, andStaphylococcus aureusby using well-diffusion method.
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Kaya İ, Avcı A, Temizkan K. Synthesis of thermally stable and low band gap poly(azomethine-urethane)s containing fluorene unit in the backbone. KOREAN J CHEM ENG 2014. [DOI: 10.1007/s11814-014-0252-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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48
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Chethana M, Prashantha K, Siddaramaiah. Studies on thermal behavior, moisture absorption, and biodegradability of ginger spent incorporated polyurethane green composites. J Appl Polym Sci 2014. [DOI: 10.1002/app.41614] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- M. Chethana
- Department of Polymer Science and Technology; JSS Research Foundation; Mysore 570 006 Karnataka India
- Department of Polymer Science and Technology; Sri Jayachamarajendra College of Engineering; Mysore 570 006 Karnataka India
| | - Kalappa Prashantha
- Department of Polymers and Composites Technology & Mechanical Engineering; Mines Douai, BP 10838 F-59508 Douai France
| | - Siddaramaiah
- Department of Polymer Science and Technology; Sri Jayachamarajendra College of Engineering; Mysore 570 006 Karnataka India
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