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Abdel-Hamed MO, Draz AA, Khalaf M, El-Hossary FM, Mohamed HFM, Abdel-Hady EE. Effect of Plasma pretreatment and Graphene oxide ratios on the transport properties of PVA/PVP membranes for fuel cells. Sci Rep 2024; 14:1092. [PMID: 38212527 PMCID: PMC10784575 DOI: 10.1038/s41598-024-51237-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 01/02/2024] [Indexed: 01/13/2024] Open
Abstract
In this study, a novel proton-conducting polymer electrolyte membrane based on a mixture of polyvinyl alcohol (PVA)/polyvinyl pyrrolidone (PVP) (1:1) mixed with different ratios of graphene oxide (GO) and plasma-treated was successfully synthesized. Dielectric barrier dielectric (DBD) plasma was used to treat the prepared samples at various dose rates (2, 4, 6, 7, 8, and 9 min) and at fixed power input (2 kV, 50 kHz). The treated samples (PVA/PVP:GO wt%) were soaked in a solution of styrene and tetrahydrofuran (70:30 wt%) with 5 × 10-3 g of benzoyl peroxide as an initiator in an oven at 60 °C for 12 h and then sulfonated to create protonic membranes (PVA/PVP-g-PSSA:GO). The impacts of graphene oxide (GO) on the physical, chemical, and electrochemical properties of plasma-treated PVA/PVP-g-PSSA:x wt% GO membranes (x = 0, 0.1, 0.2, and 0.3) were investigated using different techniques. SEM results showed a better dispersion of nanocomposite-prepared membranes; whereas the AFM results showed an increase in total roughness with increasing the content of GO. FTIR spectra provide more information about the structural variation arising from the grafting and sulfonation processes to confirm their occurrence. The X-ray diffraction pattern showed that the PVA/PVP-g-PSSA:x wt% GO composite is semi-crystalline. As the level of GO mixing rises, the crystallinity of the mixes decreases. According to the TGA curve, the PVA/PVP-g-PSSA:x wt% GO membranes are chemically stable up to 180 °C which is suitable for proton exchange membrane fuel cells. Water uptake (WU) was also measured and found to decrease from 87.6 to 63.3% at equilibrium with increasing GO content. Ion exchange capacity (IEC) was calculated, and the maximum IEC value was 1.91 meq/g for the PVA/PVP-g-PSSA: 0.3 wt% GO composite membrane. At room temperature, the maximum proton conductivity was 98.9 mS/cm for PVA/PVP-g-PSSA: 0.3 wt% GO membrane. In addition, the same sample recorded a methanol permeability of 1.03 × 10-7 cm2/s, which is much less than that of Nafion NR-212 (1.63 × 10-6 cm2/s). These results imply potential applications for modified polyelectrolytic membranes in fuel cell technology.
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Affiliation(s)
- M O Abdel-Hamed
- Physics Department, Faculty of Science, Minia University, P.O. Box 61519, Minia, Egypt.
| | - Aya A Draz
- Physics Department, Faculty of Science, Minia University, P.O. Box 61519, Minia, Egypt
| | - Mohamed Khalaf
- Physics Department, Faculty of Science, Sohag University, P.O. Box 82524, Sohag, Egypt
| | - F M El-Hossary
- Physics Department, Faculty of Science, Sohag University, P.O. Box 82524, Sohag, Egypt
| | - Hamdy F M Mohamed
- Physics Department, Faculty of Science, Minia University, P.O. Box 61519, Minia, Egypt
| | - E E Abdel-Hady
- Physics Department, Faculty of Science, Minia University, P.O. Box 61519, Minia, Egypt
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Thi Huong N, Thi Mai Huong P, Thi Kim Giang N, Thi Lan P, Thanh Dong V, Tien Dung C. Fe 3O 4/CuO/Chitosan Nanocomposites: An Ultrasound-Assisted Green Approach for Antibacterial and Photocatalytic Properties. ACS OMEGA 2023; 8:42429-42439. [PMID: 38024769 PMCID: PMC10652728 DOI: 10.1021/acsomega.3c04956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 10/20/2023] [Accepted: 10/20/2023] [Indexed: 12/01/2023]
Abstract
The fundamental goal of this research was to use an environmentally friendly sonochemical method to synthesize a Fe3O4/CuO/chitosan magnetic nanocomposite. The nanocomposites featured particle sizes ranging from 50 to 90 nm, and structural characteristics were thoroughly examined. Moreover, the material displayed selective photodegradation capabilities with MB, achieving an impressive efficiency of nearly 98% within 180 min under specific conditions. Notably, the material's reusability was remarkable, maintaining an efficiency of approximately 88% even after five cycles. The possible photodegradation mechanism was proposed based on the evaluation of energy bands, along with a comprehensive analysis of the impacts on MB photodegradation. Concurrently, adsorption isotherms and kinetic models were evaluated. Additionally, this material exhibited promising antibacterial activity against Saccharomyces cerevisiae, Bacillus subtilis, and Escherichia coli. These findings suggested that the Fe3O4/CuO/chitosan material could be utilized in real-world scenarios for environmental purification due to its ability to function as a photocatalyst and antibacterial agent.
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Affiliation(s)
- Nguyen Thi Huong
- Institute
of Chemistry and Materials, 17 Hoang Sam, Nghia Do, Cau Giay, Ha Noi 100000, Vietnam
| | - Pham Thi Mai Huong
- Hanoi
University of Industry, 298 Cau Dien, Bac Tu Liem, Ha Noi 100000, Vietnam
| | - Nguyen Thi Kim Giang
- Faculty
of Chemistry, Hanoi National University
of Education, 136 Xuan Thuy, Cau Giay, Hanoi 100000, Vietnam
| | - Phung Thi Lan
- Faculty
of Chemistry, Hanoi National University
of Education, 136 Xuan Thuy, Cau Giay, Hanoi 100000, Vietnam
| | - Vu Thanh Dong
- Institute
of Chemistry and Materials, 17 Hoang Sam, Nghia Do, Cau Giay, Ha Noi 100000, Vietnam
| | - Cong Tien Dung
- Hanoi
University of Mining and Geology, 18 Pho Vien, Hanoi 100000, Vietnam
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Vinícius da Silva Paula M, Araújo de Azevedo L, Diego de Lima Silva I, Brito da Silva CA, Vinhas GM, Alves S. Gamma radiation effect on the chemical, mechanical and thermal properties of PCL/MCM-48-PVA nanocomposite films. Heliyon 2023; 9:e18091. [PMID: 37483791 PMCID: PMC10362146 DOI: 10.1016/j.heliyon.2023.e18091] [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: 02/28/2023] [Revised: 07/05/2023] [Accepted: 07/06/2023] [Indexed: 07/25/2023] Open
Abstract
In this work, poly (vinyl alcohol) (PVA) was employed to produce a Mesoporous Composition of Matter-48 Modified (MCM-48-M or MCM-48-PVA). After surface modification, MCM-48-M was used to produce nanocomposite (NC) films with polycaprolactone (PCL) as a matrix at room temperature. PCL and MCM-48 nanoparticles (NPs) were chosen due to their great biocompatibility and low toxicity. However, MCM-48-M is more compatible with PCL than MCM-48. NC films were sterilized by gamma radiation with a dose of 25 kGy and characterized by experimental techniques to investigate their chemical, mechanical (tensile) and thermal properties. Scanning electron microscopy (SEM) and transmission electronic microscopy (TEM) results indicated that MCM-48-M exhibited a random distribution in the PCL matrix. The PCL chemical structure was preserved in NC films as described by Fourier transform infrared (FT-IR) spectroscopy as well as the tensile and thermal properties of NC films. FT-IR and thermogravimetric analysis (TGA) results showed surface modification. X-ray diffraction (XRD) and differential scanning calorimetry (DSC) showed that crystalline symmetries were preserved and the crystallinity of NC films had small variations in all samples before and after irradiation, respectively. But, our results did not indicate major changes showing that this method is successful for the sterilization of PCL/MCM-48-PVA NC films.
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Affiliation(s)
| | | | - Ivo Diego de Lima Silva
- Departamento de Engenharia Química, Universidade Federal de Pernambuco, Pernambuco 50670-901, Brazil
| | | | - Glória Maria Vinhas
- Departamento de Engenharia Química, Universidade Federal de Pernambuco, Pernambuco 50670-901, Brazil
| | - Severino Alves
- Laboratório de Terras Raras, Universidade Federal de Pernambuco, Pernambuco 50670-901, Brazil
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Gheorghita D, Grosu E, Robu A, Ditu LM, Deleanu IM, Gradisteanu Pircalabioru G, Raiciu AD, Bita AI, Antoniac A, Antoniac VI. Essential Oils as Antimicrobial Active Substances in Wound Dressings. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15196923. [PMID: 36234263 PMCID: PMC9570933 DOI: 10.3390/ma15196923] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 09/30/2022] [Accepted: 10/03/2022] [Indexed: 05/13/2023]
Abstract
Wound dressings for skin lesions, such as bedsores or pressure ulcers, are widely used for many patients, both during hospitalization and in subsequent treatment at home. To improve the treatment and shorten the healing time and, therefore, the cost, numerous types of wound dressings have been developed by manufacturers. Considering certain inconveniences related to the intolerance of some patients to antibiotics and the antimicrobial, antioxidant, and curative properties of certain essential oils, we conducted research by incorporating these oils, based on polyvinyl alcohol/ polyvinyl pyrrolidone (PVA/PVP) biopolymers, into dressings. The objective of this study was to study the potential of a polymeric matrix for wound healing, with polyvinyl alcohol as the main material and polyvinyl pyrrolidone and hydroxypropyl methylcellulose (HPMC) as secondary materials, together with additives (plasticizers poly(ethylene glycol) (PEG) and glycerol), stabilizers (Zn stearate), antioxidants (vitamin A and vitamin E), and four types of essential oils (fennel, peppermint, pine, and thyme essential oils). For all the studied samples, the combining compatibility, antimicrobial, and cytotoxicity properties were investigated. The obtained results demonstrated a uniform morphology for almost all the samples and adequate barrier properties for contact with suppurating wounds. The results show that the obtained samples containing essential oils have a good inhibitory effect on, or antimicrobial properties against, Staphylococcus aureus ATCC 25923, Enterococcus faecalis ATCC 29212, Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853, and Candida albicans ATCC 10231. The MTT assay showed that the tested samples were not toxic and did not lead to cell death. The results showed that the essential oils used provide an effective solution as active substances in wound dressings.
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Affiliation(s)
- Daniela Gheorghita
- Faculty of Material Science and Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei Street, 060042 Bucharest, Romania
| | - Elena Grosu
- Faculty of Material Science and Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei Street, 060042 Bucharest, Romania
| | - Alina Robu
- Faculty of Material Science and Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei Street, 060042 Bucharest, Romania
| | - Lia Mara Ditu
- Faculty of Biology, University of Bucharest, 1-3 Intr. Portocalelor Street, 060101 Bucharest, Romania
| | - Iuliana Mihaela Deleanu
- Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1-7 Polizu Street, 011061 Bucharest, Romania
| | - Gratiela Gradisteanu Pircalabioru
- Research Institute of the University of Bucharest, 90 Sos. Panduri, 050663 Bucharest, Romania
- Academy of Romanian Scientists, 54 Splaiul Independentei Street, 050094 Bucharest, Romania
| | - Anca-Daniela Raiciu
- Faculty of Pharmacy, Titu Maiorescu University, 22 Dambovnicului Street, 040441 Bucharest, Romania
- S.C. Hofigal Import Export S.A., 2 Intrarea Serelor Street, 042124 Bucharest, Romania
| | - Ana-Iulia Bita
- Faculty of Material Science and Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei Street, 060042 Bucharest, Romania
- Correspondence:
| | - Aurora Antoniac
- Faculty of Material Science and Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei Street, 060042 Bucharest, Romania
| | - Vasile Iulian Antoniac
- Faculty of Material Science and Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei Street, 060042 Bucharest, Romania
- Academy of Romanian Scientists, 54 Splaiul Independentei Street, 050094 Bucharest, Romania
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Nawar AM, Ali HE, Khairy Y, Awwad NS, Algarni H, Shakir M, Sayed MA, Fawy KF, Alderhami SA, Abdel‐Aziz M. Fabrication, microstructure, and nonlinear/linear optical parameters of polymeric‐based poly(vinyl alcohol)/poly(vinyl pyrrolidone) nanocomposites films for optical attenuation applications. POLYM ADVAN TECHNOL 2022. [DOI: 10.1002/pat.5783] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Ahmed Mahmoud Nawar
- Thin Films Laboratory, Physics Department, Faculty of Science Suez Canal University Ismailia Egypt
- Physics Department, Faculty of Science and Arts Almikhwah, AlBAHA University AlBaha Saudi Arabia
| | - Haitham Elhosiny Ali
- Advanced Functional Materials & Optoelectronic Laboratory (AFMOL), Department of Physics Faculty of Science, King Khalid University Abha Saudi Arabia
- Research Center for Advanced Materials Science (RCAMS) King Khalid University Abha Saudi Arabia
- Physics Department Faculty of Science, Zagazig University Zagazig Egypt
| | - Yasmin Khairy
- Physics Department Faculty of Science, Zagazig University Zagazig Egypt
| | - Nasser Sayed Awwad
- Department of Chemistry, Faculty of Science King Khalid University Abha Saudi Arabia
| | - Hamed Algarni
- Advanced Functional Materials & Optoelectronic Laboratory (AFMOL), Department of Physics Faculty of Science, King Khalid University Abha Saudi Arabia
- Research Center for Advanced Materials Science (RCAMS) King Khalid University Abha Saudi Arabia
| | - Mohamed Shakir
- Advanced Functional Materials & Optoelectronic Laboratory (AFMOL), Department of Physics Faculty of Science, King Khalid University Abha Saudi Arabia
- Research Center for Advanced Materials Science (RCAMS) King Khalid University Abha Saudi Arabia
| | - Mahmoud Ahmed Sayed
- Advanced Functional Materials & Optoelectronic Laboratory (AFMOL), Department of Physics Faculty of Science, King Khalid University Abha Saudi Arabia
- Physics Department, Faculty of Science Al‐Azhar University Assiut Egypt
| | - Khaled Fahmi Fawy
- Department of Chemistry, Faculty of Science King Khalid University Abha Saudi Arabia
| | - Suliman Ahmed Alderhami
- Chemistry Department, Faculty of Science and Arts AlMikhwah, AlBaha University AlBaha Saudi Arabia
| | - Mohamed Abdel‐Aziz
- Department of Physics, Faculty of Science Al‐Azhar University Nasr City Cairo Egypt
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Elhosiny Ali H, Abdel-Aziz M, Mahmoud Ibrahiem A, Sayed MA, Abd-Rabboh HSM, Awwad NS, Algarni H, Shkir M, Yasmin Khairy M. Microstructure Study and Linear/Nonlinear Optical Performance of Bi-Embedded PVP/PVA Films for Optoelectronic and Optical Cut-Off Applications. Polymers (Basel) 2022; 14:polym14091741. [PMID: 35566911 PMCID: PMC9104475 DOI: 10.3390/polym14091741] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 04/13/2022] [Accepted: 04/20/2022] [Indexed: 02/04/2023] Open
Abstract
Hybrid polymer films of polyvinyl pyrrolidone (PVP)/polyvinyl alcohol (PVA) embedded with gradient levels of Bi-powder were prepared using a conventional solution casting process. XRD, FTIR, and SEM techniques have been used to examine the micro/molecular structure and morphology of the synthesized flexible films. The intensities of the diffraction peaks and transmission spectrum of the PVP/PVA gradually declined with the introduction of Bi-metal. In addition, filler changes the microstructure surface of the pure film. The modification in the microstructure leads to an enhancement in the optical absorption characteristic of the blend films. The indirect allowed transition energy was calculated via Tauc’s and ASF (Absorption Spectra Fitting) models. The decrease in the hybrid film’s bandgap returns to the localized states in the forbidden region, which led the present films to be suitable for photo-electric, solar cell, etc., applications. The relation between the transition energy and the refractive index was studied. The enhancement in the refractive index with Bi-metal concentrations led to use the as-prepared films in optical sensors. The rise of Bi-metal concentrations leads also to the improvement of the nonlinear susceptibility and refractive parameters. The optical limiting characteristics revealed that the higher concentration dopant films reduce the light transmission intensity which is appropriate for laser attenuation and optical limiting in photonic devices. The results suggest that hybrid films are promising materials in a wide range of opto-electronic applications.
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Affiliation(s)
- H. Elhosiny Ali
- Advanced Functional Materials & Optoelectronic Laboratory (AFMOL), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia; (H.E.A.); (A.M.I.); (M.A.S.); (H.A.)
- Physics Department, Faculty of Science, Zagazig University, Zagazig 44519, Egypt
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
| | - Mohammad Abdel-Aziz
- Department of Physics, Faculty of Science, Al-Azhar University, Cairo 11884, Egypt;
| | - Ashraf Mahmoud Ibrahiem
- Advanced Functional Materials & Optoelectronic Laboratory (AFMOL), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia; (H.E.A.); (A.M.I.); (M.A.S.); (H.A.)
- Physics Department, Faculty of Science, Aswan University, Aswan 81528, Egypt
| | - Mahmoud A. Sayed
- Advanced Functional Materials & Optoelectronic Laboratory (AFMOL), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia; (H.E.A.); (A.M.I.); (M.A.S.); (H.A.)
- Physics Department, Faculty of Science, Al-Azhar University, Assiut 71524, Egypt
| | - Hisham S. M. Abd-Rabboh
- Department of Chemistry, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia; (H.S.M.A.-R.); (N.S.A.)
- Department of Chemistry, Faculty of Science, Ain Shams University, Cairo 11566, Egypt
| | - Nasser S. Awwad
- Department of Chemistry, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia; (H.S.M.A.-R.); (N.S.A.)
| | - Hamed Algarni
- Advanced Functional Materials & Optoelectronic Laboratory (AFMOL), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia; (H.E.A.); (A.M.I.); (M.A.S.); (H.A.)
| | - Mohd. Shkir
- Advanced Functional Materials & Optoelectronic Laboratory (AFMOL), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia; (H.E.A.); (A.M.I.); (M.A.S.); (H.A.)
- Department of Chemistry and University Centre for Research & Development, Chandigarh University, Mohali 140413, Punjab, India
- School of Science and Technology, Glocal University, Saharanpur 247001, Uttar Pradesh, India
- Correspondence: (M.S.); (M.Y.K.)
| | - M. Yasmin Khairy
- Physics Department, Faculty of Science, Zagazig University, Zagazig 44519, Egypt
- Correspondence: (M.S.); (M.Y.K.)
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Elumalai N, Prabhu S, Selvaraj M, Silambarasan A, Navaneethan M, Harish S, Ramu P, Ramesh R. Enhanced photocatalytic activity of ZnO hexagonal tube/r-GO composite on degradation of organic aqueous pollutant and study of charge transport properties. CHEMOSPHERE 2022; 291:132782. [PMID: 34748798 DOI: 10.1016/j.chemosphere.2021.132782] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 10/11/2021] [Accepted: 11/02/2021] [Indexed: 06/13/2023]
Abstract
ZnO hexagonal tube and ZnO/r-GO nanocomposites were synthesized by hydrothermal method and the nanostructures were characterized by XRD, UV-DRS, PL, FTIR, FESEM, and TEM techniques. The main violet emission peak of the synthesized nanostructures is due to the transition between interstitial zinc and hole (valence band) of ZnO. The potential of ZnO/r-GO nanocomposite was evaluated using methyl orange (MO) and rhodamine-B (RhB), and the results were compared with the activity of synthesized ZnO nanostructures. More than 95% of MO and RhB were by ZnO/r-GO nanocomposite and it was found to be higher than that of ZnO hexagonal tube. The degradation MO and RhB were found to follow first-order kinetics and it has a rate constant of 7.68 × 10-2and 7.83 × 10-2 min-1, respectively. These results are mainly due to the enhanced charge transport property. Trapping experiments show that superoxide radical anion and hydroxide radicals are chief species responsible for the degradation of MO and RhB. The chemical stability of the nanocomposite was evaluated by cycle test experiments and it reveals that the catalyst can be reused up to few cycles without considerable loss of photocatalytic activity. This work affords a simple stratagem to integrate ZnO hexagonal tubes and r-GO nanosheets to construct effective catalysts for the degradation of organic compounds.
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Affiliation(s)
- N Elumalai
- Department of Physics, Government Arts College (Autonomous), Salem, 7, Tamil Nadu, India; Department of Physics, Periyar University, Salem, 11, Tamil Nadu, India
| | - S Prabhu
- Department of Physics, Periyar University, Salem, 11, Tamil Nadu, India
| | - M Selvaraj
- Department of Chemistry, Faculty of Science, King Khalid University, Abha, 61413, Saudi Arabia.
| | - A Silambarasan
- Department of Chemistry, Vivekanandha College of Arts and Sciences for Women (Autonomous), Elayampalayam, Namakkal, 637 205, Tamil Nadu, India.
| | - M Navaneethan
- Nanotechnology Research Centre, SRM Institute of Science and Technology, Kanchepuram, Tamil Nadu, India; Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kanchepuram, Tamil Nadu, India.
| | - S Harish
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kanchepuram, Tamil Nadu, India
| | - P Ramu
- Department of Physics, Government Arts College (Autonomous), Salem, 7, Tamil Nadu, India.
| | - R Ramesh
- Department of Physics, Periyar University, Salem, 11, Tamil Nadu, India.
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Nanocomposite of PVA/PVP blend incorporated by copper oxide nanoparticles via nanosecond laser ablation for antibacterial activity enhancement. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-021-03975-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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9
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Highly Sensitive Humidity Sensors Based on Polyethylene Oxide/CuO/Multi Walled Carbon Nanotubes Composite Nanofibers. MATERIALS 2021; 14:ma14041037. [PMID: 33671689 PMCID: PMC7927036 DOI: 10.3390/ma14041037] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 02/12/2021] [Accepted: 02/16/2021] [Indexed: 11/25/2022]
Abstract
Polymer composites are favorite materials for sensing applications due to their low cost and easy fabrication. In the current study, composite nanofibers consisting of polyethylene oxide (PEO), oxidized multi-walled carbon nanotubes (MWCNT) and copper oxide (CuO) nanoparticles with 1% and 3% of fillers (i.e., PEO–CuO–MWCNT: 1%, and PEO–CuO–MWCNT: 3%) were successfully developed through electrospinning for humidity sensing applications. The composite nanofibers were characterized by FTIR, XRD, SEM and EDX analysis. Firstly, they were loaded on an interdigitated electrode (IDE), and then the humidity sensing efficiency was investigated through a digital LCR meter (E4980) at different frequencies (100 Hz–1 MHz), as well as the percentage of relative humidity (RH). The results indicated that the composite nanofibers containing 1% and 3% MWCNT, combined with CuO in PEO polymer matrix, showed potent resistive and capacitive response along with high sensitivity to humidity at room temperature in an RH range of 30–90%. More specifically, the PEO–CuO–MWCNT: 1% nanocomposite displayed a resistive rapid response time within 3 s and a long recovery time of 22 s, while the PEO–CuO–MWCNT: 3% one exhibited 20 s and 11 s between the same RH range, respectively.
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Li S, Zhang R, Xie J, Sameen DE, Ahmed S, Dai J, Qin W, Li S, Liu Y. Electrospun antibacterial poly(vinyl alcohol)/Ag nanoparticles membrane grafted with 3,3',4,4'-benzophenone tetracarboxylic acid for efficient air filtration. APPLIED SURFACE SCIENCE 2020; 533:147516. [PMID: 32834268 PMCID: PMC7425774 DOI: 10.1016/j.apsusc.2020.147516] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 07/31/2020] [Accepted: 08/07/2020] [Indexed: 05/05/2023]
Abstract
In this study, poly(vinyl alcohol) (PVA) membranes containing Ag nanoparticles (AgNPs) were prepared by electrospinning and grafted copolymerization with 3,3',4,4'-benzophenone tetracarboxylic acid (BPTA) to provide better mechanical properties, lower water vapor transmittance, and higher antibacterial activity (against Staphylococcus aureus and Escherichia coli) than the PVA/AgNPs membrane. The PVA/AgNPs/BPTA membrane showed higher antibacterial activity than the other membranes, and it produced inhibition zones with diameters of 18.12 ± 0.08 and 16.41 ± 0.05 mm against S. aureus and E. coli, respectively. The PVA/AgNPs/BPTA membrane was found to be capable of promoting reactive oxygen species (ROS) formation under both light and dark conditions. Cycling experiments performed following ROS quenching showed that the best-performing composite membrane retained >70% of its original OH⋅ radical and H2O2 charging capacity after seven cycles. In the filtration test, the electrospun nanofibrous membranes showed high filtration efficiencies of 99.98% for sodium chloride (NaCl). In addition, these membranes maintained a relatively low pressure drop of 168 Pa with a basis weight of 2.1 g m-2. Thus, the PVA/AgNPs/BPTA membrane was concluded to be a promising medical protective material offering the benefits of structural stability and reusability.
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Affiliation(s)
- Siying Li
- College of Food Science, Sichuan Agricultural University, Yaan 625014, China
| | - Rong Zhang
- College of Food Science, Sichuan Agricultural University, Yaan 625014, China
| | - Junlan Xie
- College of Food Science, Sichuan Agricultural University, Yaan 625014, China
| | - Dur E Sameen
- College of Food Science, Sichuan Agricultural University, Yaan 625014, China
| | - Saeed Ahmed
- College of Food Science, Sichuan Agricultural University, Yaan 625014, China
| | - Jianwu Dai
- College of Mechanical and Electrical Engineering, Sichuan Agricultural University, Ya'an 625014, China
| | - Wen Qin
- College of Food Science, Sichuan Agricultural University, Yaan 625014, China
| | - Suqing Li
- College of Food Science, Sichuan Agricultural University, Yaan 625014, China
| | - Yaowen Liu
- College of Food Science, Sichuan Agricultural University, Yaan 625014, China
- California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA
- Department of Bioengineering, University of California, Los Angeles, CA, 90095, USA
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11
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Production of the ZnO-folic acid nanoparticles and poly(vinyl alcohol) nanocomposites: investigation of morphology, wettability, thermal, and antibacterial properties. JOURNAL OF POLYMER RESEARCH 2020. [DOI: 10.1007/s10965-020-02200-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Environmentally benign production of cupric oxide nanoparticles and various utilizations of their polymeric hybrids in different technologies. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213378] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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CuO and CuO/Vermiculite Based Nanoparticles in Antibacterial PVAc Nanocomposites. J Inorg Organomet Polym Mater 2020. [DOI: 10.1007/s10904-020-01573-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Refaat A, Ibrahim MA, Elhaes H, Badry R, Ezzat H, Yahia IS, Zahran HY, Shkir M. Geometrical, vibrational and physical properties of polyvinyl chloride nanocomposites: Molecular modeling approach. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2020. [DOI: 10.1142/s0219633619500378] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
B3LYP/6-31G([Formula: see text], [Formula: see text]) quantum mechanical calculations were conducted to study polyvinyl chloride (PVC) and PVC with metal oxides (ZnO and CuO). Accordingly, model molecules for PVC; PVC/[Formula: see text]ZnO; PVC/[Formula: see text]CuO and PVC/[Formula: see text]ZnO/[Formula: see text]CuO, where [Formula: see text] and [Formula: see text], 2 and 3, were proposed. The calculated results of total dipole moment (TDM), HOMO–LUMO energy band gap, and molecular electrostatic potentials (ESPs) indicated that the conductivity of PVC is increased and its surface became more reactive due to interaction with metal oxides. The effect of hydration on PVC was also studied at the same level of theory in order to assess the effect of up to 23 water molecules on PVC. The TDM value of PVC is increased but HOMO/LUMO band gap energy value is decreased because of hydration. Moreover, the results of calculated ESP indicated that the reactivity in the presence of water molecules increased, which could indicate possible degradation of PVC. Additionally, some geometrical parameters were studied. Furthermore, the scaled infrared spectrum (IR) for PVC was also calculated at B3LYP/6-31G ([Formula: see text], [Formula: see text]) and indicated that there are two bands at 2990[Formula: see text]cm[Formula: see text] and 2975[Formula: see text]cm[Formula: see text] in comparison with Fourier transform infrared spectrum (FTIR).
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Affiliation(s)
- A. Refaat
- Spectroscopy Department, National Research Centre, 33 El-Bohouth Str. 12622 Dokki, Giza, Egypt
| | - M. A. Ibrahim
- Spectroscopy Department, National Research Centre, 33 El-Bohouth Str. 12622 Dokki, Giza, Egypt
| | - H. Elhaes
- Physics Department, Faculty of Women for Arts, Science and Education, Ain Shams University, 11757 Cairo, Egypt
| | - R. Badry
- Physics Department, Faculty of Women for Arts, Science and Education, Ain Shams University, 11757 Cairo, Egypt
| | - H. Ezzat
- National Research Institute of Astronomy and Geophysics (NRIAG), Helwan, Cairo, Egypt
| | - I. S. Yahia
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha 61413, P.O. Box 9004, Saudi Arabia
- Advanced Functional Materials & Optoelectronics Laboratory (AFMOL), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia
- Nanoscience Laboratory for Environmental and Bio-Medical Applications (NLEBA), Semiconductor Lab., Metallurgical, Lab. 2 Physics Department, Faculty of Education, Ain Shams University, Roxy, 11757 Cairo, Egypt
| | - H. Y. Zahran
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha 61413, P.O. Box 9004, Saudi Arabia
- Advanced Functional Materials & Optoelectronics Laboratory (AFMOL), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia
- Nanoscience Laboratory for Environmental and Bio-Medical Applications (NLEBA), Semiconductor Lab., Metallurgical, Lab. 2 Physics Department, Faculty of Education, Ain Shams University, Roxy, 11757 Cairo, Egypt
| | - Mohd. Shkir
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha 61413, P.O. Box 9004, Saudi Arabia
- Advanced Functional Materials & Optoelectronics Laboratory (AFMOL), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia
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Mallakpour S, Khani Z. An eco-friendly method for the preparation of poly(N-vinyl-2-pyrrolidone)–poly(vinyl alcohol) blend nanocomposite films containing vitamin B1-modified silica nanoparticles to enhance thermal and wettability properties. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-02814-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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