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Tsyganov A, Vikulova M, Zotov I, Grapenko O, Vlasenko V, Bainyashev A, Gorokhovsky A, Gorshkov N. Thermal behavior of the dielectric response of composites based on poly(vinylidene fluoride) filled with two-dimensional V 2CT x MXenes. NANOSCALE 2024; 16:15208-15218. [PMID: 39058430 DOI: 10.1039/d4nr01612b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/28/2024]
Abstract
In this study, two-dimensional V2CTx MXenes were prepared by an accessible and rapid method, which involved aluminothermic combustion synthesis of the V2AlC MAX phase and its further processing in an HCl/LiF mixture under hydrothermal conditions. The resulting V2CTx MXene was characterised by XRD, SEM, TEM and XANES. A colloidal solution of the V2CTx MXene in dimethylformamide was used to prepare nanocomposites based on a poly(vinylidene fluoride) polymer matrix with a conductive filler content of 2.5 to 20 wt%. The nanocomposites were characterised by XRD, SEM and simultaneous DSC-TG analysis. The dielectric properties of the nanocomposites were studied using impedance spectroscopy in the frequency range from 100 Hz to 1 MHz at temperatures from -50 to +140 °C. The results showed that adding 20 wt% V2CTx to PVDF allows increasing the permittivity to 425.3 with a dielectric loss tangent of 0.54 at a frequency of 10 kHz. Studies of the temperature behavior of the dielectric response of composites have shown that the nature of the temperature dependence of the permittivity and dielectric loss tangent was determined mainly by the characteristics of the PVDF polymer matrix, while the filler had a significant effect only on the interfacial polarization, which increased with increasing V2CTx filler concentration and temperature.
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Affiliation(s)
- Alexey Tsyganov
- Department of Chemistry and Technology of Materials, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia.
| | - Maria Vikulova
- Department of Chemistry and Technology of Materials, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia.
| | - Ilya Zotov
- Department of Chemistry and Technology of Materials, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia.
| | - Olga Grapenko
- Research Institute of Physics, Southern Federal University, 194 Stachki Avenue, 344090, Rostov-on-Don, Russia
| | - Valery Vlasenko
- Research Institute of Physics, Southern Federal University, 194 Stachki Avenue, 344090, Rostov-on-Don, Russia
| | - Alexey Bainyashev
- Department of Chemistry and Technology of Materials, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia.
| | - Alexander Gorokhovsky
- Department of Chemistry and Technology of Materials, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia.
| | - Nikolay Gorshkov
- Department of Chemistry and Technology of Materials, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia.
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Broadband dielectric dispersion (20 Hz–1 GHz) and relaxation, crystalline structure, and thermal characterization of PVDF/PMMA blend films. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04632-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Fu G, Shi Q, Liang Y, He Y, Xue R, He S, Chen Y. Fluorescent markable multi-mode pressure sensors achieved by sandwich-structured electrospun P(VDF-HFP) nanocomposite films. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Molecular structural, optical analyses, and dielectric properties of PVDF/PVA-MK composites. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04167-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Jiang H, Ye H, Xu L. One-pot synthesis of hexafluorobutyl acrylate hyperbranched copolymer for graphene/poly(vinylidenefluoride-trifluoroethylene- chlorofluoroethylene) dielectric composite. NANOTECHNOLOGY 2022; 33:215703. [PMID: 35168218 DOI: 10.1088/1361-6528/ac5543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Accepted: 02/15/2022] [Indexed: 06/14/2023]
Abstract
Dielectric polymer film capacitor is rapidly emerging as next-generation energy storage for advanced engineering applications because of its lightweight, low cost, and processability. Further increasing energy density of polymer film with high charge-discharge efficiency is prevalent research spotlight. The filler/polymer composite with compatible interface is proved as an effective strategy to improve the energy storage capability of dielectric film. In this work, we designed hyperbranched hexafluorobutyl acrylate copolymer as miscible interface in graphene/fluoropolymer dielectric composite. A facile one-pot method was adopted to synthesize hyperbranched polyethylene grafted hexafluorobutyl acrylate (HBPE-g-HFBA) copolymer, which was adsorbed on surface of nanosheets by non-covalent interaction during exfoliation of natural graphite. The graphene/poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) (P(VDF-TrFE-CFE)) composite was prepared by solution casting. The interfacial polarization is enhanced with the improved compatibility of composite that is due to the chemical similarity between hexafluorobutyl acrylate segments and fluoropolymer matrix. The energy density of 0.1 wt% nanocomposite achieves 5.0 J cm-3with charge-discharge efficiency of 78.1% at 250 MV m-1. This work provides an optional route for non-covalent functionalization of graphene and the development of flexible polymer film capacitor with large energy storage capability.
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Affiliation(s)
- Huilei Jiang
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Huijian Ye
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Lixin Xu
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
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