Effect of Polyvinylpyrrolidone on the Structure Development, Electrical, Thermal, and Wetting Properties of Polyvinylidene Fluoride-Expanded Graphite Nanocomposites
Article
Haridass, Reshma, Sabu, Aleena, Augustin, Nikhitha, Annamalai, Pratheep Kumar and Brahmadesam Thoopul Srinivasa, Ramanujam. 2024. "Effect of Polyvinylpyrrolidone on the Structure Development, Electrical, Thermal, and Wetting Properties of Polyvinylidene Fluoride-Expanded Graphite Nanocomposites." ACS Omega. 9 (1), pp. 178-195. https://doi.org/10.1021/acsomega.3c03083
Article Title | Effect of Polyvinylpyrrolidone on the Structure Development, Electrical, Thermal, and Wetting Properties of Polyvinylidene Fluoride-Expanded Graphite Nanocomposites |
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ERA Journal ID | 210031 |
Article Category | Article |
Authors | Haridass, Reshma, Sabu, Aleena, Augustin, Nikhitha, Annamalai, Pratheep Kumar and Brahmadesam Thoopul Srinivasa, Ramanujam |
Journal Title | ACS Omega |
Journal Citation | 9 (1), pp. 178-195 |
Number of Pages | 18 |
Year | 2024 |
Publisher | American Chemical Society |
Place of Publication | United States |
ISSN | 2470-1343 |
Digital Object Identifier (DOI) | https://doi.org/10.1021/acsomega.3c03083 |
Web Address (URL) | https://pubs.acs.org/doi/10.1021/acsomega.3c03083 |
Abstract | Polyvinylidene fluoride (PVDF)-expanded graphite (ExGr) nanocomposites have been prepared by solution blending and melt processing methods. In the presence of polyvinylpyrrolidone (PVP), enhanced dispersion of graphite nanosheets (GNSs) in the PVDF matrix, as suggested by field emission scanning electron microscopy analysis, results in very low electrical percolation threshold (0.3 wt % ExGr). X-ray diffraction, Fourier transform infrared spectroscopy, and differential scanning calorimetry (DSC) analyses confirm the coexistence of electroactive gamma and nonpolar alpha phases. Wrapping of PVP chains around GNSs reduces the crystallinity in PVDF-ExGr nanocomposites in comparison to that in neat PVDF films, as evidenced by DSC analysis. Thermogravimetric analysis confirms enhanced thermal stability of PVDF-ExGr nanocomposites above 500 °C mainly attributed to the PVP-assisted dispersion of GNSs. The water contact angle of solution-blended PVDF-ExGr nanocomposite films increases with and without PVP in comparison to that of the neat PVDF film. Compression-molded PVDF-ExGr nanocomposites also exhibit electroactive gamma and nonpolar alpha phases of PVDF with reduction in electrical conductivity compared to solvent-cast films. © 2023 The Authors. Published by American Chemical Society. |
Keywords | Anode Materials; Carbon; Composites; Fluoropolymers; Nanocomposites |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 401602. Composite and hybrid materials |
Byline Affiliations | Amrita Vishwa Vidyapeetham, India |
Centre for Future Materials | |
School of Agriculture and Environmental Science |
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