期刊
FRONTIERS IN CHEMISTRY
卷 10, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fchem.2022.856556
关键词
graphene oxide1; polyvinyl alcohol; nanocomposites; in situ reduction; electrical conductivity
资金
- Guangxi Science and Technology Base and Talent Special Project [GuikeAD19254003]
- Natural Science Foundation of Guangxi [2021GXNSFAA196038]
The study investigated the multiple properties of nanocomposites formed by graphene oxide and carbazate-modified polyvinyl alcohol, and the comprehensive performance was enhanced with the increased amount of in situ reduced graphene oxide.
The nanocomposites formed by graphene oxide (GO) and carbazate-modified polyvinyl alcohol (PVA-N) were developed to investigate their multiple properties for wide applications. Their physicochemical characterizations confirmed that the in situ reduced GO (rGO) not only decreased the crystallization but also induced the porous structures inside the nanocomposites. Significantly, it revealed that the comprehensive performance of PVA-N2-2%GO consisted of PVA-N2 with the carbazate degree of substitution (DS) of 7% and the weight ratio (wt%) of 2% GO displayed 79% of tensile elongation and tensile strength of 5.96 N/mm(2) (MPa) by tensile testing, glass transition temperature (Tg) of 60.8 degrees C and decomposition temperature (Td) of 303.5 degrees C by TGA and DSC, surface contact angle at 89.4 +/- 2.1 degrees, and electrical conductivity of 9.95 x 10(-11) S/cm. The abovementioned comprehensive performance was enhanced with the increased amount of in situ rGO, contributed by the high DS of the carbazate group in PVA-N and high amount of GO. The rGO by in situ reduction was the main driving force for enhancing the multiple properties inside the nanocomposites.
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