Preparation and properties of silanized functionalized graphene/polyurethane composites

Graphene oxide (GO) was prepared from a modified method of Hummers, then the GO was modified by γ-glycidoxypropyltrimethoxysilane (KH560) and reduced by hydrazine hydrate. The silylated reduced graphene oxide (KRGO) was obtained. The KRGO/polyurethane (PU) composites were prepared by solution mixing...

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Bibliographic Details
Published in:Ferroelectrics 2020-09, Vol.565 (1), p.173-180
Main Authors: Liu, Huan, Liu, Yu, Liu, Wei Qiao, Pan, Jun Li, Huang, Shou Qiang, Gang Mou, Zhi
Format: Article
Language:English
Subjects:
composites
Graphene
Graphene oxide
Hydrazines
Interlayers
KH560
Morphology
Polymer matrix composites
polyurethane
Polyurethane resins
Structural analysis
Thermal decomposition
thermal stability
Weight loss
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Summary:Graphene oxide (GO) was prepared from a modified method of Hummers, then the GO was modified by γ-glycidoxypropyltrimethoxysilane (KH560) and reduced by hydrazine hydrate. The silylated reduced graphene oxide (KRGO) was obtained. The KRGO/polyurethane (PU) composites were prepared by solution mixing method using the KRGO as the filler and PU solution as the matrix. The KRGO and KRGO/PU composites were systematically characterized. The structure and morphology characterization showed that the KRGO was uniformly dispersed in PU solution by covalent bonding. The interlayer distance of the graphene increased from 0.79 to 0.95 nm after modification. The KRGO could provide a good compatibility with the PU. The thermal stabilities of the KRGO/PU composites are increased with the increasing addition of KRGO. At the KRGO content value of 1 wt.%, the thermal decomposition temperature on 10% weight loss was approximately 47 °C higher than that of the pure PU.
ISSN:0015-0193
1563-5112
DOI:10.1080/00150193.2020.1761730