Abstract
Functionalized graphene oxide (FGO) was prepared by treating graphene oxide with γ-aminopropyl triethoxysilane (KH-550) before the mixture was dispersed into α, ω-dihydroxy polydimethylsiloxane to get room temperature vulcanized (RTV) silicone rubber composites by solution casting. The cured composites were then reduced with hydrazine hydrate to obtain functionalized graphene (FG)/RTV silicone rubber composites. The structures of FGO and the resultant composites were characterized by atomic force microscopy, FT-IR spectra and X-ray diffraction. KH-550 was found to be grafted onto graphene sheets, leading to an increased interlayer spacing. Significant improvements in thermal and mechanical properties were obtained. Both the FGO/RTV silicone rubber composite contain 1.0 wt% of FGO, and its reduced product showed an increase of one-step weight loss temperature with 61 °C and 133 °C higher than that of pure silicone rubber. Tensile strength and elongation at break of FG/RTV silicone rubber composite (with 0.5 wt% FGO content) increased by 175% and 67%, respectively, compared with those of pure silicone rubber.
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Funded by the National Natural Science Foundation of China (No. 51072059)
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Ma, W., Li, J., Deng, B. et al. Properties of functionalized graphene/room temperature vulcanized silicone rubber composites prepared by an In-situ reduction method. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 28, 127–131 (2013). https://doi.org/10.1007/s11595-013-0653-1
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DOI: https://doi.org/10.1007/s11595-013-0653-1