Thermal, mechanical and electrical properties of polyurethane/(3-aminopropyl) triethoxysilane functionalized graphene/epoxy resin interpenetrating shape memory polymer composites

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• 作者：Lixin Zhang^a ; ^{edwardzlx@163.com" class="auth_mail" title="E-mail the corresponding author} ; Hongqian Jiao^b ; Hongfang Jiu^b ; ^{hongfangjiu@163.com" class="auth_mail" title="E-mail the corresponding author} ; Jianxia Chang^b ; Shaomei Zhang^b ; Yanan Zhao^b
• 关键词：Functionalized graphene ; Polyurethane/epoxy resin ; Thermo-electric dual-responsive composite ; Shape memory property
• 刊名：Composites Part A: Applied Science and Manufacturing
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：90
• 期：Complete
• 页码：286-295
• 全文大小：2799 K

文摘

Functionalized graphene (FG) was successfully synthesized by treating graphene oxide with (3-aminopropyl) triethoxysilane (KH-550) and then reduced by hydrazine hydrate. Subsequently, significant reinforcement of polyurethane/epoxy resin (PU/EP) composites in situ synthesized on the FG is prepared. Morphologic study shows that, due to the formation of chemical bonding, the FG was dispersed well in the PU/EP matrix and the mechanical performance is improved. Meanwhile, the thermal degradation temperature was enhanced almost 50 °C higher than that of PU/EP. The conductivity of PU/FG/EP nanocomposites was 82.713 × 10⁻⁶ S/m at 2.0 wt% loadings. The resulting composites exhibited 96% shape fixity, 94% shape recovery, enhanced shape recovery force to realize thermo-electric dual-responsive property. Comparing with the results in literature, the composites used in this study have shown a progress between electrical conductivity and shape memory property.