Abstract Liquid-crystalline elastomer (LCE) nanocomposites exhibiting shape memory properties were prepared by dispersing a chemically modified graphene oxide (GO) in a smectic, lightly crosslinked epoxy resin obtained by curing p-bis(2,3-epoxypropoxy)-α-methylstilbene (DOMS) with sebacic acid (SA). Chemical grafting of DOMS monomer on GO particle surface improved interfacial adhesion between the epoxy matrix and the filler. The obtained nanocomposite films were characterized in their phase behavior, morphological and thermal properties. Furthermore, their shape memory properties were analyzed through two-way thermomechanical cycling tests. The combination of the LCE liquid crystallinity and the efficient dispersion of functionalized GO resulted in toughened, highly oriented systems endowed with enhanced shape memory response. Incorporation of 0.15 wt.% GO resulted in a significant increase of spontaneous elongation and reduced actuation temperature during cycling thermomechanical tensile testing, demonstrating the potential of these systems as shape memory materials for sensors and actuators.

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液晶/氧化石墨烯弹性体纳米复合材料的形状记忆行为

摘要 通过将化学改性的氧化石墨烯 (GO) 分散在近晶、轻度交联的环氧树脂中，制备了具有形状记忆特性的液晶弹性体 (LCE) 纳米复合材料，该环氧树脂是通过固化 p-双(2,3-环氧丙氧基)-α-甲基二苯乙烯获得的。 (DOMS) 与癸二酸 (SA)。DOMS 单体在 GO 颗粒表面的化学接枝提高了环氧树脂基体和填料之间的界面粘合力。所获得的纳米复合薄膜的特征在于它们的相行为、形态和热性能。此外，通过双向热机械循环测试分析了它们的形状记忆特性。LCE 液晶性和官能化 GO 的有效分散相结合，产生了增强的形状记忆响应的韧化、高度定向的系统。并入 0。