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Properties of graphene oxide/liquid crystal elastomer composites
- Chinese Journal of Liquid Crystals and Displays Vol. 38, Issue 2, Pages: 149-159(2023)
- 作者机构：
1.河北工业大学 应用物理系， 天津 300401
- 作者简介：
- 基金信息：
DOI：10.37188/CJLCD.2022-0333
CLC：
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GUO Rui-cai, LIN Yong, GAO Wen-hui, et al. Properties of graphene oxide/liquid crystal elastomer composites. [J]. Chinese Journal of Liquid Crystals and Displays 38(2):149-159(2023)
GUO Rui-cai, LIN Yong, GAO Wen-hui, et al. Properties of graphene oxide/liquid crystal elastomer composites. [J]. Chinese Journal of Liquid Crystals and Displays 38(2):149-159(2023) DOI： 10.37188/CJLCD.2022-0333.
摘要
近年来，氧化石墨烯/液晶弹性体复合膜凭借其稳定高效的光热性能，受到科学家的广泛关注。但目前研究者大多重点关注其光热响应行为及使用场景，并未系统研究外界刺激的强弱和复合膜自身的尺寸大小对其响应性能的影响。本文采用旋涂的方法在制备的具有固定取向的液晶薄膜上涂覆一层氧化石墨烯，制备了具有不同液晶分子取向的氧化石墨烯/液晶弹性复合膜，可以实现红外光和温度的双重刺激响应，并对其进行了响应性能和形变规律的表征和分析。实验结果表明，氧化石墨烯/液晶弹性体复合膜是一种红外-热响应型的复合膜，该复合膜由于裁剪方向的不同，会呈现2种不同的形变规律，以此为基础，研究了不同强度外场刺激下复合膜的响应特性，以及复合膜自身尺寸的不同对复合膜响应特性产生的影响。发现1型复合膜的响应性能主要受宽度影响，2型复合膜的响应性能主要受长度影响，为氧化石墨烯/液晶弹性体复合膜的应用提供了基础。使用该复合膜制备了仿生光热驱动器，证明了其在生物仿生领域的潜力。
Abstract
In recent years， graphene oxide/liquid crystal elastomer composites have received a lot of attention from scientists due to their stable and efficient photothermal properties. However， most researchers have focused on their photothermal response behavior and usage scenario， and have not systematically investigated the effects of the strength of external stimuli and the size of the composites themselves on their response performance. In this paper， graphene oxide/liquid crystal elastic composites with different liquid crystal molecular orientations were prepared by spin-coating a layer of graphene oxide on the prepared liquid crystal film with a fixed orientation， which can achieve the dual stimulation response of infrared light and temperature， and the response performance and deformation law were characterized and analyzed. The experimental results show that the graphene oxide/liquid crystal elastomer composite is an infrared-thermal responsive composite， which shows 2 different deformation laws due to different shearing modes. Based on this， the response properties of the composite under different intensity external field stimulation and the effect of different dimensions of the composite itself on the response properties of the composite are investigated. It is found that the response properties of type 1 composites are mainly affected by the width， and the response properties of type 2 composites are mainly affected by the length， which provides a basis for the application of graphene oxide/liquid crystal elastomer composites. Biomimetic photothermal actuators were prepared by this composite， implying great potential in the field of biomimicry.
关键词
液晶弹性体氧化石墨烯复合膜可逆形变响应性能
Keywords
liquid crystal elastomergraphene oxidereversible deformationresponse properties
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