中国发明专利：可逆光致变形液晶高分子和碳纳米管复合薄膜的制备方法

发明（设计）人：彭慧胜，俞燕蕾，孙雪梅，王威

申请人：复旦大学

专利号：ZL 201210079623.3

摘要：

本发明属于智能材料技术领域，具体为一种可逆光致变形液晶高分子和碳纳米管复合薄膜及其制备方法。该复合薄膜中液晶高分子为含有光敏性偶氮苯液晶基元的交联型液晶弹性体，碳纳米管为高度有序取向碳纳米管薄膜。复合薄膜中，碳纳米管取向结构诱导液晶基元沿碳纳米管轴向取向，而不需要其他取向层。所制备的复合薄膜在紫外光照时向光弯曲，在可见光照时恢复原状。该复合薄膜在紫外光和可见光交替照射下发生的可逆变形，可以重复上百次而没有明显的衰减和疲劳。而且碳纳米管的引入大大增强了材料的机械性能，同时也赋予材料优异的电学性能。

Abstract：

The invention belongs to the technical field of an intelligent material and particularly relates to a reversible photoinduced deformation liquid crystal high polymer and carbon nano tube composite thin film and a preparation method thereof. A liquid crystal high polymer in the composite thin film is a cross-linked type liquid crystal elastic body containing a photosensitive azobenzene liquid crystal element; and a carbon nano tube is a highly and sequentially oriented carbon nano tube thin film. In the composite thin film, a carbon nano tube orienting structure induces the liquid crystal element to be oriented along the axial direction of the carbon nano tube; and other orienting layers are not needed. When the prepared composite thin film is in ultraviolet illumination, the composite thin film is bent towards lights and can be recovered to the original state when the composite thin film is irradiated by visible lights. Reversible deformation generated by alternatively illuminating the composite thin film by ultraviolet lights and visible lights can be repeated for hundreds of times and has no obvious attenuation and fatigue. Moreover, the introduction of the carbon nano tube greatly enhances the mechanical performance of the material, and the material has excellent electric performance.