可连续化生产的电刺激响应型液晶纤维制备及其性能

为解决电刺激响应液晶纤维在无外加电极下的柔性变色问题,提出一种同轴三明治结构的电致变色液晶纤维的制备方法。采用连续涂层法制备以导电纤维为内导电层,导电水凝胶为外透明导电层,聚合物分散液晶为电致变色层的电刺激响应液晶纤维。对导电纤维种类、聚合物分散液晶体系组分等对电刺激响应液晶纤维形貌和电致变色性能的影响规律进行分析。结果表明:以炭黑掺杂锦纶为芯材的导电纤维,当胆甾相液晶、聚甲基丙烯酸甲酯、二氯甲烷质量比为15∶1∶8时,制备的电致变色液晶纤维有明显的3层核壳结构,具有良好的电致变色性能,其驱动电压为40 V,响应时间为9 s。所制备的无外加电极下电刺激响应液晶纤维器件可为纺织品智能柔性显示应用提供技术支持。

Preparation and properties of continuously produced electric-responsive liquid crystal fibers

To solve the color changing problem in flexible display made of electro-responsive liquid crystal fibers without an external electrode,this study developed a preparation process for electrochromic liquid crystal(ECLC)fibers with a coaxial sandwich structure.The ECLC fiber with conductive fiber for the inner conductive layer,conductive hydrogel for the outer transparent conductive layer,polymer dispersed liquid crystal(PDLC)as the electrochromic layer was prepared via a continuous coating method.The influence of conductive fiber types and PDLC components on the morphology and electrochromic properties of ECLC fibers was explored.The results show that when the carbon/polyamide fiber is as the core material and the mass ratio of R-CLC/polymethyl methacrylate/CH2Cl2 is set to 15∶1∶8,the prepared ECLC fiber has an obvious three-layer core-shell structure demonstrating good electrochromic performance in low driving voltage(40 V)and fast response time(9 s).The electrode-less ECLC fiber device developed in this study lays the foundation for the development of smart flexible display textiles.