Verpaalen Rob C P, Souren Anne E J, Debije Michael G, Engels Tom A P, Bastiaansen Cees W M, Schenning Albertus P H J
Laboratory of Stimuli-Responsive Functional Materials and Devices, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands.
Department of Mechanical Engineering, Materials Technology Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands and Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands.
Soft Matter. 2020 Mar 18;16(11):2753-2759. doi: 10.1039/d0sm00030b.
By spraying liquid crystal mixtures onto stretched polyamide 6 (PA6) substrates, dual-responsive heat/humidity bilayer actuators are generated. The oriented PA6 guides the self-organization of the liquid crystal monomers into well-aligned, anisotropic liquid crystal networks. The bilayer responds to changes in the environmental relative humidity, resulting in bending of the actuator with the liquid crystal network inside the curvature. In contrast, in conditions of constant high humidity (80%RH), increasing the temperature triggers the liquid crystal network coating to bend the bilayer in the opposing direction. The dual-responsivity to changes in environmental humidity and temperature is examined in detail and discussed theoretically to elucidate the humidity-gated, temperature responsive properties revealing guidelines for fabricating anisotropic bilayer actuators.
通过将液晶混合物喷涂到拉伸的聚酰胺6（PA6）基材上，可生成双响应热/湿度双层致动器。取向的PA6引导液晶单体自组装成排列良好的各向异性液晶网络。该双层对环境相对湿度的变化作出响应，导致致动器弯曲，液晶网络位于曲率内侧。相比之下，在恒定高湿度（80%RH）条件下，升高温度会促使液晶网络涂层使双层向相反方向弯曲。详细研究了对环境湿度和温度变化的双响应性，并从理论上进行了讨论，以阐明湿度门控、温度响应特性，为制造各向异性双层致动器提供指导。
