液晶与显示2025，Vol.40Issue(6)：836-845,10.DOI:10.37188/CJLCD.2025-0063
双层复合液晶弹性体的制备及光磁驱动性能
Preparation and photo-magnetic actuation properties of bilayer composite liquid crystal elastomers
摘要
Abstract
In order to endow liquid crystal elastomers(LCE)with multiple-stimuli-responsiveness and enhance their potential application in flexible robotics,we developed an interfacial polymerization strategy to fabricate a bilayer nanocomposite LCE with photochemical,photothermal,and magnetic responsiveness.The Fe3O4 nanoparticles coated with octa-vinyl polyhedral oligomeric silsesquioxane(POSS@Fe3O4 NPs)were sprayed onto the surface of partially polymerized azobenzene LCE,and then induced the free radical polymerization between the unreacted acrylic-ester groups in the polymeric matrix and the abundant vinyl on the magnetic nanomaterials layer,to yield a POSS@Fe3O4 NPs-LCE composite(PFe-LCEs)with a tightly-integrated organic-inorganic interface.With merits of the UV-induced isomerization of azobenzene mesogens and the photothermal conversion capability of POSS@Fe3O4 NPs,the composite elastomer could generate a 200° bending in 2 s under UV irradiation and returned to its initial state within 7.5 s under infrared light exposure.In contrast,utilizing visible light irradiation for 50 s can only restore 83％of the original shape.Additionally,this material exhibits magnetic responsiveness,allowing it to deflect under an applied magnetic field.The PFe-LCE was used to fabricate a quadrupedal transport robot capable of grasping,transporting,and releasing cargo through light-magnetic synergistic actuation in a complex environment.The demonstrated environmental adaptability highlighted a novel strategy for intelligent actuation in soft robotics.关键词
液晶弹性体/多重刺激响应/界面聚合/双层结构/柔性机器人Key words
liquid crystal elastomers/multiple-stimulus-responsiveness/interfacial polymerization/bilayer structure/soft robots引用本文复制引用
蔡雨洁,从怀萍..双层复合液晶弹性体的制备及光磁驱动性能[J].液晶与显示,2025,40(6):836-845,10.基金项目
国家自然科学基金(No.22171066)Supported by National Natural Science Foundation of China(No.22171066) （No.22171066）
