基于共轭共聚物网络的动态褶皱的多重调控

Multiple regulation of dynamic wrinkles based on conjugated copolymer network

环境刺激响应的动态微/纳米图案可调节表面特性,为智能表面的按需制备提供了有效的解决方案.我们合成了一种光响应共轭聚合物(P(AEG-AAzo-AAN)),基于简单的策略构建了光驱动的双层动态褶皱图案系统.聚合物所含蒽侧基的光二聚和偶氮苯侧基的光异构化可以分别调节交联密度和应力松弛,从而决定褶皱的产生/擦除,实现多级次褶皱的按需制备.硫酸掺杂后,褶皱图案能够对湿度做出响应,薄膜变为半导体.这种多重响应动态褶皱可能在智能显示器和防伪标签中获得潜在的应用.

Dynamic micro/nanoscale patterns responding to environmental stimuli provide an effective solution for tuning surface properties to achieve on-demand smart sur-faces.Herein,we propose a simple and robust strategy for constructing multiple-responsive dynamic wrinkle patterns using a conjugated copolymer(P(AEG-AAzo-AAN)).Photo-dimerization of anthracene and photoisomerization of azo-benzene regulate the crosslinking density and stress relaxation ability,respectively,which determine wrinkle generation/erasure and realize the fabrication of on-demand hierarchical wrinkles.Moreover,using a sulfuric acid dopant,the wrinkle patterns are further endowed with humidity responsiveness and semiconductivity.These multiple-responsive dynamic wrinkle patterns are promising for smart displays and anti-counterfeiting tags.