Zhou Liangwei, Ma Tianjiao, Li Tiantian, Ma Xiaodong, Yin Jie, Jiang Xuesong
School of Chemistry & Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, State Key Laboratory for Metal Matrix Composite Materials , Shanghai Jiao Tong University , Shanghai 200240 , P.R. China.
School of Physical Science and Technology , Shanghai Tech University , Shanghai 201210 , P.R. China.
ACS Appl Mater Interfaces. 2019 May 1;11(17):15977-15985. doi: 10.1021/acsami.8b22216. Epub 2019 Apr 18.
Dynamic micro-/nanowrinkle patterns with response to multienvironmental stimuli can offer a facile method for on-demand regulation of surface properties, thus allowing for generation of a smart surface. Here a practical yet robust strategy is described to fabricate redox, light and thermal responsive wrinkle by building dynamic double interpenetrating polymer network (IPN) as the top layer for a typical bilayer system. IPNs were constructed through the photochemical reaction of a mixture comprised of light-sensitive anthracene-containing polymer (PAN) and redox-sensitive disulfide-containing diacrylate monomer (DSDA). Thanks to the dynamic covalent reversible C-C bond in PAN and S-S bond in DSDA, the morphology of wrinkled surface not only can be reversibly and precisely (micrometer scale) tailored to all kinds of complicated hierarchical pattern permanently, but also can be controlled temporarily by irradiation of near-infrared light (NIR). A sine wave model is proposed to investigate the dynamics of real-time reversible wrinkle evolution. This general approach based on IPN allows independent multistimuli control over wettability and optical properties on the wrinkled surface, thus, presents a considerable alternative to implement a smart surface.
对多环境刺激做出响应的动态微/纳米皱纹图案可为按需调节表面性质提供一种简便方法，从而实现智能表面的生成。本文描述了一种实用且稳健的策略，通过构建动态双互穿聚合物网络（IPN）作为典型双层系统的顶层来制备对氧化还原、光和热有响应的皱纹。IPN是通过由含光敏蒽聚合物（PAN）和含氧化还原敏感二硫化物的二丙烯酸酯单体（DSDA）组成的混合物的光化学反应构建而成。由于PAN中的动态共价可逆C-C键和DSDA中的S-S键，皱纹表面的形态不仅可以永久地可逆且精确地（微米尺度）定制为各种复杂的分级图案，还可以通过近红外光（NIR）照射进行临时控制。提出了一个正弦波模型来研究实时可逆皱纹演变的动力学。这种基于IPN的通用方法允许对皱纹表面的润湿性和光学性质进行独立的多刺激控制，因此，为实现智能表面提供了一种相当不错的选择。
