posted on 2019-04-09, 00:00authored byLiangwei Zhou, Tianjiao Ma, Tiantian Li, Xiaodong Ma, Jie Yin, Xuesong Jiang
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.