Hydrophobic/superhydrophobic reversible smart materials via photo/thermo dual-response dynamic wrinkled structure

摘要: Abstract Superhydrophobic materials have attracted considerable scientific interest owing to their excellent properties such as self-cleaning ability, which are attractive for real-world applications. However, challenges still exist in realising smart superhydrophobic surfaces with reversible properties. Although there many studies on surfaces, most of them tedious preparation processes or difficult achieve, the structure requires continuous stimuli be maintained. Hence, we propose a novel and simple strategy obtain superhydrophobic/hydrophobic materials. Anthracene-terminated photo/thermo dual-response polyurethane was prepared dynamic substrate whose wrinkled could appear disappear reversibly through dimerisation depolymerisation anthracene groups. Thereafter, modified SiO2 sol applied hydrophobic coating because aggregation produces micro-nano structures surface wrinkles. The good synergistic effects wrinkles nanoparticles enhance roughness, These can convert into wetting state, induced by UV exposure heating, both states stable under normal conditions. Moreover, these properties, self-cleaning, durability, environmental friendliness. method used fabricate also has potential applications other areas triboelectric nanogenerator switching adhesion, microfluidic channels.