A shape memory porous sponge with tunability in both surface wettability and pore size for smart molecule release

Recently, smart superwetting porous materials have aroused much attention, and it is well known that tunable surface wettability pore structure/size are extremely important for their functions. However, only one factor can be regulated on existing materials, which significantly restricts controllability, functions, applications. A new material was prepared by electrodepositing a layer of polypyrrole shape memory sponge, switchable superhydrophobicity/superhydrophilicity adjustable size within the range about 28 nm to 895 µm observed. Through synergistically tuning size, both ON/OFF water permeation accurate flux obtained. Meanwhile, we also applied sponge molecule release, diverse release manners with precise/smart controllability accomplished. This paper reports first time in wetting provides strategy preparation novel materials.