Abstract
The unusually broad physical and chemical property window of ionic liquids allows for a wide range of applications, which gives rise to the recent spring-up of ionic liquid-based functional materials. Via solvothermal copolymerization of a monomeric ionic liquid and divinylbenzene in the presence of a tissue paper in autoclave, we fabricated a flexible porous polymer/paper hybrid membrane. The surface areas of the hybrid membranes depend on the weight fraction of the copolymer impregnated inside the tissue paper. The as-prepared hybrid membrane shows controlled surface wettability in terms of ethanol wetting and ethanol removal by harsh drying condition. This unique property provides the hybrid membrane with switchable oil/water separation function, thus of practical values for real life application.
Highlights
IntroductionIonic liquids have been attractive recently because of their broad applications in the fields of chemical synthesis and materials science, including catalysis[27, 28], electrochemistry[29], green chemistry and clean energy[30,31,32,33], functional nanomaterials[34,35,36], etc
Oil/water separation techniques have attracted much interest to address the environmental and ecological concerns caused by the leakage of oil and industrial organic pollutants into aqueous surroundings[1,2,3,4]
The paper hybrid membranes (PPHMs) was tactfully prepared through solvothermal copolymerization of an ionic liquid monomer 1-ethyl-3-vinylimidazolium bromide (EVImBr) and divinylbenzene (DVB) in the presence of tissue papers in autoclave
Summary
Ionic liquids have been attractive recently because of their broad applications in the fields of chemical synthesis and materials science, including catalysis[27, 28], electrochemistry[29], green chemistry and clean energy[30,31,32,33], functional nanomaterials[34,35,36], etc. Their unique characteristics of facile tuneability of physical properties are useful in wettability control[37]. The wettability of the membrane changed repeatedly by solvent wetting and solvent removal at elevated temperature under vacuum, which was demonstrated to be useful in switchable oil/water separation
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