Reprocessable Porous Poly(ionic liquid) Membranes derived from Main-chain Polyimidazolium
Yongneng Wu, Weiyi Zhang, Jiayin Yuan
Index: 10.1016/j.eurpolymj.2018.03.035
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Abstract
A main-chain polyimidazolium poly(ionic liquid) was obtained via one-step Debus-Radziszewski (DB) reaction, which was followed by anion exchange to afford the hydrophobic analogue. After confirmation of their chemical structures by nuclear magnetic resonance (NMR) spectroscopy and attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy, their thermal behavior and solubility were fully characterized. Via interpolyelectrolyte complexation with poly(acrylic acid), a new main-chain poly(ionic liquid)-based porous membrane was constructed. Upon tuning molecular weight of poly(acrylic acid), the average pore size of membranes was found to vary from 100 to 500 nm. Eventually, this porous membrane was proven to be reprocessable through treatment with a high ionic salt solution, which offers a simple but efficient method to reuse porous polymer membranes.