摘要
Well-defined poly(ionic liquid) brushes with tunable wettability are successfully synthesized via nitroxide-mediated radical polymerization.X-ray photoelectron spectroscopy,attenuated total reflection infrared spectroscopy and static water contact angle measurements are used to monitor each step.Ellipsometry,nuclear magnetic resonance(1H and 13C) spectra and gel permeation chromatographic measurements reveal that there is a linear increase in polymer film thickness with polymerization time,indicating that chain growth from the surface is a controlled/"living" polymerization.The surface morphology was measured by atomic force microscopy.Moreover,the surfaces of the poly(ionic liquid) brushes with tunable wettability and reversible switching between hydrophilicity and hydrophobicity can be easily achieved by counteranion exchange.
Well-defined poly （ionic liquid） brushes with tunable wettability are successfully synthesized via nitroxide-mediated radical polymerization. X-ray photoelectron spectroscopy, attenuated total reflection infrared spectroscopy and static water contact angle measurements are used to monitor each step. Ellipsometry, nuclear magnetic resonance （1H and 13C） spectra and gel permeation chromatographic measurements reveal that there is a linear increase in polymer film thickness with polymerization time, indicating that chain growth from the surface is a controlled/＂living＂ polymerization. The surface morphology was measured by atomic force microscopy. Moreover, the surfaces of the poly （ionic liquid） brushes with tunable wettability and reversible switching between hydrophilicity and hydrophobicity can be easily achieved by counteranion exchange.
基金
supported by the National Natural Science Foundation of China (20873101)
the Science Investigation Projects for Universities of Gansu Province, and the Key Laboratory of Eco-Environment Related Polymer Materials of MOE,China
关键词
自由基聚合
离子液体
润湿性
可调谐
合成
NMP
表面形貌测量
X射线光电子能谱
poly（ionic liquid） brushes, tunable wettability, grafted modification, silicon surface, surface-initiated nitroxide-mediatedradical polymerization
