共聚物
甲基丙烯酸酯
材料科学
润湿
聚合物
化学工程
聚合
聚二甲基硅氧烷
涂层
高分子化学
水溶液
胶粘剂
接触角
有机化学
化学
纳米技术
复合材料
工程类
图层(电子)
作者
Jin‐Jin Li,Yin‐Ning Zhou,Zheng‐Hong Luo
标识
DOI:10.1016/j.cej.2017.04.074
摘要
Successful fabrication of mussel-inspired V-shaped copolymer based materials for pH controllable oil/water separation was reported. Triblock copolymer, polydimethylsiloxane-block-poly(2-hydroxyethyl methacrylate)-block-poly(2-(dimethylamino)ethyl methacrylate) (PDMS-b-PHEMA-b-PDMAEMA) was designed and synthesized through copper(0)-mediated reversible-deactivation radical polymerization (RDRP). Hydroxyl-containing PHEMA block enabled the covalent reaction to occur between polymer and polydopamine (PDA) functionalized substrates. The mixed polymer brushes of oleophilic/hydrophobic PDMS and pH-responsive PDMAEMA endowed the substrates with good pH responsive oil/water wettability and stability. As a proof of concept, the functionalized mesh can separate a range of different immiscible oil/water mixtures with high separation efficiency over 98.5% and high oil flux of 8800–9500 L h−1 m−2 and water flux of 7400–7800 L h−1 m−2. Additionally, the functionalized sponge realized reversible oil capture and release in aqueous media. Because dopamine through self-polymerization can form strong adhesive films on inorganic and organic substrates in alkalescence solution, the method used in current contribution would be also suitable for producing polymer brush functionalized intelligent materials based on other common substrates.
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