Durable underwater super-oleophobic/super-hydrophilic conductive polymer membrane for oil-water separation

被引：73

作者：

Chen, Na ^{[1
]}

Chen, Sian ^{[1
]}

Yin, Hang ^{[1
,2
]}

Zhu, Benfeng ^{[1
,3
]}

Liu, Mengyan ^{[1
]}

Yang, Yumeng ^{[1
]}

Zhang, Zhao ^{[3
]}

Wei, Guoying ^{[1
]}

机构：

[1] China Jiliang Univ, Coll Mat & Chem, Hangzhou 310018, Zhejiang, Peoples R China

[2] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Liaoning, Peoples R China

[3] Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China

来源：

WATER RESEARCH | 2023年 / 243卷

基金：

中国国家自然科学基金;

关键词：

Conductive polymer; Durability; Electrochemical oxidation; Underwater super-oleophobic; Oil -water separation; POLYPYRROLE; POLYANILINE; LIGNOSULFONATE; ENHANCEMENT; MESH; COMPOSITES; THICKNESS; BEHAVIOR; STEEL; DFT;

D O I：

10.1016/j.watres.2023.120333

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Oily sewage has made serious impact on environment and people's life, and its treatment has become a global problem to be urgently solved. Oil-water separation has been considered to be an effective method to treat oily sewage at present. In this work, an underwater super-oleophobic/super-hydrophilic membrane with oil-water separation and self-cleaning properties was fabricated by electrochemical oxidation of sodium lignosulfonate doped polypyrrole. The membrane showed super-hydrophilicity for water-removal in air and superhydrophilicity for oil-removal underwater in both oxidation and reduction states. The oil-water separation efficiency of the membranes for different organics exceeded 98.44%, no matter in oxidation or reduction state. Moreover, the membrane still exhibited excellent performance in terms of the oil-water separation efficiency and flux after 70 cycles, which were greater than 97.18% and 70.14 L(.)m(-2.)h(-1), respectively. Simultaneously, through exploration of the mechanism, it was found that the larger anion kept intact in the membrane during the redox process, which made the stability of composition and performance. Thus, the membrane with advantageous properties, including underwater super-oleophobic/super-hydrophilicity, high oil-water separation efficiency, high circulating rate and stability, has significant potential in separation and collection of oily sewage.

引用

页数：11

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