Fabrication of TiO2-modified polytetrafluoroethylene ultrafiltration membranes via plasma-enhanced surface graft pretreatment

被引：67

作者：

Qian, Yingjia ^{[1
]}

Chi, Lina ^{[1
,2
]}

Zhou, Weili ^{[1
]}

Yu, Zhenjiang ^{[1
]}

Zhang, Zhongzhi ^{[3
]}

Zhang, Zhenjia ^{[1
]}

Jiang, Zheng ^{[2
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Environm Sci & Engn, Shanghai 200240, Peoples R China

[2] Univ Southampton, Fac Engn & Environm, Southampton SO17 1BJ, Hants, England

[3] China Univ Petr, Coll Chem Engn, Beijing 102249, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2016年 / 360卷

关键词：

Ultrafiltration; Polytetrafluoroethylene membrane; Titanium dioxide (TiO2); Plasma-induced graft polymerization; ATOMIC LAYER DEPOSITION; TIO2; POLYMERIZATION; PVDF; EVOLUTION; FILMS; ACID; FTIR;

D O I：

10.1016/j.apsusc.2015.11.059

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Surface hydrophilic modification of polymer ultrafiltration membrane using metal oxide represents an effective yet highly challenging solution to improve water flux and antifouling performance. Via plasma-enhanced graft of poly acryl acid (PAA) prior to coating TiO2, we successfully fixed TiO2 functional thin layer on super hydrophobic polytetrafluoroethylene (PTFE) ultrafiltration (UF) membranes. The characterization results evidenced TiO2 attached on the PTFE-based UF membranes through the chelating bidentate coordination between surface-grafted carboxyl group and Ti4+. The TiO2 surface modification may greatly reduce the water contact angle from 115.8 degrees of the PTFE membrane to 35.0 degrees without degradation in 30-day continuous filtration operations. The novel TiO2/PAA/PTFE membranes also exhibited excellent antifouling and self-cleaning performance due to the intrinsic hydrophilicity and photocatalysis properties of TiO2, which was further confirmed by the photo-degradation of MB under Xe lamp irradiation. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：749 / 757

页数：9

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