膜科学与技术

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Modification of Thin-film Composite Forward Osmosis membrane active layer using organic-inorganic hybrid TiO2 nanoparticles

Authors： Kuang Wu1,2，Kang Guodong1，Liu Zhongnan1,2，Zhou Meiqing1，Liu Dandan1，Cao Yiming1,＊

Units： 1. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China.

KeyWords： nano-TiO2; forward osmosis; internal concentration polarization; surface modification

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2016,36(6):25-31

Abstract：

The organic-inorganic hybrid titanium dioxide (TiO2) nanoparticles were synthesized by grafting poly (2-hydroxyethyl methacrylate) (PHEMA) to the surface via radical polymerization and used as additive to fabricate the active layer of flat-sheet thin film composite forward osmosis (TFC-FO) membranes by interfacial polymerization. The influence of TiO2-PHEMA loadings on properties and structure of active layer and membrane performance were investigated. The results showed that the addition of TiO2-PHEMA had significant influences on both hydrophilicity and surface roughness. When the content of nanoparticles increased to 0.1 wt%, the water contact angle decreased to 47.7°, while the surface roughness increased to 99.5 nm. The water flux increased from 6.8 L/(m2•h) and 12.2 L/( m2•h) to 23.6 L/( m2•h) and 39.2 L/( m2•h) tested under the AL-FS mode (Active layer against the feed solution) and AL-DS mode (Active layer against the draw solution), respectively. And all the composite membranes have a relative high rejection to NaCl (R>90%).

Funds：

基金项目：国家自然科学基金( 批准号: 21206157)、国家科技支撑计划项目( 批准号: 2014BAI11B13)和大连科技基金（批准号：2013J21DW030）资助.

AuthorIntro：

第一作者简介：况武(1989.1-)，男，江西高安人，博士研究生，中国科学院大连化学物理研究所，从事膜技术研究．＊通讯作者，E-mail: ymcao@ dicp.ac.cn

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