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Study on morphology and property of PVDF hybrid membrane modified by functionalized TiO2 nanotubes

Authors： SONG Xue1, WEN Chen1, SUN Wei1, XIAO Changfa2

Units： 1. School of Environmental and Chemical Engineering, Tianjin Polytechnic University; 2. State Key Laboratory of Membrane Materials and Processes, Tianjin 300160, China

KeyWords： TiO2 nanotubes；polyvinylidence fluoride；hybrid membrane；hydrophilicity；green cleaning

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2012,32(4):11-16

Abstract：

The PVDF/FTNT hybrid ultrafiltration membranes were prepared by phase-inversion method with functionalized TiO2 nanotubes(FTNT) dispersed uniformly in the PVDF casting solution. The microstructure, separation performance and antifouling ability of such PVDF/FTNT hybrid membranes were investigated using SEM, contact angle, cross flow filtration, and antifouling measurements, and efficient cleaning methods for the fouled membrane were also observed in detail. The results indicate that the hybrid membranes exhibit differences in microstructure and properties due to a certain content of functionalized TiO2 nanotubes addition. At mass fraction 1% FTNT, the thickness of skin layer decreased while fine interfacial micropores increased, meanwhile the hybrid membrane had excellent water permeability, hydrophilicity, anticompaction and good antifouling ability with somewhat elevated retention for HA solution. In addition, chemical cleaning with 0.01mol/L NaOH and sunlight/water cleaning could effectively recover the permeance of membrane, and using the latter the flux recovery of hybrid membranes achieved above 90%.

Funds：

国家自然科学基金(51073120)；天津市科技计划项目(10SYSYJC27900)

AuthorIntro：

宋雪(1987-10)，女，湖北武汉人，硕士研究生，主要从事膜材料和水处理研究，E-mail:songxue1020@163.com

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