ZrO2纳米粒子原位杂化PVDF膜的制备及其抗污染性能

doi:10.3866/PKU.WHXB201310291

Abstract

Abstract:

Polymers used in porous membrane manufacture are highly susceptible to adsorption of organic foulants. In this study, a new method for in situ preparation of a poly(vinylidene fluoride) (PVDF) based hybrid membrane is reported. The strategy in this method is to combine an ion-exchange process with a traditional immersion precipitation process. A hydrous ZrO₂ sol was synthesized by the addition of anion-exchange resin to N,N-dimethylformamide (DMF) containing zirconyl chloride. A homogeneous ZrO₂/PVDF casting solution was then obtained by dissolving PVDF in the ZrO₂ sol. The presence and dispersion states of ZrO₂ nanoparticles in the resultant membrane matrix were determined using X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The results indicate that the ZrO₂ nanoparticles were well dispersed throughout the PVDF matrix, and the size of the formed nanoparticles was about 10-20 nm. The membrane formation mechanism was investigated based on the viscosity, precipitation kinetics, and membrane morphology. The results indicate that the introduction of ZrO₂ nanoparticles accelerates phase inversion of the casting solution. The membrane hydrophilicity was determined using contact angle measurements. The antifouling properties were examined using antifouling experiments. The results confirm that the presence of ZrO₂ nanoparticles improves the membrane hydrophilicity and reduces protein adsorption on the membrane. This method for in situ preparation of ZrO₂/PVDF hybrid membranes by combining an ion-exchange process with a traditional immersion precipitation process is valuable in the fabrication and applications of organic-inorganic hybrid membranes.

Key words: PVDF membrane, In situ preparation, Ion-exchange, ZrO₂ sol, Sol-gel process

PANG Rui-Zhi, LI Xin, LI Jian-Sheng, LU Zhuang-Yu, HUANG Cheng, SUN Xiu-Yun, WANG Lian-Jun. In situ Preparation and Antifouling Performance of ZrO₂/PVDF Hybrid Membrane[J]. Acta Phys. -Chim. Sin. 2013, 29(12), 2592-2598. doi: 10.3866/PKU.WHXB201310291

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In situ Preparation and Antifouling Performance of ZrO₂/PVDF Hybrid Membrane

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In situ Preparation and Antifouling Performance of ZrO₂/PVDF Hybrid Membrane