Comparison of PVDF porous membranes modified by two different methods using composite nano-particles |
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Authors: | ZHAO Qing SHI Wen-xin YU Shui-li LU Hui and LU Yan |
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Affiliation: | ZHAO Qing1,SHI Wen-xin1,YU Shui-li1,2,LU Hui1,LU Yan1(1.State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,Harbin 150090,China,2.State Key Laboratory of Pollution Control and Resource Reuse,Tongji University,Shanghai 200092,China) |
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Abstract: | To improve the hydrophilieity and anti-fouling performance in water treatment,beth entrapped method and deposited method were used to modify polyvinylidene fluoride(PVDF)porous membrane with composite Al2O3/TiO2 nano-particles.Neat PVDF membrane was prepared and its property was also compared with that of the modified membranes.Membrane permeation flux and anti-fouling performance were measured using a membrane cell.The contact angle between water and membrane surface was detected in order to denote the membrane hydrophilicity.Membrane morphology and surface structure were examined by atomic-force microscopy (AFM)and scanning electron microscopy(SEM).Experimental results showed that modified membranes had higher permeation fluxes than that of the neat PVDF membrane.The addition of uano-particles altered membrane surface morphology and increased surface roughness.Due to the hydrophilicity of nano-particles,however,the membrane anti-fouling performance was improved instead of worsened.The entrapped membrane exhibited better anti-fouling performance than the deposited membrane and the neat membrane. |
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Keywords: | PVDF membrane entrapped method deposited method composite nano-particles membrane fouling |
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