Preparation of poly(vinylidene fluoride)(pvdf) ultrafiltration membrane modified by nano-sized alumina (Al2O3) and its antifouling research
Preparation of poly(vinylidene fluoride)(pvdf) ultrafiltration membrane modified by nano-sized alumina (Al2O3) and its antifouling research
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DOI：
10.1016/j.polymer.2005.05.155
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发表时间：
2005-08
期刊：
影响因子：
4.6
通讯作者：
Lu Yan;Yu Li;C. Xiang
中科院分区：
文献类型：
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作者：
Lu Yan;Yu Li;C. Xiang
有机-无机复合膜是由纳米氧化铝颗粒均匀分散在聚偏氟乙烯溶液（19%聚合物重量）中形成的。采用相转化法制备膜，并通过超滤实验对膜的水通量、截留分子量进行表征。采用接触角测量法测量水与膜表面的接触角，以表征膜表面亲水性的变化。用扫描电镜（SEM）和透射电镜（TEM）分别观察了膜的截面结构、膜表面的多孔分散性和膜中纳米粒子的分布。考察了纳米Al 2 O3粒子在聚合物膜液中的浓度对膜的渗透性能、膜结构和渗透性能的影响。实验结果表明，纳米粒子的加入使Al 2 O3-PVDF复合膜的表面和内在性能发生了显著的变化。
Organic–inorganic composite membranes are formed by nano-sized alumina particles uniformly dispersed in the poly(vinylidene fluoride) solution (19% polymer weight). Membranes were prepared by phase inversion process and were characterized by ultrafiltration (UF) experiments in terms of water flux, molecular weight cut-off for the wet membranes. Contact angle between water and the membrane surface were measured by contact angle measurement in order to characterize the hydrophilicity changing of the membrane surface. The cross-sectional structures, porous dispersion in membranes surface and nanometer particles distribution in the membrane were examined by scanning electron microscopy (SEM) and transmission microscopy (TEM), respectively. The effect of nanometer Al2O3particles concentration in the polymer dope on the permeation properties, membrane structures and antifouling performances were examined. The experimental results indicate that Al2O3–PVDF composite membranes exhibit significant differences in surface and intrinsic properties due to nanometer particles addition.