Fabrication and characterization of a novel TiO2 nanoparticle self-assembly membrane with improved fouling resistance
Fabrication and characterization of a novel TiO2 nanoparticle self-assembly membrane with improved fouling resistance
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DOI：
10.1016/j.memsci.2008.10.049
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发表时间：
2009-01-20
影响因子：
9.5
通讯作者：
Du, Chun-Hui
中科院分区：
文献类型：
--
作者：
Li, Jian-Hua;Xu, You-Yi;Du, Chun-Hui
以超高分子量聚苯乙烯-马来酸酐/聚偏氟乙烯（SMA/PVDF）共混膜为材料，制备了一种新型TiO2纳米粒子自组装膜。通过控制四异丙醇钛的水解，预先制备了TiO2纳米颗粒溶液。采用透射电子显微镜（TEM）和x射线衍射仪（XRD）对直径（小于10 nm）和锐钛矿晶体结构进行了分析。将相转化法制备的SMA/PVDF共混膜浸入TiO2纳米粒子溶液中一周，制备TiO2自组装膜。用x射线光电子能谱（XPS）分析了膜表面的化学成分。用扫描电子显微镜（SEM）观察了膜的形态。最后，通过水接触角测试、静态蛋白质吸附实验和过滤实验，分别对膜的亲水性、蛋白质抗污性能和分子量切断（MWCO）进行表征。结果表明，与PVDF/SMA共混膜相比，TiO2自组装膜的渗透性和抗污染能力显著提高。(C) 2008 Elsevier B.V.版权所有
A novel TiO2 nanoparticle self-assembly membrane was prepared based on ultrahigh molecular weight poly(styrene-alt-maleic anhydride)/poly(vinylidene fluoride) (SMA/PVDF) blend membrane. TiO2 nanoparticle solution was beforehand prepared via the controlled hydrolysis of titanium tetraisopropoxide. The diameter (10 nm or less) and anatase crystal structure were analyzed using transmission electron microscopy (TEM) and X-ray diffraction (XRD). The SMA/PVDF blend membranes prepared by the phase inversion method were immersed into the TiO2 nanoparticle solution for a week to produce TiO2 self-assembly membranes. The chemical compositions in membrane surface were analyzed by X-ray photoelectron spectroscopy (XPS). The membrane morphologies were measured by scanning electron microscopy (SEM). Finally, the membrane hydrophilicity, protein anti-fouling property and the molecular weight cutoff (MWCO) were characterized by water contact angle measurement, static protein absorption and filtration experiments, respectively. It is demonstrated that, in comparison to PVDF/SMA blend membrane, the permeability and anti-fouling ability of TiO2 self-assembly membranes were significantly improved. (C) 2008 Elsevier B.V. All rights reserved.