Novel polysulfone hybrid ultrafiltration membrane prepared with TiO2-g-HEMA and its antifouling characteristics
Novel polysulfone hybrid ultrafiltration membrane prepared with TiO2-g-HEMA and its antifouling characteristics
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TiO2-g-HEMA制备的新型聚砜杂化超滤膜及其防污特性
DOI：
10.1016/j.memsci.2013.02.009
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发表时间：
2013-06
期刊：
影响因子：
--
通讯作者：
Jiwei Zhang
中科院分区：
文献类型：
--
作者：
Guoliang Zhang;Shufei Lu;Liang Zhang;Qin Meng;Chong Shen;Jiwei Zhang
通过混合TiO2纳米颗粒和有机材料形成的杂化膜对于在广泛的应用中创造具有增强性能的新材料具有吸引力，例如高选择性渗透、良好的亲水性和优异的抗污染性。为了克服水处理过程中纳米粒子在膜中的团聚和纳米复合膜中纳米粒子的渗漏，增强膜的亲水性，通过在甲醇中原子转移自由基聚合（ATRP）工艺，以TiO2为原料生长出HEMA（甲基丙烯酸2-羟乙酯）的聚合物链。然后通过添加不同比例的TiO2（T膜）和TiO2-g-HEMA（HT膜）颗粒，通过浸没沉淀技术诱导相转化来制备杂化聚砜（PSF）膜。研究发现，改性纳米颗粒在减少片状膜中的颗粒团聚和结垢方面具有明显的改善。应用SEM、TEM、FTIR、EDS、接触角测角法以及水、BSA 和 EPS 的过滤实验等不同技术来表征和探索颗粒和膜的性能。与未改性的TiO2颗粒相比，改性的TiO2颗粒具有增强的亲水性，在有机溶剂和基体聚合物中具有更好的相容性和分散性。同样，HT膜在分离过程中表现出比纯PSF膜和T膜更优异的水通量和抗污染性能。
Hybrid membranes formed by blending TiO2nanoparticles and organic materials are attractive for creating new materials with enhanced properties such as high permselectivity, good hydrophilicity and excellent fouling resistance in a wide range of applications. In order to overcome the agglomeration of nanoparticles in membranes and leakage of nanoparticles from nanocomposite membranes in the water treatment process and enhance the hydrophilicity of membranes, polymer chains of HEMA (2-hydroxyethyl methacrylate) were grown from TiO2by the atom transfer radical polymerization (ATRP) process in methanol. The hybrid polysulfone (PSF) membranes were then prepared by adding different ratios of TiO2(T membranes) and TiO2-g-HEMA (HT membranes) particles via phase inversion induced by the immersion precipitation technique. The modification nanoparticles were found to provide obvious improvements in reducing the particles agglomeration and fouling in sheet membranes. Different techniques such as SEM, TEM, FTIR, EDS, contact angle goniometry and filtration experiments of water, BSA and EPS were applied to characterize and explore the performance of particles and membranes. Compared with unmodified TiO2particles, modified TiO2particles held enhanced hydrophilicity, better compatibility and dispersibility in organic solvent and matrix polymer. Similarly, the HT membranes exhibited superior water flux and anti-pollution performance in separation than the pure PSF membrane and T membranes.
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