Study of the characteristics and the performance of self-made nanoporous polyethersulfone membranes
Study of the characteristics and the performance of self-made nanoporous polyethersulfone membranes
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DOI：
10.1016/j.polymer.2006.03.048
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发表时间：
2006-05-03
期刊：
影响因子：
4.6
通讯作者：
Van der Bruggen, B
中科院分区：
文献类型：
--
作者：
Boussu, K;Vandecasteele, C;Van der Bruggen, B
为了更好地了解商业聚醚砜膜的性能并验证制造商提供的有限信息，在本研究中通过使用DIPS技术（扩散诱导相分离）制备聚醚砜（PES）膜。在这个过程中，许多条件影响最终的膜结构。除了溶剂（二甲基甲酰胺（DMF）或N-甲基吡咯烷酮（NMP））的选择之外，聚合物的浓度和相对空气湿度是最关键的。优化这些因素导致可重复的膜，其特征在于疏水性，粗糙度，表面电荷和截留分子量（MWCO）。通过对不带电和带电组分的水溶液进行错流过滤实验来研究其性能。虽然自制膜的特征在于与商业聚醚砜纳滤膜相比具有更大的MWCO，但在分别过滤带负电荷组分和带正电荷组分的情况下，自制膜的截留率几乎等于或甚至高于商业膜。自制膜对带正电组分的高截留率可用吸附实验或过滤前后表面电荷的测定来解释。(c)2006爱思唯尔有限公司版权所有。
Polyethersulfone (PES) membranes were prepared in this study by using the DIPS technique (diffusion induced phase separation) in view of a better insight into the performance of commercial polyethersulfone membranes and a verification for the limited information given by the manufacturer. During this process, a lot of conditions influence the final membrane structure. Beside the choice of the solvent (dimethylformamide (DMF) or N-methyl-pyrrolidone (NMP)), it was shown that the concentration of the polymer and the relative air humidity are the most crucial ones. Optimizing these factors led to reproducible membranes, which were characterized for hydrophobicity, roughness, surface charge and molecular weight cut-off (MWCO). The performance was studied by doing cross-flow filtration experiments with aqueous solutions of uncharged and charged component. Although the self-made membranes were characterized by a larger MWCO in comparison with commercial polyethersulfone nanofiltration membranes, the retention for the self-made membranes was almost equal to or even higher than the commercial membranes in the case of filtrating negatively, respectively, positively charged component. The high retention of the self-made membranes for positively charged component can be explained by adsorption experiments or by surface charge measurements before and after filtration. (c) 2006 Elsevier Ltd. All rights reserved.