Effect of Polyethersulfone Molecular Weight on Structure and Performance of Ultrafiltration Membranes
Effect of Polyethersulfone Molecular Weight on Structure and Performance of Ultrafiltration Membranes
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聚醚砜分子量对超滤膜结构和性能的影响
DOI：
10.1021/ie100199h
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发表时间：
2010-09
影响因子：
4.2
通讯作者：
施柳青
中科院分区：
文献类型：
--
作者：
陆晓峰;卞晓锴;周晨;侯铮迟;刘忠英;李良;施柳青
选择三种不同分子量的聚醚砜（PES），分别以聚乙烯吡咯烷酮（PVP）和n -甲基-2-吡咯烷酮（NMP）为添加剂和溶剂，采用非溶剂诱导相分离法制备超滤膜。在PVP和PES浓度固定的情况下，通过超滤实验、膜厚度和孔隙率测量、扫描电镜和破裂强度测量，研究了PES分子量对制备的不对称膜结构和性能的影响。研究发现，PES分子量的增加会导致皮层孔径增大，膜孔隙率降低，膜的强度提高，渗透率提高，截留率降低。根据凝胶渗透色谱法、云点滴定法和同轴圆柱粘度计测得的PES分子量、三元相图和铸液粘度的实验数据，从热力学、动力学和聚合物聚集体尺寸的角度分析了膜结构形成的根本原因。
Polyethersulfones (PES) with three different molecular weights were chosen to prepare ultrafiltration (UF) membranes by the nonsolvent induced phase separation method using polyvinylpyrrolidone (PVP) and N-methyl-2-pyrrolidone (NMP) as additive and solvent, respectively. The effect of PES molecular weight on the structure and performance of the prepared asymmetric membranes was investigated by means of UF experiments, measurements of membrane thickness and porosity, scanning electron microscopy, and the measurement of bursting strength, given fixed PVP or PES concentrations. It was found that increasing PES molecular weight would lead to a larger pore size in the skin layer but lower membrane porosity, and would result in membranes with higher strength, higher permeability, and lower rejection. Based on the experimental data of PES molecular weight, ternary phase diagram, and cast solution viscosity obtained from gel permeation chromatography, cloud point titration, and coaxial cylinder viscometer measurements, respectively, the underlying causes of membrane structures were accounted for from the combined perspective of thermodynamics and kinetics and polymer aggregate dimensions.
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影响因子：
9.5
作者：
M. Ulbricht;M. Riedel;U. Marx
通讯作者：
M. Ulbricht;M. Riedel;U. Marx
DOI：
--
发表时间：
2005
期刊：
--
影响因子：
--
作者：
J. Barzin;S. S. Madaeni-S.;Mirzadeh Hamid
通讯作者：
J. Barzin;S. S. Madaeni-S.;Mirzadeh Hamid
DOI：
10.1002/(sici)1099-0488(199703)35:4
发表时间：
1997-03
期刊：
Journal of Polymer Science Part B
影响因子：
--
作者：
Y. Hsieh;Xiaoping Hu
通讯作者：
Y. Hsieh;Xiaoping Hu
影响因子：
3
作者：
Jo-Yu Wang;J. F. Tung;M. Y. A. Fuad;P. Hornsby
通讯作者：
Jo-Yu Wang;J. F. Tung;M. Y. A. Fuad;P. Hornsby
影响因子：
2.5
作者：
T. Miyano;T. Matsuura;S. Sourirajan-
通讯作者：
T. Miyano;T. Matsuura;S. Sourirajan-