聚醚砜含量对纤维素/聚醚砜中空纤维血液透析膜结构和性能的影响

以离子液体氯代1-烯丙基-3-甲基咪唑(AMIM]Cl)为溶剂来纺制纤维素/聚醚砜共混中空纤维膜,考察了聚醚砜含量对中空纤维膜结构与性能的影响。采用扫描电子显微镜(SEM)对膜内、外表面形态结构进行了观察,测试了中空纤维膜的水通量、截留率等渗透性能,最大拉伸强度、断裂伸长率、杨氏模量等力学性能以及透析性能。结果表明:随着聚醚砜含量的增加,中空纤维膜外表面孔洞结构变大,内表面结构变得更加疏松,膜孔隙率与水通量升高,最大拉伸强度、断裂伸长率、杨氏模量等力学性能则逐渐下降;对尿素的清除效率逐渐提升;对溶菌酶和牛血清白蛋白的清除效率逐渐增大,在聚醚砜含量为13%时分别达到最大值24.05%和19.91%。

Effects of PES Content on the Structures and Properties of Cellulose/ PES Blend Hollow Fiber Membranes

The cellulose/PES blend hollow fiber membranes were spun using ionic liquid 1-ally-3methylimidazolium chloride(Cl) as solvent.Influence of PES content on the structure and properties of the blend hollow fiber membranes were investigated.The morphologies of the inner-and outer-surfaces of the membranes were studied using scanning electron microscopy(SEM).Furthermore,permeation properties and mechanical properties of the membranes,including water flux,retention rate,ultimate tensile strength(UTS),elongation at break,Young’s modulus were also tested.The results indicate that,with the increase of PES content,the pores become larger and the inner surfaces are more irregular.Contrary to increasing porosity and water flux,ultimate tensile strength,elongation at break,Young’s modulus show a decreasing tendency.The removal efficiency to urea,lysozyme and bovine serum albumin(BSA) are gradually enhanced,and the removal efficiencies to lysozyme and BSA reache maxima of 24.05% and 19.91%,respectively,when the PES content is 13%.