PLA-PEG-PLA嵌段共聚物合成及其共混改性聚乳酸中空纤维膜抗污染性能研究  

The influence of PLA-PEG-PLA block copolymers on the anti-fouling properties of PLA hollow fiber membranes

作　　者：沈鹏[1] 张秋吉[2] 杨昌玉[1] 陈顺权[1] 杜如虚[1] 

机构地区：[1]广州中国科学院先进技术研究所水科学研究中心,广州511458 [2]深圳大学化学与化工学院,深圳518060

出　　处：《膜科学与技术》2013年第6期58-63,70,共7页Membrane Science and Technology

摘　　要：合成制备了不同分子量的PLA-PEG-PLA嵌段共聚物,并应用1 H NMR对其进行测试表征.然后将共聚物作为亲水性添加剂,用自行研发的中空纤维膜纺丝机对应制备了不同的PLA共混中空纤维膜.对制成的中空纤维膜进行水通量、残留率、水接触角、抗污染性能等测试以及SEM观察,研究了该添加剂对PLA中空纤维膜各种性能的影响.结果发现,制成的中空纤维膜超滤性能优异,添加PLA-PEG-PLA嵌段共聚物会提高PLA中空纤维膜的抗污染性能,并且共聚物分子量越大,中空纤维膜的亲水性越好,抗污染性能越好.PLA-PEG-PLA block copolymers with different molecular weight （Mw） have been synthesized and characterized by NMR spectroscopy. The copolymers were used as a hydrophilic addition agent to prepare PLA hollow fiber membranes by a blending method. Many properties of the resulting material were tested, such as water permeability, residual properties, surface water contact angle, relative permeability, and BSA rejection. Samples were also analysed by scanning electron microscopy. The results showed that PLA-PEG-PLA block copolyers with larger Mw have higher anti-fouling properties.

关 键 词：聚乳酸 聚乳酸-聚乙二醇共聚物 亲水性 抗污染性能 

分 类 号：TQ028.8[化学工程]