预处理对聚多巴胺改性聚丙烯微滤膜性能影响研究  

Effectsof pretreatment on the performance of polydopamine-modified polypropylene microfiltration membrane

作　　者：周蓉[1] 任鹏飞[1] 徐志康[1] 

机构地区：[1]浙江大学高分子科学与工程学系高分子合成与功能构造教育部重点实验室,杭州310027

出　　处：《膜科学与技术》2015年第1期56-63,共8页Membrane Science and Technology

基　　金：国家自然科学基金资助课题(50933006)

摘　　要：分别采用等离子体及乙醇浸润法对微滤膜进行预处理以改善聚多巴胺对聚丙烯微滤膜表面及孔道的改性效果,并对比了两种方法对聚多巴胺沉积量、膜纯水通量及表面形貌的影响.沉积密度和水通量测试表明,相对于等离子体法,乙醇预浸润法可以更好地改善聚多巴胺在微孔膜内的沉积行为.表面衰减全反射红外(ATR/FT-IR)、X射线光电子能谱(XPS)和场发射扫描电镜(FESEM)结果证实聚多巴胺可有效改性乙醇预浸润膜.能量色散X射线光谱(EDX)分析显示聚多巴胺完整且均匀地分布于膜孔道中.改性膜在为期27天的测试中表现出了较好的稳定性.此外,动态蛋白过滤实验表明,改性后膜的抗污染性能得到显著提升.Plasma and ethanol pretreatment methods were used, respectively,to improve the deposition of polydopamine（PDA） on the surface and in the pores of polypropylene microfiltration membrane. Detaild comparison was made between the two methods through deposited density, membrane morphology and pure water flux. Results of deposition density and water permeation show that the ethanol pretreatment method is better than the plasma one in improving the deposition behavior of PDA for this kind of membrane. ATR/FT-IR, XPS and FESEM analyses confirm that after ethanol pretreatment, PDA can modify the membranes much more efficiently. EDX result indicates PDA is uniformly distributed throughout the membrane. The performance of the modified membranes can last stable as long as 27 days. What/s more, the antifouling property can also be improved after PDA modification, revealed by the results of dynamic protein filtration experiments.

关 键 词：聚多巴胺 聚丙烯微孔膜 乙醇浸润预处理 等离子体预处理 

分 类 号：TQ316.6[化学工程—高聚物工业] TQ051.893