摘要
分3步对聚偏氟乙烯(PVDF)膜进行亲水改性,首先采用碱液处理脱除PVDF微孔膜表面的氟化氢(HF),然后通过热聚合接枝在PVDF微孔膜上接枝丙烯酸(AA),最后通过酯化反应在PVDF-g-AA链上酯化聚乙二醇PEG(200),以改善PVDF膜亲水性.优化了碱液处理条件对PVDF膜接枝率的影响,并研究了不同接枝率对膜性能的影响.测定了改性前后膜的化学结构、表面接触角、水通量和蛋白吸附等.结果表明,随着接枝率的增加(≤15wt%),改性后膜表现出优异的抗污染性和亲水性.
The surface modification of poly （vinylidene fluoride） （PVDF） membrane was performed via a three-step process. Firstly, the PVDF membrane was treated by alkaline solution to remove the HF, then the acrylic acid（AA） was grafted onto the membrane surface via thermal grafting polymerization, finally, the polyethylene glycol （PEG） was immobilized on the membrane by esterification. The effect of the conditions of the alkaline treatment on the grafting ratio of PVDF membrane was evaluated. And the performance of the prepared PVDF membrane with different grafting ratio was examined. Chemical structure, surface contact angle, water flux, protein adsorption and so on were also measured to characterize the surface modified PVDF membrane. Results showed that with the increase of the grafting ratio （≤ 15wt%）, the modified PVDF membranes exhibited superior anti-fouling performance and hydrophilicity.
出处
《上海应用技术学院学报（自然科学版）》
2015年第1期44-48,共5页
Journal of Shanghai Institute of Technology: Natural Science
基金
国家自然科学基金资助项目(51172144)
上海市联盟计划资助项目(LM201249)
关键词
聚偏氟乙烯
碱处理
热聚合接枝
亲水性
抗污染性
poly （ vinylidene fluoride ）
alkaline treatment
thermal polymeritation graftinghydrophilicity
anti-fouling performance
