摘要
以聚偏氟乙烯(PVDF)为膜材料,测定了不同温度下PVDF/DMAc、PVDF/DMF和PVDF/NMP溶液的混合参数,得出非溶剂沉淀能力大小为:甘油>DEG>PEG200>PEG400,并与Hansen溶解度的理论计算值进行了比较。此外,讨论了不同PEG400在混合溶剂中的比例以及不同添加剂对膜性能的影响;PEG400的加入,使膜的纯水通量、机械性能均有所提高,截留率保持不变;VAH、Tween80、PEG20000和成核剂使膜的纯水通量提高到100 L/(m2.h)以上,LiCl的加入对通量影响不大。
Using poly（vinylidene fluoride）（PVDF）as membrane material,the mixability parameters of PVDF/DMAc,PVDF/DMF and PVDF/NMP solutions were determined at different temperatures.The non-solvents precipitation ability was found in the following order： Glycerol＆gt;DEG＆gt;PEG200＆gt; PEG400.The results are compared with calculated values of Hansen solubility parameters.In addition,the effects of different contents of PEG400 and additives on flux,rejection and mechanical strength of the membranes are discussed.With the increasing of PEG400,the flux and mechanical strength are improved and the rejection is stable.VAH,Tw80,PEG20000 and nucleating agent can improve the flux over 100 L/（m2.h）,but LiCl almost has no effect on flux.
出处
《水处理技术》
CAS
CSCD
北大核心
2013年第3期63-66,共4页
Technology of Water Treatment
基金
上海市科技攻关计划(11DZ1205201)
