利用非溶剂相转化法(NIPS),以N,N-二基乙酰胺(DMAc)为溶剂,聚乙烯吡咯烷酮(PVPK30)和一水合氯化锂(LiCl·H_2O)为混合添加剂,改变PVPK30-LiCl·H_2O配比得到不同性能和结构的聚偏氟乙烯(PVDF)膜.考察了不同种类添加剂(PVP、LiCl·H_2O、H_2O和PEG200)及不同配比的PVPK30-LiCl·H_2O添加剂对PVDF成膜分相延时时间、分相速率的影响.实验结果表明,采用PVPK30为添加剂,铸膜液呈瞬时分相行为,膜通量很大;增大混合添加剂中PVPK30/LiCl·H_2O的比例,会增加液液分相速率,使膜结构中的大孔贯通整个膜结构.
Porous poly (vinylidene fluoride) (PVDF) membranes were prepared via non-solvent induced phase separation methods (NIPS). Using N, N-dimethylacetamide (DMAc) as a solvent, the effects of polyvinylpyrrolidone (PVPK30)-lithium chloride (LiCl·H_2O) mixed additives on PVDF membrane morphology and properties were investigated. The effect of different additives (PVP, LiCl·H_2O, H_2O, PEG200 and PVPK30-LiCl·H_2O) on the demixing delay-time and demixing rate of PVDF membranes were studied. The experimental results illustrate that using PVPK30 an instantaneous demixing and high flux membrane is obtained. More PVPK30 in PVPK30-LiCl·H_2O mixed additives can accelerate the rate of liquid-liquid demixing. Therefore, the macroporous structure is developed completely.
参考文献
| [1] | 顾明浩,张军,王晓琳.聚偏氟乙烯微孔膜制备方法研究进展[J].工业水处理,2006(02):5-9. |
| [2] | 杨晓天,魏永明,许振良.PVDF成膜过程中溶剂分布的模型计算及其大孔形成机理[J].华东理工大学学报（自然科学版）,2007(05):610-614. |
| [3] | Jing-Feng Li;Zhen-Liang Xu;Hu Yang .Microporous polyethersulfone membranes prepared under the combined precipitation conditions with non-solvent additives[J].Polymers for advanced technologies,2008(4):251-257. |
| [4] | Lin DJ.;Beltsios K.;Chang CL.;Cheng LP. .Fine structure and formation mechanism of particulate phase-inversion poly(vinylidene fluoride) membranes[J].Journal of Polymer Science, Part B. Polymer Physics,2003(13):1578-1588. |
| [5] | Buonomenna MG;Macchi P;Davoli M;Drioli E .Poly(vinylidene fluoride) membranes by phase inversion: the role the casting and coagulation conditions play in their morphology, crystalline structure and properties[J].European Polymer Journal,2007(4):1557-1572. |
| [6] | Enrica Fontananova;Johannes C.Jansen;Alessandra Cristiano;Efrem Curcio;Enrico Drioli .Effect of additives in the casting solution on the formation of PVDF membranes[J].Desalination: The International Journal on the Science and Technology of Desalting and Water Purification,2006(1/3):190-197. |
| [7] | 杨晓天,许振良,魏永明.添加剂对PVDF凝胶速率和膜性能的影响[J].膜科学与技术,2007(04):26-30. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%