依据文献报道的PES/NMP(聚醚砜/N-甲基吡咯烷酮)制膜体系的浊点数据和特性粘数,从传统的宏观热力学和铸膜液中高分子的构象两方面讨论了非溶剂添加剂的种类和加入量(邻近比)对PES/NMP铸膜液性质的影响.非溶剂添加剂改变了PES/NMP铸膜液的热力学性质和PES分子的构象.这种效应依非溶剂种类的不同而显著不同.非溶剂添加剂对铸膜液性质的影响不仅表现在种类的差别上,也和无因次量——邻近比密切相关.邻近比可以表征铸膜液的热力学状态和混合溶剂的质量.铸膜液的邻近比增大,混合溶剂的质量下降,铸膜液的热力学稳定性降低,PES分子的构象也由舒展状态逐渐收缩.聚合物分子的构象对成膜过程的影响十分显著,研究成膜机理不能忽视非溶剂添加剂对铸膜液中高分子构象的影响.
参考文献
| [1] | 何涛,江成璋.聚醚砜微孔膜制备中非溶剂添加剂作用研究[J].膜科学与技术,1998(03):43-48. |
| [2] | Zhang H.;Sourirajan S.;Lau WWY. .FACTORS INFLUENCING THE PRODUCTION OF POLYETHERSULFONE MICROFILTRATION MEMBRANES BY IMMERSION PHASE INVERSION PROCESS[J].Separation Science and Technology,1995(1):33-52. |
| [3] | I.M. Wienk;R.M Boom;M.A.M. Beerlage;A.M.W. Bulte;C.A. Smolders;H. Strathmann .Recent advances in the formation of phase inversion membranes made from amorphous or semi-crystalline polymers[J].Journal of Membrane Science,1996(2):361-371. |
| [4] | Altena F W;Smolders C A .Calculation of liquid-liquid phase separation in a ternary system of a polymer in a mixture of a solvent and a nonsolvent[J].Macromolecules,1982,15(06):1491-1497. |
| [5] | Yilmaz L;McHugh A J .Analysis of nonsolvent-solvent-polymer phase diagrams and their relevance to membrane formation modeling[J].Journal of Applied Polymer Science,1986,31(04):997-1018. |
| [6] | Li S G;Jiang C Z;Zhang Y Q .The investigation of solution thermodynamics for the polysulfone-DMAC-water system[J].Desalination,1987,62:79-88. |
| [7] | Zeman L;Tkacik G .Thermodynamic analysis of a membrane-forming system H2O/N-methyl-2-pyrrolidone/polyethersulfone[J].Journal of Membrane Science,1988,36:119-140. |
| [8] | Li Z S;Jiang C Z .Determination of the nonsolvent-polymer interaction parameter χ13 in the casting solutions[J].Journal of Membrane Science,2000,174(01):87-96. |
| [9] | Swinyard B T;Barrie J A .Phase separation in non-solvent/dimethylformamide/polyethersulphone and non-solvent/dimethylformamide/polysulphone systems[J].British Polymer Journal,1988,20(04):317-321. |
| [10] | Lau W W Y;Guiver M D;Matsuura T .Phase separation in polysulfone/solvent/H2O and polyethersulfone/solvent/H2O systems[J].Journal of Membrane Science,1991,59(02):219-227. |
| [11] | Li S G .Preparation of hollow fiber membrane for gas separation[D].Enschede:University of Twente,1994. |
| [12] | 赵长生,欧阳庆,钟银屏,乐以伦,黄小华.聚醚砜制膜液的相分离Ⅰ.三元体系[J].水处理技术,1996(04):195. |
| [13] | P. van de Witte;P.J. Dijkstra;J.W.A. van den Berg;J. Feijen .Phase separation processes in polymer solutions in relation to membrane formation[J].Journal of Membrane Science,1996(1/2):1-31. |
| [14] | Singh V B;Barrie J A;Walsh D J .Sorption of water in polyethersulfone/poly(ethylene oxide) blends[J].Journal of Applied Polymer Science,1986,31(01):295-299. |
| [15] | Gmehling J;Onken U;Arlt W.Vapor-liquid equilibrium data collection,DECHEMA chemistry data series[M].Frankfurt:DECHEMA(supplied by Prof.Gmehling),1977 |
| [16] | Charlier Y;Godard P;Daoust D .Molecular mass determination and dilute solution properties of polymer from bisphenols and 4,4'-dichlorodiphenyl sulfone[J].Macromolecules,1994,27(09):3604-3610. |
| [17] | 何曼君,封毅,王玮.聚苯醚砜在二甲基甲酰胺中稀溶液性质的研究（Ⅰ）[J].功能高分子学报,1988(01):46-53. |
| [18] | Tam C M .Polysulfone membranes (3) Performance evaluation of polyethersulfone PVP membranes[J].Separation Science and Technology,1993,28(03):2621-2633. |
| [19] | Barton A F M.CRC handbook of solubility parameters and other cohesion parameters[M].Florida:CRC Press Inc,1991 |
| [20] | Lau W W Y;Guiver M D;Matsuura T .Phase separation in carboxylated polysulfone/solvent/water systems[J].Journal of Applied Polymer Science,1991,42(21):3215-3221. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%