采用热致相分离方法制备了膜孔径分布为0.02～0.1μm的聚丙烯平板疏水微孔膜.用正交实验设计方法对聚丙烯平板膜的制备方法进行优化设计.在正交实验设计条件下,以纯水和浓度为0.5 mol/L的Nacl水溶液真空膜蒸馏实验特性,确定了聚丙烯平板疏水微孔膜优化制备条件.在研究范围内,此优化制备条件为:稀释剂为豆油、iPP(质量分数)为27%、等规聚丙烯(iPP)熔融指数(MI)为16.08 g/10 min、淬冷温度为20℃、成核剂己二酸含量(质量分数)为0.5%、萃取剂为正己烷、铸膜液温度为190℃、刮板温度为210℃.
Narrow pore size distribution hydrophobit microporous membranes show a good performancein mem-brane distillation(MD).The 0.02 ～ 0.1 μm pore size distribution isotactic polypropylene (iPP) hydrophobic mi-croporous membranes were developed via thermally induced phase separation (TIPS) for MD in this study.Or-thogonal test design was adopted to obtain the optimal conditions for preparing iPP flat sheet hydrophobic micro-porous membranes.The VMD performance of pure water and 0.5 mol/L NaCl aqueous solution was studied at the conditions of orthogonal test design.The optimal conditions of iPP membranes preparation for MD under ex-periment conditions was: the diluent was soybean oil, the concentration of iPP in casting solutions was 27%, melt-index (MI) of iPP was 16.08 g/10 min, the quench temperature of water bath was 20 ℃, the nucleating agent was adipie acid and the concentration was 0.5 %, the extractant was hexane, the temperature of casting solutions was 190 ℃ and the temperature of steel plate was 210 ℃.
参考文献
| [1] | Lawson K W;Lloyd D R .Membrane distillation[J].Journal of Membrane Science,1997,124:1-25. |
| [2] | J. Phattaranawik;R. Jiraratananon;A.G. Fane .Effect of pore size distribution and air flux on mass transport in direct contact membrane distillation[J].Journal of Membrane Science,2003(1/2):75-85. |
| [3] | prasad R;Sirkar K K .Solvent extraction with immobilized interfaces in a microporous hydrophobic membrane[J].Separation Science and Technology,1987,22:619-640. |
| [4] | Lu HG;Zheng YF;Cheng MD .Wetting mechanism in mass transfer process of hydrophobic membrane gas absorption[J].Journal of Membrane Science,2008(1/2):180-190. |
| [5] | Castro A J .Methods for making microporousproducts[P].US Pat:4247498,1981-01-27. |
| [6] | Mulder M.Basic Principles of membrane technology[M].Dordrecht:kluwer Academic Publishers,1996:85. |
| [7] | Lloyd D R .Microporous membrane formation via thermally induced phase separation.Ⅰ.Solid-liquid phase separation[J].Journal of Membrane Science,1990,52:239-261. |
| [8] | Mcguire K;Lloyd D R;Lim G B A .Microporous membrane formation via thermally-induced phase separation.Ⅶ.Effect of diluent,cooling rate and nucleating agent addition on morphoiogy[J].Journal of Membrane Science,1993,79:27-34. |
| [9] | Kim S S;Lloyd D R .Microporous membrane formation via thermally-induced phase separation,Ⅲ.Effect of thermodynamic interactions on the structure of isotactic polypropylene membranes[J].Journal of Membrane Science,1991,64:13-29. |
| [10] | Alwattari A A;Lloyd D R .Microporous membrane formation via thermally-induced phase separation.Ⅵ.Effect of diluent morphology and relative crystallization kinetics on polypropylene membrane structure[J].Journal of Membrane Science,1991,64:55-68. |
| [11] | Lim G B A;Kim S S;Ye Q .Micropouous membrane formation via thermally-induced phase separation.Ⅳ.Effect of isotactic polypropylene crystallization kinetics on membrane structure[J].Journal of Membrane Science,1991,64:31-40. |
| [12] | 唐娜,刘家祺,马敬环,王洪军.热致相分离聚丙烯平板微孔膜的制备[J].膜科学与技术,2005(02):38-41. |
| [13] | 唐娜,马敬环,王嘉宁,王海涛,鞠兴文,靳皓琛.热致相分离制膜条件对聚丙烯平板微孔膜结构的影响[J].膜科学与技术,2007(04):21-25. |
| [14] | Tang N;Wang X K;Sha Z L.A technology for preparing narrow pore size distribution membrane[A].Praha:Czech Republic,2006 |
| [15] | 姬振豫.正交设计的方法与理论[M].香港:世界科技出版社,2000 |
| [16] | 马希文.正交设计的数学理论[M].北京:人民教育出版社,1981 |
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