以湿涂方式,采用浸渍涂层方法,通过溶剂蒸发制得聚醚共聚酰胺PEBA2533平板复合气体分离膜,探讨了在复合膜制备过程中,涂层液溶剂的选择、底膜、涂层浓度、涂层温度以及固化干燥时间等因素对CO2/N2体系渗透分离性能的影响.正丙醇和水的互溶性导致了大量表面缺陷的形成,使得以正丙醇为溶剂制得的复合气体分离膜对CO2/N2体系没有选择性.以正丁醇做溶剂,涂层质量分数大于5%时,形成具有致密分离层的复合气体分离膜,CO2/N2分离系数达到本征分离性能.涂层温度的升高促使复合膜表面缺陷的增加,导致CO2/N2的分离系数减小.
参考文献
[1] | Kuo C;Lindberg C;Phomson D J .Coherence established between atmospheric carbon dioxide and global temperature[J].NATURE,1990,343:709-714. |
[2] | Bondar VI.;Pinnau I.;Freeman BD. .Gas transport properties of poly(ether-b-amide) segmented block copolymers[J].Journal of Polymer Science, Part B. Polymer Physics,2000(15):2051-2062. |
[3] | Bondar V I;Freeman B D;Pinnau I .Gas sorption and characterization of poly(ether-b-amide)segmented block copolymer[J].Journal of Polymer Science Part B:Polymer Physics,1999,37:2463-2475. |
[4] | Jae Hoon Kim;Seong Yong Ha;Young Moo Lee .Gas permeation of poly(amide-6-b-ethylene oxide_ copolymer[J].Journal of Membrane Science,2001(2):179-193. |
[5] | Li Liu;Amit Chakma;Xianshe Feng .A novel method of preparing ultrathin poly(ether block amide) membranes[J].Journal of Membrane Science,2004(1/2):43-52. |
[6] | Li Liu;Amit Chakma;Xianshe Feng .Preparation of hollow fiber poly(ether block amide)/polysulfone composite membranes for separation of carbon dioxide from nitrogen[J].Chemical Engineering Journal,2004(1/2):43-51. |
[7] | Sridhar S;Suryamurali R;Smitha B;Aminabhavi TM .Development of crosslinked poly(ether-block-amide) membrane for CO2/CH4 separation[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,2007(1/3):267-274. |
[8] | Yasuda H;Tsai J T .Pore size of microporous polymer membranes[J].Journal of Applied Polymer Science,1974,18:805-819. |
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%