在气体膜分离中,水蒸气的分离过程比其它非凝聚性气体更复杂,因为水分子可以通过氢键和聚合物链节中极性基团发生作用,使聚合物被溶胀、塑化;水分子自身可通过分子间氢键聚集成簇,这些因素导致了水分子在膜中的透过行为不再符合其它气体的透过规律.水蒸气在极性高分子膜中较高的渗透能力会在膜的下游侧产生浓差极化现象,消除浓差极化现象才能使水蒸气透过正常进行.膜材料的选择要权衡亲水性和疏水性,共混和嵌段共聚是解决这一矛盾的有效手段.水蒸气在高分子膜中的较高透过能力使其用于气体膜法脱湿成为可能.现以压缩空气膜法脱湿为例,介绍了影响膜法脱湿效率的主要因素,也介绍了气体膜法脱湿的其它应用领域.
参考文献
| [1] | Schult K A;Paul D R .Water sorption and transport in a series of polysulfones[J].Journal of Polymer Science Part B:Polymer Physics,1996,34:2805-2817. |
| [2] | Stannett V;Haider M;Koros W J et al.Sorption and transport of water vapor in glassy poly(Acrylonitrile)[J].Polymer Engineering & Science,1980,4:300-304. |
| [3] | Schult K A;Paul D R .Water sorption and transport in blends of poly (vinylpyrrolidone) and polysulfone[J].Journal of Polymer Science Part B:Polymer Physics,1997,35:655-674. |
| [4] | Schult K A;Paul D R .Water sorption and transport in blends of polyethyloxazoline and polyet-hersulfone[J].Journal of Polymer Science Part B:Polymer Physics,1997,35:993-1007. |
| [5] | Aitkan C L;Koros L W;Paul D R .Effect of structure ansymmetry on gas transport properties of poly-sulfones[J].Macromolecules,1992,25:3424-3434. |
| [6] | Aguilar Vega M;Paul D R .Gas transport properties of polycarbonates and polysulfones with aromatic substitutions on the bisphenol connector group[J].Journal of Polymer Science Part B:Polymer Physics,1993,B31:1599-1610. |
| [7] | A.J.Kelkar;D.R.Paul .Water vapor transport in a series of polyarylates[J].Journal of Membrane Science,2001(2):199-212. |
| [8] | Barrie J A;Machin D;Nunn A .Transport of water in synthetic cis-1,4-polyisoprenes and natural rubber[J].POLYMER,1975,16:811-814. |
| [9] | Mensitieri G;Del Nobile M A;Sommazzi A et al.Water transport in a polyketone terpolymer[J].Journal of Polymer Science Part B:Polymer Physics,1995,33:1365-1370. |
| [10] | Metz SJ;van de Ven WJC;Potreck J;Mulder MHV;Wessling M .Transport of water vapor and inert gas mixtures through highly selective and highly permeable polymer membranes[J].Journal of Membrane Science,2005(1/2):29-41. |
| [11] | 彭曦,吴庸烈,刘静芝,郑敬河.SPES-C与PI共混材料膜的气体除湿性能[J].高分子材料科学与工程,1998(06):79-81. |
| [12] | 李国民,冯春生,李俊凤,刘静芝,吴庸烈.共混改性聚酰亚胺中空纤维膜的压缩空气除湿性能研究[J].功能高分子学报,2005(02):194-197. |
| [13] | Landro L D;Pegoraro M;Bordogma L .Interactions of polyether-polyurethanes with water vapor and watermethane separation selectivity[J].Journal of Membrane Science,1991,64(03):229-236. |
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