聚酰亚胺微孔膜疏水化用于膜蒸馏  

Hydrophobic Modification of Polyimide Microporous Membrane for Membrane Distillation

作　　者：孔瑛[1,2] 杨金荣[1,2] 李阳初[1,2] 吴庸烈[1,2] 徐纪平 

机构地区：[1]石油大学炼制系 [2]中国科学院长春应用化学研究所

出　　处：《功能高分子学报》1997年第2期260-264,共5页Journal of Functional Polymers

摘　　要：采用聚合物表面涂覆改性的方法，将疏水性聚合物硅橡胶涂覆在聚酰亚胺亲水微孔膜上，制得了具有良好膜蒸馏性能的聚酰亚胺疏水微孔复合膜。研究了涂覆工艺条件对所得聚酰亚胺疏水微孔复合膜的膜蒸馏性能的影响。结果表明，控制适当工艺条件可制得具有高膜蒸馏通量的聚酰亚胺微孔复合膜，其透过系数可达２．１７×１０－３ｋｇ／ｍ２·ｈ·Ｐａ。该改性聚酰亚胺疏水微孔复合膜使用３７ｄ后，截留率仍保持在９９．５％以上，具有较长使用寿命。The microporous polyimide membrane was surface-modified by silicone rubber coating. The obtained hydrophobic polyimide microporous composite membrane can be used in membrane distillation process. The effect of coating conditions on the membrane distillation properties of the obtained polyimide microporous composite membrane was investigated. The hydrophobic polyimide microporous composite membrane with the membrane distillation permeability of 2.17 kg/ m 2·h·Pa can be prepared under suitable coating conditions. The rejection of the obtained membranes could maintain a level above 99.5% after the membranes had been used in membrane distillation for 37d. As a result, the hydrophobic polyimide microporous composite membrane with high membrane distillation flux and long service life have been obtained.

关 键 词：膜蒸馏 聚酰亚胺 微孔膜 硅橡胶 

分 类 号：O633.22[理学—高分子化学]