氟涂层对聚合物-钴卟啉膜氧气输送性能及其寿命的影响  

Effect of a Fluoro-coating on Oxygen Transport Performance and Lifetime of a Polymer-cobaltporphyrin Membrane

作　　者：申屠宝卿[1] 翁志学[1] 潘祖仁[1] 西出宏之 

机构地区：[1]浙江大学化工系,杭州310027 [2]早稻田大学应用化学系

出　　处：《高等学校化学学报》2005年第1期162-165,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金 (批准号 :5 0 3 73 0 3 5 )资助

摘　　要：采用在聚合物 -钴卟啉 (Co P)膜表面旋转涂覆氟涂料法 ,制备了氧 /氮分离膜 .研究表明 ,与未涂层膜相比 ,氟涂层膜中的 Co P与氧表观结合平衡常数、膜的氧渗透系数和氧 /氮选择性没有发生明显变化 .随氟涂层厚度增加 ,氧渗透系数稍有降低 ,但水蒸汽渗透系数显著降低 .由于氟涂层的憎水性 ,使涂层膜的水蒸汽渗透系数显著降低 ,氧载体 Co P与氧结合寿命延长了 4倍 .A membrane having a long lifetime was prepared by spin-coating a perfluororesin on the polymer-cobaltporphyrin membrane, while the coating had no significant effect on the oxygen permeability and oxygen/nitrogen selectivity of the membrane. The oxygen-binding properties of CoP and facilitated oxygen transport of the coated membrane were also studied. It was found that CoP fixed even in the coated membrane had rapid and reversible oxygen-binding properties in response to the partial oxygen pressures and the apparent oxygen-binding equilibrium constants of CoP were not influenced by the coating. Oxygen permeation was selectively facilitated with CoP fixed in the perfluororesin-coated membrane, whereas the water vapor permeability was significantly suppressed in comparison with that of the uncoated membrane. With increasing the coating thickness, the oxygen permeability coefficients slightly decreased, but the water vapor permeability coefficients significantly decreased. The lifetime of the CoP as an oxygen-carrier in the perfluororesin-coated membrane was prolonged, which was attributed to the hydrophobic property of the coating.

关 键 词：膜 卟啉钴 全氟涂层 促进输送 寿命 

分 类 号：O631[理学—高分子化学]