醋酸纤维素膜及其混合膜渗透气化性能的研究——稀溶液粘度斜率系数的依赖性

Studies on Pervaporation Behavior of CA and Its Blend Membranes——Dependence of Permeation Flux on Viscosity Slope Coefficient

研究了醋酸纤维素 (CA)、乙烯 -醋酸乙烯共聚物 (EVA)、聚乙烯醇缩丁醛 (PVB)和聚醋酸乙烯酯(PVAc) 4种高聚物在不同溶剂中的稀溶液粘性行为 .同时 ,从各相应的溶剂中制备了 CA均一膜 ,CA-PVB和 CA-PVAc共混膜以及 CA-EVA复合膜 ,并测定了各种膜对甲醇 (Me OH)、甲基叔丁基醚 (MTBE)混合物的渗透气化性能 .结果表明 ,各种膜的渗透通量 (J)与其稀溶液粘度斜率系数 (b)成反比 ,即呈现随

Viscosity behavior of cellulose acetate(CA) and its blends in different solvents has been studied. The pervaporation behavior of their membranes from the corresponding solvents has been measured for separating methanol/methyl \%ter\%\|butyl ether(MeOH/MTBE) mixture. It was found that the permeation flux (\%J\%) of the membranes is reciprocal to the viscosity slope coefficient (\%b\%) in its dilute solutions.