摘要
以湿相转化法制备ＣＯ２／ＣＨ４醋酸纤维素分离膜，无需热处理工序；研究了各种制膜条件，如蒸发时间、聚合物浓度及添加剂含量等，对膜气体分离性能的影响；用扫描电镜观察了膜的形态结构。结果表明，适当提高聚合物浓度和延长蒸发时间可使膜表皮层变致密，获得高的ＣＯ２／ＣＨ４分离选择性和气体透过速率。
Asymmetric cellulose acetate membranes were prepared without heat treating by the wet phase inversion. The effect of the membrane forming factors on separation characteristics of the membrane for CO 2/CH 4 was investigated. Morphologies by scanning electron photomicrographs were observed. It has shown that the asymmetric CA membranes for the seperation of CO 2/CH 4 with good separation factor, higher flux coefficient are obtained by increasing the polymer concentration in the casting solution and prolonging the evaporating time during the membrane forming process.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1997年第4期64-68,共5页
Polymer Materials Science & Engineering
基金
天津市21世纪青年基金
