摘要
首次制成顺丁橡胶(PB)与具有二重液晶相转变(近晶相,向列相)的液晶化合物双4-(4’-乙氧基苯甲酰氧基)苯甲酸一缩乙二醇酯(DEBEB)的复合膜并研究了其富氧性能。PB/DEBEB复合膜在液晶含量10%时,室温下具有比基质聚合物PB膜大几倍的氧透过系数(po2)。透过系数与温度的关系曲线呈现“N”型特征。这些现象与液晶的二重相变行为和膜的形态结构有关。
Polymer/liquid crystal composite membranes containing poly(cis-butadiene)(PB)and diethylene glycol bis-4-(4'-ethoxybenzoyloxy) benzoate(DEBEB)with two transitionmesophases were prepared for the first time and their oxygen enrichment properties were investigated.The oxygen permeability of the composite membrane with 10%weight content ofDEBEB liquid crystal exhibited several times greater than that of the PB membrane at roomtemperature.Relationship between permeability coefficients and temperatures was characterized by N-shape curves,that is,the permeability coefficients first increased,followed by decreasing,and then increased again with increasing temperature continuously.We interpretthis result as effect of phase behavior of the liquid crystal and morphology of the compositemembranes on the permeabilities.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第4期659-662,共4页
Chemical Journal of Chinese Universities
基金
国家教育委员会博士学科点基金
关键词
气体分离膜
富氧膜
液晶复合膜
PB
DEBEB
Gas separation membrane,Oxygen enrichment membrane,Polymer/liquid crystal composite membrane