添加PVP和涂覆聚合物对PAN基中空纤维炭膜性能的影响

研究了用ＰＡＮ基中空纤维膜为基质制备气体分离用中空纤维炭膜的过程。考察了添加剂ＰＶＰ对炭膜的Ｈ２，Ｎ２气体渗透速率，分离系九和柔韧性的影响。同时，研究了用丙烯腈共聚物对中空纤维炭膜涂覆改性后Ｈ２，Ｎ２气体的渗透速率和分离系数。

INFLUENCE OF PVP ADDITION AND COATING PLOYMER ON PERFORMANCES OF PAN BASED HOLLOW FIBER CARBON MEMBRANE

This paper presents astudy of aprocess for preparing PAN based hollowfibercarbon membrane for gases seperation The influences of PVP addition and coatingpolymeron permeatino rates seperation factor of H 2 and N 2 ,and the flexibility of the carbonmembraneare discussed The results show that the surface holes of the precursor membranebecomedensification when the amount of additive of PVP reached4%(w%),and the flexi bilityof the carbon membrane improves and the curvature radius of the carbon membranereachto25mm Simultaneously,the permeation rates of H 2 and N 2 decreases with reverseproportion to the addition of PVP,but the seperation factor of H 2 and N 2increases AftercoatingAN copolymer on the outer surface of the membrane by adrying method,the sepera tionfactor of H 2 and N 2 reaches to 4 9 The surface and cross sections of the carbon mem braneis studied with SEM