摘要
以商业化聚酰亚胺Matrimid5218作为功能层材料,聚砜作为支撑层材料,采用共挤出法制备双层非对称中空纤维气体分离膜.所制备的双层非对称中空纤维膜具有致密无缺陷的超薄皮层,致密皮层厚度约为0.21μm.在25℃,0.5 MPa下,CO2/CH4的选择性系数达51.39,CO2的渗透系数为46.29 GPU,O2/N2的选择性系数达到7.13,O2的渗透速率为6.38 GPU.考察了温度和压力对膜的渗透系数和选择性系数的影响,并考察了物理老化对膜性能的影响.
Dual-layer Matrimid /PSf hollow fiber membranes for gas separation were fabricated via co-extrusion technology. The hollow fiber membranes have an ultrathin dense-selective layer of 0.21 μm. The hollow fiber membranes have a CO2 permeance of 46.29 GPU with a CO2/CH4 selectivity coefficient of 51.39 at 25 ℃ and 0.5 MPa. And the hollow fiber membranes have an O2 permeance rate of 6.38 GPU with an O2/N2 selectivity coefficient of 7.13 at 25 ℃ and 0. 5 MPa. The effects of the test temperature and the feed pressure on the gas separation performance were investigated. Finally, the aging phenomena were investigated.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第10期2074-2078,共5页
Chemical Journal of Chinese Universities
基金
国家“九七三”计划(批准号:2003CB615703)
国家“八六三”计划(批准号:2006AA05Z315)资助