摘要
以壳聚糖(CS)为涂层材料,聚砜(PSf)为基膜材料,运用浸渍涂覆的方式制备了壳聚糖/聚砜复合中空纤维膜,考察了壳聚糖质量分数、涂覆时间以及操作温度和压力对CO2、N2的渗透分离性能的影响。结果显示,在聚砜基膜上涂覆壳聚糖材料后,可有效提高CO2/N2分离系数;CO2、N2的渗透速率符合Arrhenius关系式;CO2在复合中空纤维膜中的渗透由溶解-扩散和促进传递两方面主导,而N2的渗透符合溶解-扩散模型。
A hollow fiber composite membrane is prepared by coating the chitosan as separating layer on a porous polysulfone（PSf） substrate.The influences of the concentration of coating solution,coating time,operating temperature and pressure on the permselectivity of the hollow fiber composite membranes are investigated.The results show that when the chitosan material is coated on the PSf hollow fiber membrane,the separation factor of CO2 and N2 is effectively improved.Moreover,it is found that the permeability of CO2 and N2 increases with the increase of operating temperature,which fits Arrhenius relation.The transport of N2 through CS/PSf composite membrane follows solution-diffusion mechanism,while for CO2,its permeation performance is suggested to be effected by two aspects—solution-diffusion and facilitated transport.
出处
《现代化工》
CAS
CSCD
北大核心
2013年第6期50-53,共4页
Modern Chemical Industry
基金
国家自然科学基金项目(21107044)
江苏省自然科学基金项目(BK2011017)
江苏省环保厅环保科研课题(2012020)
关键词
复合膜中空纤维膜
二氧化碳
膜分离
促进传递
hollow fiber composite membrane
carbon dioxide
membrane separation
facilitated transport
