摘要
采用“挤出-拉伸-烧结”法制备了聚四氟乙烯（ PTFE ）中空纤维膜,通过FESEM、孔径分析仪和压汞仪 分别对 PTFE 中空纤维膜的形貌、孔径和孔隙率进行表征.通过真空膜再生技术对有机胺吸收剂分子结构（氨基上活泼氢原子数,空间位阻效应,羟基基团数和氨基基团数）对CO2真空膜再生性能的影响进行研究.结果表明：制备的PTFE中空纤维膜具有非对称微孔结构;随着有机胺分子中氨基上活泼氢原子数的增加, CO2真空膜再生性能下降;随着分子空间位阻效应的增强,CO2真空膜再生性能提高;当吸收剂分子中羟基基团数和氨基基团数增加时, CO2真空膜再生性能呈现上升趋势.
In this paper,the polytetrafluoroethylene(PTFE)hollow fiber membrane was prepared through a cold pressing method including pushing,stretching and sintering.The morphology,membrane aperture and membrane porosity of PTFE hollow fiber membrane samples were characterized by FESEM,pore size analyzer and mercury porosimeter.The effects of molecular structures of absorbent(number of activated hydrogen atoms in amine group,number of hydroxyl groups,number of amine groups and the steric hindrance effect)on the CO_2 regeneration performance were investigated by using vacuum regeneration technology of PTFE hollow fiber membrane.Results show that PTFE hollow fiber membrane has asymmetric microporous structure.The CO_2 regeneration performance decreases with an increase of the number of activated hydrogen atoms in amine group.The CO_2 regeneration performance is improved by increasing the number of the hydroxyl groups and amine groups.Furthermore,steric hindrance effect has the positive influence on the increase of CO_2 regeneration performance.When the number of the hydroxyl groups and amine groups increases in absorbent molecules,CO_2 regeneration performance shows a rising trend.
出处
《浙江理工大学学报（自然科学版）》
2016年第5期696-701,共6页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
基金
国家科技支撑计划项目(2013BAC01B01)
浙江省自然科学基金项目(LY15B060010)
浙江省重大科技专项重大社会发展项目(2013C01055)
浙江省高校重中之重学科优秀基金
开放基金项目(2014KF05,2014YXQN03)
关键词
PTFE中空纤维膜
真空膜再生
分子结构
PTFE hollow fiber membrane
vacuum membrane regeneration
molecular structures
