摘要
先进的功能膜材料是实现高效膜分离的关键,要求兼顾选择性和渗透通量。层状双金属氢氧化物(LDH)表面存在丰富的-OH基团,对CO_(2)具有较高吸附选择性。利用晶种外延生长策略(SES),通过溶剂热合成在电纺纤维载体上诱导生长LDH,并用聚乙二醇二丙烯酸酯(PEGDA)在纤维间隙间原位光聚合得到致密的PEO/HPAN-LDH MMM,用于CO_(2)的高效分离。研究结果表明,沿纤维连续的低结晶LDH具有丰富的亲CO_(2)基团提供连续亲和CO_(2)的传递通路。通过增加LDH生长次数,提高LDH的担载量。性能最佳的PEO/HPAN-LDH-2 MMM的CO_(2)渗透性能为132.1 Barrer,CO_(2)/N_(2)选择性高达99.4,相较于PEO/HPAN MMM,CO_(2)渗透性能提升46.8%,CO_(2)/N2选择性提升25.8%。
Advanced functional membranes are the core for achieving efficient membrane separation,requiring a balance of selectivity and permeability.Layered double hydroxides(LDH)have abundant-OH groups on the surface which exhibit high selectivity for CO_(2)adsorption.Using a crystal species epitaxy growth strategy(SES),LDH was induced to grow on electrospun fiber by solvothermal synthesis,and dense PEO/HPAN-LDH MMM was obtained by in situ photopolymerization of polyethylene glycol diacrylate(PEGDA)between fiber gaps for efficient CO_(2)separation.Continuous low-crystalline LDH along the fiber with abundant CO_(2)-philic groups provides a continuous affinity for the CO_(2)transfer pathway.By increasing the growth times of LDH,the loading capacity of LDH is increased.The best performing PEO/HPAN-LDH-2 MMM has a CO_(2)permeation performance of 132.1 Barrer and a CO_(2)/N_(2) selectivity of 99.4,which improves the CO_(2)permeation by 46.8%and CO_(2)/N2 selectivity by 25.8%compared to PEO/HPAN MMM.
作者
李子恒
郑文姬
代岩
吴雪梅
阮雪华
王汉利
杨振东
贺高红
LI Ziheng;ZHENG Wenji;DAI Yan;WU Xuemei;RUAN Xuehua;WANG Hanli;YANG Zhendong;HE Gaohong(State Key Laboratory of Fine Chemicals,Dalian University of Technology,Membrane Science and Technology Research and Development Center,Dalian 116024,China;Panjin Institute of industrial Technology,Dalian University of Technology,Panjin 124221,China;Shandong Huaxia Shenzhou New Material Co.,Ltd.,Zibo 256401,China)
出处
《膜科学与技术》
CAS
CSCD
北大核心
2023年第6期35-43,共9页
Membrane Science and Technology
基金
国家自然科学基金项目(21978035,22178041,22021005,22141001,21978033)
国家重点研发计划项目(2019YFE0119200)
山东省重点研发计划项目(2022CXGC010303)
辽宁省振兴人才计划项目(XLYC1901005,XLYC2007040)
辽宁省化学添加剂合成与分离重点实验室项目(ZJKF2007,ZJKF2002,ZJKF2016)。
