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Electrospun nanofiber induced LDH growth to boost CO2 separation

Authors： LI Ziheng, ZHENG Wenji, DAI Yan, WU Xuemei, RUAN Xuehua, WANG Hanli, YANG Zhendong, HE Gaohong

Units： 1. State Key Laboratory of Fine Chemicals, Dalian University of Technology, Membrane Science and Technology Research and Development Center, Dalian 116024, China; 2. Panjin Institute of industrial Technology, Dalian University of Technology, Panjin 124221, China；3. Shandong Huaxia Shenzhou New Material Co., Ltd., Zibo 256401，China)

KeyWords： electrostatic spinning; induce; HPAN; LDH; CO2 separation membrane; mixed matrix membrane

ClassificationCode：TQ051.893

year,volume(issue):pagination： 2023,43(6):35-43

Abstract：

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 CO2 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 CO2 separation. Continuous low-crystalline LDH along the fiber with abundant CO2-philic groups provides a continuous affinity for the CO2 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 CO2 permeation performance of 132.1 Barrer and a CO2/N2 selectivity of 99.4, which improves the CO2 permeation by 46.8% and CO2/N2 selectivity by 25.8% compared to PEO/HPAN MMM.

Funds：

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）

AuthorIntro：

李子恒（2000-），男，河北邢台人，学士，研究方向为功能纳米材料及气体分离膜

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