Constructing robust and highly-selective hydrogel membranes by bioadhesion-inspired method for CO2 separation

doi:10.1016/j.memsci.2018.05.075

	Constructing robust and highly-selective hydrogel membranes by bioadhesion-inspired method for CO2 separation
	Wang BY(王宝义); Wu, YZ; Zhou, TT; Wu, H; Fu, WX; Wang, XR; Wang, SF; Yang, LX; Wu, XY; Ren, YX
刊名	JOURNAL OF MEMBRANE SCIENCE
	2018
卷号	563 页码:229-237
关键词	Polydopamine nanoaggregates Poly (vinyl alcohol) Physical cross-linking Carbon dioxide separation
ISSN号	0376-7388
DOI	10.1016/j.memsci.2018.05.075
文献子类	Article
英文摘要	Water-swollen hydrogel membranes are good candidates for CO2 separations due to the favorable solubility of CO2 in water. However, the excessive amount of water often causes the poor mechanical property and low selectivity. Herein, we propose a bioadhesion-inspired method to construct robust and high-performance CO2 separation membranes via in situ generation of polydopamine (PDA) nanoaggregates within poly (vinyl alcohol) (PVA) matrix. PDA nanoaggregates entangled with PVA chains and formed hydrogen bonding with hydroxyl groups from PVA chains. Physical cross-linking occurred between PVA chains and PDA nanoaggregates. Compared with the PVA membrane, the PVA-PDA hybrid membrane with the dopamine content of 0.5 mol% exhibited a 1.7-fold increase in tensile strength and a 2.2-fold increase in the tensile modulus. The membranes were used for CO2/CH4 separation. The physical cross-linking resulted in a PVA chain rigidification region around PDA nanoaggregates, which hindered the penetration of larger-size gas molecules and thus enhancing the CO2/CH4 selectivity. Moreover, the abundant amine groups from PDA nanoaggregates could facilitate CO2 transport. The optimized hybrid hydrogel membrane exhibited CO2/CH4 selectivity of 43.2, which was 43.85% higher than that of the PVA membrane. The bioadhesion-inspired method opens up new opportunities to exploit the potential application of hydrogel membranes.
电子版国际标准刊号	1873-3123
WOS关键词	MIXED-MATRIX MEMBRANES ; FACILITATED TRANSPORT MEMBRANES ; GAS SEPARATION ; CO2/CH4 SEPARATION ; HIGH-PERFORMANCE ; MECHANICAL-PROPERTIES ; CARBON NANOTUBE ; CAPTURE ; FABRICATION ; NANOCOMPOSITE
WOS研究方向	Engineering ; Polymer Science
语种	英语
WOS记录号	WOS:000441897200025
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286237]
专题	高能物理研究所_多学科研究中心高能物理研究所_加速器中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Wang BY,Wu, YZ,Zhou, TT,et al. Constructing robust and highly-selective hydrogel membranes by bioadhesion-inspired method for CO2 separation[J]. JOURNAL OF MEMBRANE SCIENCE,2018,563:229-237.
APA	王宝义.,Wu, YZ.,Zhou, TT.,Wu, H.,Fu, WX.,...&Wang, B.(2018).Constructing robust and highly-selective hydrogel membranes by bioadhesion-inspired method for CO2 separation.JOURNAL OF MEMBRANE SCIENCE,563,229-237.
MLA	王宝义,et al."Constructing robust and highly-selective hydrogel membranes by bioadhesion-inspired method for CO2 separation".JOURNAL OF MEMBRANE SCIENCE 563(2018):229-237.