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Constructing robust and highly-selective hydrogel membranes by bioadhesion-inspired method for CO2 separation
Wu, YZ; Zhou, TT; Wu, H; Fu, WX; Wang, XR; Wang, SF; Yang, LX; Wu, XY; Ren, YX; Jiang, ZY; Wang, B; Wang BY(王宝义)
2018
Source PublicationJOURNAL OF MEMBRANE SCIENCE
ISSN0376-7388
EISSN1873-3123
Volume563Pages:229-237
SubtypeArticle
AbstractWater-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.
KeywordPolydopamine nanoaggregates Poly (vinyl alcohol) Physical cross-linking Carbon dioxide separation
DOI10.1016/j.memsci.2018.05.075
WOS KeywordMIXED-MATRIX MEMBRANES ; FACILITATED TRANSPORT MEMBRANES ; GAS SEPARATION ; CO2/CH4 SEPARATION ; HIGH-PERFORMANCE ; MECHANICAL-PROPERTIES ; CARBON NANOTUBE ; CAPTURE ; FABRICATION ; NANOCOMPOSITE
Indexed BySCI ; EI
Language英语
WOS Research AreaEngineering ; Polymer Science
WOS SubjectEngineering, Chemical ; Polymer Science
WOS IDWOS:000441897200025
EI Accession Number20182505343285
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/286237
Collection多学科研究中心
加速器中心
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Wu, YZ,Zhou, TT,Wu, H,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 Wu, YZ.,Zhou, TT.,Wu, H.,Fu, WX.,Wang, XR.,...&王宝义.(2018).Constructing robust and highly-selective hydrogel membranes by bioadhesion-inspired method for CO2 separation.JOURNAL OF MEMBRANE SCIENCE,563,229-237.
MLA Wu, YZ,et al."Constructing robust and highly-selective hydrogel membranes by bioadhesion-inspired method for CO2 separation".JOURNAL OF MEMBRANE SCIENCE 563(2018):229-237.
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