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dc.contributor.authorWu, Yingzhen
dc.contributor.authorZhou, Tiantian
dc.contributor.authorWu, Hong
dc.contributor.authorFu, Weixian
dc.contributor.authorWang, Xinru
dc.contributor.authorWang, Shaofei
dc.contributor.authorYang, Leixin
dc.contributor.authorWu, Xingyu
dc.contributor.authorRen, Yanxiong
dc.contributor.authorJiang, Zhongyi
dc.contributor.authorWang, Baoyi
dc.date.accessioned2018-06-03T08:15:54Z
dc.date.available2018-06-03T08:15:54Z
dc.date.issued2018-06-01
dc.identifier.citationWu Y, Zhou T, Wu H, Fu W, Wang X, et al. (2018) Constructing robust and highly-selective hydrogel membranes by bioadhesion-inspired method for CO 2 separation. Journal of Membrane Science. Available: http://dx.doi.org/10.1016/j.memsci.2018.05.075.
dc.identifier.issn0376-7388
dc.identifier.doi10.1016/j.memsci.2018.05.075
dc.identifier.urihttp://hdl.handle.net/10754/628008
dc.description.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 0.5mol% 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.
dc.description.sponsorshipThe authors gratefully acknowledge the financial support from the National Key R&D Program of China (2017YFB0603400), the National Natural Science Foundation of China (No. 21576189, 21490583 and 21621004), Natural Science Foundation of Tianjin (16JCZDJC36500), the National Science Fund for Distinguished Young Scholars (No. 21125627), Program of Introducing Talents of Discipline to Universities (B06006), State Key Laboratory of Organic-Inorganic Composites (oic-201701004).
dc.publisherElsevier BV
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0376738818303922
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Journal of Membrane Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Membrane Science, [, , (2018-06-01)] DOI: 10.1016/j.memsci.2018.05.075 . © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectPolydopamine nanoaggregates
dc.subjectPoly (vinyl alcohol)
dc.subjectPhysical cross-linking
dc.subjectCarbon dioxide separation
dc.titleConstructing robust and highly-selective hydrogel membranes by bioadhesion-inspired method for CO 2 separation
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.identifier.journalJournal of Membrane Science
dc.eprint.versionPost-print
dc.contributor.institutionCollaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
dc.contributor.institutionKey Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
dc.contributor.institutionTianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin 300072, China
dc.contributor.institutionKey Laboratory of Nuclear Radiation and Nuclear Energy Technology, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
kaust.personWang, Shaofei
refterms.dateFOA2020-05-01T00:00:00Z
dc.date.published-online2018-06-01
dc.date.published-print2018-10


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