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Effect of hygroscopic materials on water vapor permeation and dehumidification performance of poly(vinyl alcohol) membranes

dc.contributor.authorBui, T. D.
dc.contributor.authorWong, Y.
dc.contributor.authorThu, K.
dc.contributor.authorOh, S. J.
dc.contributor.authorKum Ja, M.
dc.contributor.authorNg, Kim Choon
dc.contributor.authorRaisul, I.
dc.contributor.authorChua, K.J.
dc.date.accessioned2017-01-29T13:51:40Z
dc.date.available2017-01-29T13:51:40Z
dc.date.issued2017-01-16
dc.identifier.citationBui TD, Wong Y, Thu K, Oh SJ, Kum Ja M, et al. (2017) Effect of hygroscopic materials on water vapor permeation and dehumidification performance of poly(vinyl alcohol) membranes. Journal of Applied Polymer Science 134. Available: http://dx.doi.org/10.1002/app.44765.
dc.identifier.issn0021-8995
dc.identifier.doi10.1002/app.44765
dc.identifier.urihttp://hdl.handle.net/10754/622804
dc.description.abstractIn this study, two hygroscopic materials, inorganic lithium chloride (LiCl) and organic triethylene glycol (TEG) were separately added to poly(vinyl alcohol) (PVA) to form blend membranes for air dehumidification. Water vapor permeation, dehumidification performance and long-term durability of the membranes were studied systematically. Membrane hydrophilicity and water vapor sorbability increased significantly with higher the hygroscopic material contents. Water vapor permeance of the membranes increased with both added hygroscopic material and absorbed water. Water permeation energy varied from positive to negative with higher hygroscopic content. This observation is attributed to a lower diffusion energy and a relatively constant sorption energy when hygroscopic content increases. Comparatively, PVA/TEG has less corrosive problems and is more environmentally friendly than PVA/LiCl. A membrane with PVA/TEG is observed to be highly durable and is suitable for dehumidification applications.
dc.description.sponsorshipThe authors gratefully acknowledge the generous funding from (1) the National Research Foundation (NRF) Singapore under the Competitive Research Programme (CRP) Funding Scheme (R-265–000-466–281). We would also like to thank Weijie Seow for his invaluable contributions to this study.
dc.publisherWiley
dc.relation.urlhttp://onlinelibrary.wiley.com/doi/10.1002/app.44765/full
dc.subjectAir dehumidification
dc.subjectHydrolic polymer membrane
dc.subjectSolution diffusion mechanism
dc.subjectVacuum membrane dehumidification
dc.subjectWater permeation
dc.titleEffect of hygroscopic materials on water vapor permeation and dehumidification performance of poly(vinyl alcohol) membranes
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.identifier.journalJournal of Applied Polymer Science
dc.contributor.institutionDepartment of Mechanical Engineering; National University of Singapore; 9 Engineering Drive 1 Singapore 117576 Singapore
dc.contributor.institutionKyushu University Program for Leading Graduate School, Green Asia Education Center Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga-koen 6-1, Kasuga-shi; Fukuoka 816-8580 Japan
dc.contributor.institutionEngineering Science Programme, National University of Singapore, 5 Engineering Drive 2, Block E2-05-08; Singapore 117579 Singapore
kaust.personNg, Kim Choon
dc.date.published-online2017-01-16
dc.date.published-print2017-05-05


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