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dc.contributor.authorQua, Marn Soonen_US
dc.contributor.authorZhao, Yanen_US
dc.contributor.authorZhang, Junyouen_US
dc.contributor.authorHernandez, Sebastianen_US
dc.contributor.authorPaing, Aung Theten_US
dc.contributor.authorMottaiyan, Karikalanen_US
dc.contributor.authorZuo, Jianen_US
dc.contributor.authorDhalla, Adilen_US
dc.contributor.authorChung, Tai-Shungen_US
dc.contributor.authorGudipati, Chakravarthyen_US
dc.identifier.citationQua, M. S., Zhao, Y., Zhang, J., Hernandez, S., Paing, A. T., Mottaiyan, K., Zuo, J., Dhalla, A., Chung, T. & Gudipati, C. (2022). Novel sandwich-structured hollow fiber membrane for high-efficiency membrane distillation and scale-up for pilot validation. Membranes, 12(4), 423-.
dc.description.abstractHollow fiber membranes were produced from a commercial polyvinylidene fluoride (PVDF) polymer, Kynar HSV 900, with a unique sandwich structure consisting of two sponge-like layers connected to the outer and inner skin layers while the middle layer comprises macrovoids. The sponge-like layer allows the membrane to have good mechanical strength even at low skin thickness and favors water vapor transportation during vacuum membrane distillation (VMD). The middle layer with macrovoids helps to significantly reduce the trans-membrane resistance during water vapor transportation from the feed side to the permeate side. Together, these novel structural characteristics are expected to render the PVDF hollow fiber membranes more efficient in terms of vapor flux as well as mechanical integrity. Using the chemistry and process conditions adopted from previous work, we were able to scale up the membrane fabrication from a laboratory scale of 1.5 kg to a manufacturing scale of 50 kg with consistent membrane performance. The produced PVDF membrane, with a liquid entry pressure (LEPw) of >3 bar and a pure water flux of >30 L/m2·hr (LMH) under VMD conditions at 70-80 °C, is perfectly suitable for next-generation high-efficiency membranes for desalination and industrial wastewater applications. The technology translation efforts, including membrane and module scale-up as well as the preliminary pilot-scale validation study, are discussed in detail in this paper.en_US
dc.description.sponsorshipEconomic Development Board (EDB)en_US
dc.relationS15-1068-NRF EWI-RCFSen_US
dc.rights© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// 4.0/).en_US
dc.subjectEngineering::Environmental engineering::Water treatmenten_US
dc.titleNovel sandwich-structured hollow fiber membrane for high-efficiency membrane distillation and scale-up for pilot validationen_US
dc.typeJournal Articleen
dc.contributor.organizationNanyang Technological University–NTUitive Pte Ltden_US
dc.contributor.researchNanyang Environment and Water Research Instituteen_US
dc.contributor.researchSeparation Technologies Applied Research and Translation Centreen_US
dc.description.versionPublished versionen_US
dc.subject.keywordsHollow Fiber Membranesen_US
dc.subject.keywordsVacuum Membrane Distillationen_US
dc.description.acknowledgementThis research was funded by the Economic Development Board (Singapore) through grant number S15-1068-NRF EWI-RCFS.en_US
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