Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 499, Issue -, Pages 352-360Publisher
ELSEVIER
DOI: 10.1016/j.memsci.2015.10.030
Keywords
Forward osmosis; Electrospinning; Nanofibers; Coating
Categories
Funding
- U.S. Environmental Protection Agency [R834872]
- Department of Energy
- National Science Foundation (CBET) [1160098, 1067564]
- 3M Nontenured Faculty Award
- DuPont Young Faculty Award
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1067564] Funding Source: National Science Foundation
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Hydrophilic electrospun nanofiber supported thin film composite (TFC) membranes have recently been considered for forward osmosis (FO). Our previous work has shown that the high degree of swelling in hydrophilic nanofibers compromises fiber strength and membrane integrity. To reduce swelling, we propose to modify a non-swelling hydrophobic fiber to make it hydrophilic and fully wettable without negatively impacting the mechanical properties of the material. The method chosen for this work involves the interfacial polymerization of 1,6-hexane diamine and adipoyl chloride to form nylon 6,6 directly onto electrospun PVDF fibers. The result is a dual benefit of hydrophilization and strengthening of nanofibers to improve their wettability. The modified nanofibers exhibited significantly lower swelling propensity than intrinsically hydrophilic nylon 6,6 nanofibers due to the hydrophobic core fiber, and are thus able to retain strength in an aqueous environment. These modified PVDF supports were used in making TFC membranes that exhibited excellent flux performance and one of the lowest structural parameters reported in open literature. (C) 2015 Elsevier B.V. All rights reserved.
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