Fabrication of PVDF hollow fiber membranes via integrated phase separation for membrane distillation

Li, Yue and Jin, Cailan and Peng, Yuelian and An, Quanfu and Chen, Zhengping and Zhang, Jiacheng and Ge, Lei and Wang, Shaobin (2019) Fabrication of PVDF hollow fiber membranes via integrated phase separation for membrane distillation. Journal of the Taiwan Institute of Chemical Engineers, 95. pp. 487-494. ISSN 1876-1070

Abstract

In this study, polyvinylidene fluoride (PVDF) hollow fibers with interpenetrating network morphologies were fabricated via complex thermally induced phase separation (c-TIPS) by integration of non-solvent induced phase separation (NIPS) and thermally induced phase separation (TIPS) at 80 °C and then tested in membrane distillation (MD). The effects of solvents, additive and bore fluid on the membrane morphology, pore structure and MD performance were investigated. Direct-contact membrane distillation (DCMD) for desalination was carried out to evaluate membrane permeability and salt rejection. Using a weak solvent like triethylphosphate (TEP) and weak bore fluid like polyethylene glycol (PEG-200) in the c-TIPS favors the formation of an interpenetrating network morphology. In addition, PEG-200 increased the roughness and water contact angle of the inner skin. The hollow fibers fabricated via the c-TIPS at low temperature presented high permeability, mechanical strength and long-term stability. In desalination of formulated seawater, a distillate flux of 61.6 kg/m2h with NaCl rejection of 99.99% was achieved at feed temperature of 71 °C.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 15 Oct 2019 03:46
Last Modified: 20 Nov 2019 05:49
Uncontrolled Keywords: c-TIPS; PVDF hollow fibers; Interpenetrating network; Membrane distillation (MD); Stability; IMMERSION PRECIPITATION; DESALINATION; MORPHOLOGY; PERFORMANCE; HYDROPHOBICITY; BEHAVIOR
Fields of Research : 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030304 Physical Chemistry of Materials
09 Engineering > 0904 Chemical Engineering > 090404 Membrane and Separation Technologies
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
D Environment > 96 Environment > 9611 Physical and Chemical Conditions of Water > 961101 Physical and Chemical Conditions of Water for Urban and Industrial Use
Identification Number or DOI: 10.1016/j.jtice.2018.08.036
URI: http://eprints.usq.edu.au/id/eprint/35755

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