Exploiting the Interplay between Liquid-Liquid Demixing and Crystallization of the PVDF Membrane for Membrane Distillation
Joint Authors
Jaafar, Juhana
Md Nordin, Nik Abdul Hadi
Bilad, Muhammad Roil
Putra, Zulfan Adi
Wirzal, Mohd Dzul Hakim
Nawi, N. I. M.
Mavukkandy, M. O.
Khan, Asim L.
Source
International Journal of Polymer Science
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-12-05
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Membrane distillation (MD) purifies water by transporting its vapor through a hydrophobic membrane.
An ideal MD membrane poses high water flux and high fouling, scaling, and wetting resistances.
In this study, we develop polyvinylidene fluoride (PVDF) membranes for MD by focusing on reduction of PVDF degree of crystallinity.
We explore the roles of dope solution temperature in dictating the phase separation mechanisms as well as the structure and the performance of semicrystalline PVDF membranes.
DSC spectra show that higher dope solution temperature depresses crystallinity via formation of imperfect crystal.
Such findings were also supported by FTIR and XRD results.
The SEM images reveal formation of spherulite-like morphology in the membrane matrices for membranes prepared from high temperature dope solutions.
A good balance between solid-liquid and liquid-liquid phase separations that offers low degree of crystallinity was found at a dope solution temperature of 60°C (PVDF-60), which showed the MD flux of 18 l/m2 h (vs.
6 l/m2 h for temperature of 25°C, as a benchmark) and nearly complete salt rejection when run at hot and cold temperatures of 65°C and 25°C, respectively.
The PVDF-60 shows a high wetting resistance and stable MD flux of 10.5 l/m2 h over a 50 h test for treating brine solution as the feed (70 g NaCl/l).
American Psychological Association (APA)
Nawi, N. I. M.& Bilad, Muhammad Roil& Md Nordin, Nik Abdul Hadi& Mavukkandy, M. O.& Putra, Zulfan Adi& Wirzal, Mohd Dzul Hakim…[et al.]. 2018. Exploiting the Interplay between Liquid-Liquid Demixing and Crystallization of the PVDF Membrane for Membrane Distillation. International Journal of Polymer Science،Vol. 2018, no. 2018, pp.1-10.
https://search.emarefa.net/detail/BIM-1174885
Modern Language Association (MLA)
Nawi, N. I. M.…[et al.]. Exploiting the Interplay between Liquid-Liquid Demixing and Crystallization of the PVDF Membrane for Membrane Distillation. International Journal of Polymer Science No. 2018 (2018), pp.1-10.
https://search.emarefa.net/detail/BIM-1174885
American Medical Association (AMA)
Nawi, N. I. M.& Bilad, Muhammad Roil& Md Nordin, Nik Abdul Hadi& Mavukkandy, M. O.& Putra, Zulfan Adi& Wirzal, Mohd Dzul Hakim…[et al.]. Exploiting the Interplay between Liquid-Liquid Demixing and Crystallization of the PVDF Membrane for Membrane Distillation. International Journal of Polymer Science. 2018. Vol. 2018, no. 2018, pp.1-10.
https://search.emarefa.net/detail/BIM-1174885
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1174885