Improving membrane distillation performance: Morphology optimization of hollow fiber membranes with selected non-solvent in dope solution

Yao, M; Ren, J; Akther, N; Woo, YC; Tijing, LD; Kim, SH; Shon, HK

Improving membrane distillation performance: Morphology optimization of hollow fiber membranes with selected non-solvent in dope solution

Yao, M Ren, J

Akther, N

Woo, YC

Tijing, LD

Kim, SH Shon, HK

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Publication Type:: Journal Article
Citation:: Chemosphere, 2019, 230 pp. 117 - 126
Issue Date:: 2019-09-01

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Field	Value	Language
dc.contributor.author	Yao, M	en_US
dc.contributor.author	Ren, J https://orcid.org/0000-0001-7124-2726	en_US
dc.contributor.author	Akther, N https://orcid.org/0000-0001-8706-9542	en_US
dc.contributor.author	Woo, YC https://orcid.org/0000-0003-0847-3067	en_US
dc.contributor.author	Tijing, LD https://orcid.org/0000-0001-9398-6355	en_US
dc.contributor.author	Kim, SH	en_US
dc.contributor.author	Shon, HK https://orcid.org/0000-0002-3777-7169	en_US
dc.date.available	2019-05-06	en_US
dc.date.issued	2019-09-01	en_US
dc.identifier.citation	Chemosphere, 2019, 230 pp. 117 - 126	en_US
dc.identifier.issn	0045-6535	en_US
dc.identifier.uri	http://hdl.handle.net/10453/135257
dc.description.abstract	© 2019 Elsevier Ltd This study aimed at improving membrane distillation (MD) performance by mixing various non-solvents (NSs) in polymer dope solutions. The effect of each NS on the inner structure and surface morphology of hollow fiber (HF) membrane was investigated. Membrane morphology is manipulated by controlling liquid-liquid (L-L) and solid-liquid (S-L) demixing time, which is a function of the viscosity and water affinity of dope solutions. Consequently, the addition of NSs altered membrane morphology by affecting the diffusion rate during NS induced phase separation (NIPS) process. The performance results showed that the dope solution composed of 11/71.2/17.8 wt% polyvinylidene fluoride (PVDF)/triethyl phosphate (TEP)/toluene produced the most promising HF membrane for MD. The optimal membrane demonstrated a unique bicontinuous structure with increased porosity and mean pore size. The addition of toluene as NS in dope solutions enhanced crystallization process, which increased the Young's modulus of membrane but slightly decreased its maximum tensile strength at break. The optimal PVDF HF membrane demonstrated a steady flux of 18.9 LMH at 60 °C/20 °C of feed/permeate temperatures and a salt rejection of 99.99% when tested for 72 h. The results suggest that incorporation of toluene as a NS into PVDF dope solutions can increase permeation performance in MD by enhancing the morphology of HF membranes.	en_US
dc.relation	http://purl.org/au-research/grants/arc/FT140101208
dc.relation.ispartof	Chemosphere	en_US
dc.relation.isbasedon	10.1016/j.chemosphere.2019.05.049	en_US
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject.classification	Meteorology & Atmospheric Sciences	en_US
dc.subject.classification	Environmental Sciences	en_US
dc.subject.mesh	Sodium Chloride	en_US
dc.subject.mesh	Water	en_US
dc.subject.mesh	Polyvinyls	en_US
dc.subject.mesh	Membranes, Artificial	en_US
dc.subject.mesh	Solvents	en_US
dc.subject.mesh	Temperature	en_US
dc.subject.mesh	Water Purification	en_US
dc.subject.mesh	Diffusion	en_US
dc.subject.mesh	Porosity	en_US
dc.subject.mesh	Distillation	en_US
dc.title	Improving membrane distillation performance: Morphology optimization of hollow fiber membranes with selected non-solvent in dope solution	en_US
dc.type	Journal Article
utslib.citation.volume	230	en_US
utslib.for	0601 Biochemistry and Cell Biology	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
pubs.organisational-group	/University of Technology Sydney/Students
utslib.copyright.status	open_access	*
utslib.copyright.embargo	2021-09-02T00:00:00+1000
pubs.publication-status	Published	en_US
pubs.volume	230	en_US

Abstract:

© 2019 Elsevier Ltd This study aimed at improving membrane distillation (MD) performance by mixing various non-solvents (NSs) in polymer dope solutions. The effect of each NS on the inner structure and surface morphology of hollow fiber (HF) membrane was investigated. Membrane morphology is manipulated by controlling liquid-liquid (L-L) and solid-liquid (S-L) demixing time, which is a function of the viscosity and water affinity of dope solutions. Consequently, the addition of NSs altered membrane morphology by affecting the diffusion rate during NS induced phase separation (NIPS) process. The performance results showed that the dope solution composed of 11/71.2/17.8 wt% polyvinylidene fluoride (PVDF)/triethyl phosphate (TEP)/toluene produced the most promising HF membrane for MD. The optimal membrane demonstrated a unique bicontinuous structure with increased porosity and mean pore size. The addition of toluene as NS in dope solutions enhanced crystallization process, which increased the Young's modulus of membrane but slightly decreased its maximum tensile strength at break. The optimal PVDF HF membrane demonstrated a steady flux of 18.9 LMH at 60 °C/20 °C of feed/permeate temperatures and a salt rejection of 99.99% when tested for 72 h. The results suggest that incorporation of toluene as a NS into PVDF dope solutions can increase permeation performance in MD by enhancing the morphology of HF membranes.

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http://hdl.handle.net/10453/135257