Preparation and characterization of polylactic acid modified polyvinylidene fluoride hollow fiber membranes with enhanced water flux and antifouling resistance

Although ultrafiltration (UF) membranes have gained considerable attention in water separation and purification process, most of the materials used for commercial UF membranes fabrication are not able to degrade/decompose easily and tend to cause severe environmental problem when they are discarded....

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Main Author:	Mohamad Aseri, Nur Syuhadha
Format:	Thesis
Language:	English
Published:	2019
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/92019/1/NurSyuhadhaMohamadMSChE2019.pdf
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id	my-utm-ep.92019
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spelling	my-utm-ep.920192021-08-30T04:59:10Z Preparation and characterization of polylactic acid modified polyvinylidene fluoride hollow fiber membranes with enhanced water flux and antifouling resistance 2019 Mohamad Aseri, Nur Syuhadha TP Chemical technology Although ultrafiltration (UF) membranes have gained considerable attention in water separation and purification process, most of the materials used for commercial UF membranes fabrication are not able to degrade/decompose easily and tend to cause severe environmental problem when they are discarded. In view of this, an environmentally friendly hydrophilic polymeric material - polylactic acid (PLA) has been considered in this work, aiming to reduce not only the environmental impacts caused by the existing membranes but also to improve membrane water flux and antifouling resistance. In this study, the effects of PLA quantity and air gap (during spinning process) on the morphology and liquid separation performance of polyvinylidene fluoride (PVDF) hollow fiber membranes were investigated. The membrane properties were characterised using scanning electron microscope, atomic force microscope, Fourier transform infrared spectrometer, tensile tester and contact angle goniometer before filtration experiment was conducted. Results showed that the incorporation of low quantity of PLA (with PLA/PVDF weight ratio of =1.0) could significantly improve the membrane water flux from ~30 to 376.7 L/m2.h.bar without compromising rejection (95–97%). More importantly, the PLA-modified PVDF membranes required a much lower temperature to decompose which minimizes environmental impacts. Owing to the improved surface hydrophilicity (lower water contact angle), the PLA-modified PVDF membranes also exhibited a higher flux recovery rate than that of pure PVDF membrane, revealing the improved antifouling resistance against bovine serum albumin. The findings of this work demonstrated that biodegradable PLA has the potential to modify the characteristics of UF membranes, leading to an enhanced water treatment process. 2019 Thesis http://eprints.utm.my/id/eprint/92019/ http://eprints.utm.my/id/eprint/92019/1/NurSyuhadhaMohamadMSChE2019.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:139226 masters Universiti Teknologi Malaysia, Faculty of Engineering - School of Chemical & Energy Engineering Faculty of Engineering - School of Chemical & Energy Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Mohamad Aseri, Nur Syuhadha Preparation and characterization of polylactic acid modified polyvinylidene fluoride hollow fiber membranes with enhanced water flux and antifouling resistance
description	Although ultrafiltration (UF) membranes have gained considerable attention in water separation and purification process, most of the materials used for commercial UF membranes fabrication are not able to degrade/decompose easily and tend to cause severe environmental problem when they are discarded. In view of this, an environmentally friendly hydrophilic polymeric material - polylactic acid (PLA) has been considered in this work, aiming to reduce not only the environmental impacts caused by the existing membranes but also to improve membrane water flux and antifouling resistance. In this study, the effects of PLA quantity and air gap (during spinning process) on the morphology and liquid separation performance of polyvinylidene fluoride (PVDF) hollow fiber membranes were investigated. The membrane properties were characterised using scanning electron microscope, atomic force microscope, Fourier transform infrared spectrometer, tensile tester and contact angle goniometer before filtration experiment was conducted. Results showed that the incorporation of low quantity of PLA (with PLA/PVDF weight ratio of =1.0) could significantly improve the membrane water flux from ~30 to 376.7 L/m2.h.bar without compromising rejection (95–97%). More importantly, the PLA-modified PVDF membranes required a much lower temperature to decompose which minimizes environmental impacts. Owing to the improved surface hydrophilicity (lower water contact angle), the PLA-modified PVDF membranes also exhibited a higher flux recovery rate than that of pure PVDF membrane, revealing the improved antifouling resistance against bovine serum albumin. The findings of this work demonstrated that biodegradable PLA has the potential to modify the characteristics of UF membranes, leading to an enhanced water treatment process.
format	Thesis
qualification_level	Master's degree
author	Mohamad Aseri, Nur Syuhadha
author_facet	Mohamad Aseri, Nur Syuhadha
author_sort	Mohamad Aseri, Nur Syuhadha
title	Preparation and characterization of polylactic acid modified polyvinylidene fluoride hollow fiber membranes with enhanced water flux and antifouling resistance
title_short	Preparation and characterization of polylactic acid modified polyvinylidene fluoride hollow fiber membranes with enhanced water flux and antifouling resistance
title_full	Preparation and characterization of polylactic acid modified polyvinylidene fluoride hollow fiber membranes with enhanced water flux and antifouling resistance
title_fullStr	Preparation and characterization of polylactic acid modified polyvinylidene fluoride hollow fiber membranes with enhanced water flux and antifouling resistance
title_full_unstemmed	Preparation and characterization of polylactic acid modified polyvinylidene fluoride hollow fiber membranes with enhanced water flux and antifouling resistance
title_sort	preparation and characterization of polylactic acid modified polyvinylidene fluoride hollow fiber membranes with enhanced water flux and antifouling resistance
granting_institution	Universiti Teknologi Malaysia, Faculty of Engineering - School of Chemical & Energy Engineering
granting_department	Faculty of Engineering - School of Chemical & Energy Engineering
publishDate	2019
url	http://eprints.utm.my/id/eprint/92019/1/NurSyuhadhaMohamadMSChE2019.pdf
_version_	1747818555899904000

Preparation and characterization of polylactic acid modified polyvinylidene fluoride hollow fiber membranes with enhanced water flux and antifouling resistance

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