Development of graphene oxide incorporated polysulfone/pebax thin-film composite membranes for isopropanol dehydration

Polymeric membranes separation among the new and reliable separation and purification techniques in term of energy consumption, ease of process, and high selectivity due to polymer properties which can be tailored to specific needs. Recent works on thin film nanocomposite (TFNC) showed that there is...

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Main Author:	Mohamad Syafiq, Abdul Wahab
Format:	Thesis
Language:	English
Published:	2022
Subjects:	TA Engineering (General) Civil engineering (General) TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/35713/1/Development%20of%20graphene%20oxide%20incorporated%20polysulfone%20pebax%20thin-film%20composite%20membranes.ir.pdf
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spelling	my-ump-ir.357132023-11-01T08:06:38Z Development of graphene oxide incorporated polysulfone/pebax thin-film composite membranes for isopropanol dehydration 2022-01 Mohamad Syafiq, Abdul Wahab TA Engineering (General). Civil engineering (General) TP Chemical technology Polymeric membranes separation among the new and reliable separation and purification techniques in term of energy consumption, ease of process, and high selectivity due to polymer properties which can be tailored to specific needs. Recent works on thin film nanocomposite (TFNC) showed that there is still a gap on factors or parameters involved in TFNC synthesis, which the same old weakness of membrane swelling, flux loss and selectivity deficit seem left to be discovered. In this work, graphene oxide (GO) was embedded to both selective hydrophilic layer and porous Polysulfone (PSF) hydrophobic substrate creating a mutual bridge between the two surfaces. Pristine 1-3 µm microporous PSF prepared via dry/wet phase inversion techniques with contact angle of 74.12° has been further studied with GO embedded Pebax dense selective layer. This dual nature thin film nano composite TFNC membranes managed to reduce the water contact angle down to 37.18°. As for the IPA dehydration study, the total flux up to 1.19 kgm–2h–1 and 0 wt% IPA detected in permeate was achieved with 20 wt% water feed at 30 °C. A two-level full factorial design (FFD) was used to analyze several factors involved in PSF–GO–Pebax TFNC membranes development. Permeate flux was chosen as a single response for four possible factors: Pebax selective layer concentration, amount of GO loads to Pebax selective layer, Pebax–GO selective layer thickness, and amount of GO load to PSF substrate. R2 obtained from the analysis of variance (ANOVA) is 0.9937 with Pebax concentration as the highest contributing factor. Pebax concentration–amount of GO load to PSF substrate is the only interaction contributing to the highest flux. A regression analysis concluded the study with model development and an optimized condition for the membrane design. There are two operating conditions for the pervaporation (PV) studied within this system – the amount of water contents in binary feed mixture and operating temperature. The highest possible flux obtained from this study is at 12 wt% –14 wt% of water in IPA and 61 ℃ – 65 ℃ operating temperature with permeate of 1.514 kgm–2h–1 – 1.562 kgm–2h–1. A permeate flux model for this system also been generated and validated with error margin less than 1 % proving the genuine of the developed model and the ability of data prediction. 2022-01 Thesis http://umpir.ump.edu.my/id/eprint/35713/ http://umpir.ump.edu.my/id/eprint/35713/1/Development%20of%20graphene%20oxide%20incorporated%20polysulfone%20pebax%20thin-film%20composite%20membranes.ir.pdf pdf en public phd doctoral Universiti Malaysia Pahang College of Engineering Sunarti, Abd Rahman
institution	Universiti Malaysia Pahang Al-Sultan Abdullah
collection	UMPSA Institutional Repository
language	English
advisor	Sunarti, Abd Rahman
topic	TA Engineering (General) Civil engineering (General) TP Chemical technology
spellingShingle	TA Engineering (General) Civil engineering (General) TP Chemical technology Mohamad Syafiq, Abdul Wahab Development of graphene oxide incorporated polysulfone/pebax thin-film composite membranes for isopropanol dehydration
description	Polymeric membranes separation among the new and reliable separation and purification techniques in term of energy consumption, ease of process, and high selectivity due to polymer properties which can be tailored to specific needs. Recent works on thin film nanocomposite (TFNC) showed that there is still a gap on factors or parameters involved in TFNC synthesis, which the same old weakness of membrane swelling, flux loss and selectivity deficit seem left to be discovered. In this work, graphene oxide (GO) was embedded to both selective hydrophilic layer and porous Polysulfone (PSF) hydrophobic substrate creating a mutual bridge between the two surfaces. Pristine 1-3 µm microporous PSF prepared via dry/wet phase inversion techniques with contact angle of 74.12° has been further studied with GO embedded Pebax dense selective layer. This dual nature thin film nano composite TFNC membranes managed to reduce the water contact angle down to 37.18°. As for the IPA dehydration study, the total flux up to 1.19 kgm–2h–1 and 0 wt% IPA detected in permeate was achieved with 20 wt% water feed at 30 °C. A two-level full factorial design (FFD) was used to analyze several factors involved in PSF–GO–Pebax TFNC membranes development. Permeate flux was chosen as a single response for four possible factors: Pebax selective layer concentration, amount of GO loads to Pebax selective layer, Pebax–GO selective layer thickness, and amount of GO load to PSF substrate. R2 obtained from the analysis of variance (ANOVA) is 0.9937 with Pebax concentration as the highest contributing factor. Pebax concentration–amount of GO load to PSF substrate is the only interaction contributing to the highest flux. A regression analysis concluded the study with model development and an optimized condition for the membrane design. There are two operating conditions for the pervaporation (PV) studied within this system – the amount of water contents in binary feed mixture and operating temperature. The highest possible flux obtained from this study is at 12 wt% –14 wt% of water in IPA and 61 ℃ – 65 ℃ operating temperature with permeate of 1.514 kgm–2h–1 – 1.562 kgm–2h–1. A permeate flux model for this system also been generated and validated with error margin less than 1 % proving the genuine of the developed model and the ability of data prediction.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Mohamad Syafiq, Abdul Wahab
author_facet	Mohamad Syafiq, Abdul Wahab
author_sort	Mohamad Syafiq, Abdul Wahab
title	Development of graphene oxide incorporated polysulfone/pebax thin-film composite membranes for isopropanol dehydration
title_short	Development of graphene oxide incorporated polysulfone/pebax thin-film composite membranes for isopropanol dehydration
title_full	Development of graphene oxide incorporated polysulfone/pebax thin-film composite membranes for isopropanol dehydration
title_fullStr	Development of graphene oxide incorporated polysulfone/pebax thin-film composite membranes for isopropanol dehydration
title_full_unstemmed	Development of graphene oxide incorporated polysulfone/pebax thin-film composite membranes for isopropanol dehydration
title_sort	development of graphene oxide incorporated polysulfone/pebax thin-film composite membranes for isopropanol dehydration
granting_institution	Universiti Malaysia Pahang
granting_department	College of Engineering
publishDate	2022
url	http://umpir.ump.edu.my/id/eprint/35713/1/Development%20of%20graphene%20oxide%20incorporated%20polysulfone%20pebax%20thin-film%20composite%20membranes.ir.pdf
_version_	1783732237631488000

Development of graphene oxide incorporated polysulfone/pebax thin-film composite membranes for isopropanol dehydration

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