Polyacrylamide hydrogel grafted onto polyethylene terephthalate textile via ultraviolet light-emitting diode photografting for oil/water separation

This study was invented to provide a cheaper alternative filter material for oil/water separation application. Polyethylene terephthalate (PET) textiles with diameter of 4.5 cm were chemically grafted with a thin layer of polyacrylamide (PAAm) hydrogel via UV LED photopolymerisation system. From the...

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Main Author:	Naemuddin, Nurul Hazlina
Format:	Thesis
Language:	English
Published:	2017
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/77842/1/NurulHazlinaNaemuddinMFChE20171.pdf
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spelling	my-utm-ep.778422018-07-04T11:46:12Z Polyacrylamide hydrogel grafted onto polyethylene terephthalate textile via ultraviolet light-emitting diode photografting for oil/water separation 2017-08 Naemuddin, Nurul Hazlina TP Chemical technology This study was invented to provide a cheaper alternative filter material for oil/water separation application. Polyethylene terephthalate (PET) textiles with diameter of 4.5 cm were chemically grafted with a thin layer of polyacrylamide (PAAm) hydrogel via UV LED photopolymerisation system. From the grammages that were tested, 85 gsm PET was the most favourable to be used as a matrix. Based on the weight loss data the alkali treatment was optimised under the following condition i.e. 2 hours of treatment with 10 wt % of NaOH at 60 ºC. For the grafting process, the effects of UV curing time (5-30 minutes), positioning of filter paper as a spacer (M1 representing the filter paper at the bottom side only and M2 representing the filter papers at both top and bottom sides) as well as technique of grafting (immersion and dipping) were also taken into the account. The obtained samples were characterised using the basic characteristics such as the degree of grafting (DG) and Fourier transformed infrared spectroscopy (FTIR). The DG values for immersed samples were significantly higher (190 % for M1 and 160 % for M2) than dipped samples (90 % for M1 and 60 % for M2). The obtained samples were also characterised in terms of surface morphology by field emission scanning electron microscopy (FESEM), oil fouling, pure water permeability and oil/water permeability test. The results indicated that, the oil/water separation performance of the hydrogel-grafted filter materials (PAAm-g-HPET) were strongly influenced by the DG of grafted PAAm hydrogel. However, the immersion grafting technique was found not suitable to be used for commercialisation purposes because of the low water permeability due to hydrogel grafting inside pores as evidenced by FESEM images. The dipping grafting method with the positioning of M2 was selected to be the best method to deal with filtration in oil/water separation. Different UV curing time influenced the oil fouling behaviour of filter samples. Data concluded that 20 minutes of curing was the optimum time for hydrogel grafting. Wettability data indicated that the filter materials after undergoing alkali treatment as well as after being grafted with PAAm hydrogel changed from hydrophobic to hydrophilic. To some extent, this innovation has shown in the near future as promising device for oil/water separation. 2017-08 Thesis http://eprints.utm.my/id/eprint/77842/ http://eprints.utm.my/id/eprint/77842/1/NurulHazlinaNaemuddinMFChE20171.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:105138 masters Universiti Teknologi Malaysia, Faculty of Chemical and Energy Engineering Faculty of Chemical and Energy Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Naemuddin, Nurul Hazlina Polyacrylamide hydrogel grafted onto polyethylene terephthalate textile via ultraviolet light-emitting diode photografting for oil/water separation
description	This study was invented to provide a cheaper alternative filter material for oil/water separation application. Polyethylene terephthalate (PET) textiles with diameter of 4.5 cm were chemically grafted with a thin layer of polyacrylamide (PAAm) hydrogel via UV LED photopolymerisation system. From the grammages that were tested, 85 gsm PET was the most favourable to be used as a matrix. Based on the weight loss data the alkali treatment was optimised under the following condition i.e. 2 hours of treatment with 10 wt % of NaOH at 60 ºC. For the grafting process, the effects of UV curing time (5-30 minutes), positioning of filter paper as a spacer (M1 representing the filter paper at the bottom side only and M2 representing the filter papers at both top and bottom sides) as well as technique of grafting (immersion and dipping) were also taken into the account. The obtained samples were characterised using the basic characteristics such as the degree of grafting (DG) and Fourier transformed infrared spectroscopy (FTIR). The DG values for immersed samples were significantly higher (190 % for M1 and 160 % for M2) than dipped samples (90 % for M1 and 60 % for M2). The obtained samples were also characterised in terms of surface morphology by field emission scanning electron microscopy (FESEM), oil fouling, pure water permeability and oil/water permeability test. The results indicated that, the oil/water separation performance of the hydrogel-grafted filter materials (PAAm-g-HPET) were strongly influenced by the DG of grafted PAAm hydrogel. However, the immersion grafting technique was found not suitable to be used for commercialisation purposes because of the low water permeability due to hydrogel grafting inside pores as evidenced by FESEM images. The dipping grafting method with the positioning of M2 was selected to be the best method to deal with filtration in oil/water separation. Different UV curing time influenced the oil fouling behaviour of filter samples. Data concluded that 20 minutes of curing was the optimum time for hydrogel grafting. Wettability data indicated that the filter materials after undergoing alkali treatment as well as after being grafted with PAAm hydrogel changed from hydrophobic to hydrophilic. To some extent, this innovation has shown in the near future as promising device for oil/water separation.
format	Thesis
qualification_level	Master's degree
author	Naemuddin, Nurul Hazlina
author_facet	Naemuddin, Nurul Hazlina
author_sort	Naemuddin, Nurul Hazlina
title	Polyacrylamide hydrogel grafted onto polyethylene terephthalate textile via ultraviolet light-emitting diode photografting for oil/water separation
title_short	Polyacrylamide hydrogel grafted onto polyethylene terephthalate textile via ultraviolet light-emitting diode photografting for oil/water separation
title_full	Polyacrylamide hydrogel grafted onto polyethylene terephthalate textile via ultraviolet light-emitting diode photografting for oil/water separation
title_fullStr	Polyacrylamide hydrogel grafted onto polyethylene terephthalate textile via ultraviolet light-emitting diode photografting for oil/water separation
title_full_unstemmed	Polyacrylamide hydrogel grafted onto polyethylene terephthalate textile via ultraviolet light-emitting diode photografting for oil/water separation
title_sort	polyacrylamide hydrogel grafted onto polyethylene terephthalate textile via ultraviolet light-emitting diode photografting for oil/water separation
granting_institution	Universiti Teknologi Malaysia, Faculty of Chemical and Energy Engineering
granting_department	Faculty of Chemical and Energy Engineering
publishDate	2017
url	http://eprints.utm.my/id/eprint/77842/1/NurulHazlinaNaemuddinMFChE20171.pdf
_version_	1747817844384464896

Polyacrylamide hydrogel grafted onto polyethylene terephthalate textile via ultraviolet light-emitting diode photografting for oil/water separation

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