Preparation and Characterisation of Cellulose-based Hydrogel Derived from Printed Waste Paper
Hydrogels were prepared from regenerated cellulose dissolved in NaOH/urea solution by using epichlorohydrin (ECH) as a cross-linker, by two methods, which were freezing and heating. The structure and properties of hydrogel was characterised using SEM and water absorption testing. After NaOH and HCl...
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Universiti Malaysia Sarawak, (UNIMAS)
2014
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my.unimas.ir.344332021-09-06T13:02:15Z http://ir.unimas.my/id/eprint/34433/ Preparation and Characterisation of Cellulose-based Hydrogel Derived from Printed Waste Paper Wong, Ru Sheong QD Chemistry S Agriculture (General) Hydrogels were prepared from regenerated cellulose dissolved in NaOH/urea solution by using epichlorohydrin (ECH) as a cross-linker, by two methods, which were freezing and heating. The structure and properties of hydrogel was characterised using SEM and water absorption testing. After NaOH and HCl pre-treatment, treated white printing waste paper was dissolved in NaOH/ Thiourea/Urea solution and regenerated using ethanol. Hydrogels prepared by heating method had better swelling ratio and reswelling kinetics than hydrogel prepared by freezing method. With the increase in cellulose concentration and ECH cross-linker, the swelling ratio of the hydrogels decreased, while the reswelling kinetics increased. Most of the hydrogels showed macroporous structure in SEM images. Heating hydrogels were more transparent compared to freezing hydrogels. Hence, structure and properties of hydrogels could be changed by varying the cellulose concentrations and ECH concentrations. Universiti Malaysia Sarawak, (UNIMAS) 2014 Final Year Project Report NonPeerReviewed text en http://ir.unimas.my/id/eprint/34433/1/Ru%20Sheong%28fulltext%29.pdf Wong, Ru Sheong (2014) Preparation and Characterisation of Cellulose-based Hydrogel Derived from Printed Waste Paper. [Final Year Project Report] (Unpublished) |
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QD Chemistry S Agriculture (General) Wong, Ru Sheong Preparation and Characterisation of Cellulose-based Hydrogel Derived from Printed Waste Paper |
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Hydrogels were prepared from regenerated cellulose dissolved in NaOH/urea solution by using epichlorohydrin (ECH) as a cross-linker, by two methods, which were freezing and heating. The
structure and properties of hydrogel was characterised using SEM and water absorption testing. After NaOH and HCl pre-treatment, treated white printing waste paper was dissolved in
NaOH/ Thiourea/Urea solution and regenerated using ethanol. Hydrogels prepared by heating method had better swelling ratio and reswelling kinetics than hydrogel prepared by freezing
method. With the increase in cellulose concentration and ECH cross-linker, the swelling ratio of the hydrogels decreased, while the reswelling kinetics increased. Most of the hydrogels showed macroporous structure in SEM images. Heating hydrogels were more transparent compared to freezing hydrogels. Hence, structure and properties of hydrogels could be changed by varying the cellulose concentrations and ECH concentrations. |
format |
Final Year Project Report |
author |
Wong, Ru Sheong |
author_facet |
Wong, Ru Sheong |
author_sort |
Wong, Ru Sheong |
title |
Preparation and Characterisation of Cellulose-based Hydrogel
Derived from Printed Waste Paper |
title_short |
Preparation and Characterisation of Cellulose-based Hydrogel
Derived from Printed Waste Paper |
title_full |
Preparation and Characterisation of Cellulose-based Hydrogel
Derived from Printed Waste Paper |
title_fullStr |
Preparation and Characterisation of Cellulose-based Hydrogel
Derived from Printed Waste Paper |
title_full_unstemmed |
Preparation and Characterisation of Cellulose-based Hydrogel
Derived from Printed Waste Paper |
title_sort |
preparation and characterisation of cellulose-based hydrogel
derived from printed waste paper |
publisher |
Universiti Malaysia Sarawak, (UNIMAS) |
publishDate |
2014 |
url |
http://ir.unimas.my/id/eprint/34433/1/Ru%20Sheong%28fulltext%29.pdf http://ir.unimas.my/id/eprint/34433/ |
_version_ |
1710679799833296896 |
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13.160551 |