Preparatioon and characterisation of cellulose-based hydrogel derived from sugarcane bagasse
Hydrogels were produced by di solving regenerated cellulose in NaOH/urea solution by using citric acid (CA) as a cross-linker, by two methods, which were heating and freezing. The surface morphology and properties of hydrogel was characterised using SEM and water absorption testing. After HN03, Na...
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| Main Author: | |
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| Format: | Final Year Project Report / IMRAD |
| Language: | en |
| Published: |
Universiti Malaysia Sarawak, (UNIMAS)
2016
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| Subjects: | |
| Online Access: | http://ir.unimas.my/id/eprint/20579/3/KANCHANA%20-%20full.pdf http://ir.unimas.my/id/eprint/20579/ |
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| Summary: | Hydrogels were produced by di solving regenerated cellulose in NaOH/urea solution by using citric acid
(CA) as a cross-linker, by two methods, which were heating and freezing. The surface morphology and
properties of hydrogel was characterised using SEM and water absorption testing. After HN03, NaOH and
H~2 pre-treatment, treated sugarcane bagasse (SCB) was dissolved in NaOHffhiourealUrea solution and
generated using ethanol. Hydrogels produced by heating method had better swelling ratio and reswelling
kinetic than that of hydrogel formed by freezing method. With the increase in cellulose concentration and
CA cross-linker, the swelling ratio of the hydrogels reduced, while the reswelling kinetics increased. Most of
the hydrogels showed rnacroporous structure in SEM images. Heating hydrogels were more transparent
compared to freezing hydrogel . Hence, structure and properties of hydrogels could be changed by varying
the cellulose concentrations and CA concentrations. |
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