Dissolution and regeneration of cellulose from recycled papers with naoh/thiourea/urea aqueous solution

Yek, Mee Da (2010) Dissolution and regeneration of cellulose from recycled papers with naoh/thiourea/urea aqueous solution. [Final Year Project Report] (Unpublished)

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Abstract

The regenerated celluloses were prepared by the dissolution of two different cellulosic materials derived from recycled papers in an aqueous-ba~ed solution of NaOH/thiourea/urea with the ratio of 8:6,5:8 by weight. The cellulose solutions were undergone freeze and thaw process before they were precipitated with the non-solvent, ethanol to form the regenerated cellulose, In another approach, cellulosic samples were cross-linked with sodium trimetaphosphate (STMP) in different mole ratios to identilY the highest degree of cross-linking of the regenerated crosslinked cellulose formed respectively. The products obtained were analyzed by their SEM micrographs and FfIR spectra, The results showed that the STMP has effective cross-linking action on the cellulosic samples and the SEM micrograph for the regenerated cross-linked cellulose showed that it had individual agglomerate with high porosity, brittle and rigid compared to that of regenerated cellulose without cross-linked which had several agglomerates joined together, These results lead to a conclusion that the regenerated cross-linked cellulose could be potential to be used in drug delivery.

Item Type: Final Year Project Report
Additional Information: Project Report (B.Sc.) -- Universiti Malaysia Sarawak, 2010.
Uncontrolled Keywords: Cellulosic sample, dissolution, regenerated cellulose, STMP, regenerated crossI inked cellulose, unimas, university, universiti, Borneo, Malaysia, Sarawak, Kuching, Samarahan, ipta, education, undergraduate, research, Universiti Malaysia Sarawak.
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
Divisions: Academic Faculties, Institutes and Centres > Faculty of Resource Science and Technology
Depositing User: Gani
Date Deposited: 15 Jul 2019 00:43
Last Modified: 13 Sep 2021 13:23
URI: http://ir.unimas.my/id/eprint/25822

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