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Published in: Cellulose 9/2018

09-07-2018 | Original Paper

Increased solubility of plant core pulp cellulose for regenerated hydrogels through electron beam irradiation

Authors: Farah Nadia Mohammad Padzil, Sinyee Gan, Sarani Zakaria, Siti Fatahiyah Mohamad, Nor Hasimah Mohamed, Yung Bum Seo, Amanda V. Ellis

Published in: Cellulose | Issue 9/2018

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Abstract

High cellulose solubility is an essential to successful production of regenerated cellulose, from which hydrogels can be produced. Additionally, some pretreatment usually facilitates cellulose solubility. Bleached cellulose pulp from kenaf core (BK), consisting of lignin (0.3%), hemicellulose (5.2%) and ash (0%), was treated with an electron beam irradiation (EBI) at 10, 30, 50 and 70 kGy. The BK and irradiated bleached cellulose pulp (IK) were then dissolved in either sodium hydroxide/urea or lithium hydroxide/urea solvents which subsequently crosslinked with epichlorohydrin (ECH) solution to stabilize the formation of regenerated cellulose hydrogels. The amount of α-cellulose component in IK samples decreased as much as 38% and caused the viscosity average molecular weight (Mv) and degree of polymerization of IK samples to be reduced significantly by 84 and 87%, respectively. This resulted in an increase in cellulose solubility (up to 30%) for the IK samples in both solvent systems. However, this treatment resulted in a reduction in the overall cellulose fibre strength. X-ray diffraction of the hydrogels showed a transformation from cellulose I to amorphous cellulose. These hydrogels exhibited a higher degree of swelling, transparency and porosity compared to hydrogels prepared from non-irradiated pulp.

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Metadata
Title
Increased solubility of plant core pulp cellulose for regenerated hydrogels through electron beam irradiation
Authors
Farah Nadia Mohammad Padzil
Sinyee Gan
Sarani Zakaria
Siti Fatahiyah Mohamad
Nor Hasimah Mohamed
Yung Bum Seo
Amanda V. Ellis
Publication date
09-07-2018
Publisher
Springer Netherlands
Published in
Cellulose / Issue 9/2018
Print ISSN: 0969-0239
Electronic ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-018-1933-x

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