Hybrid Electrospun Nonwovens from Chitosan/Cellulose Acetate

Salihu, George, Goswami, Parikshit and Russell, Stephen J. (2012) Hybrid Electrospun Nonwovens from Chitosan/Cellulose Acetate. Cellulose, 19 (3). pp. 739-749. ISSN 0969-0239

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Abstract

Co-mixtures of chitosan (CS) and cellulose acetate (CA) were electrospun into fibrous webs from a binary co-solvent containing 70:30 trifluoroacetic acid (TFA): methylene chloride (DCM). Fibrous webs were produced from CS/CA in ratios (wt%) of 20:80, 40:60, 50:50 and 60:40. As determined by SEM analysis, 12% polymer solutions of CS/CA 60:40 produced structures with uniform bead free fibre morphologies with an average fibre diameter of 458 nm. FTIR-spectroscopy confirmed the presence of CS in the as-spun fibres in the form of chitosan-amine trifluoroacetate salts (NH3+CF3COO−). Uniform mixing of the CS and CA components was confirmed by DSC analyses. Alkaline neutralisation of the chitosan amine salts was explored as a means of increasing wet stability. The as-spun fibres were found to be relatively unstable in aqueous medium due to the solubility of the chitosan amine salts. Alkaline post-neutralisation was evaluated as means of minimising weight loss and maximising retention of fibrous structure.

Item Type:	Article
Uncontrolled Keywords:	Nonwovens; Hybrid fibres; Biopolymers; Chitosan; Cellulose acetate; Electrospinning
Subjects:	Q Science > QH Natural history > QH301 Biology T Technology > TS Manufactures
Schools:	School of Art, Design and Architecture
Related URLs:	Publisher
Depositing User:	Jonathan Cook
Date Deposited:	06 Sep 2017 13:49
Last Modified:	27 Mar 2018 11:46
URI:	http://eprints.hud.ac.uk/id/eprint/33141

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