Hybrid electrospun nonwovens from chitosan/cellulose acetate

George Salihu, Parikshit Goswami, Stephen Russell

Research output: Contribution to journalArticle

14 Citations (Scopus)

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 (NH 3 +CF 3COO -). 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.

Original languageEnglish
Pages (from-to)739-749
Number of pages11
JournalCellulose
Volume19
Issue number3
Early online date16 Feb 2012
DOIs
Publication statusPublished - Jun 2012
Externally publishedYes

Fingerprint

Chitosan
Cellulose
Amines
Trifluoroacetic Acid
Fibers
Salts
Trifluoroacetic acid
acetylcellulose
Methylene Chloride
Dichloromethane
Polymer solutions
Solubility
Spectroscopy
Scanning electron microscopy

Cite this

Salihu, George ; Goswami, Parikshit ; Russell, Stephen. / Hybrid electrospun nonwovens from chitosan/cellulose acetate. In: Cellulose. 2012 ; Vol. 19, No. 3. pp. 739-749.
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Hybrid electrospun nonwovens from chitosan/cellulose acetate. / Salihu, George; Goswami, Parikshit; Russell, Stephen.

In: Cellulose, Vol. 19, No. 3, 06.2012, p. 739-749.

Research output: Contribution to journalArticle

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AU - Goswami, Parikshit

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