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Cellulose

Erschienen in:

01.06.2012

Hybrid electrospun nonwovens from chitosan/cellulose acetate

verfasst von: George Salihu, Parikshit Goswami, Stephen Russell

Erschienen in: Cellulose | Ausgabe 3/2012

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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.

Vorheriger Artikel Sustainable nanocomposite films based on bacterial cellulose and pullulan

Nächster Artikel Compression molded wood pulp biocomposites: a study of hemicellulose influence on cellulose supramolecular structure and material properties

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Titel: Hybrid electrospun nonwovens from chitosan/cellulose acetate
verfasst von: George Salihu
Parikshit Goswami
Stephen Russell
Publikationsdatum: 01.06.2012
Verlag: Springer Netherlands
Erschienen in: Cellulose / Ausgabe 3/2012
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI: https://doi.org/10.1007/s10570-012-9666-8

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