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Synthesis and characterisation of cross-linked chitosan composites functionalised with silver and gold nanoparticles for antimicrobial applications.

Authors :
Ryan, Catherine
Alcock, Emma
Buttimer, Finbarr
Schmidt, Michael
Clarke, David
Pemble, Martyn
Bardosova, Maria
Source :
Science & Technology of Advanced Materials; 2017, Vol. 18 Issue 1, p528-540, 13p
Publication Year :
2017

Abstract

We present a study of a range of cross-linked chitosan composites with potential antimicrobial applications. They were formed by cross-linking chitosan and siloxane networks and by introducing silver and gold nanoparticles (NPs). The aim was to investigate whether adding the metal NPs to the chitosan-siloxane composite would lead to a material with enhanced antimicrobial ability as compared to chitosan itself. The composites were synthesised in hydrogel form with the metal NPs embedded in the cross-linked chitosan network. Spectroscopic and microscopic techniques were employed to investigate the structural properties of the composite and the tensile strength of the structures was measured. It was found that the addition of metal NPs did not influence the mechanical strength of the composite. A crystal violet attachment assay results displayed a significant reduction in the attachment of E. coli to the cross-linked chitosan surfaces. Release profile tests suggest that the metal NPs do not contribute to the overall antimicrobial activity under neutral conditions. The contribution to the mechanical and antimicrobial properties from cross-linking with siloxane is significant, giving rise to a versatile, durable, antimicrobial material suitable for thin film formation, wound dressings or the coating of various surfaces where robustness and antimicrobial control are required. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
14686996
Volume :
18
Issue :
1
Database :
Complementary Index
Journal :
Science & Technology of Advanced Materials
Publication Type :
Academic Journal
Accession number :
134622483
Full Text :
https://doi.org/10.1080/14686996.2017.1344929