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Int. J. Mol. Sci. 2015, 16(6), 13973-13988; doi:10.3390/ijms160613973

Adsorption of Silver Nanoparticles onto Different Surface Structures of Chitin/Chitosan and Correlations with Antimicrobial Activities

1
Research Institute, National Defense Medical College, Saitama 359-1324, Japan
2
Kobe VN Beef Corporation, Bao Loc City 670000, Vietnam
3
Department of Applied Chemistry and Chemical Engineering National Institute of Technology, Toyama College, Toyama 939-8630, Japan
*
Author to whom correspondence should be addressed.
Academic Editors: Hitoshi Sashiwa and Shinsuke Ifuku
Received: 9 May 2015 / Revised: 12 June 2015 / Accepted: 12 June 2015 / Published: 18 June 2015
(This article belongs to the Special Issue Chitins 2015)
View Full-Text   |   Download PDF [3070 KB, uploaded 18 June 2015]   |  

Abstract

Size-controlled spherical silver nanoparticles (Ag NPs) can be simply prepared by autoclaving mixtures of glass powder containing silver with glucose. Moreover, chitins with varying degrees of deacetylation (DDAc < 30%) and chitosan powders and sheets (DDAc > 75%) with varying surface structure properties have been evaluated as Ag NP carriers. Chitin/chitosan-Ag NP composites in powder or sheet form were prepared by mixing Ag NP suspensions with each of the chitin/chitosan-based material at pH 7.3, leading to homogenous dispersion and stable adsorption of Ag NPs onto chitin carriers with nanoscale fiber-like surface structures, and chitosan carriers with nanoscale porous surface structures. Although these chitins exhibited mild antiviral, bactericidal, and antifungal activities, chitin powders with flat/smooth film-like surface structures had limited antimicrobial activities and Ag NP adsorption. The antimicrobial activities of chitin/chitosan-Ag NP composites increased with increasing amounts of adsorbed Ag NPs, suggesting that the surface structures of chitin/chitosan carriers strongly influence adsorption of Ag NPs and antimicrobial activities. These observations indicate that chitin/chitosan-Ag NPs with nanoscale surface structures have potential as antimicrobial biomaterials and anti-infectious wound dressings. View Full-Text
Keywords: silver nanoparticles; chitin; chitosan; surface structure; antimicrobial activity silver nanoparticles; chitin; chitosan; surface structure; antimicrobial activity
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Ishihara, M.; Nguyen, V.Q.; Mori, Y.; Nakamura, S.; Hattori, H. Adsorption of Silver Nanoparticles onto Different Surface Structures of Chitin/Chitosan and Correlations with Antimicrobial Activities. Int. J. Mol. Sci. 2015, 16, 13973-13988.

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