Journal
CARBOHYDRATE POLYMERS
Volume 91, Issue 1, Pages 305-313Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2012.08.038
Keywords
GA-chitosan; Poly (vinyl alcohol); Nano-silica; Blend film; Nanocomposite film; Fluorescence
Categories
Funding
- Innovation and Technology Commission of The Government of the Hong Kong Special Administrative Region, China [GHP/063/09TP]
Ask authors/readers for more resources
In this study, a commercial chitosan cross-linked with glutaraldehyde (GA-chitosan) having the autfluorescent property was effectively blended with a poly (vinyl alcohol) (PVA) matrix, in the formation of a transparent and fluorescent blend film. The fluorescent efficiency of the film was enhanced with red-shifted emission band by increasing the concentrations of the GA-chitosan and decreasing the PVA crystallinity. It was found that the incorporation of silica nanoparticles could further decrease the PVA crystallinity, enhance the fluorescent efficiency, and largely redshift the emission band, as compared with the neat GA-chitosan-PVA blend film. This fluorescent property could be finely tuned by careful doping of the silica nanoparticles and change of the PVA crystallinity. These phenomena could be reasonably explained by high extent of isolation of the fluorophores, increase of the stiffness of the fluorescent conjugated planar structure, and further decrease of the PVA crystallinity. In addition, the introduction of the nano-silica could improve the water and heat resistances of the GA-chitosan-PVA based silica nanocomposites. (C) 2012 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available