Green synthesis of colloidal silver nanoparticles reinforced PVA-corn starch hydrogel films

Hydrogels of poly (vinyl alcohol) (PVA) are versatile materials with great potential in biomedical and pharmaceutical applications. Reinforcement of silver nanoparticles into PVA matrix may offer excellent antibacterial properties. Among various physical and chemical methods (viz. chemical reduction...

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Bibliographic Details
Main Authors: Desphande, Deepti S., Bajpai, A. K.
Format: Conference Proceeding
Language:English
Subjects:
Biomedical materials
Chemical reduction
Chemical synthesis
Corn
Elasticity
Gold
Hydrogels
Nanomaterials
Nanoparticles
Organic chemistry
Scanning electron microscopy
Silver
Spectrophotometry
Sustainable development
Thermal decomposition
Viscoelasticity
X-ray diffraction
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Summary:Hydrogels of poly (vinyl alcohol) (PVA) are versatile materials with great potential in biomedical and pharmaceutical applications. Reinforcement of silver nanoparticles into PVA matrix may offer excellent antibacterial properties. Among various physical and chemical methods (viz. chemical reduction, thermal decomposition etc.) for synthesizing silver nanoparticles, biological methods have been suggested as possible eco-friendly alternatives. In the present work a novel approach for the green synthesis of colloidal silver nanoparticles films has been achieved using environmentally acceptable plant extracts of Catharanthus roseus (C. roseus) Linn. G. Don. Following the proposed approach, in the present study PVA/corn starch based hybrid hydrogels have been designed and characterized. Due to the visco-elastic behavior, the corn starch is expected to impart mechanical strength to the synthesized films. The hydrogels were characterized by the techniques such as ultraviolet-visible (UV-Vis) spectrophotometry, scanning electron microscopy (SEM), and X-ray diffraction. SEM analysis showed the formation of silver nanoparticles having needle-like structures. The X-ray diffraction results clearly showed that the silver nanoparticles were formed by the reduction of Ag+ ions by the C. roseus leaf extract and were crystalline in nature. Thus, it can be concluded that the leaves of C. roseus can be an environmentally and economically viable source for the synthesis of silver nanoparticles. The antibacterial nature of the synthesized green films warrants development of value added nanomaterials for various biomedical applications.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.5098714