Journal
CARBOHYDRATE POLYMERS
Volume 75, Issue 3, Pages 463-471Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2008.08.009
Keywords
Silver nanoparticles; Carboxymethyl cellulose; Gum Acacia; Starch; Autoreduction; Antibacterial activity; Biomedical application
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Funding
- Defense Research and Development Organization
- Ministry of Defence, Government of India, New Delhi
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In the present study, we report the preparation of semi interpenetrating hydrogel networks (SIHNs) based on cross-linked poly (acrylamide) prepared through an optimized rapid redox-solution polymerization with N,N'-methylenebisacrylamide (MBA) in presence of three different carbohydrate polymers, namely gum acacia (GA), carboxymethylcellulose (CMC) and starch (SR). Highly stable and uniformly distributed silver nanoparticles have been obtained with hydrogel networks as nanoreactors via in situ reduction of silver nitrate (AgNO3) using sodium borohydride (NaBH4) as reducing agent. The formation of silver nanoparticles has been confirmed with ultraviolet visible (UV-vis) spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD) analyses. Thermogravimetric analysis (TGA) provides the amounts of silver nanoparticles exist in the hydrogel networks. Transmission electron microscopy (TEM) results demonstrate that acacia employed hydrogels have regulated the silver nanoparticles size to 2-5 run where as CIVIC and starch composed hydrogel networks result in a heterogeneous size front 2 to 20 nm. The preliminary antibacterial activity performed to these hydrogel-silver nanocomposites. (C) 2008 Elsevier Ltd. All rights reserved.
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