Breathing-in/breathing-out approach to preparing nanosilver-loaded hydrogels

Highly efficient antibacterial nanocomposites

Varsha Thomas, Murali Yallapu, B. Sreedhar, S. K. Bajpai

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The key objective of developing novel materials for hygienic living conditions is to lower the risk of transmitting diseases and biofouling. To this end, a number of silver-hydrogel nanocomposite systems are under development. In this study, we attempted a unique strategy to prepare silver-nanoparticle- loaded poly(acrylamide-co-N-vinyl-2-pyrolidone) hydrogel composites. To load, nanosilver particles into such a nonionic hydrogel, a novel breathing-in/ breathing-out (BI-BO) approach was employed. As the number of BI-BO cycles increased, the amount of the silver nanoparticles loaded into these hydrogels also increased. This behavior was obvious and was confirmed by ultraviolet-visible spectroscopy and thermal analysis. Furthermore, the hydrogel-silver-nanoparticle composites were confirmed with Fourier transform infrared spectroscopy and transmission electron microscopy studies. Antibacterial studies of these hydrogel-silver nanocomposites showed excellent results against Escherichia coli. The antibacterial activity increased with the number of BI-BO cycles, and samples that underwent three BI-BO cycles showed optimal bactericidal activity. The degree of crosslinking and the silver content had a great influence on the antibacterial efficacy.

Original languageEnglish (US)
Pages (from-to)934-944
Number of pages11
JournalJournal of Applied Polymer Science
Volume111
Issue number2
DOIs
StatePublished - Jan 15 2009
Externally publishedYes

Fingerprint

Hydrogels
Silver
Hydrogel
Nanocomposites
Nanoparticles
Biofouling
Infrared transmission
Ultraviolet visible spectroscopy
Composite materials
Polyacrylates
Crosslinking
Thermoanalysis
Escherichia coli
Particles (particulate matter)
Fourier transform infrared spectroscopy
Transmission electron microscopy

All Science Journal Classification (ASJC) codes

  • Materials Chemistry
  • Polymers and Plastics
  • Surfaces, Coatings and Films
  • Chemistry(all)

Cite this

Breathing-in/breathing-out approach to preparing nanosilver-loaded hydrogels : Highly efficient antibacterial nanocomposites. / Thomas, Varsha; Yallapu, Murali; Sreedhar, B.; Bajpai, S. K.

In: Journal of Applied Polymer Science, Vol. 111, No. 2, 15.01.2009, p. 934-944.

Research output: Contribution to journalArticle

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