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Novel alginate based nanocomposite hydrogels with incorporated silver nanoparticles

Alginate colloid solution containing electrochemically synthesized silver nanoparticles (AgNPs) was investigated regarding the nanoparticle stabilization and possibilities for production of alginate based nanocomposite hydrogels in different forms. AgNPs were shown to continue to grow in alginate so... Full description

Journal Title: Journal of Materials Science: Materials in Medicine 2012, Vol.23(1), pp.99-107
Main Author: Obradovic, Bojana
Other Authors: Stojkovska, Jasmina , Jovanovic, Zeljka , Miskovic-Stankovic, Vesna
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0957-4530 ; E-ISSN: 1573-4838 ; DOI: 10.1007/s10856-011-4522-1
Link: http://dx.doi.org/10.1007/s10856-011-4522-1
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recordid: springer_jour10.1007/s10856-011-4522-1
title: Novel alginate based nanocomposite hydrogels with incorporated silver nanoparticles
format: Article
creator:
  • Obradovic, Bojana
  • Stojkovska, Jasmina
  • Jovanovic, Zeljka
  • Miskovic-Stankovic, Vesna
subjects:
  • Nanotechnology
  • Biomimetics
  • Universities And Colleges
  • Nanoparticles
ispartof: Journal of Materials Science: Materials in Medicine, 2012, Vol.23(1), pp.99-107
description: Alginate colloid solution containing electrochemically synthesized silver nanoparticles (AgNPs) was investigated regarding the nanoparticle stabilization and possibilities for production of alginate based nanocomposite hydrogels in different forms. AgNPs were shown to continue to grow in alginate solutions for additional 3 days after the synthesis by aggregative mechanism and Ostwald ripening. Thereafter, the colloid solution remains stable for 30 days and could be used alone or in mixtures with aqueous solutions of poly(vinyl alcohol) (PVA) and poly( N -vinyl-2-pyrrolidone) (PVP) while preserving AgNPs as verified by UV–Vis spectroscopy studies. We have optimized techniques for production of Ag/alginate microbeads and Ag/alginate/PVA beads, which were shown to efficiently release AgNPs decreasing the Escherichia coli concentration in suspensions for 99.9% over 24 h. Furthermore, Ag/hydrogel discs based on alginate, PVA and PVP were produced by freezing-thawing technique allowing adjustments of hydrogel composition and mechanical properties as demonstrated in compression studies performed in a biomimetic bioreactor.
language: eng
source:
identifier: ISSN: 0957-4530 ; E-ISSN: 1573-4838 ; DOI: 10.1007/s10856-011-4522-1
fulltext: fulltext
issn:
  • 1573-4838
  • 15734838
  • 0957-4530
  • 09574530
url: Link


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titleNovel alginate based nanocomposite hydrogels with incorporated silver nanoparticles
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descriptionAlginate colloid solution containing electrochemically synthesized silver nanoparticles (AgNPs) was investigated regarding the nanoparticle stabilization and possibilities for production of alginate based nanocomposite hydrogels in different forms. AgNPs were shown to continue to grow in alginate solutions for additional 3 days after the synthesis by aggregative mechanism and Ostwald ripening. Thereafter, the colloid solution remains stable for 30 days and could be used alone or in mixtures with aqueous solutions of poly(vinyl alcohol) (PVA) and poly( N -vinyl-2-pyrrolidone) (PVP) while preserving AgNPs as verified by UV–Vis spectroscopy studies. We have optimized techniques for production of Ag/alginate microbeads and Ag/alginate/PVA beads, which were shown to efficiently release AgNPs decreasing the Escherichia coli concentration in suspensions for 99.9% over 24 h. Furthermore, Ag/hydrogel discs based on alginate, PVA and PVP were produced by freezing-thawing technique allowing adjustments of hydrogel composition and mechanical properties as demonstrated in compression studies performed in a biomimetic bioreactor.
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abstractAlginate colloid solution containing electrochemically synthesized silver nanoparticles (AgNPs) was investigated regarding the nanoparticle stabilization and possibilities for production of alginate based nanocomposite hydrogels in different forms. AgNPs were shown to continue to grow in alginate solutions for additional 3 days after the synthesis by aggregative mechanism and Ostwald ripening. Thereafter, the colloid solution remains stable for 30 days and could be used alone or in mixtures with aqueous solutions of poly(vinyl alcohol) (PVA) and poly( N -vinyl-2-pyrrolidone) (PVP) while preserving AgNPs as verified by UV–Vis spectroscopy studies. We have optimized techniques for production of Ag/alginate microbeads and Ag/alginate/PVA beads, which were shown to efficiently release AgNPs decreasing the Escherichia coli concentration in suspensions for 99.9% over 24 h. Furthermore, Ag/hydrogel discs based on alginate, PVA and PVP were produced by freezing-thawing technique allowing adjustments of hydrogel composition and mechanical properties as demonstrated in compression studies performed in a biomimetic bioreactor.
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