Characterization of poly(vinyl alcohol)/gold nanocomposites obtained by in situ gamma-irradiation method

Gamma‐irradiation induced reduction of gold (Au) ions was performed in aqueous poly(vinyl alcohol) (PVA) solution. PVA/Au nanocomposites with different contents of inorganic phase were prepared by solvent evaporation. The colloids and corresponding nanocomposites show visible light absorption with s...

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Bibliographic Details
Published in:Journal of applied polymer science 2012-07, Vol.125 (2), p.1244-1251
Main Authors: RADOSAVLJEVIC, Aleksandra, BOZANIC, Dusan, BIBIC, Natasa, MITRIC, Miodrag, KACAREVIC-POPOVIC, Zorica, NEDELJKOVIC, Jovan
Format: Article
Language:English
Subjects:
Alcohols
Applied sciences
Au nanoparticles
Colloids
Composites
Exact sciences and technology
Forms of application and semi-finished materials
Gamma-irradiation
Gold
Materials science
Nanocomposites
optical properties
Polymer industry, paints, wood
Polymers
Polyvinyl alcohols
PVA/Au nanocomposites
Reduction
Solvents
Technology of polymers
thermal properties
Thermal resistance
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Summary:Gamma‐irradiation induced reduction of gold (Au) ions was performed in aqueous poly(vinyl alcohol) (PVA) solution. PVA/Au nanocomposites with different contents of inorganic phase were prepared by solvent evaporation. The colloids and corresponding nanocomposites show visible light absorption with strong excitonic peak in the wavelength range from 520 to 550 nm. Morphological and structural characterizations of gold nanoparticles (Au NPs) and nanocomposites were performed by TEM, XRD, and FTIR measurements. Also, Mie and Maxwell‐Garnett theories were applied to calculate optical properties of Au colloids and PVA/Au nanocomposites, respectively. The changes of heat resistance upon the increase of inorganic phase were correlated to the decrease in crystal perfection of polymer. Improvement of thermal stability of nanocomposites, compared with the neat PVA, was observed when the content of inorganic phase exceeds 1 wt %. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
ISSN:0021-8995
1097-4628
DOI:10.1002/app.34992