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Characterization of poly(vinyl alcohol)/gold nanocomposites obtained by in situ gamma‐irradiation method
Author(s) -
Radosavljević Aleksandra,
Božanić Dušan,
Bibić Nataša,
Mitrić Miodrag,
KačarevićPopović Zorica,
Nedeljković Jovan
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.34992
Subject(s) - vinyl alcohol , nanocomposite , materials science , thermal stability , fourier transform infrared spectroscopy , chemical engineering , nanoparticle , colloid , polymer , evaporation , aqueous solution , phase (matter) , absorption (acoustics) , colloidal gold , polymer chemistry , composite material , nanotechnology , chemistry , organic chemistry , physics , engineering , thermodynamics
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