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Poly (vinyl alcohol)/graphene oxide nanocomposite films and hydrogels prepared by gamma ray

Frounchi, M ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1080/14658011.2018.1441779
  3. Publisher: Taylor and Francis Ltd , 2019
  4. Abstract:
  5. Poly (vinyl alcohol)/graphene oxide (PVA/GO) gamma irradiated nanocomposite films and hydrogels were prepared. In composite films, GO was initially irradiated by gamma ray in order to improve interactions between GO and PVA. The film containing 1 wt-% GO was very strong where tensile modulus and tensile yield strength were 45 and 115% higher than those of pure PVA. In the second set of experiments PVA/GO hydrogels were made by irradiating PVA/GO suspensions by gamma ray at various doses. It was an interesting finding that GO increased the gel portion of hydrogels through contribution of H-bonds between PVA and GO. The hydrogels prepared at 20 kGy had remarkable water swelling ratio that reached as high as 20 at water temperature of 80°C. The hydrogel metal ion adsorption capability was tested on Cu2+ ions. It was shown that the GO contributed significantly to the adsorption capacity of PVA hydrogels. © 2018, © 2018 Institute of Materials, Minerals and Mining Published by Taylor & Francis on behalf of the Institute
  6. Keywords:
  7. Gamma ray ; Hydrogel ; Ion adsorbent ; PVA ; Film preparation ; Graphene ; Graphene oxide ; Hydrogels ; Metal ions ; Metals ; Nanocomposite films ; Nanocomposites ; Oxide films ; Polyvinyl alcohols ; Adsorption capacities ; H-bonds ; Metal ion adsorption ; PVA hydrogel ; Tensile yield strength ; Water swelling ; Water temperatures ; Gamma rays
  8. Source: Plastics, Rubber and Composites ; Volume 48, Issue 2 , 2019 , Pages 42-47 ; 14658011 (ISSN)
  9. URL: https://www.tandfonline.com/doi/abs/10.1080/14658011.2018.1441779