• Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/044/0164

    • Keywords

       

      EPS; graphene oxide; reduced graphene oxide; composite; differential thermal analysis; mechanical properties.

    • Abstract

       

      Graphene oxide (GO) acts as an insulator but when reduced to reduced graphene oxide (RGO), it has high heat storage capacity. This can result in lowering the phase change temperature when embedded in a material such as expanded polystyrene (EPS), thus making it a good heat-resistance material. In this study, the thermal and the mechanical effects of GO and RGOs over EPS were analysed. GO was synthesized using modified Hummer’s method, while the reduction process was taken through different routes using three different reductants: hydrazine (RGO-HZ), ascorbic acid (RGO-AA) and the extract of Amaranthus hybridus (RGO-AH). The same content of graphite and its derivatives were separately and chemically bonded together with EPS forming composites (i.e., graphite composite, GO composite, RGO-HZ composite, RGO-AA composite and RGO-AH composite) and cast on a mould at room temperature to form a dog-bone shape. Fourier transform infrared spectroscopy, differential thermal analysis, scanning electron microscopy and mechanical tests were conducted on ordinary EPS and on each of the composite samples. The results showed a significant enhancement of thermal and mechanical properties of the composites over ordinary EPS.

    • Author Affiliations

       

      ISAAC O FANIYI1 BOLUTIFE OLOFINJANA1 OLADEPO FASAKIN1 EMMANUEL AJENIFUJA2 FRANCIS I ALO3 MARCUS A ELERUJA1 EZEKIEL O B AJAYI1

      1. Department of Physics and Engineering Physics, Obafemi Awolowo University, Ile-Ife 220005, Nigeria
      2. Center for Energy Research and Development, Obafemi Awolowo University, Ile-Ife 220005, Nigeria
      3. Department of Materials Science and Engineering, Obafemi Awolowo University, Ile-Ife 220005, Nigeria
    • Dates

       
  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2021-2022 Indian Academy of Sciences, Bengaluru.