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Journal of Materials Science

, Volume 55, Issue 4, pp 1553–1561 | Cite as

Interfacial interaction-induced temperature-dependent mechanical property of graphene-PDMS nanocomposite

  • Xin Wang
  • Zhekun Shi
  • Fandong Meng
  • Yan Zhao
  • Zhongshuai Wu
  • Yifeng Lei
  • Longjian XueEmail author
Composites & nanocomposites
  • 69 Downloads

Abstract

Polydimethylsiloxane (PDMS) and graphene-PDMS nanocomposites (GP) have been widely studied because of their excellent properties, of which the elastic modulus is very important for various applications. Here, the dependence of the elastic modulus of properly cured PDMS and GP on the temperature has been investigated. For both PDMS and GP, a critical temperature (Tc) has been found, which originates from the strong affinity of PDMS chains to the PDMS network and graphene sheet, as suggested by molecular dynamics simulation. Graphene inhibits the cross-linking of PDMS close to its surface, which leads to the reduced elastic modulus of GP (EGP). Only when the temperature is above Tc, EGP increases with temperature. This is the result of the entropy elasticity of PDMS and the re-initiated cross-linking of PDMS. However, the elastic moduli of PDMS and GP are independent of the temperature below Tc. Here, the study provides a guideline for the preparation and using of PDMS and its composite at various temperatures.

Notes

Acknowledgements

Authors thank Dr. Rakesh Das for the language editing of this article. The research was funded by National Key R&D Program of China (2018YFB1105100, 2016YFA0200200) and National Natural Science Foundation of China (51503156, 51973165).

Compliance with ethical standards

Conflict of interest

The authors declare no conflict of interest.

Supplementary material

10853_2019_4126_MOESM1_ESM.docx (8.3 mb)
Supplementary material 1 (DOCX 8462 kb)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Power and Mechanical Engineering & The Institute of Technological ScienceWuhan UniversityWuhanChina
  2. 2.Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalianChina

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