Preparation of novel xGNPs/SBS composites with enhanced dielectric constant and thermal conductivity

Jun Jun Chen, Shi Hao Qin, Qun Chen Lv, Dong Liang Shi, Xu Min Zheng, Hui Jun Wu, Hua Kun Huang, Liu Guang Lian, Fu An He, Kwok Ho Lam

Research output: Journal article publicationJournal articleAcademic researchpeer-review

8 Citations (Scopus)

Abstract

Polystyrene-block-polybutadiene-block-polystyrene triblock copolymer (SBS) has the potential to be used as a dielectric elastomer for actuator, sensor, energy harvesting, and so on, but its low dielectric constant and thermal conductivity seriously limit this application. In this study, novel exfoliated graphite nanoplates (xGNPs)/SBS composites were prepared by a solution-blending method using N,N-dimethylformamide and tetrahydrofuran as co-solvents. Wide-angle X-ray diffraction measurement confirms that xGNPs have been incorporated into SBS. Furthermore, the result of scanning electron microscopy shows that xGNPs disperse well in the SBS matrix. The effects of xGNPs on the dielectric constant and thermal conductivity of the resultant xGNPs/SBS composites were investigated. The dielectric constant at 1,000 Hz significantly increased from 2.72 for pure SBS to 15.96 and 40.94 for xGNPs/SBS composite containing 1.19 and 1.27 vol.% of xGNPs, respectively. Moreover, the thermal conductivity of the xGNPs/SBS composite containing 1.27 vol.% of xGNPs has been improved from 0.18 to 0.41 W/m·K in comparison with that of pure SBS.
Original languageEnglish
JournalAdvances in Polymer Technology
DOIs
Publication statusAccepted/In press - 1 Jan 2017

Keywords

  • SBS
  • Composites
  • Dielectric constant
  • Thermal conductivity
  • xGNPs

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Organic Chemistry
  • Polymers and Plastics

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