Preparation and evaluation of hybrid composites of chemical fuel and multi-walled carbon nanotubes in the study of thermopower waves

Hayoung Hwang, Taehan Yeo, Yonghwan Cho, Dongjoon Shin, Wonjoon Choi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

When a chemical fuel at a certain position in a hybrid composite of the fuel and a micro/nanostructured material is ignited, chemical combustion occurs along the interface between the fuel and core materials. Simultaneously, dynamic changes in thermal and chemical potentials across the micro/nanostructured materials result in concomitant electrical energy generation induced by charge transfer in the form of a high-output voltage pulse. We demonstrate the entire procedure of a thermopower wave experiment, from synthesis to evaluation. Thermal chemical vapor deposition and the wet impregnation process are respectively employed for the synthesis of a multi-walled carbon nanotube array and a hybrid composite of picric acid/sodium azide/multi-walled carbon nanotubes. The prepared hybrid composites are used to fabricate a thermopower wave generator with connecting electrodes. The combustion of the hybrid composite is initiated by laser heating or Joule-heating, and the corresponding combustion propagation, direct electrical energy generation, and real-time temperature changes are measured using a highspeed microscopy system, an oscilloscope, and an optical pyrometer, respectively. Furthermore, the crucial strategies to be adopted in the synthesis of hybrid composite and initiation of their combustion that enhance the overall thermopower wave energy transfer are proposed.

Original languageEnglish
Article numbere52818
JournalJournal of Visualized Experiments
Volume2015
Issue number98
DOIs
Publication statusPublished - 2015 Apr 10

Keywords

  • Carbon nanotube
  • Chemical fuel
  • Combustion
  • Energy conversion
  • Engineering
  • Issue 98
  • Picric acid
  • Thermal transport
  • Thermopower wave

ASJC Scopus subject areas

  • Neuroscience(all)
  • Chemical Engineering(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Immunology and Microbiology(all)

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