Self-assembled block copolymer micelles with silver-carbon nanotube hybrid fillers for high performance thermal conduction

Jae Ryung Choi, Seunggun Yu, Haejong Jung, Sun Kak Hwang, Richard Hahnkee Kim, Giyoung Song, Sung Hwan Cho, Insung Bae, Soon Man Hong, Chong Min Koo, Cheolmin Park

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The development of polymer-filled composites with an extremely high thermal conductivity (TC) that is competitive with conventional metals is in great demand due to their cost-effective process, light weight, and easy shape-forming capability. A novel polymer composite with a large thermal conductivity of 153 W m-1 K-1 was prepared based on self-assembled block copolymer micelles containing two different fillers of micron-sized silver particles and multi-walled carbon nanotubes. Simple mechanical mixing of the components followed by conventional thermal compression at a low processing temperature of 160°C produced a novel composite with both structural and thermal stability that is durable for high temperature operation up to 150°C as well as multiple heating and cooling cycles of ΔT = 100°C. The high performance in thermal conduction of our composite was mainly attributed to the facile deformation of Ag particles during the mixing in a viscous thermoplastic medium, combined with networked carbon nanotubes uniformly dispersed in the nanoscale structural matrix of block copolymer micelles responsible for its high temperature mechanical stability. Furthermore, micro-imprinting on the composite allowed for topographically periodic surface micropatterns, which offers broader suitability for numerous micro-opto-electronic systems.

Original languageEnglish
Pages (from-to)1888-1895
Number of pages8
JournalNanoscale
Volume7
Issue number5
DOIs
Publication statusPublished - 2015 Feb 7

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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    Choi, J. R., Yu, S., Jung, H., Hwang, S. K., Kim, R. H., Song, G., Cho, S. H., Bae, I., Hong, S. M., Koo, C. M., & Park, C. (2015). Self-assembled block copolymer micelles with silver-carbon nanotube hybrid fillers for high performance thermal conduction. Nanoscale, 7(5), 1888-1895. https://doi.org/10.1039/c4nr06390b