Boron Nitride Nanosheets (BNNSs) Chemically Modified by “Grafting-From” Polymerization of Poly(caprolactone) for Thermally Conductive Polymer Composites

Jinseong Lee, Haejong Jung, Seunggun Yu, Suk Man Cho, Vimal K. Tiwari, Dhinesh Babu Velusamy, Cheolmin Park

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

To meet the growing demand for rapid heat dissipation in electronic devices to ensure their reliable performance with a high level of safety, many polymer composites with thermally conductive but electrically insulating 2D boron nitride nanosheets (BNNSs) are being developed. Here we present an efficient way to enhance the thermal conductivity (TC) of a polymer composite by means of “grafting-from” polymerization of a poly(caprolactone) (PCL) onto BNNSs. The BNNSs, which were exfoliated from bulk BN by means of ultra-sonication, were prepared by means of radical oxidation. These oxidized BNNSs (oxi-BNNSs) were employed as initiators for subsequent ring-opening polymerization of PCL, which successfully resulted in PCL chemically grafted onto BNNSs (PCL-g-BNNSs). The excellent dispersion of PCL-g-BNNSs in common solvents allowed us to readily fabricate a polymer composite that contained PCL-g-BNNSs embedded in a PCL matrix, and the composite showed TC values that were five and nine times greater in the out-of-plane and in-plane mode, respectively, than those of pristine PCL.

Original languageEnglish
Pages (from-to)1921-1928
Number of pages8
JournalChemistry - An Asian Journal
Volume11
Issue number13
DOIs
Publication statusPublished - 2016 Jul 5

Bibliographical note

Funding Information:
This research was supported by the DAPA, ADD, and by the National Research Foundation of Korea (NRF), founded by the Korean government (MEST) (no. 2014R1A2A1A01005046).

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Organic Chemistry

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