Linear Assembly of Oxidized Surface Treated Nanodiamonds in Polymer-Based Nanohybrids by Electric Field Inducement

Abstract:

Linear assembly of densely packed oxidized nanodiamonds (OxNDs) was achieved in polyepoxide-based nanohybrid films. A homogeneous suspension of pre-polymer of polyepoxide and OxNDs was cast onto a polyamide-spacer and subjected to an electric field in order to induce relocation and stretched-assembles of the fillers before the mixture became cross-linked. The OxNDs suspended readily, forming linear assemblies of OxNDs (LAOxNDs) of varying thicknesses, and aligned vertical to the film surfaces. Nanohybrid films with assemblies of LAOxNDs led to a significant enhancement in thermal conductivity while maintained the electrical insulation property of the polyepoxide. Mechanisms for the formation and structural variation of LAOxNDs in the matrix are elaborated regarding the improvement in physical properties. The present ambient-oxidation process and field-induced application are simple, but effective in enhancing the thermal properties of the polymer-based hybrids, and hence, promising for applications in the semiconductor industry, such as thermal interface materials.

• Periodical: Materials Science Forum (Volume 761)
• Pages: 107-111
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.761.107
• Online since: July 2013
• Authors: Son Thanh Nguyen, Hong Baek Cho, Tadachika Nakayama, Minh Triet Tan Huynh, Hisayuki Suematsu, Tsuneo Suzuki, Wei Hua Jiang, Satoshi Tanaka, Yoshinori Tokoi, Koichi Niihara
• Keywords: Assembly, Electric Field, Nanodiamond, Nanohybrids, Surface Oxidation

References

[1] W. Zhao, H. Wang, H. Tang, G. Chen, Facile preparation of epoxy-based composite with oriented graphite nanosheets, Polymer. 47 (2006) 8401-8405.

DOI: 10.1016/j.polymer.2006.09.025

[2] K.D. Behler, A. Stravato, V. Mochalin, G. Korneva, G. Yushin, Y. Gogotsi, Nanodiamond-polymer composite fibers and coatings, ACSNANO 3(2) (2009) 363-369.

DOI: 10.1021/nn800445z

[3] S. Osswald, G. Yushin, V. Mochalin, S.O. Kucheyev, Y. Gogotsi, Control of sp2/sp3 carbon ratio and surface chemistry of nanodiamond powders by selective oxidation in air, J. Am. Chem. Soc. 128 (2006) 11635-11642.

DOI: 10.1021/ja063303n

[4] H-B. Cho, S.T. Nguyen, T. Nakayama, H. Suematsu, T. Suzuki, W. Jiang, S. Tanaka, B.S. Kim, K. Niihara, Polyepoxide-based nanohybrid films with self-assembled linear assemnblies of nanodiamonds, Acta Mater. 60 (2012) 7249-7257.

DOI: 10.1016/j.actamat.2012.09.039

[5] H-B. Cho, M. Shoji, T. Fujihara, T. Nakayama, H. Suematsu, T. Suzuki, K. Niihara, Anisotropic alignment of non-modified BN nanosheets in polysiloxane matrix under nano pulse width electricity, J. Ceram. Soc. Jpn. 118 (2010) 66-69.

DOI: 10.2109/jcersj2.118.66