Oxidation of nanodiamonds and modulation of their assembly in polymer-based nanohybrids by field-inducement

Linear assembly of densely packed oxidized nanodiamonds (OxNDs) was performed in polymer-based nanohybrid films. A homogeneous suspension of the pre-polymer polyepoxide and OxNDs was placed onto a polyamide spacer and subjected to an electric field in order to induce the relocation and assembly of t...

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Bibliographic Details
Published in:Journal of materials science 2013-06, Vol.48 (12), p.4151-4162
Main Authors: Cho, Hong-Baek, Nguyen, Son Thanh, Nakayama, Tadachika, Huynh, Minh Triet Tan, Suematsu, Hisayuki, Suzuki, Tsuneo, Jiang, Weihua, Rozali, Shaifulazuar Bin, Tokoi, Yoshinori, Park, Yeung-Ho, Niihara, Koichi
Format: Article
Language:English
Subjects:
Assemblies
Assembly
Characterization and Evaluation of Materials
Chemical properties
Chemistry and Materials Science
Classical Mechanics
Crosslinking
Crystallography and Scattering Methods
Diamonds
Electric fields
Electric properties
Electrical conductivity
Electrical insulation
Electrical resistivity
Epoxy resins
Fillers
Materials Science
Modulation
Nanocomposites
Nanomaterials
Nanostructure
Oxidation
Oxidation-reduction reaction
Physical properties
Polyamide resins
Polyamides
Polymer films
Polymer industry
Polymer Sciences
Polymers
Relocation
Solid Mechanics
Thermal conductivity
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Summary:Linear assembly of densely packed oxidized nanodiamonds (OxNDs) was performed in polymer-based nanohybrid films. A homogeneous suspension of the pre-polymer polyepoxide and OxNDs was placed onto a polyamide spacer and subjected to an electric field in order to induce the relocation and assembly of the fillers before the mixture became cross-linked. The OxNDs suspended readily, forming linear assemblies of OxNDs (LAOxNDs) of varying thicknesses, aligned perpendicular to the film surfaces. Nanohybrid films with linear assemblies of LAOxNDs exhibited a moderate increase in thermal conductivity while maintaining the electrical insulation properties of the polyepoxide. Mechanisms for the field-induced fabrication and the structural variation of LAOxNDs in the pre-polymer matrix are elucidated in relation to the variations in physical properties. The present air oxidation process and field-induced application are simple but effective in enhancing the physical properties of polymer-based hybrids, and hence, has the potential for applying in the fabrication and modulation of nanocomposite materials.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-013-7228-6