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Abstract <p>In the present study, facile and green method for h-BN ultrasonic exfoliation was proposed. Exfoliated hexagonal boron nitride nanosheets characterized via transmission electron microscopy, atomic force microscopy as well as static light scattering, were used as fillers in silicone-based films, which enabled to significantly increase both their in-plane thermal conductivity and anisotropy of thermal properties (increase of 23.9 and 4.8 times, respectively, as compared to pure silicone). Composite films exhibited in-plane and through-plane thermal conductivity of 2.653 and 0.529 W/m K, respectively. At the same time, composites showed excellent electrical insulation properties—high volume resistance (10<sup>16</sup> Ohm cm), low permittivity (2.6) and dielectric loss tangent (0.02) at frequencies below 400 kHz.</p>

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Boron Nitride Nanosheets as Prospective Filler for Dielectric Thermally Conductive Elastomeric Films

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • N. S. Romanov,
  • E. A. Danilov,
  • I. A. Komarov

摘要

Abstract

In the present study, facile and green method for h-BN ultrasonic exfoliation was proposed. Exfoliated hexagonal boron nitride nanosheets characterized via transmission electron microscopy, atomic force microscopy as well as static light scattering, were used as fillers in silicone-based films, which enabled to significantly increase both their in-plane thermal conductivity and anisotropy of thermal properties (increase of 23.9 and 4.8 times, respectively, as compared to pure silicone). Composite films exhibited in-plane and through-plane thermal conductivity of 2.653 and 0.529 W/m K, respectively. At the same time, composites showed excellent electrical insulation properties—high volume resistance (1016 Ohm cm), low permittivity (2.6) and dielectric loss tangent (0.02) at frequencies below 400 kHz.