Modification of BN nanosheets and their thermal conducting properties in nanocomposite film with polysiloxane according to the orientation of BN

Cho, Hong‐Baek; Tokoi, Yoshinori; Tanaka, Satoshi; Suematsu, Hisayuki; Suzuki, Tsuneo; Jiang, Weihua; Niihara, Koichi; Nakayama, Tadachika

doi:10.1016/j.compscitech.2011.03.002

Cited by 110 publications

(61 citation statements)

References 23 publications

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“…This result is consistent with the direction-dependent thermal transport properties of h-BN platelets, where the thermal conductivity of h-BN sheets is 20 times higher within the planes than perpendicular to them. 25 Therefore, these results obviously demonstrate an effective way of achieving an outstanding thermal transfer performance even at relatively low h-BN loadings, resulting from efficient thermal transfer pathways attributed to anisotropic alignments of h-BN sheets in an epoxy matrix obtained using a magnet. In general, the vertical ordering of magnetic h-BN powders is complexly determined from the balance between the viscosity of mixed resins, force, and direction of the applied magnetic field and magnetic characteristics of the hybrid particles.…”

Section: ■ Results and Discussionmentioning

confidence: 96%

Anisotropically Alignable Magnetic Boron Nitride Platelets Decorated with Iron Oxide Nanoparticles

et al. 2013

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To effectively utilize the anisotropic characteristics of hexagonal boron nitride (h-BN), we have developed magnetic h-BN hybrid platelets decorated with iron oxide (Fe 3 O 4 ) nanoparticles, which are used as magnetic carriers for tailoring the anisotropy of h-BN. The as-synthesized Fe 3 O 4 -coated h-BN powders can easily move under a relatively low magnetic field. With the aid of iron oxide nanoparticles, h-BN platelets randomly dispersed in an epoxy matrix are successfully reoriented in a direction vertical to the film plane. Moreover, by utilizing the anisotropic characteristics of h-BN platelets, Fe 3 O 4 -coated h-BN/ epoxy composites exhibit exceptional performance in terms of in-plane thermal conductivity. This result is attributed to an improvement in the heat-transport pathways in composite films due to the anisotropic ordering of thermally conductive h-BN sheets. The Fe 3 O 4 -decorated h-BN platelets will be promising candidates for significantly improving the performances of advanced electronic devices that require excellent thermal conductivity and electrical insulation.

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Section: ■ Results and Discussionmentioning

confidence: 96%

Anisotropically Alignable Magnetic Boron Nitride Platelets Decorated with Iron Oxide Nanoparticles

et al. 2013

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“…With 30 vol% BN, the thermal conductivity for the vertically aligned nanocomposite was 20% higher than the randomly aligned counterpart [244]. At 1.0 vol% graphene loading, the thermal conductivity of the nanocomposite in a parallel magnetic-alignment direction increased 139% and 41% compared with the perpendicular alignment direction and the nanocomposites with randomly dispersed graphene, respectively [243].…”

Section: Alignment By a Magnetic Fieldmentioning

confidence: 93%

Transport performance in novel elastomer nanocomposites: Mechanism, design and control

Guo

Tang

Zhang

2016

Progress in Polymer Science

138

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“…The inclusion of BN increases both thermal conductivity and thermal stability, while decreases the coefficient of thermal expansion. Cho et al [26] reported a facile technique that modified BN nanosheets with iron oxides in order to fabricate highly oriented polysiloxane/BN nanosheet composite films. The thermal property of polysiloxane/BN nanosheet composite film was determined by the orientation of BN, and the thermal conductivity of composite film was enhanced by 20 times after addition of BN nanosheets.…”

Section: Working Principlementioning

confidence: 99%

Hexagonal boron nitride nanosheets incorporated antireflective silica coating with enhanced laser-induced damage threshold

Wang

et al. 2018

High Pow Laser Sci Eng

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Boron nitride (BN) nanosheets incorporated silica antireflective (AR) coating was successfully prepared on fused silica substrate to improve the antilaser-damage ability of transmissive optics used in high-power laser systems. The BN nanosheets were obtained by urea assisted solid exfoliation, and then incorporated into basic-catalyzed silica sols without any further treatment. The transmission electron microscope (TEM) images indicated that the BN nanosheets generally consisted of 2-10 layers. The antireflective BN/SiO 2 coating exhibited excellent transmittance as high as 99.89% at 351 nm wavelength on fused silica substrate. The thermal conductivity 0.135 W · m −1 · K −1 of the BN/SiO 2 coating with 10% BN addition was about 23% higher than 0.11 W · m −1 · K −1 of the pure SiO 2 AR coating. The laser-induced damage threshold (LIDT) of that BN/SiO 2 coating is also 23.1% higher than that of pure SiO 2 AR coating. This research provides a potential application of BN/SiO 2 coatings in high-power laser systems.

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Modification of BN nanosheets and their thermal conducting properties in nanocomposite film with polysiloxane according to the orientation of BN

Cited by 110 publications

References 23 publications

Anisotropically Alignable Magnetic Boron Nitride Platelets Decorated with Iron Oxide Nanoparticles

Anisotropically Alignable Magnetic Boron Nitride Platelets Decorated with Iron Oxide Nanoparticles

Transport performance in novel elastomer nanocomposites: Mechanism, design and control

Hexagonal boron nitride nanosheets incorporated antireflective silica coating with enhanced laser-induced damage threshold

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