Enhanced thermal conductivity of a polysilazane-coated A-BN/epoxy composite following surface treatment with silane coupling agents

Jaehyun Wie; Myeongjin Kim; Jooheon Kim

doi:10.1016/j.apsusc.2020.147091

Enhanced thermal conductivity of a polysilazane-coated A-BN/epoxy composite following surface treatment with silane coupling agents

Jaehyun Wie, Myeongjin Kim, Jooheon Kim

Major in Hydrogen & Renewable Energy

Chung-Ang University

Research output: Contribution to journal › Article › peer-review

51 Scopus citations

Abstract

Spherically aggregated boron nitride (BN) is advantageous for improving thermal conductivity. However, it is difficult to process due to its fragility and poor wettability. Herein we report coating boron nitride aggregates with polysilazane (PSZ) and three different silanes, glycidoxypropyltrimethoxysilane (GPTMS), aminopropyltriethoxysilane (APTES), and mercaptopropyltrimethoxysilane (MPTMS), via hydrolysis and condensation. The PSZ coating protected BN from external force, and the silane coatings enhanced interfacial adhesion between the filler and the matrix. An epoxy composite contained the BN surface modified with PSZ and APTES had the highest thermal conductivity of 11.8 W m⁻¹ K⁻¹ at a filler fraction of 75 wt%. Its thermal conductivity was 62 times higher than that of the neat epoxy.

Original language	English
Article number	147091
Journal	Applied Surface Science
Volume	529
DOIs	https://doi.org/10.1016/j.apsusc.2020.147091
State	Published - 1 Nov 2020

Keywords

Polymer-matrix composites (PMCs)
Surface modification
Thermal conductivity

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title = "Enhanced thermal conductivity of a polysilazane-coated A-BN/epoxy composite following surface treatment with silane coupling agents",

abstract = "Spherically aggregated boron nitride (BN) is advantageous for improving thermal conductivity. However, it is difficult to process due to its fragility and poor wettability. Herein we report coating boron nitride aggregates with polysilazane (PSZ) and three different silanes, glycidoxypropyltrimethoxysilane (GPTMS), aminopropyltriethoxysilane (APTES), and mercaptopropyltrimethoxysilane (MPTMS), via hydrolysis and condensation. The PSZ coating protected BN from external force, and the silane coatings enhanced interfacial adhesion between the filler and the matrix. An epoxy composite contained the BN surface modified with PSZ and APTES had the highest thermal conductivity of 11.8 W m−1 K−1 at a filler fraction of 75 wt%. Its thermal conductivity was 62 times higher than that of the neat epoxy.",

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AB - Spherically aggregated boron nitride (BN) is advantageous for improving thermal conductivity. However, it is difficult to process due to its fragility and poor wettability. Herein we report coating boron nitride aggregates with polysilazane (PSZ) and three different silanes, glycidoxypropyltrimethoxysilane (GPTMS), aminopropyltriethoxysilane (APTES), and mercaptopropyltrimethoxysilane (MPTMS), via hydrolysis and condensation. The PSZ coating protected BN from external force, and the silane coatings enhanced interfacial adhesion between the filler and the matrix. An epoxy composite contained the BN surface modified with PSZ and APTES had the highest thermal conductivity of 11.8 W m−1 K−1 at a filler fraction of 75 wt%. Its thermal conductivity was 62 times higher than that of the neat epoxy.

KW - Polymer-matrix composites (PMCs)

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KW - Thermal conductivity

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Enhanced thermal conductivity of a polysilazane-coated A-BN/epoxy composite following surface treatment with silane coupling agents

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