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

64 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

Access to Document

10.1016/j.apsusc.2020.147091

Cite this

@article{7d7c4931ad40463b8782b5e973eb0822,

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.",

keywords = "Polymer-matrix composites (PMCs), Surface modification, Thermal conductivity",

author = "Jaehyun Wie and Myeongjin Kim and Jooheon Kim",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = nov,

day = "1",

doi = "10.1016/j.apsusc.2020.147091",

language = "English",

volume = "529",

journal = "Applied Surface Science",

issn = "0169-4332",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Enhanced thermal conductivity of a polysilazane-coated A-BN/epoxy composite following surface treatment with silane coupling agents

AU - Wie, Jaehyun

AU - Kim, Myeongjin

AU - Kim, Jooheon

PY - 2020/11/1

Y1 - 2020/11/1

N2 - 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.

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)

KW - Surface modification

KW - Thermal conductivity

UR - https://www.scopus.com/pages/publications/85087397721

U2 - 10.1016/j.apsusc.2020.147091

DO - 10.1016/j.apsusc.2020.147091

M3 - Article

AN - SCOPUS:85087397721

SN - 0169-4332

VL - 529

JO - Applied Surface Science

JF - Applied Surface Science

M1 - 147091

ER -

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

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this