Effect of elastic modulus mismatch of epoxy/titanium dioxide coated silver nanowire composites on the performance of thermal conductivity

Yunliang Jiang; Maoyuan Li; Chao Chen; Zhigang Xue; Xiaolin Xie; Xingping Zhou; Yiu Wing Mai

doi:10.1016/j.compscitech.2018.06.028

Effect of elastic modulus mismatch of epoxy/titanium dioxide coated silver nanowire composites on the performance of thermal conductivity

Yunliang Jiang, Maoyuan Li, Chao Chen, Zhigang Xue, Xiaolin Xie, Xingping Zhou, Yiu Wing Mai

Research output: Journal article publication › Journal article › Academic research › peer-review

45 Citations (Scopus)

Abstract

The effect of elastic modulus mismatch of epoxy/silver nanowires (epoxy/AgNWs) composites on thermal conductivity was critically evaluated by synthesizing a stiff titanium dioxide (TiO₂) coating on the surface of AgNWs (designated as AgNWs@TiO₂) with different length/diameter aspect ratio. Compared to epoxy/AgNWs composites, AgNWs@TiO₂ could be more uniformly dispersed in epoxy matrix. However, the TiO₂ intermediate layer with a higher elastic modulus increased the modulus mismatch with epoxy, exacerbating the interfacial phonon scattering, and the thermal conductivity of the epoxy/AgNWs@TiO₂ composites was decreased. Moreover, the epoxy/AgNWs@TiO₂ composites possessed enhanced volume electrical resistivity and reduced dielectric properties relative to the epoxy/AgNWs composites. These observed results on thermal conductivity, electrical insulation, dielectric loss and dielectric constant due to TiO₂-coated AgNWs are more prominently displayed at higher nanowire loading (4 vol%) and aspect ratio (1000).

Original language	English
Pages (from-to)	206-213
Number of pages	8
Journal	Composites Science and Technology
Volume	165
DOIs	https://doi.org/10.1016/j.compscitech.2018.06.028
Publication status	Published - 8 Sept 2018
Externally published	Yes

Keywords

A. Epoxy composites
B. Thermal properties
C. Titanium dioxide
D. Modulus mismatch
E. Silver nanowires

ASJC Scopus subject areas

Ceramics and Composites
General Engineering

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10.1016/j.compscitech.2018.06.028

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title = "Effect of elastic modulus mismatch of epoxy/titanium dioxide coated silver nanowire composites on the performance of thermal conductivity",

abstract = "The effect of elastic modulus mismatch of epoxy/silver nanowires (epoxy/AgNWs) composites on thermal conductivity was critically evaluated by synthesizing a stiff titanium dioxide (TiO2) coating on the surface of AgNWs (designated as AgNWs@TiO2) with different length/diameter aspect ratio. Compared to epoxy/AgNWs composites, AgNWs@TiO2 could be more uniformly dispersed in epoxy matrix. However, the TiO2 intermediate layer with a higher elastic modulus increased the modulus mismatch with epoxy, exacerbating the interfacial phonon scattering, and the thermal conductivity of the epoxy/AgNWs@TiO2 composites was decreased. Moreover, the epoxy/AgNWs@TiO2 composites possessed enhanced volume electrical resistivity and reduced dielectric properties relative to the epoxy/AgNWs composites. These observed results on thermal conductivity, electrical insulation, dielectric loss and dielectric constant due to TiO2-coated AgNWs are more prominently displayed at higher nanowire loading (4 vol%) and aspect ratio (1000).",

keywords = "A. Epoxy composites, B. Thermal properties, C. Titanium dioxide, D. Modulus mismatch, E. Silver nanowires",

author = "Yunliang Jiang and Maoyuan Li and Chao Chen and Zhigang Xue and Xiaolin Xie and Xingping Zhou and Mai, {Yiu Wing}",

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TY - JOUR

T1 - Effect of elastic modulus mismatch of epoxy/titanium dioxide coated silver nanowire composites on the performance of thermal conductivity

AU - Jiang, Yunliang

AU - Li, Maoyuan

AU - Chen, Chao

AU - Xue, Zhigang

AU - Xie, Xiaolin

AU - Zhou, Xingping

AU - Mai, Yiu Wing

PY - 2018/9/8

Y1 - 2018/9/8

N2 - The effect of elastic modulus mismatch of epoxy/silver nanowires (epoxy/AgNWs) composites on thermal conductivity was critically evaluated by synthesizing a stiff titanium dioxide (TiO2) coating on the surface of AgNWs (designated as AgNWs@TiO2) with different length/diameter aspect ratio. Compared to epoxy/AgNWs composites, AgNWs@TiO2 could be more uniformly dispersed in epoxy matrix. However, the TiO2 intermediate layer with a higher elastic modulus increased the modulus mismatch with epoxy, exacerbating the interfacial phonon scattering, and the thermal conductivity of the epoxy/AgNWs@TiO2 composites was decreased. Moreover, the epoxy/AgNWs@TiO2 composites possessed enhanced volume electrical resistivity and reduced dielectric properties relative to the epoxy/AgNWs composites. These observed results on thermal conductivity, electrical insulation, dielectric loss and dielectric constant due to TiO2-coated AgNWs are more prominently displayed at higher nanowire loading (4 vol%) and aspect ratio (1000).

AB - The effect of elastic modulus mismatch of epoxy/silver nanowires (epoxy/AgNWs) composites on thermal conductivity was critically evaluated by synthesizing a stiff titanium dioxide (TiO2) coating on the surface of AgNWs (designated as AgNWs@TiO2) with different length/diameter aspect ratio. Compared to epoxy/AgNWs composites, AgNWs@TiO2 could be more uniformly dispersed in epoxy matrix. However, the TiO2 intermediate layer with a higher elastic modulus increased the modulus mismatch with epoxy, exacerbating the interfacial phonon scattering, and the thermal conductivity of the epoxy/AgNWs@TiO2 composites was decreased. Moreover, the epoxy/AgNWs@TiO2 composites possessed enhanced volume electrical resistivity and reduced dielectric properties relative to the epoxy/AgNWs composites. These observed results on thermal conductivity, electrical insulation, dielectric loss and dielectric constant due to TiO2-coated AgNWs are more prominently displayed at higher nanowire loading (4 vol%) and aspect ratio (1000).

KW - A. Epoxy composites

KW - B. Thermal properties

KW - C. Titanium dioxide

KW - D. Modulus mismatch

KW - E. Silver nanowires

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U2 - 10.1016/j.compscitech.2018.06.028

DO - 10.1016/j.compscitech.2018.06.028

M3 - Journal article

AN - SCOPUS:85049450042

SN - 0266-3538

VL - 165

SP - 206

EP - 213

JO - Composites Science and Technology

JF - Composites Science and Technology

ER -

Effect of elastic modulus mismatch of epoxy/titanium dioxide coated silver nanowire composites on the performance of thermal conductivity

Abstract

Keywords

ASJC Scopus subject areas

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