Thermally Conductive,Healable Glass Fiber Cloth Reinforced Polymer Composite based on β-Hydroxyester Bonds Crosslinked Epoxy with Improved Heat Resistance

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外文摘要：To simultaneously endow thermal conductivity,high glass transition temperature(Tg)and healing capability to glass fiber/epoxy(GFREP)composite,dynamic crosslinked epoxy resin bearing reversible β-hydroxyl ester bonds was reinforced with boron nitride nanosheets modified glass fiber cloth(GFC@BNNSs).The in-plane heat conduction paths were constructed by electrostatic self-assembly of polyacrylic acid treated GFC and polyethyleneimine decorated BNNSs.Then,the GFC@BNNSs were impregnated with the mixture of lower concentration(3-glycidyloxypropyl)trimethoxysilane grafted BN micron sheets,3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate and hexahydro-4-methylphthalic anhydride,which accounted for establishing the through-plane heat transport pathways and avoiding serious deterioration of mechanical performances.The resultant GFREP composite containing less boron nitride particles(17.6 wt％)exhibited superior in-plane(3.29 W·m-1·K-1)and through-plane(1.16 W·m-1·K-1)thermal conductivities,as well as high Tg of 204 ℃(Tg of the unfilled epoxy=177 ℃).The re-versible transesterification reaction enabled closure of interlaminar cracks within the composite,achieving decent healing efficiencies estimated by means of tensile strength(71.2％),electrical breakdown strength(83.6％)and thermal conductivity(69.1％).The present work overcame the disadvantages of conventional thermally conductive composites,and provided an efficient approach to prolong the life span of thermally con-ductive GFREP laminate for high-temperature resistant integrated circuit application.

外文关键词：

Thermally conductive compositesBoron nitrideHigh-temperature resistanceβ-Hydroxyl ester bondHealing

作者：

Fang Chen、Xiao-Yan Pang、Ze-Ping Zhang、Min-Zhi Rong、Ming-Qiu Zhang

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作者单位：

Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education,GD HPPC Lab,IGCME,School of Chemistry,Sun Yat-sen University,Guangzhou 510275,China

Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center,Jieyang 515200,China

基金：

国家自然科学基金国家自然科学基金国家自然科学基金Natural Science Foundation of Guangdong Province,ChinaNatural Science Foundation of Guangdong Province,China广东省自然科学基金广州市科技计划GBRCE for Functional Molecular EngineeringFundamental Research Funds for the Central Universities,Sun Yatsen University

项目编号：

5203301151973237523730952019B15151200382021A15150104172020B01017900120220101156823yxqntd002

出版年：

2024

DOI：

10.1007/s10118-024-3076-x

高分子科学(英文版)

中国化学会　中国科学院化学研究所

高分子科学(英文版)

CSTPCD

影响因子：0.721

ISSN：0256-7679

年,卷(期)：2024.42(5)