Strong,tough,and thermally conductive nacre-inspired boron nitride nanosheet/epoxy layered nanocomposites

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外文摘要：Thermally conductive polymer nanocomposites integrated with lightweight,excellent flexural strength,and high fracture toughness(Kic)would be of great use in many fields.However,achieving all of these properties simultaneously remains a great challenge.Inspired by natural nacre,here we demonstrate a lightweight,strong,tough,and thermally conductive boron nitride nanosheet/epoxy layered(BNNEL)nanocomposite.Because of the layered structure and enhancing the interfacial interactions through hydrogen bonding and Si-O-B covalent bonding,the resulting nacre-inspired BNNEL nanocomposites show high fracture toughness of～4.22 MPa·m1/2,which is 7 folds as high as pure epoxy.Moreover,the BNNEL nanocomposites demonstrate sufficient flexural strength(～168.90 MPa,comparable to epoxy resin),while also being lightweight(～1.23 g/cm3).Additionally,the BNNEL nanocomposites display a thermal conductivity(K)of～0.47 W/(m·K)at low boron nitride nanosheet loading of 2.08 vol.％,which is 2.7 times higher than that of pure epoxy resin.The developed nacre-inspired strategy of layered structure design and interfacial enhancement provides an avenue for fabricating high mechanical properties and thermally conductive polymer nanocomposites.

外文关键词：

nacre-inspirationnanocompositesflexural strengthfracture toughness(Klc)thermal conductivity

作者：

Huagao Wang、Rongjian Lu、Lei Li、Cheng Liang、Jia Yan、Rui Liang、Guoxing Sun、Lei Jiang、Qunfeng Cheng

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作者单位：

School of Chemistry,Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education,Beihang University,Beijing 100191,China

School of Chemistry and Materials Science,University of Science and Technology of China,Hefei 230026,China

Suzhou Institute for Advanced Research,University of Science and Technology of China,Suzhou 215123,China

Department of Stomatology,Fifth Medical Center,Chinese PLA General Hospital,Beijing 100039,China

Department of Engineering Science,Faculty of Innovation Engineering,Macau University of Science and Technology,Avenida Wai Long,Taipa,Macau 999078 China

Joint Key Laboratory of the Ministry of Education,Institute of Applied Physics and Materials Engineering,University of Macau,Avenida da Universidade,Taipa,Macau 999078,China

Institute of Energy Materials Science (IEMS),University of Shanghai for Science and Technology,Shanghai 200093,China

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基金：

National Key Research and Development Program of ChinaNational Science Fund for Distinguished Young ScholarsNational Natural Science Foundation of China111 Project

项目编号：

2021YFA07157005212530222075009B14009

出版年：

2024

DOI：

10.1007/s12274-023-6101-4

纳米研究(英文版)

CSTPCD

ISSN：

年,卷(期)：2024.17(2)

参考文献量57