李桐

个人信息Personal Information

教授

博士生导师

硕士生导师

性别:男

毕业院校:昆士兰科技大学

学位:博士

所在单位:力学与航空航天学院

学科:固体力学. 计算力学. 航空航天力学与工程

办公地点:工程力学系511房间

联系方式:0411-84706036

电子邮箱:tong@dlut.edu.cn

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Engineering the mechanical properties of CNT/PEEK nanocomposites

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论文类型:期刊论文

发表时间:2019-01-01

发表刊物:RSC ADVANCES

收录刊物:EI、SCIE

卷号:9

期号:23

页面范围:12836-12845

ISSN号:2046-2069

摘要:Poly-ether-ether-ketone (PEEK) was deeply investigated as a composite matrix because of its outstanding mechanical properties and thermostability. However, the performance improvement of fiber-reinforced PEEK composites was moderate according to a great number of experimental investigations. An insightful understanding of the deformation and interfacial failure in the PEEK composite is needed to guide the future fabrication of high-performance PEEK plastics. In this paper, Molecular Dynamics (MD) simulation was employed to evaluate the mechanical properties of carbon nanotube (CNT) reinforced PEEK nanocomposites. It was found that the weak interface between CNTs and the PEEK matrix leads to the flaws in the CNT/PEEK nanocomposite. A CNT-functionalization strategy was used to introduce H-bonds between CNTs and the PEEK matrix, improving the overall mechanical performance of the CNT/PEEK nanocomposite. Numerical examples validate that the addition of amino groups on CNTs can significantly improve the interfacial failure shear stress and elastic modulus of the CNT/PEEK nanocomposites. This mechanism study provides evidence and a theoretical basis to improve the mechanical performance of fiber-reinforced PEEK for lightweight structures in advanced equipment.