期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 64, 期 -, 页码 79-89出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2014.04.023
关键词
Polymer-matrix composites (PMCs); Mechanical properties; Microstructures; Surface treatments
资金
- National Natural Science Foundation of China [51203038]
- Starting Scholar Foundation of Hangzhou Normal University [2012QDL022]
- International Science and Technology Cooperation Foundation of Zhejiang Province [2013C24020]
In this work, the effects of as-produced GO and silane functionalized GO (silane-f-GO) loading and silane functionalization on the mechanical properties of epoxy composites are investigated and compared. Such silane functionalization containing epoxy ended-groups is found to effectively improve the compatibility between the silane-f-GO and the epoxy matrix. Increased storage modulus, glass transition temperature, thermal stability, tensile and flexural properties and fracture toughness of epoxy composites filled with the silane-f-GO sheets are observed compared with those of the neat epoxy and GO/epoxy composites. These findings confirm the improved dispersion and interfacial interaction in the composites arising from covalent bonds between the silane-f-GO and the epoxy matrix. Moreover, several possible fracture mechanisms, i.e. crack pinning/deflection, crack bridging, and matrix plastic deformation initiated by the debonding/delamination of GO sheets, were identified and evaluated. (C) 2014 Elsevier Ltd. All rights reserved.
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