期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 181, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2019.107708
关键词
Particle-reinforced composite; Liquid metal; Oxides; Fracture toughness
资金
- Australian Research Council's Discovery Grant Program [DP140100778]
A liquid metal synthesis process provides a new low energy pathway avenue to manufacture various low-dimensional nanomaterials in order to improve the mechanical properties of polymer composites. This paper presents an investigation of the strengthening and toughening performances of two-dimensional platelets of boehmite (gamma-AlO(OH)) and alumina (gamma-Al2O3). Using a liquid metal alloy reaction process, two-dimensional metal oxide hydroxide and oxide platelets were synthesised and then used for reinforcing epoxy polymer composites at different weight fractions up to 10%. Both boehmite and alumina platelets increased the tensile modulus, yield stress and fracture toughness of the epoxy composite by up to 40%, 35% and 320%, respectively. Of the two materials, the boehmite platelets were more effective than the alumina platelets in increasing the tensile modulus (up to 27%) and ultimate strength (up to 14%) of the epoxy. In contrast, the alumina platelets promoted a 50% greater improvement to the mode I fracture energy when compared to using boehmite platelets. The primary mechanisms responsible for the measured property improvements are identified.
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