An approach to prepare uniform graphene oxide/aluminum composite powders by simple electrostatic interaction in water/alcohol solution |
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| Authors: | Wei SUN Rui ZHAO Tian WANG Ke ZHAN Zheng YANG Bin ZHAO Ya YAN |
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| Affiliation: | 1. School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China2. Shanghai Innovation Institute for Materials, Shanghai 200444, China3. School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China |
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| Abstract: | The homogenous dispersion of graphene in Al powders is a key challenge that limits the development of graphene-reinforced metal matrix composites with high performance. Here, uniform distribution of graphene oxide (GO) coated on flake Al powders were obtained by a simply stirring and ultrasonic treatment in the water/alcohol solution. The effect of water volume content on the formation of GO/Al composite powders was investigated. The results showed that GO adsorbed with synchronous reduction on the surface of Al powders, but when the water content was higher than 80% in the solution, Al powders were totally changed into Al(OH)3. With optimizing the water content of 60% in the solution, reduced GO was homogenously coated onto the surface of flake Al powders. The formation mechanism can be ascribed to the balance control between the liquid/solid interaction and the hydrolysis reaction. |
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| Keywords: | graphene Al powder composite morphology electrostatic interaction |
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