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探讨了碳纤维(CF)表面镍金属的化学镀工艺,制备了镀镍碳纤维(NiCF),采用密炼工艺制备了ABS基体复合材料,研究了CF和NiCF含量对复合材料的导电性能及电磁屏蔽效能的影响。结果表明:采用化学镀的方法在碳纤维表面镀覆了金属镍,所形成的镀层均匀致密;镀覆时间为5min时,镀镍后的碳纤维电阻率降低两个数量级;复合材料电阻率随CF、NiCF含量的增加而逐渐减小;复合材料电磁屏蔽效能随CF、NiCF含量的增加而逐渐增加,当NiCF含量为25%(wt)(约13.3vol%)时,电磁屏蔽效能最高可达51dB。
The electroless plating process of nickel metal on carbon fiber (CF) surface was discussed. Nickel-plated carbon fiber (NiCF) was prepared. The ABS matrix composites were prepared by the mixing process. The effects of CF and NiCF content on the electrical conductivity and electromagnetic shielding effectiveness Impact. The results show that the electroless nickel plating on the surface of carbon fiber results in a uniform and dense coating. When the plating time is 5 min, the resistivity of the carbon fiber after nickel plating is reduced by two orders of magnitude. The resistivity of the composite increases with the increase of CF, NiCF content decreases gradually. The electromagnetic shielding effectiveness of the composites increases with the increase of the content of CF and NiCF. When the NiCF content is 25wt% (about 13.3vol%), the electromagnetic shielding effectiveness can reach up to 51dB.