Electrical and shielding properties of ABS resin filled with nickel-coated carbon fibers
Electrical and shielding properties of ABS resin filled with nickel-coated carbon fibers
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DOI：
10.1016/0266-3538(95)00143-3
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发表时间：
1996-01-01
影响因子：
9.1
通讯作者：
Jiang, HC
中科院分区：
文献类型：
--
作者：
Lu, GG;Li, XT;Jiang, HC
对镀镍碳纤维及其复合材料的导电性和屏蔽效能进行了研究，给出了研究结果。采用连续电镀装置在碳纤维表面镀镍。镀镍碳纤维的电阻率随镀镍时间的增加而降低。采用溶剂法和Brabender混合法制备了涂镍碳纤维与ABS树脂的复合材料，复合材料的电阻率随纤维含量的增加而降低。在纤维含量相同的情况下，镀镍碳纤维填充复合材料的导电性远大于普通碳纤维填充复合材料。为了达到与碳纤维填充复合材料相同的电阻率，采用镀镍碳纤维作为填充材料可以大大降低所需纤维的体积分数。通过实验和理论计算得到了复合材料的屏蔽效能；在高频下，两者具有很好的一致性。经实验测试，填充体积分数为10%的镀镍碳纤维的ABS树脂的屏蔽效能约为50分贝。
Electrical conductivity and shielding effectiveness of nickel-coated carbon fibers and their composites have been studied and the results are presented in this paper. A continuous electroplating device was used to plate nickel over the surface of the carbon fibers. The resistivity of Ni-coated carbon fibers decreases with an increase in plating time. The optimum thickness of the coating is 0.2-0.5 mu m. A solvent method and Brabender mixing were used to prepare the composites of Ni-coated carbon fibers in ABS resin, the resistivity of which decreases with an increase in fiber content. At the same fiber content, the conductivity of the composites filled with Ni-coated carbon fibers is much greater than that of ordinary carbon-fiber-filled composites. To reach the same resistivity as carbon-fiber-filled composites, the use of Ni-coated carbon fibers as filler can greatly decrease the required volume fraction of fibers. The shielding effectiveness of the composites was obtained by experiment and by theoretical calculation; at high frequencies, the two correspond very well. From experimental measurement, the shielding effectiveness of ABS resin filled with 10 vol.% of Ni-coated carbon fibers is about 50 dB.