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The fabrication and electrical properties of carbon nanofibre-polystyrene composites

机译：碳纳米纤维-聚苯乙烯复合材料的制备和电性能

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Carbon nanofibre-polystyrene (PS) composites were fabricated by ultrasonic dispersion in a solution followed by spraying to cast films. These films were then hot-pressed to form thicker structures. Direct current conductivity measurement results show that the conductivity of the composite reaches 2.6 x 10~(-5) S m~(-1) at 3 wt percent carbon nanofibre loading, which is an increase of ten orders of magnitude over the pure PS matrix, indicating that the composite is electrically conductive at a very low nanofibre loading. The dielectric properties of carbon nanofibre-PS composites were investigated at room temperature within the Ku-band (frequency range: 12.4-18 GHz). The results reveal that the dielectric constants of the composites are slightly dependent on the frequency but increase rapidly with increasing carbon nanofibre loading in the composite. The experimental data show that the dielectric constant of carbon nanofibre-PS composite can reach more than 80 at a frequency of 15 GHz.
机译：碳纳米纤维-聚苯乙烯（PS）复合材料是通过在溶液中超声分散，然后喷涂成流延膜而制成的。然后将这些膜热压以形成较厚的结构。直流电导率测量结果表明，在碳纳米纤维含量为3 wt％时，复合材料的电导率达到2.6 x 10〜（-5）S m〜（-1），比纯PS基体增加了十个数量级。 ，表明该复合材料在非常低的纳米纤维负载下具有导电性。在室温下的Ku波段（频率范围：12.4-18 GHz）内研究了碳纳米纤维-PS复合材料的介电性能。结果表明，复合材料的介电常数略微取决于频率，但随着复合材料中碳纳米纤维负载的增加而迅速增加。实验数据表明，碳纳米纤维-PS复合材料的介电常数在15 GHz时可以达到80以上。

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