Caradonna Andrea, Badini Claudio, Padovano Elisa, Veca Antonino, De Meo Enea, Pietroluongo Mario
Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.
CRF, Centro Ricerche FIAT, Strada Torino 50, Orbassano, 10043 Torino, Italy.
Micromachines (Basel). 2019 Jan 18;10(1):63. doi: 10.3390/mi10010063.
The effect of carbon nanotubes, graphene-like platelets, and another carbonaceous fillers of natural origin on the electrical conductivity of polymeric materials was studied. With the aim of keeping the filler content and the material cost as low as possible, the effect of laser surface treatments on the conductivity of polymer composites with filler load below the percolation threshold was also investigated. These treatments allowed processing in situ conductive tracks on the surface of insulating polymer-based materials. The importance of the kinds of fillers and matrices, and of the laser process parameters was studied. Carbon nanotubes were also used to obtain piezoresistive composites. The electrical response of these materials to a mechanical load was investigated in view of their exploitation for the production of pressure sensors and switches based on the piezoresistive effect. It was found that the piezoresistive behavior of composites with very low filler concentration can be improved with proper laser treatments.
研究了碳纳米管、类石墨烯薄片以及另一种天然来源的含碳填料对聚合材料导电性的影响。为了尽可能降低填料含量和材料成本，还研究了激光表面处理对填料负载低于渗流阈值的聚合物复合材料导电性的影响。这些处理能够在绝缘聚合物基材料表面原位加工导电轨道。研究了填料和基体种类以及激光工艺参数的重要性。碳纳米管也被用于制备压阻复合材料。鉴于这些材料基于压阻效应可用于生产压力传感器和开关，研究了它们对机械负载的电响应。结果发现，通过适当的激光处理可以改善填料浓度极低的复合材料的压阻行为。
