Effect of Filler Morphology on the Electrical and Thermal Conductivity of PP/Carbon-Based Nanocomposites

Journal of Composites Science

Luigi Torre¹  Alberto Frache²  Ilaria Armentano³  Marco Monti⁴  Marta Zaccone⁴ 

[1] Civil and Environmental Engineering Department, University of Perugia, UdR INSTM, Strada di Pentima 4, 05100 Terni, Italy;Department of Applied Science and Technology, Polytechnic of Turin, INSTM Research Unit, Viale Teresa Michel 5, 15121 Alessandria, Italy;Department of Economics, Engineering, Society and Business Organization (DEIM), University of Tuscia, Largo dell’Università snc, 01100 Viterbo, Italy;Proplast, Via Roberto di Ferro 86, 15122 Alessandria, Italy;

关键词: carbon nanostructures;    polymer nanocomposites;    dielectric properties;    electrical properties;    thermal conductivity;   

DOI  :  10.3390/jcs5080196

来源: DOAJ

【 摘 要 】

In this paper, we studied the effect of different carbon-based nanostructures on the electrical and mechanical properties of polypropylene (PP) nanocomposites. Multi-walled carbon nanotubes (MWCNT), expanded graphite (EG), and two different carbon black nanoparticles (CB) have been dispersed at several weight contents in the polymer matrix through a melt extrusion process. The produced nanocomposites have been used to obtain samples for the characterization by injection molding. The dispersion of the nanoparticles in the matrix has been evaluated by scanning electron microscopy (SEM) analysis. The electrical characterization has been performed both in DC and in AC configuration. The mechanical properties have been evaluated with both tensile test and impact strength (Izod). The thermal conductivity has been also evaluated. As a result, MWCNTs are the nanoadditive with the lowest electrical percolation threshold. This allows MWCNT nanocomposite to drastically change the electrical behavior without a significant embrittlement observed with the other nanoadditives. However, CB with the lowest surface area allows the highest conductivity, even though at a high particle content. EG has a limited effect on electrical properties, but it is the only one with a significant effect on thermal conductivity.

【 授权许可】

Unknown