Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1646806 | Materials Letters | 2012 | 4 Pages |
This article reports a novel percolation mechanism in carbon nanotube (CNT)/polyethylene composites with combined segregated and double percolated structure, in which the CNTs form conductive networks in high-density polyethylene (HDPE) and the CNT/HDPE component forms continuous conductive layers at the interface between the ultrahigh-molecular-weight polyethylene granules. The combination of segregated and double percolated structures achieved an ultralow percolation of 0.049 vol. % CNT. Morphological studies and the determination of the critical exponent t value obtained from the classical threshold mechanism indicate the formation of a three-dimensional conductive network. This work provides a guideline for the easy fabrication of high performance CPCs with an ultralow percolation threshold.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights►Combination of segregated and double percolated network lowers the percolation. ►The conductive composites have a very low percolation (0.049 vol.%). ►The conductive composites form a three-dimensional conductive network.