Journal
MATERIALS LETTERS
Volume 79, Issue -, Pages 96-99Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2012.03.111
Keywords
Carbon nanotubes; Polymeric composites; Electrical properties; Microstructure
Funding
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Dong Hua University [LK1006]
- NSF of China [51121001, 50925311, 20976112]
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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. (C) 2012 Elsevier B.V. All rights reserved.
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