Issue 75, 2015

Percolation and resistivity-temperature behaviours of carbon nanotube-carbon black hybrid loaded ultrahigh molecular weight polyethylene composites with segregated structures

Abstract

An ultrahigh molecular weight polyethylene (UHMWPE) composite containing carbon nanotube–carbon black (CNT–CB) hybrid was fabricated via a facile method, i.e., mechanical mixing plus hot compaction in order to obtain low-cost conductive polymer composites with balanced electrical properties. Optical microscope and scanning electron microscope observations indicate the formation of a typical segregated structure in the CNT–CB/UHMWPE composite, with the CNT–CB hybrid selectively located at the interfaces of UHMWPE granules. Compared to the single CNT loaded UHMWPE composite, the CNT–CB/UHMWPE segregated composite with a quarter replacement of CNT with CB shows only 8% decline in electrical conductivity, with the same filler content of 4 wt%, realizing a significant reduction in the material cost. More interestingly, the CNT–CB/UHMWPE composite presents 273% higher positive temperature resistivity intensity than that of CNT/UHMWPE composites, exhibiting strong sensitivity to ambient temperature. Our work demonstrates a novel strategy to fabricate low-cost and high-performance conductive polymer composites by the combination of hybrid fillers and a segregated structure.

Graphical abstract: Percolation and resistivity-temperature behaviours of carbon nanotube-carbon black hybrid loaded ultrahigh molecular weight polyethylene composites with segregated structures

Article information

Article type
Paper
Submitted
12 May 2015
Accepted
07 Jul 2015
First published
08 Jul 2015

RSC Adv., 2015,5, 61318-61323

Percolation and resistivity-temperature behaviours of carbon nanotube-carbon black hybrid loaded ultrahigh molecular weight polyethylene composites with segregated structures

C. Cui, H. Pang, D. Yan, L. Jia, X. Jiang, J. Lei and Z. Li, RSC Adv., 2015, 5, 61318 DOI: 10.1039/C5RA08847J

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