Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 3, Issue 7, Pages 2204-2208Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am200558f
Keywords
carbon nanotube; electrical conductivity; composite; Diels-Alder reaction; poly(vinylidene fluoride)
Funding
- National Science Council, Taiwan [NSC 99-2221-E-033-007-MY3, NSC-99-2622-E-033-008-CC3]
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We report a thermally-induced increase of electrical conductivity of polymer/multiwalled carbon nanotube (MWCNT) composites using Diels-Alder-adduct-modified MWCNTs as additives. Thermal treatments of the composites induce the defunctionalization of the modified MWCNTs through retro-DA reaction, consequently to recover the electrical conductivity of MWCNTs and to increase the conductivity of PVDF/MWCNT composites. For the composites possessing 0.5 wt % of MWCNTs, thermal treatment increases the electrical conductivity from 2 x 10(-12) S cm(-1) to 4 x 10(-8) S cm(-1) and significantly reduces the value of percolation threshold. Meanwhile, the thermal treatment does not alter the mechanical properties of the composites.
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