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Open AccessArticle

Effect of Dispersion by Three-Roll Milling on Electrical Properties and Filler Length of Carbon Nanotube Composites

1
Department of Mechanical Engineering, Soongsil University, 369 Sangdo-ro, Dongjak-gu, Seoul 06978, Korea
2
Department of Mechanical Engineering, Inha University, Inha-ro 100, Michuhol-gu, Incheon 22212, Korea
*
Authors to whom correspondence should be addressed.
Materials 2019, 12(23), 3823; https://doi.org/10.3390/ma12233823
Received: 9 October 2019 / Revised: 11 November 2019 / Accepted: 12 November 2019 / Published: 21 November 2019
(This article belongs to the Special Issue Advanced Materials for Energy and Environmental Applications)
For practical use of carbon nanotube (CNT) composites, especially in electronic applications, uniform dispersion of a high concentration of CNTs in a polymer matrix is a critical challenge. Three-roll milling is one of most reliable dispersion techniques. We investigate the effect of three-roll milling time on CNT length and the electrical properties of a CNT/polydimethylsiloxane composite film with 10 wt% CNTs. During the milling process, the CNT length is decreased from 10 to 1–4 μm by mechanical shear forces. The electrical conductivity increases after 1.5 min of milling owing to dispersion of the CNTs but decreases with increasing milling time owing to the decrease in the CNT length. Considering the changes in the electrical conductivity of the CNT composite and CNT length, we determined how to optimize the three-roll milling time to obtain a suitable dispersion state. View Full-Text
Keywords: carbon nanotube; composite; three-roll milling; CNT dispersion; filler length variation carbon nanotube; composite; three-roll milling; CNT dispersion; filler length variation
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MDPI and ACS Style

Ha, J.-H.; Lee, S.-E.; Park, S.-H. Effect of Dispersion by Three-Roll Milling on Electrical Properties and Filler Length of Carbon Nanotube Composites. Materials 2019, 12, 3823.

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