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Proceedings Paper

Improving the electrical conductivity by forming Ni powder chains in a shape-memory polymer filled with carbon black
Author(s): Xin Lan; Wei Min Huang; Na Liu; Sy Phee; Jin Song Leng; Shan Yi Du
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Paper Abstract

We demonstrate a simple approach to significantly reduce the electrical resistivity of thermo-responsive shape-memory polymers (SMPs), so that they can be easily triggered for shape recovery by Joule heating at a low electrical voltage. After adding a small amount of Ni micro particles into a polyurethane SMP filled with carbon black (CB), the electrical resistivity is slightly reduced. However, if these Ni particles are aligned into chains (by applying a low magnetic field on SMP/CB/Ni solution and then drying to fix the conductive chains), the drop of electrical resistivity is significant. This kind of SMP composites is suitable for cyclic operation as only micro/nano particles are used. A sample (40×15×1mm) with 10vol% of CB and 0.5vol% of chained Ni can be heated to 80°C for shape recovery at 30 V (1.2 W) of power. This approach is generic and applicable for producing other conductive polymers.

Paper Details

Date Published: 15 April 2008
PDF: 8 pages
Proc. SPIE 6927, Electroactive Polymer Actuators and Devices (EAPAD) 2008, 692717 (15 April 2008); doi: 10.1117/12.776546
Show Author Affiliations
Xin Lan, Harbin Institute of Technology (China)
Wei Min Huang, Nanyang Technological Univ. (Singapore)
Na Liu, Nanyang Technological Univ. (Singapore)
Sy Phee, Nanyang Technological Univ. (Singapore)
Jin Song Leng, Harbin Institute of Technology (China)
Shan Yi Du, Harbin Institute of Technology (China)

Published in SPIE Proceedings Vol. 6927:
Electroactive Polymer Actuators and Devices (EAPAD) 2008
Yoseph Bar-Cohen, Editor(s)

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