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Experimental Study on Force Sensitivity of the Conductivity of Carbon Nanotubes-Modified Epoxy Resins

1
Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education, Southeast University, Nanjing 210096, China
2
Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China
3
Jiangsu Advanced Institute of Seismic Resistant Technology for Mechanical and Electrical Equipment, Xingzhuang Industrial Park, Lishui District, Nanjing 211200, China
*
Author to whom correspondence should be addressed.
Materials 2018, 11(7), 1174; https://doi.org/10.3390/ma11071174
Received: 4 May 2018 / Revised: 23 June 2018 / Accepted: 3 July 2018 / Published: 10 July 2018
The addition of a conductive material into polymer improves its mechanical properties, electrical properties and thermal conductivity and bestows it with good self-sensing and self-adjusting properties. In this study, carbon nanotubes-modified epoxy resins (CNTs-EP) were successfully prepared with good dispersion through the combined methods of three roller rolling, ultrasonic processing and adding surfactant. Tests were conducted to evaluate the resistivity of unloaded modified epoxy resins with different mixing amounts of carbon nanotubes (CNTs), to determine the conductive percolation threshold. On the basis of the test results, a series of monotonic and cyclic uniaxial tensile tests were then conducted to investigate the force sensitivity of the conductivity of epoxy resins modified with different mixing amounts of CNTs. The relationship between the stress and the resistivity under various mixing amounts was studied, indicating that the resistance response could play a good warning role on the damage of the modified polymer material. View Full-Text
Keywords: carbon nanotubes; epoxy resin; force sensitivity; mixing amount; resistivity carbon nanotubes; epoxy resin; force sensitivity; mixing amount; resistivity
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MDPI and ACS Style

Wan, C.-F.; Wen, B.; Dai, J.-G.; Liu, J.-X.; Liu, Y.-Z. Experimental Study on Force Sensitivity of the Conductivity of Carbon Nanotubes-Modified Epoxy Resins. Materials 2018, 11, 1174.

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