Effect of Carbon Nanoparticles on Electrothermal-Mechanical Properties of Carbon Nanotubes Composites
WANG Xiaojun1,2, LIU Taiqi1
1 Institute of Aerospace Materials, Beijing Institute of Petrochemical Technology, Beijing 102617, China 2 College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
Abstract: Apolyurethane based carbon nanotubes electro-thermal coatings were prepared by using carbon nanotubes (CNT) and polyurethane water solution. Nano carbon black (CB) was used as a modifier to investigate the effects of different CB loading on electrothermal-mechanical properties. The results show that, the tensile strength and elongation-at-break of the electrothermal coating films without CB modification increase and the resistivity decrease with increasing the content of CNT, however, the coating shows no temperature increasing, even the CNT content reaches to 19% under the condition of 220 V. The electrothermal properties of the electrothermal coating film has been greatly increased after introducing CB into the composites with the CNT in a content of 10%. The analytical results show that CB and CNT dispersed well in the composites. The tensile strength of the electrothermal coating films increase and elongation-at-break decrease with increasing the content of CB. The coating with a content of 5% CB shows an obviously temperature increasing, and the temperature reaches to 87.8 ℃ with a content of 7% CB under the condition of 220 V.
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2020, Vol. 34 
