Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (6): 1263.

• Articles • Previous Articles     Next Articles

Thermal and Electrical Conductivities of the Graphitized Carbon Nanotube/poly(methyl methacrylate) Composites Based on Weak Nanotube-polymer Interactions

ZENG You1*, ZHAO Long1,2, LIU Peng-Fei1,2, DU Jin-Hong2, LIU Chang2   

  1. 1. School of Materials Science and Engineering, Shenyang Jianzhu University, Shenyang 110168, China;
    2. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2009-09-15 Online:2010-06-10 Published:2010-06-10
  • Contact: ZENG You. E-mail: zengyou@sjzu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 90606008, 50703045)、辽宁省教育厅项目(批准号: 2008589)和辽宁省高校重点实验室开放基金资助.

Abstract:

Electrical and thermal conductivities of carbon nanotube(CNT)/polymer composites are greatly hindered by polymer-wrapping around CNTs due to high surface energy of CNTs. The graphitized multi-walled CNTs filled poly(methyl methacrylate)(PMMA) were investigated on the basis of surface physical chemistry and wetting thermodynamics. The electrical and thermal conductivities of the graphitized CNT/PMMA compo-sites were measured to evaluate enhancing effects of the graphitized CNTs. The graphitized CNT/PMMA composites exhibit high electrical conductivity and a low percolation threshold of is 0.8%(mass fraction), and the thermal conductivity of the composites with 3%(mass fraction) increases by 193% in comparison with that of the neat PMMA, which is due to the integrated microstructures of the graphitized CNTs, weak CNT-PMMA interactions, low contact resistance between CNTs, and efficient conducting CNT-networks. We suggest that high-performance composites can be designed and fabricated by fully considering the surface energy of components and the filler-polymer interactions.

Key words: Carbon nanotube; Weak interaction; Poly(methyl methacrylate); Composite; Thermal and electrical conductivity

TrendMD: