• Anisotropic properties of aligned SWNT modified poly (methyl methacrylate) nanocomposites

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      https://www.ias.ac.in/article/fulltext/boms/029/03/0313-0316

    • Keywords

       

      Single-walled carbon nanotube; poly methyl methacrylate; nanocomposite; anisotropic property.

    • Abstract

       

      The poly (methyl methacrylate) (PMMA)/single-walled carbon nanotube (SWNT) composites with good uniformity, dispersion and alignment of SWNT were fabricated in an improved figuration process. The semidried mixture was stretched along one direction at a drawing ratio of 50 before it was dried, and then folded along the same direction stretching repeatedly for 100 times. The transmission electron microscopic (TEM) observation demonstrated that SWNT in the PMMA/SWNT composite tends to align in the stretching direction owing to a torque exerting on it in the stretching process. The electrical and mechanical properties of PMMA/SWNT composite were studied as a function of SWNT orientation and concentration. The aligned SWNT modified PMMA/SWNT composite presented highly anisotropic properties. The experimental results showed that the electrical conductivity and mechanical properties of composite rise with the increase of SWNT concentration, and that composite films showed higher conductivity and higher mechanical draw ratios along the stretched direction than perpendicular to it. The thermogravimetric analysis (TGA) revealed that embedding the SWNTs into the PMMA matrix also improves the thermal stability of the composite.

    • Author Affiliations

       

      Weixue Li1 Qing Wang1 Jianfeng Dai2

      1. Department of Physics, Lanzhou University of Technology, Lanzhou 730050, P R China
      2. State Key Laboratory of New Nonferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, P R China
    • Dates

       
  • Bulletin of Materials Science | News

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