Microstructure of carbon nanotubes/PET conductive composites fibers and their properties |
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| Affiliation: | 1. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha, 410082, China;2. Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, 90095, USA;3. Division of Advanced Nano-Materials, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China;4. School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, NSW, 2006, Australia;1. Department of Mechanical Engineering, National University of Singapore, Singapore;2. School of Mechanical Engineering, Purdue University, USA;1. State Key Laboratory of Silicate Materials for Architectures (Wuhan University of Technology), Wuhan 430070, China;2. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China;3. School of Science, Wuhan University of Technology, Wuhan 430070, China;1. Department of Materials Science and Engineering, HEDPS/CAPT/LTCS, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Engineering, Peking University, Beijing 100871, China;2. School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Dr, Atlanta, GA 30332, USA |
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| Abstract: | Poly(ethylene terephthalate) (PET) resin has been compounded with carbon nanotubes (CNTs) using a twin-screw extruder. The composites of 4 wt% CNTs in PET had a volume electrical resistance of 103 Ω cm, which was 12 orders lower than pure PET. The volume electrical conductivity of CNTs/PET composites with different CNTs containing followed a percolation scaling law of the form σ = κ(ρ ? ρc)t well. Scanning electron microscopy (SEM) micrograph showed that CNTs had been well dispersed in PET matrix. Optical microscopy micrograph showed that discontinuity of conductive phase existed in some segments of composite fiber. Rheological behavior of CNTs/PET composites showed that the viscosity of CNTs/PET composites containing high nanotube loadings exhibited a large decrease with increasing shear frequency. Crystallization behavior of CNTs/PET composites was studied by differential scanning calorimetry (DSC) and the nucleating effect of CNTs in the cooling crystallization process of PET was confirmed. Composite fiber was prepared using the conductive CNTs/PET composites and pure PET resin by composite spinning process. Furthermore, cloth was woven by the composite fiber and common terylene with the ratio 1:3. The cloth had excellent anti-static electricity property and its charge surface density was only 0.25 μC/m2. |
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