Fabrication and Characterization of Carbon Nanotube/Cellulose Composite Paper

Abstract

Carbon nanotube (CNT)/cellulose composite materials were fabricated in a papermaking process optimized to form a CNT network on cellulose fibers. The measured electrical conductivity ranged from 0.05 to 671 S/m for a CNT content of 0.5–16.7 wt%, which was higher than that for other polymer composites. The measured temperature dependences of electrical conductivity were described with the fluctuation-induced tunneling model. The real permittivities were the highest in the microwave region. The unique CNT network structure is thought to be the reason for the high conductivity and permittivity values. Our CNT/cellulose composite material exhibited improved parameters without any decrease in mechanical strength, compared to other carbon materials. The near-field electromagnetic shielding effectiveness (EMI SE) measured using a microstrip line method depended on the sheet conductivity and qualitatively matched the results of electromagnetic field simulations using a finite-difference time-domain simulator. A high near-field EMI SE of 50 dB was achieved in the 5–10-GHz frequency region with 4.8-wt% composite paper. The far-field EMI SE was measured using a free-space method. Fairly good agreement was obtained between the measured and calculated results. Approximately 10-wt% CNT is required to achieve composite paper with 20-dB far-field EMI SE.

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Title
Fabrication and Characterization of Carbon Nanotube/Cellulose Composite Paper
Book Title
Handbook of Polymer Nanocomposites. Processing, Performance and Application
Book DOI
10.1007/978-3-642-45229-1
Chapter DOI
10.1007/978-3-642-45229-1_38
Part of
Volume
Editors
  • Kamal K. Kar Send Email (1)
  • Jitendra K. Pandey Send Email (2)
  • Sravendra Rana Send Email (3)
  • Editor Affiliation
  • 1 Department of Mechanical Engineering and Materials Science Programme, Indian Institute of Technology Kanpur, Kanpur, India
  • 2 University of Petroleum and Energy Studies (UPES), Dehradun, India
  • 3 School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
  • Authors
  • Eiichi Sano Send Email (4)
  • Tomo Tanaka Send Email (4)
  • Masanori Imai Send Email (5)
  • Author Affiliation
  • 4 Research Center for Integrated Quantum Electronics, Hokkaido University, Sapporo, Hokkaido, 060-8628, Japan
  • 5 Fundamental Laboratory, Technical Research Div, Tokushu Tokai Paper, Nagaizumi, Shizuoka, 411-8750, Japan
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