American Society of Civil Engineers


Shape Memory Nanocomposite and Its Application


by Haibao Lu, (P.O Box 3011, Centre for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, P.R. China, E-mail: lybuwei1981@163.com), Jinsong Leng, A.M.ASCE, (P.O Box 3011, Centre for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, P.R. China), Dongxing Zhang, (School of Materials and Engineering, Harbin Institute of Technology, Harbin 150080, P.R. China), Yanju Liu, (School of Materials and Engineering, Harbin Institute of Technology, Harbin 150080, P.R. China), and Shanyi Du, (School of Materials and Engineering, Harbin Institute of Technology, Harbin 150080, P.R. China)
Section: Nano Technology Enabled Functional Materials, pp. 1-8, (doi:  http://dx.doi.org/10.1061/40988(323)182)

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Document type: Conference Proceeding Paper
Part of: Earth & Space 2008: Engineering, Science, Construction, and Operations in Challenging Environments
Abstract: This presentation covers the fabrication; characterization and potential application of electro activate shape memory polymer (SMP) containing multi-walled carbon nanotubes (MWCNTs), hybrid fillers of carbon black (CB) and short carbon fiber (SCF), and magnetic Ni power. The electrical conductivity of 8 wt% MWNTs composite is 1.25 x 10–2 S/cm with dimension of 8.0 cm x 2.0 cm x 0.2 cm rectangle sheet, it can be triggered by passing an electrical current with a constant voltage of 200 V. While, the electrical conductivity of the composite, containing 5 wt% CB and 2 wt% SCF, reaches to 3 S/cm. Their shape recovery can be induced by passing an electrical current of 25 V voltages. SMP filled with 10 vol% Ni, induced by 20 V. Then temperature-dependent resistivity test is done to investigate the thermo-sensitive effects in conducting polymer composite, and it shows a classical negative temperature coefficient (NTC) effect ranged from 70°C to 90°C. Thus smart thermal sensor using conducting SMP composite can be realized through resistivity change.


ASCE Subject Headings:
Composite materials
Fabrication
Nanotechnology
Smart materials