期刊
JOURNAL OF COMPOSITE MATERIALS
卷 51, 期 2, 页码 171-178出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/0021998316644846
关键词
Effective electrical conductivity; chain-structured ferromagnetic particles; carbon nanotubes; polymer composites; strain sensing; anisotropy
资金
- National Science Foundation [CMMI 1301288]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1301288] Funding Source: National Science Foundation
The effective electrical conductivity of multi-walled carbon nanotube/polydimethylsiloxane composites with chain-structured ferromagnetic particles has been investigated by experiments and micromechanics-based modeling. A multi-scale modeling approach is used to consider different size of fillers of multi-walled carbon nanotubes and particles as well as their distribution in the matrix. At nanoscale, for multi-walled carbon nanotube/polydimethylsiloxane composite, eight-chain model and influence of waviness of multi-walled carbon nanotube are considered to render an effective electrical conductivity. At microscale, ferromagnetic particles are aligned in the matrix made of the multi-walled carbon nanotube/polydimethylsiloxane composite, and an analytical model is established based on representative volume element. The influence of inter-particle distance is evaluated. The proposed analytic results agree well with the experimental results. The present model can be a useful tool for design and analysis of these composites for sensing applications considering their percolation threshold and overall electrical conductivity.
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