期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 171, 期 -, 页码 44-53出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2018.12.010
关键词
Carbon nanotubes; Electrical properties; Modelling; Dispersion; SHM
资金
- Ministerio de Economia y Competitividad of Spanish Government [MAT2013-46695-C3-1-R]
- Comunidad de Madrid Government [P2013/MIT-2862]
This paper reports on an investigation of the critical parameters which determine the electrical and electromechanical properties of carbon nanotube (CNT) nanocomposites. For this purpose, a novel analytical model, based on the tunnelling mechanisms of CNTs, is proposed. Three dispersion parameters are introduced in the model to reflect the CNT aggregation state. Microscopy analysis and electrical and strain monitoring tests were carried out on CNT nanocomposites manufactured by toroidal stirring and three roll milling. It is observed that electrical conductivity is greatly affected by dispersion procedure as well as strain sensitivity, measured by the gauge factor (GF). Generally, well dispersed materials have higher conductivities and GF. In this regard, the aggregate ratio has a prevalent effect. Experimental data and theoretical predictions allow the correlation of dispersion parameters given by manufacturing procedures with electrical properties to develop highly sensitive nanocomposites. This demonstrates the potential and applicability of the proposed model.
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