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Journal Articles Composites Science and Technology Year : 2020

Durability sensor using low concentration carbon nano additives


In this paper, nanocomposite durability sensors were developed in order to detect the diffusion of chemicals in real-time. Polymer nanocomposite based sensors usually consist of conductive nano-additives such as CNT (carbon nanotube), graphene, carbon black, silver nanoparticles, etc. However, these nanocomposite sensors use a high content of nanomaterials to ensure good conductivity. In this study, a special approach for a chemical sensor with a low concentration (0.1 wt%-2 wt%) carbon nano-additive was carried out and tested in the 1[M] H3PO4 solution. Responding time and electrical resistance of each stage were analyzed against the nano-additives’ concentration. The sensing behavior is represented by the decrease of electrical resistance from 100 MΩ level to 100 Ω level. A numerical multi-stage model was developed to evaluate the formation of the conductive network and its sensing property. The modeling work shows two major parameters affect the sensing behavior: (1) The aspect ratio of conductive nano-additive. (2) Diffusion coefficient ratio of different ions in different phases.


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hal-02568811 , version 1 (10-05-2020)



Chang Liu, Kh Lafdi, Francisco Chinesta. Durability sensor using low concentration carbon nano additives. Composites Science and Technology, 2020, 195, pp.1-8. ⟨10.1016/j.compscitech.2020.108200⟩. ⟨hal-02568811⟩
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