Journal
NANO ENERGY
Volume 17, Issue -, Pages 1-9Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2015.07.023
Keywords
Self-healing; High dielectric permittivity; Percolation simulation; Recoverable motion sensor; Diets-Alder reaction
Categories
Funding
- 973 Program [2012CB821404]
- National Natural Science Foundation of China [51172166, 61106005, 61371016]
- National Science Fund for Talent Training in Basic Science [J1210061]
- Doctoral Programme Foundation [20130141110054]
- Fundamental Research Funds for the Central Universities [2012202020201]
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The recoverable motion sensor with high sensitivity was made based on flexible self-healing nanocomposites. The preparation of these nanocomposites involved incorporating surface-modified CaCu3Ti4O12 (S-CCTO) nanoparticles in self-healing polymer matrix based on dynamic Diels-Alder (DA) adducts. The dependences of electric and dielectric properties of the resultant composites on volume fractions of filler and frequency were investigated. It is found that composites present a high dielectric permittivity of 93 at 100 Hz with 17 vol% filler, approximately 36 times higher than that of pure film. These results agree well with the percolation theory. Furthermore, the hybrid film recovers its capacitance well following a cut and the self-healing process based on DA and retro-DA (r-DA) reaction. We herein show that a polymer matrix based on dynamic DA adducts can be used to make self-healing high-K polymer nanocomposites and recoverable motion sensors. This work may lead to new opportunities for the design and fabrication of various next-generation wearable sensor devices. (C) 2015 Elsevier Ltd. All rights reserved.
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