A theoretical study on the piezoresistive response of carbon nanotubes embedded in polymer nanocomposites in an elastic region

Title
A theoretical study on the piezoresistive response of carbon nanotubes embedded in polymer nanocomposites in an elastic region
Authors
유재상김재우양범주Hamid SouriHaemin Jeon유남호양철민
Keywords
Piezoresistive; Electrical conductivity; Multi-walled carbon nanotubes; Polymeric nanocomposite; Effective medium theory
Issue Date
2017-05
Publisher
Carbon
Citation
VOL 120-437
Abstract
Herein, we report a theoretical study of polymeric nanocomposites to provide physical insight into complex material systems in elastic regions. A self-consistent scheme is adopted to predict piezoresistive characteristics, and the effects of the interface and of tunneling on the effective piezoresistive and electrical properties of the nanocomposites are simulated. The overall piezoresistive sensitivity is predicted to be reduced when the lower interfacial resistivity of multi-walled carbon nanotubes (MWCNTs) and the higher effective stiffness of nanocomposites are considered. In addition, thin film nanocomposites with various MWCNT weight percentages are manufactured and their electrical performance capabilities are measured to verify the predictive capability of the present simulation. From experimental tests, the nanocomposites show clear piezoresistive behaviors, exhibiting a percolation threshold at less than 0.5 wt% of the MWCNTs. Three sets of comparisons between the experimental data and the present predictions are conducted within an elastic range, and the resulting good correlations between them demonstrate the predictive capability of the present model.
URI
http://pubs.kist.re.kr/handle/201004/66631
ISSN
0008-6223
Appears in Collections:
KIST Publication > Article
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