Journal
ENGINEERING WITH COMPUTERS
Volume 38, Issue SUPPL 1, Pages 243-253Publisher
SPRINGER
DOI: 10.1007/s00366-020-01153-1
Keywords
Carbon nanotubes (CNTs); Polymer nanocomposites; Contact number; Tunneling effect
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2020R1A2B5B02002203]
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This paper suggests an equation to calculate the average contact number of carbon nanotubes (CNTs) in CNT-reinforced polymer nanocomposites (PCNT) and explores the various parameters that affect the contact number. The results show that a dense interphase, a high fraction of networked CNTs, reedy and short CNTs, low CNT surface energy, high polymer surface energy, low tunneling distance, and small contact diameter increase the contact number and improve the conductivity.
The present paper suggests an equation for the average contact number of carbon nanotubes (CNTs) in CNT-reinforced polymer nanocomposites (PCNT) by two developed equations for electrical conductivity. Several novel parameters in PCNT such as CNT size, CNT concentration, network fraction, interphase depth, tunneling effect, and CNT wettability by the polymer medium are considered to define the average contact number (m). m is calculated for some samples and the variation of m is explored over a range of parameters' values. The results show that dense interphase, high fraction of networked CNTs, reedy and short CNTs, low CNT surface energy, high polymer surface energy, low tunneling distance, and small contact diameter increase the m improving the conductivity. Moreover, tunneling distance and CNT contact diameter have the greatest effects on the m. The optimized level for m is necessary to control the nanocomposite's conductivity.
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