| 초록 |
The influence of the shear on the electrical conductivity of carbon nanotubes (CNTs) in CNT/polymer composites is studied using molecular simulations. It has been reported that the shear could decrease the electrical conductivity of CNT/polymer composites by several orders of magnitude. It remains, however, unanswered yet how the electrical conductivity decreased. In this work, we perform Monte Carlo simulations using a pseudo-potential to mimic a simple shear flow. When the CNT/polymer composite is exposed to the shear, CNTs are forced to align parallel to the shear direction. After a certain period of the shear imposition, however, CNTs become entangled and construct an aggregate. Once the aggregate forms, the percolation network of CNTs breaks down; thus decreasing the electrical conductivity significantly. |
