Molecular dynamics simulation of the thermal conductivity of graphitized graphene/polyimide films

Publication date: June 2018Source: New Carbon Materials, Volume 33, Issue 3Author(s): Jing-cheng Xu, Si-chang Dai, Hao-liang Li, Jun-he YangAbstractGraphitized polyimide strips act as bridges between graphene nanoribbons to form macro-scale graphitized graphene/polyimide films. The effect of the sizes of the two components was investigated by non-equilibrium molecular dynamics simulation using the optimized Tersoff molecular force field. Results indicate that the thermal conductivity of the graphene nanoribbon increases almost linearly with length for lengths below 800 nm, but increases as a power function and converges to about 4300 W/(mK) above this. The heat conduction between graphene ribbons in the graphitized graphene/polyimide films is improved by increasing the number or width of the graphitized polyimide strips, but is lowered by increasing their length.

Source: New Carbon Materials - July 25, 2018 Category: Chemistry Source Type: research