| 초록 |
Polymer fibers is unstable due to their large surface-to-volume ratio. Recent experiments revealed that the addition of nanoparticles (NPs) to the polymer fiber might help control the stability of fiber. However, it remains elusive how the NPs would affect the stability of fibers. In this work, we perform MD simulations for polymer fibers with NPs of different types of interactions. We find that the disruption of unstable fibers is hindered by NPs and the time (τb) taken for the fiber to disrupt is increased. This indicates that the free energy barrier would be increased due to NPs. The mechanism for the stability differs for NPs of different interactions. When the interaction between polymers and NPs is attractive (repulsive), NPs are located at the center (surface) of the fiber such that τb is increased. When NPs are likely to be located at the surface of fibers, τb increases with an increase in temperature, which implies the entropy loss at the free energy barrier. |
