In:
The Journal of Chemical Physics, AIP Publishing, Vol. 128, No. 5 ( 2008-02-07)
Abstract:
Immiscible binary fluids containing rigid nanorods that are preferentially immersed in one of the two fluids are systematically investigated via dissipative particle dynamics simulations. For sufficiently high volume fraction and/or aspect ratio, nanorods lead to a pronounced slowing down of the phase separation process, and yield microphase-separated structures with a characteristic length scale that decreases as either the nanorods length or their volume fraction is increased. The slowing down of the dynamics is attributed to a disordered jamming of the nanorods in the preferred component and a dramatic reduction in their diffusion due to kinetic conformational hindrance. The final characteristic length scale of the dispersion, reduced by the nanorods length, is found to depend only on Onsager’s dimensionless parameter ψν, where ψ and ν are the nanorods volume fraction and aspect ratio, respectively. These results indicate that nanorods may be used as an effective emulsifying agent of binary polymer blends.
Type of Medium:
Online Resource
ISSN:
0021-9606
,
1089-7690
Language:
English
Publisher:
AIP Publishing
Publication Date:
2008
detail.hit.zdb_id:
3113-6
detail.hit.zdb_id:
1473050-9
