Dispersion Stability of Liquid crystalline-Functionalized Carbon Nanotubes in Nematic Liquid Crystals
- Dispersion Stability of Liquid crystalline-Functionalized Carbon Nanotubes in Nematic Liquid Crystals
- 고문주; 이선영; 유혜진; 유남호; 구본철; 조재환
- carbon nanotube; liquid crystal
- Issue Date
- We demonstrated that liquid crystal (LC) functionalized
multi-walled carbon nanotubes (MWNT-LC) by substituting
phenylcyclohexyl (PCH) mesogenic moieties into MWNT
surface through covalent linkage can be dispersed in
thermotropic host N-LC. Furthermore, the host N-LC showed
a good miscibility when the MWNT-LC was added up to 5
wt%. This is due to a substantial affinity between the LC
moieties on MWNT and the host N-LC molecules. By virtue
of good miscibility of MWNT-LC, we could align the
MWNT-LC by application of magnetic field. Actually, the
dichroic ratio of D-band and G-band were calculated as 3.6.
The order parameter of 0.46 for the G-band peak at 1580 cm-1
was calculated. We can thus conclude that our CNT order
parameter of 0.46 is similar to the order parameter of host NLC,
S = 0.55. It is expected that the liquid crystalline
functionalized carbon materials might be feasible for obtaining
a higher degree of orientational order structures.
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