Dispersion Stability of Liquid crystalline-Functionalized Carbon Nanotubes in Nematic Liquid Crystals

Title
Dispersion Stability of Liquid crystalline-Functionalized Carbon Nanotubes in Nematic Liquid Crystals
Authors
고문주이선영유혜진유남호구본철조재환
Keywords
carbon nanotube; liquid crystal
Issue Date
2012-06
Publisher
국제탄소학회
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/42676
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KIST Publication > Conference Paper
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