title: Carbon nanotubes incorporated within lyotropic hexagonal liquid crystal formed in room-temperature ionic liquids.
abstract: Multiwalled carbon nanotubes (MWCNTs) were evenly dispersed within hexagonal lyotropic liquid crystals (LLCs) formed in room-temperature ionic liquids (RTILs), ethylammonium nitrate (EAN). Characterization and tribological properties of dispersed system were studied in detail. Polarized optical microscopy images combined with small-angle X-ray scattering (SAXS) results indicate that the MWCNTs are well-dispersed and that the introduction of MWCNTs does not destroy the structure of hexagonal LLCs. The increase of d spacing demonstrates the integration of MWCNTs within the cylinders of the hexagonal LLCs. FT-IR and Raman spectra of the MWCNTs-LLC composites show the characteristic absorption peaks and Raman bands of MWCNTs. The tribological properties were explored to greatly extend the applications of MWCNTs-LLC composites in RTILs as lubricating materials. The rheological measurement results indicate that MWCNTs-LLC composites are highly viscoelastic and that the apparent viscosity is enhanced by the presence of the MWCNTs.
authors.affiliation: Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, China.
authors.forename: Wenqing
authors.initials: W
authors.lastname: Jiang
authors.forename: Bo
authors.initials: B
authors.lastname: Yu
authors.forename: Weimin
authors.initials: W
authors.lastname: Liu
authors.forename: Jingcheng
authors.initials: J
authors.lastname: Hao