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碳纳米管掺入在室温离子液体中形成的溶致六方液晶内。

Carbon nanotubes incorporated within lyotropic hexagonal liquid crystal formed in room-temperature ionic liquids.

作者信息

Jiang Wenqing, Yu Bo, Liu Weimin, Hao Jingcheng

机构信息

Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, China.

出版信息

Langmuir. 2007 Jul 31;23(16):8549-53. doi: 10.1021/la700921w. Epub 2007 Jul 4.

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.

摘要

多壁碳纳米管(MWCNTs)均匀分散在室温离子液体(RTILs)硝酸乙铵(EAN)中形成的六方溶致液晶(LLCs)内。详细研究了分散体系的表征和摩擦学性能。偏光显微镜图像与小角X射线散射(SAXS)结果表明,MWCNTs分散良好,且MWCNTs的引入并未破坏六方LLCs的结构。d间距的增加表明MWCNTs整合到了六方LLCs的圆柱体内。MWCNTs-LLC复合材料的傅里叶变换红外光谱(FT-IR)和拉曼光谱显示了MWCNTs的特征吸收峰和拉曼谱带。对摩擦学性能进行了探索,以极大地扩展MWCNTs-LLC复合材料在RTILs中作为润滑材料的应用。流变学测量结果表明,MWCNTs-LLC复合材料具有高粘弹性,且MWCNTs的存在提高了表观粘度。

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