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Citation: Li Ganzuo, Shen Qiang, Ma Chengsong, Liu Weimin, Xun Qiunji. Lubrication of Lyotropic Liquid Crystals in DCD/C₄H₉OH/LP/H₂O System[J]. Chinese Journal of Applied Chemistry, ;1997, 14(4): 55-58. shu

Lubrication of Lyotropic Liquid Crystals in DCD/C₄H₉OH/LP/H₂O System

1.
1. Shandong University, Colloid andi Interface Chemistry Open Laboratory of Education Ministry, Jinan 250100;
2.
2. Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou

Received Date: 31 December 1996
Available Online: 5 May 1997
Fund Project:

The phase diagram of the system of dodecyl carboxylic diethanolamine (DCD)/n-butanol (C₄H₉OH)/paraffin oil(LP)/water has been investigated. The phase structures of two points chosen from the liquid crystal phase region were determined by ²H NMR spectroscopy and polarized-light microscope. The wear scar widths and the vertical loads of the two samples on the surface of aluminium alloy were measured and compared with those of water, paraffin oil, n-butanol, paraffin oil+2%n-butanol, paraffin oil+2%diethanolamine and lithium grease. The results indicate that the frictional force of the lamellar liquid crystal in the direction parallel to the surface of the alloy aluminium is very small, and the lamellar liquid crystal appear to be a good lubricant.
- dodecyl carboxylic diethanolamine,
- butanol,
- paraffin oil,
- water,
- lyotropic liquid crystal,
- lubrication
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Lubrication of Lyotropic Liquid Crystals in DCD/C₄H₉OH/LP/H₂O System