Water-based Lubricating Properties of Aqueous Hydroxyethyl Cellulose in Surface Contact

doi:10.3901/JME.2019.01.120

Abstract

Abstract: HEC solutions of varying concentration are used as water-based lubricant. FT-IR Spectrum and Molecular Dynamics were used to study the interaction between HEC and water. 3D optical surface profiler is used to measure the surface of friction pairs. The friction tests for effect of speed, load and concentration on lubricating behavior of HEC in surface contact are carried out on a modified friction tribometer (UMT-2). The results indicate that strong hydrogen bond occurs between HEC and water; the lubrication action isn't enhanced by changing the rotation speed; the lubricant spread evenly under heavier load, which made the coefficient of friction (COF) decrease with the increasing load; the COF of the 1.00 wt.% solution was the lowest under different loads, while the COF increased in other solutions. The water-based lubricating film contains water layer and hydration layer of hydroxyethyl cellulose, in which the latter is dominant.

Key words: hydroxyethyl cellulose, molecular dynamics, super-low friction, surface contact, water-based lubrication

CLC Number:

TG356

SHENG Dezun, ZHANG Huichen. Water-based Lubricating Properties of Aqueous Hydroxyethyl Cellulose in Surface Contact[J]. Journal of Mechanical Engineering, 2019, 55(1): 120-128.

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