面接触下水合羟乙基纤维素的润滑特性研究

doi:10.3901/JME.2019.01.120

机械工程学报 ›› 2019, Vol. 55 ›› Issue (1): 120-128.doi: 10.3901/JME.2019.01.120

面接触下水合羟乙基纤维素的润滑特性研究

盛德尊, 张会臣

大连海事大学交通运输装备与海洋工程学院大连 116026

收稿日期:2018-01-19 修回日期:2018-05-03 出版日期:2019-01-05 发布日期:2019-01-05
通讯作者: 张会臣(通信作者),男,1965年出生,博士,教授,博士研究生导师。主要研究方向为纳米摩擦学。E-mail:hczhang@dlmu.edu.cn
作者简介:盛德尊,男,1990年出生,博士研究生。主要研究方向为水基润滑理论与应用。E-mail:shengdezun@163.com
基金资助:
国家自然科学基金资助项目（51335005）。

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

SHENG Dezun, ZHANG Huichen

Transportation Equipments and Ocean Engineering College, Dalian Maritime University, Dalian 116026

Received:2018-01-19 Revised:2018-05-03 Online:2019-01-05 Published:2019-01-05

摘要/Abstract

摘要： 以羟乙基纤维素（HEC）作为水基润滑添加剂，研究面接触条件下HEC润滑液的润滑特性。采用红外光谱仪分析HEC化学组成，结合分子动力学模拟分析HEC与水分子的相互作用，采用白光干涉三维表面形貌仪测量试样的表面形貌，借助微摩擦磨损试验机（UMT-2）探究转速、载荷、质量分数对润滑液润滑特性的影响。结果表明：HEC可以与水分子形成中、高强度的氢键；转速变化在摩擦副入口处对润滑液的成膜过程产生影响，进入摩擦副的润滑膜可以保持稳定的润滑状态，摩擦因数随转速增大几乎不变；增大载荷，润滑液在摩擦副间分布更加均匀，提升润滑性能，摩擦因数随载荷增大而减小；随润滑液质量分数增大，摩擦因数先减小后增大，质量分数为1.00%时摩擦因数最小。提出羟乙基纤维素水基润滑模型，模型包括水分子层和水合羟乙基纤维素层，其中水合羟乙基纤维素层起主要作用。

关键词: 分子动力学模拟, 极低摩擦因数, 面接触, 羟乙基纤维素, 水基润滑

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

中图分类号:

TG356

盛德尊, 张会臣. 面接触下水合羟乙基纤维素的润滑特性研究[J]. 机械工程学报, 2019, 55(1): 120-128.

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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面接触下水合羟乙基纤维素的润滑特性研究

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

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