颗粒形态和浓度对纳米石墨冷冻机油密度和黏度的影响

doi:10.3969/j.issn.0438-1157.2014.10.014

化工学报 ›› 2014, Vol. 65 ›› Issue (10): 3846-3851.DOI: 10.3969/j.issn.0438-1157.2014.10.014

颗粒形态和浓度对纳米石墨冷冻机油密度和黏度的影响

娄江峰¹, 张华¹, 王瑞祥², 李萌¹

1 上海理工大学能源与动力工程学院, 上海 200093;
2 北京建筑大学环境与能源工程学院, 北京 100044

收稿日期:2014-02-26 修回日期:2014-04-28 出版日期:2014-10-05 发布日期:2014-10-05
通讯作者: 张华
基金资助:
上海市研究生创新基金项目（JWCXSL1101）；上海市重点学科建设项目（S30503）。

Effect of particle morphology and concentration on density and viscosity of graphite nanolubricant

LOU Jiangfeng¹, ZHANG Hua¹, WANG Ruixiang², LI Meng¹

1 School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;
2 School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China

Received:2014-02-26 Revised:2014-04-28 Online:2014-10-05 Published:2014-10-05
Supported by:
supported by the Innovation Fund Project for Graduate Student of Shanghai (JWCXL1201) and Shanghai Leading Academic Discipline Project (S30503).

摘要/Abstract

摘要： 采用硅烷偶联剂KH570对两种形态的纳米石墨进行表面改性，配制了稳定性良好的环烷基纳米冷冻机油。利用振荡密度仪和旋转黏度计对纳米石墨冷冻机油（纳米石墨为粒状和片状，质量分数为0.05%、0.1%、0.2%、0.5%、1%、1.5%、2%）在不同温度（288～343 K）下的密度和黏度进行了测试。结果表明：纳米石墨冷冻机油的密度和黏度随着纳米颗粒浓度的增加而增大；相同浓度下添加片状石墨的纳米冷冻机油密度大于粒状，添加粒状石墨的纳米冷冻机油黏度大于片状，且在温度高于313 K时黏度也有明显上升；基于纳米石墨的浓度、粒径及形态开发了密度和黏度关联式，其中密度计算值与实验数据基本吻合，黏度计算值与90%的实验数据偏差在±5%以内。

关键词: 纳米粒子, 表面活性剂, 密度, 黏度, 粒径, 关联式

Abstract: Naphthenic base nanolubricants with good stability were prepared by modifying nano graphite in two forms with silane coupling agent KH570. An oscillating densitometer and a rotary viscometer were used to test the density and viscosity of graphite nanolubricants with mass fraction of 0.05%, 0.1%, 0.2%, 0.5%, 1%, 1.5%, and 2% in a temperature range from 288 K to 343 K. The results show that the density and viscosity of graphite nanolubricants increase with the increase of nanoparticle mass fraction. The densities of nanolubricants adding plate-shape graphite are higher than those with spherical graphite at the same mass fraction, while the viscosity shows opposite trend. The viscosity increases obviously at the temperature higher than 313 K with spherical graphite added. Correlations for the density and viscosity are developed as a function of nanoparticle concentration, particle size and shape. The correlation for density agrees well with experimental results, with 90% of the viscosities predicted within ±5% deviation from the measurement.

Key words: nanoparticles, surfactant, density, viscosity, particle size, correlation

中图分类号:

娄江峰, 张华, 王瑞祥, 李萌. 颗粒形态和浓度对纳米石墨冷冻机油密度和黏度的影响[J]. 化工学报, 2014, 65(10): 3846-3851.

LOU Jiangfeng, ZHANG Hua, WANG Ruixiang, LI Meng. Effect of particle morphology and concentration on density and viscosity of graphite nanolubricant[J]. CIESC Journal, 2014, 65(10): 3846-3851.

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颗粒形态和浓度对纳米石墨冷冻机油密度和黏度的影响

Effect of particle morphology and concentration on density and viscosity of graphite nanolubricant

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