A study of the structure formed by thickeners of greases using atomic force microscope

Michita Hokao, Noriyuki Inami, Eri Watabe, Atsushi Yokouchi, Joichi Sugimura

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This paper describes an experimental study on quantitative evaluation of correlation between the structure formed by thickeners and yield stress of greases. In order to evaluate the thickener structures, untreated surface of greases was observed by using an atomic force microscope, and an index was obtained from AFM images to describe the degree of dispersion of the thickeners. The index physically represented both factors of shape and distribution of thickeners. The results for twelve types of lithium soap greases with different base oils and thickener concentrations showed good correlation between the index of the degree of dispersion and the yield stress of the greases. This relationship indicated that uniform distribution of thickeners in greases caused higher yield stress.

Original languageEnglish
Pages (from-to)76-82
Number of pages7
JournalTribology Online
Volume8
Issue number1
DOIs
Publication statusPublished - May 22 2013

Fingerprint

Lubricating greases
Microscopes
Yield stress
Soaps (detergents)
Lithium
Oils

All Science Journal Classification (ASJC) codes

  • Surfaces, Coatings and Films

Cite this

A study of the structure formed by thickeners of greases using atomic force microscope. / Hokao, Michita; Inami, Noriyuki; Watabe, Eri; Yokouchi, Atsushi; Sugimura, Joichi.

In: Tribology Online, Vol. 8, No. 1, 22.05.2013, p. 76-82.

Research output: Contribution to journalArticle

Hokao, Michita ; Inami, Noriyuki ; Watabe, Eri ; Yokouchi, Atsushi ; Sugimura, Joichi. / A study of the structure formed by thickeners of greases using atomic force microscope. In: Tribology Online. 2013 ; Vol. 8, No. 1. pp. 76-82.
@article{18ef94b1878346929721ced9a3c079ab,
title = "A study of the structure formed by thickeners of greases using atomic force microscope",
abstract = "This paper describes an experimental study on quantitative evaluation of correlation between the structure formed by thickeners and yield stress of greases. In order to evaluate the thickener structures, untreated surface of greases was observed by using an atomic force microscope, and an index was obtained from AFM images to describe the degree of dispersion of the thickeners. The index physically represented both factors of shape and distribution of thickeners. The results for twelve types of lithium soap greases with different base oils and thickener concentrations showed good correlation between the index of the degree of dispersion and the yield stress of the greases. This relationship indicated that uniform distribution of thickeners in greases caused higher yield stress.",
author = "Michita Hokao and Noriyuki Inami and Eri Watabe and Atsushi Yokouchi and Joichi Sugimura",
year = "2013",
month = "5",
day = "22",
doi = "10.2474/trol.8.76",
language = "English",
volume = "8",
pages = "76--82",
journal = "Tribology Online",
issn = "1881-218X",
publisher = "Japanese Society of Tribologists",
number = "1",

}

TY - JOUR

T1 - A study of the structure formed by thickeners of greases using atomic force microscope

AU - Hokao, Michita

AU - Inami, Noriyuki

AU - Watabe, Eri

AU - Yokouchi, Atsushi

AU - Sugimura, Joichi

PY - 2013/5/22

Y1 - 2013/5/22

N2 - This paper describes an experimental study on quantitative evaluation of correlation between the structure formed by thickeners and yield stress of greases. In order to evaluate the thickener structures, untreated surface of greases was observed by using an atomic force microscope, and an index was obtained from AFM images to describe the degree of dispersion of the thickeners. The index physically represented both factors of shape and distribution of thickeners. The results for twelve types of lithium soap greases with different base oils and thickener concentrations showed good correlation between the index of the degree of dispersion and the yield stress of the greases. This relationship indicated that uniform distribution of thickeners in greases caused higher yield stress.

AB - This paper describes an experimental study on quantitative evaluation of correlation between the structure formed by thickeners and yield stress of greases. In order to evaluate the thickener structures, untreated surface of greases was observed by using an atomic force microscope, and an index was obtained from AFM images to describe the degree of dispersion of the thickeners. The index physically represented both factors of shape and distribution of thickeners. The results for twelve types of lithium soap greases with different base oils and thickener concentrations showed good correlation between the index of the degree of dispersion and the yield stress of the greases. This relationship indicated that uniform distribution of thickeners in greases caused higher yield stress.

UR - http://www.scopus.com/inward/record.url?scp=84877863026&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84877863026&partnerID=8YFLogxK

U2 - 10.2474/trol.8.76

DO - 10.2474/trol.8.76

M3 - Article

AN - SCOPUS:84877863026

VL - 8

SP - 76

EP - 82

JO - Tribology Online

JF - Tribology Online

SN - 1881-218X

IS - 1

ER -