Publication result detail

Use of Pyrene for Quantitative Fluorescence Observation of Li-Grease around EHL Contacts

KOŠŤÁL, D.; KŘUPKA, I.; HARTL, M.

Original Title

Use of Pyrene for Quantitative Fluorescence Observation of Li-Grease around EHL Contacts

English Title

Use of Pyrene for Quantitative Fluorescence Observation of Li-Grease around EHL Contacts

Type

WoS Article

Original Abstract

This paper presents a simple approach for the use of pyrene as fluorescence dye for the observation of the EHL contacts and behavior of lubricants without natural fluorescence properties. Dependence of the light emission of pyrene on its concentration was studied and also, specific emission and excitation spectrum for pyrene dissolved in PAO was found. A mercury lamp was used as the source of the excitation light with proper filter set according to the fluorescence spectrum. Pyrene’s excimer proved to be very resistive against photobleaching and stable in time. This paper also describes experimental methodology on how to improve fluorescence properties of greases by adding pyrene and this approach was also verified by experiments to ensure that there was no influence on grease or pyrene’s emission. This paper also discusses the calibration procedure for valid quantitative experiments.

English abstract

This paper presents a simple approach for the use of pyrene as fluorescence dye for the observation of the EHL contacts and behavior of lubricants without natural fluorescence properties. Dependence of the light emission of pyrene on its concentration was studied and also, specific emission and excitation spectrum for pyrene dissolved in PAO was found. A mercury lamp was used as the source of the excitation light with proper filter set according to the fluorescence spectrum. Pyrene’s excimer proved to be very resistive against photobleaching and stable in time. This paper also describes experimental methodology on how to improve fluorescence properties of greases by adding pyrene and this approach was also verified by experiments to ensure that there was no influence on grease or pyrene’s emission. This paper also discusses the calibration procedure for valid quantitative experiments.

Keywords

grease, elastohydrodynamic lubrication, fluorescence, pyrene, excimer, monomer

Key words in English

grease, elastohydrodynamic lubrication, fluorescence, pyrene, excimer, monomer

Authors

KOŠŤÁL, D.; KŘUPKA, I.; HARTL, M.

RIV year

2021

Released

01.06.2020

ISBN

1881-218X

Periodical

Tribology Online

Volume

15

Number

3

State

Japan

Pages from

117

Pages to

125

Pages count

9

URL

https://www.jstage.jst.go.jp/article/trol/15/3/15_117/_pdf/-char/en

BibTex

@article{BUT164132,
  author="David {Košťál} and Ivan {Křupka} and Martin {Hartl}",
  title="Use of Pyrene for Quantitative Fluorescence Observation of Li-Grease around EHL Contacts",
  journal="Tribology Online",
  year="2020",
  volume="15",
  number="3",
  pages="117--125",
  doi="10.2474/trol.15.117",
  issn="1881-218X",
  url="https://www.jstage.jst.go.jp/article/trol/15/3/15_117/_pdf/-char/en"
}