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Published in:

01-10-2016 | Original Paper

Neutralization Mechanism of Acetic Acid by Overbased Colloidal Nanoparticles

Authors: Yufei Duan, Riccardo Rausa, Qi Zhao, Kyriakos D. Papadopoulos

Published in: Tribology Letters | Issue 1/2016

Abstract

The neutralization reaction mechanism of acetic acid by fully formulated lubricant oil is discussed in this paper. The video analysis of acetic-acid droplets in oil phase indicates that neutralization exists simultaneously on the oil–acid interface and bulk oil phase during the droplet shrinkage. This behavior is different from the one exhibited by sulfuric acid, which is insoluble in base oil and its neutralization by overbased lubricant occurs exclusively at the oil–acid interface. Besides, FTIR and NMR analyses show the neutralization of acetic acid as an instantaneous process, and almost all of the dissolved acetic acids in the bulk are eventually neutralized. Therefore, a two-mode-mechanism, including both interfacial and bulk reaction, is proposed for the neutralization of acetic acid by overbased nanoparticles. At the end, tribological behavior of sulfuric acid and acetic-acid neutralization products is discussed.

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Title: Neutralization Mechanism of Acetic Acid by Overbased Colloidal Nanoparticles
Authors: Yufei Duan
Riccardo Rausa
Qi Zhao
Kyriakos D. Papadopoulos
Publication date: 01-10-2016
Publisher: Springer US
Published in: Tribology Letters / Issue 1/2016
Print ISSN: 1023-8883
Electronic ISSN: 1573-2711
DOI: https://doi.org/10.1007/s11249-016-0742-3

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