Significant enhancement of anti-friction capability of cationic surfactant by phosphonate functionality as additive in water

A new N-(3-(diethoxyphosphoryl)propyl)-N,N-dimethyloctadecan- 1-ammonium bromide (NP) surfactant was synthesized. The NP together with 1wt% sodium D-gluconate or 1wt% triethanolamine displays remarkable lubricating property as the water-based lubricant additive and provides a non-corrosive environme...

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Published inTribology international Vol. 112; pp. 86 - 93
Main Authors Wang, Yurong, Yu, Qiangliang, Ma, Zhengfeng, Huang, Guowei, Cai, Meirong, Zhou, Feng, Liu, Weimin
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 01.08.2017
Elsevier BV
Subjects
Antiwear
Aqueous solutions
Cations
Chemical reactions
Contact resistance
Electric contacts
Electric resistance
Ionic liquids
Lubricants
Lubrication
Protective coatings
Quartz
Spectrum analysis
Studies
Surfactant
Triethanolamine
Water-based lubrication additives
Ionic liquids
Water-based lubrication additives
Antiwear
Surfactant
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Summary:A new N-(3-(diethoxyphosphoryl)propyl)-N,N-dimethyloctadecan- 1-ammonium bromide (NP) surfactant was synthesized. The NP together with 1wt% sodium D-gluconate or 1wt% triethanolamine displays remarkable lubricating property as the water-based lubricant additive and provides a non-corrosive environment for steel in aqueous solution. The lubricating mechanism was tentatively discussed according to electrical contact resistance, X-ray photoelectron spectroscopy and Quartz Crystal Microbalance measurement. These results show a stable protective film is formed on the contact surface by physical adsorption and tribo-chemical reactions. Surprisingly, the water-based additive has excellent anti-friction properties comparable to oil-based lubricants and superior to cationic surfactant analogue. Therefore, this NP is a potential efficient additive in water-based lubricating fluids. [Display omitted] •A N-(3-(diethoxyphosphoryl)propyl)-N,N-dimethyloctadecan- 1-ammonium bromide (NP) was synthesized.•The NP can significantly reduce the coefficient of friction to 0.076.•The NP presents remarkable extreme-pressure and abrasion resistance behaviors.•The NP significantly enhances the anti-friction capability of cationic surfactant by phosphonate functionality.
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ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2017.03.034