Turning the solubility and lubricity of ionic liquids by absorbing CO2

Jian Wu; Liwen Mu; Jiahua Zhu; Yifeng Chen; Xiang Yin; Xin Feng; Xiaohua Lu; Roland Larsson; Yijun Shi

doi:10.1016/j.triboint.2018.01.039

Turning the solubility and lubricity of ionic liquids by absorbing CO₂

Jian Wu, Liwen Mu, Jiahua Zhu, Yifeng Chen, Xiang Yin, Xin Feng, Xiaohua Lu, Roland Larsson, Yijun Shi

College of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

Ionic liquids (ILs) attract high interest as lubricants or lubricant additives due to their special physicochemical characteristics. CO₂ is a widely distributed gas. In many situations, its influence on lubricants cannot be avoided. In this work, three ILs are synthesized from choline and amino acids of glycine, L-proline and lysine, respectively. The influence of CO₂ absorption on their solubility and lubricity is investigated. In general, it is interesting to find that the solubility is decreased and their lubricity is obviously improved after absorbing CO₂, which is strongly related to their functional group (amino group) interactions with CO₂. The formation of carbamate groups greatly increases the viscosity resulting in less solid contacts, and strengthens the interfacial adhesion between ILs and solids.

Original language	English
Pages (from-to)	223-230
Number of pages	8
Journal	Tribology International
Volume	121
DOIs	https://doi.org/10.1016/j.triboint.2018.01.039
State	Published - May 2018

Keywords

Carbon dioxide
Ionic liquids
Lubrication
Solubility

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10.1016/j.triboint.2018.01.039

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title = "Turning the solubility and lubricity of ionic liquids by absorbing CO2",

abstract = "Ionic liquids (ILs) attract high interest as lubricants or lubricant additives due to their special physicochemical characteristics. CO2 is a widely distributed gas. In many situations, its influence on lubricants cannot be avoided. In this work, three ILs are synthesized from choline and amino acids of glycine, L-proline and lysine, respectively. The influence of CO2 absorption on their solubility and lubricity is investigated. In general, it is interesting to find that the solubility is decreased and their lubricity is obviously improved after absorbing CO2, which is strongly related to their functional group (amino group) interactions with CO2. The formation of carbamate groups greatly increases the viscosity resulting in less solid contacts, and strengthens the interfacial adhesion between ILs and solids.",

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author = "Jian Wu and Liwen Mu and Jiahua Zhu and Yifeng Chen and Xiang Yin and Xin Feng and Xiaohua Lu and Roland Larsson and Yijun Shi",

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T1 - Turning the solubility and lubricity of ionic liquids by absorbing CO2

AU - Wu, Jian

AU - Mu, Liwen

AU - Zhu, Jiahua

AU - Chen, Yifeng

AU - Yin, Xiang

AU - Feng, Xin

AU - Lu, Xiaohua

AU - Larsson, Roland

AU - Shi, Yijun

PY - 2018/5

Y1 - 2018/5

N2 - Ionic liquids (ILs) attract high interest as lubricants or lubricant additives due to their special physicochemical characteristics. CO2 is a widely distributed gas. In many situations, its influence on lubricants cannot be avoided. In this work, three ILs are synthesized from choline and amino acids of glycine, L-proline and lysine, respectively. The influence of CO2 absorption on their solubility and lubricity is investigated. In general, it is interesting to find that the solubility is decreased and their lubricity is obviously improved after absorbing CO2, which is strongly related to their functional group (amino group) interactions with CO2. The formation of carbamate groups greatly increases the viscosity resulting in less solid contacts, and strengthens the interfacial adhesion between ILs and solids.

AB - Ionic liquids (ILs) attract high interest as lubricants or lubricant additives due to their special physicochemical characteristics. CO2 is a widely distributed gas. In many situations, its influence on lubricants cannot be avoided. In this work, three ILs are synthesized from choline and amino acids of glycine, L-proline and lysine, respectively. The influence of CO2 absorption on their solubility and lubricity is investigated. In general, it is interesting to find that the solubility is decreased and their lubricity is obviously improved after absorbing CO2, which is strongly related to their functional group (amino group) interactions with CO2. The formation of carbamate groups greatly increases the viscosity resulting in less solid contacts, and strengthens the interfacial adhesion between ILs and solids.

KW - Carbon dioxide

KW - Ionic liquids

KW - Lubrication

KW - Solubility

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DO - 10.1016/j.triboint.2018.01.039

M3 - 文章

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SN - 0301-679X

VL - 121

SP - 223

EP - 230

JO - Tribology International

JF - Tribology International

ER -

Turning the solubility and lubricity of ionic liquids by absorbing CO₂

Abstract

Keywords

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