Hydrophobic ionic liquids at liquid and solid interfaces

Diogo Magalhães e Silva; Tânia Ribeiro; Luís C. Branco; Rogério Colaço; Amélia Gonçalves da Silva; Benilde Saramago

doi:10.1016/j.triboint.2018.08.018

Hydrophobic ionic liquids at liquid and solid interfaces

Diogo Magalhães e Silva, Tânia Ribeiro, Luís C. Branco, Rogério Colaço, Amélia Gonçalves da Silva, Benilde Saramago

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

8 Citations (Scopus)

Abstract

The aim of the present work was to contribute for a deeper understanding of the intermolecular interactions present in ionic liquid (IL) tribofilms through the comparative study of the ILs behavior at water and at silica surfaces. Three hydrophobic ILs were investigated at the air/water interface (Langmuir trough) and at the water/silica interface (adsorption, friction and wear). The same experiments were repeated with aqueous solutions of ILs containing the anionic surfactant sodium n-hexadecylsulphate (SHS). The main conclusion was that ILs and IL + SHS solutions able to form Langmuir monolayers are those which adsorb more strongly on the silica surface and which provide better protection to surface wear.

Original language	English
Pages (from-to)	459-467
Number of pages	9
Journal	Tribology international
Volume	129
DOIs	https://doi.org/10.1016/j.triboint.2018.08.018
Publication status	Published - 1 Jan 2019

Keywords

Adsorption
Hydrophobic ionic liquids
Langmuir monolayers
Tribology

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10.1016/j.triboint.2018.08.018Licence: CC BY-NC-ND

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abstract = "The aim of the present work was to contribute for a deeper understanding of the intermolecular interactions present in ionic liquid (IL) tribofilms through the comparative study of the ILs behavior at water and at silica surfaces. Three hydrophobic ILs were investigated at the air/water interface (Langmuir trough) and at the water/silica interface (adsorption, friction and wear). The same experiments were repeated with aqueous solutions of ILs containing the anionic surfactant sodium n-hexadecylsulphate (SHS). The main conclusion was that ILs and IL + SHS solutions able to form Langmuir monolayers are those which adsorb more strongly on the silica surface and which provide better protection to surface wear.",

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AU - Magalhães e Silva, Diogo

AU - Ribeiro, Tânia

AU - Branco, Luís C.

AU - Colaço, Rogério

AU - Silva, Amélia Gonçalves da

AU - Saramago, Benilde

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N2 - The aim of the present work was to contribute for a deeper understanding of the intermolecular interactions present in ionic liquid (IL) tribofilms through the comparative study of the ILs behavior at water and at silica surfaces. Three hydrophobic ILs were investigated at the air/water interface (Langmuir trough) and at the water/silica interface (adsorption, friction and wear). The same experiments were repeated with aqueous solutions of ILs containing the anionic surfactant sodium n-hexadecylsulphate (SHS). The main conclusion was that ILs and IL + SHS solutions able to form Langmuir monolayers are those which adsorb more strongly on the silica surface and which provide better protection to surface wear.

AB - The aim of the present work was to contribute for a deeper understanding of the intermolecular interactions present in ionic liquid (IL) tribofilms through the comparative study of the ILs behavior at water and at silica surfaces. Three hydrophobic ILs were investigated at the air/water interface (Langmuir trough) and at the water/silica interface (adsorption, friction and wear). The same experiments were repeated with aqueous solutions of ILs containing the anionic surfactant sodium n-hexadecylsulphate (SHS). The main conclusion was that ILs and IL + SHS solutions able to form Langmuir monolayers are those which adsorb more strongly on the silica surface and which provide better protection to surface wear.

KW - Adsorption

KW - Hydrophobic ionic liquids

KW - Langmuir monolayers

KW - Tribology

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SN - 0301-679X

VL - 129

SP - 459

EP - 467

JO - Tribology international

JF - Tribology international

ER -

Hydrophobic ionic liquids at liquid and solid interfaces

Abstract

Keywords

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