Ionic liquids as lubricants of polystyrene and polyamide 6-steel contacts. Preparation and properties of new polymer-ionic liquid dispersions

Sanes, J.; Carrión, F.J.; Bermúdez, Marı́a-Dolores; Martı́nez-Nicolás, Ginés

doi:10.1007/s11249-006-9028-5

Cited by 120 publications

(88 citation statements)

References 28 publications

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“…This further stresses the relevance of the encapsulation concept for controlled, on-demand release at the contact surface. However, the works by Sanes et al [15] and Saur´ın et al…”

Section: Introductionmentioning

confidence: 97%

Tribological Performance of PTFE-based Coating Modified with Microencapsulated [HMIM][NTf2] Ionic Liquid

Bandeira

Monteiro²,

Baptista

et al. 2015

Tribol Lett

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In this work, a PTFE-based self-lubricating coating containing microencapsulated [HMIM][NTf2] ionic liquid (IL) lubricant is reported. The microcapsules, made of polysulphone, are prepared by solvent evaporation. In order to allow incorporation in the thin PTFE coating layer, which is applied by spraying, the capsules were produced with small sizes (below 10 m). Their physico-chemical characterization is presented in terms of SEM/EDS, TGA, FTIR and particle size distribution analysis. It is shown that both the encapsulant material and the IL lubricant are able to withstand the high-temperature curing conditions necessary for the coating system used (380 ºC during 30 min). Crossed-cylinders tribological testing of the applied coatings showed that incorporation of IL-containing capsules yields a reduction in coefficient of friction of up to 12 % when compared to the baseline formulation and a reduction of up to 70 % in wear rate under high load and low sliding speed conditions. The tribological behaviour of the modified coating is further assessed in different load and speed (P.V) combinations.

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“…This further stresses the relevance of the encapsulation concept for controlled, on-demand release at the contact surface. However, the works by Sanes et al [15] and Saur´ın et al…”

Section: Introductionmentioning

confidence: 97%

Tribological Performance of PTFE-based Coating Modified with Microencapsulated [HMIM][NTf2] Ionic Liquid

Bandeira

Monteiro²,

Baptista

et al. 2015

Tribol Lett

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“…In recent studies, we have shown that it is possible to improve the tribological performance of thermoplastics [34][35][36][37][38][39] and of epoxy resin [40] against steel by preparing new dispersions containing variable concentrations of ILs or IL-modified ZnO nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Single-walled carbon nanotubes modified by ionic liquid as antiwear additives of thermoplastics

Carrión

Espejo

Sanes

et al. 2010

Composites Science and Technology

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Please cite this article as: Carrión, F.J., Espejo, C., Sanes, J., Bermúdez, M.D., Single-walled carbon nanotubes modified by ionic liquid as antiwear additives of thermoplastics, Composites Science and Technology (2010), doi: 10.1016/j.compscitech.2010 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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“…[3][4][5][6][7][8][9][10][11][12] ILs generally show outstanding thermo-oxidative stability, this property being particularly important for lubricants that are used under extreme conditions. …”

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confidence: 99%

Design of Alkyl Sulfate Ionic Liquids for Lubricants

Itoh¹,

Watanabe

Inada

et al. 2008

Chemistry Letters

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Tribological properties of alkyl sulfate ionic liquids have been evaluated; hydrophobicity of ionic liquids significantly influenced the tribological characteristics and combination of phosphonium cation with hydrophobic octafluoropentyl sulfate anion afforded good ionic liquid that showed excellent tribological performance.Ionic liquids (ILs) are a new class of fluids and interest has been growing in their application in diverse fields of science and technology.1,2 The tribological properties of ionic liquids have attracted increased attention in recent years since Liu and coworkers 3a first reported the possible use of these compounds as a lubricant, because of their low volatility and flammability. [3][4][5][6][7][8][9][10][11][12] ILs generally show outstanding thermo-oxidative stability, this property being particularly important for lubricants that are used under extreme conditions. 13Alkyl sulfate ionic liquids are very economical and have broad potential in their molecular design.2c However, little attention has been given to their application as lubricant to date. We recently reported the successful design of hydrophobic alkyl sulfate ionic liquids using fluorine chemistry; 2e the hydrophobicity of alkyl sulfate imidazolium salts was dependent on the content ratio of the fluorine to the alkyl sulfate anion and 2,2,3,3,4,4,5,5-octafluoropentyl sulfate (C5F8) imidazolium salt showed perfect hydrophobic properties, 2e while non-fluorinated pentyl sulfate (C5F0) salt showed a strong hydrophilic nature. 2c,2e In this paper, we report the results of evaluation of alkyl sulfate ionic liquids as lubricants.Tribological properties for our three types of original ionic liquids, i.e. 1-butyl-3-methylimidazolium pentyl sulfate was 25 Â 7 mm made of SUJ2 steel (JIS). Friction force was monitored throughout the test and the data were converted to friction coefficient. Two tests were run for each set of test parameters, and differences in the results were less than 15%.Both imidazolium salts showed good lubricant properties that were lower than those from perfluoropolyether (PFPE), 13 which is widely used as a lubricant for head/disk interfaces or micromachines. However, a significant weak point was foundwas not constant during the experiments, it initially increased and then decreased with rubbing ( Figure 1). It was assumed that the friction became constant after 1000 s. owing to the reduced contact pressure by wear.On the contrary, no fluctuation of the friction coefficient was observed for [bmim][C5F8] (Figure 2). Since [bmim][C5F8] has perfect hydrophobic properties, no rust was found on the surface of the ball and disk; this provides a constant friction coefficient. The results suggest that hydrophobic ionic liquid is appropriate as a lubricant.It has been pointed out that reaction of iron metal with phosphorous forms a stable boundary film composed of iron phosphate and this generally contributes to an improvement in tribological properties.4 Therefore, we next tested ionic liquid2g as a lubricant under the sa...

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Ionic liquids as lubricants of polystyrene and polyamide 6-steel contacts. Preparation and properties of new polymer-ionic liquid dispersions

Cited by 120 publications

References 28 publications

Tribological Performance of PTFE-based Coating Modified with Microencapsulated [HMIM][NTf2] Ionic Liquid

Tribological Performance of PTFE-based Coating Modified with Microencapsulated [HMIM][NTf2] Ionic Liquid

Single-walled carbon nanotubes modified by ionic liquid as antiwear additives of thermoplastics

Design of Alkyl Sulfate Ionic Liquids for Lubricants

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