Tribological Behaviour of PVD Coatings Lubricated with a FAP− Anion-Based Ionic Liquid Used as an Additive

Viesca, J.L.; Anand, Mayank; Blanco, David; Fernández‐González, Alfonso; Garcı́a, Agustı́n Costa; Hadfield, M.

doi:10.3390/lubricants4010008

Cited by 18 publications

(10 citation statements)

References 60 publications

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“…In addition to the polymeric matrix, different types of additives, extenders and pigments are present in the formulation and require to be well dispersed in the matrix in order to exploit their functions [ 12 , 13 ]. The most common additives are rheological modifiers, antifoams and dispersing agents [ 5 , 12 , 14 , 15 , 16 , 17 ]. Rheological additives act on the viscosity of the samples, allowing to increase or reduce their tendency to flow and avoid the sagging phenomenon during the application step (i.e., thixotropic recovery), whereas anti-foams are used to obviate the formation of foams during the dispersion of extenders in the matrix phase [ 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Rheological, Mechanical and Morphological Characterization of Fillers in the Nautical Field: The Role of Dispersing Agents on Composite Materials

Vita

Ricotti²,

Dodero

et al. 2020

Polymers

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Coatings have a fundamental role in covering the external surface of yachts by acting both as protective and aesthetic layers. In particular, fillers represent the essential layer from the point of view of mechanical properties and consist of a polymeric matrix, different extenders and additives, and dispersing agents, with the latter having the role to provide good extender-matrix compatibility. In the present work, the effects of dispersing agents with an ionic or steric action on the interactions between hollow glass microspheres and an epoxy-polyamide resin are evaluated. Un-crosslinked filler materials are studied via rheological tests, whereas the mechanical and morphological properties of the crosslinked samples are assessed. The results clearly indicate that steric dispersing agents provide a much greater compatibility effect compared to ionic ones, owing to their steric hindrance capability, thus leading to better-performing filler materials with a less-marked Payne effect, which is here proved to be an efficient tool to provide information concerning the extent of component interactions in nautical fillers. To the best of our knowledge, this work represents the first attempt to deeply understand the role of dispersing agents, which are until now empirically used in the preparation of fillers.

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Section: Introductionmentioning

confidence: 99%

Rheological, Mechanical and Morphological Characterization of Fillers in the Nautical Field: The Role of Dispersing Agents on Composite Materials

Vita

Ricotti²,

Dodero

et al. 2020

Polymers

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“…Despite their good tribological behaviour, the hydrolysis products of those anions are highly corrosive [36]. This fact provoked the introduction of new and more stable ILs based on [FAP] and [NTf 2 ] anions [37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53], which present enhanced tribological properties due to the formation of fluoride tribofilms, especially at high loads [54]. Recently, phosphonium cation-based ILs have been introduced in this field because of their growing commercial availability and good tribological performance [26,[55][56][57][58][59][60][61][62].…”

Section: Introductionmentioning

confidence: 99%

Isoconversional kinetic analysis applied to five phosphonium cation-based ionic liquids

et al. 2017

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Thermal degradation of five phosphonium cation-based ionic liquids ([P 66614 outperforming the other ones in both pyrolytic and oxidising conditions. Although the thermal degradation mechanism is affected by atmospheric conditions, the degradation trend remains practically constant. As the dynamic methodology usually overestimates the long-term thermal stability, an isoconversional methodology is better for predicting the long-term thermal stability of these ionic liquids in order to be used as base oil or additive in lubricants formulation. Finally, the model-free methodology can predict at lower costs the ILs performance in isothermal conditions. Highlights• Weakly coordinating anions provoke good thermal stability of ILs.• • Isoconversional methods are better than dynamic ones for long-term thermal studies.• Activation energy behavior at low conversions is related to a single reaction.• Model-free methodology can predict the ILs performance in isothermal conditions.

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“…Lightweight materials (aluminum alloys and silicon) are also widely used [17][18][19][20][21][22][23]. In addition, other materials and coatings used in engineering applications, such as titanium, copper, sialon ceramics, electro-deposited Ni/Si3N4 composed coating, have also been tested when lubricated with ILs in recent years [24][25][26][27][28][29][30]. Some ammonium cation-based ionic liquids were studied in order to prove their feasibility for use in lubrication, obtaining both great antifriction and antiwear results [31][32] and good physicochemical and environmental properties [33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Tribological behavior of three fatty acid ionic liquids in the lubrication of different material pairs

Rivera

Garcı́a

Fernández-González

et al. 2019

Journal of Molecular Liquids

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Tribological behavior of three Fatty Acid anion-based Ionic Liquids (FAILs) with the same ammonium cation ([N8881]) and different anions ([C16:0], [C12:0] and [C8:0]) were studied. Four different tribopairs (steelsteel, aluminum-steel, bronze-steel and tungsten carbide-steel) were tested for each FAIL using a ball-ondisc reciprocating test for 30 min (room temperature, 50 N-load, 4 mm of stroke length, and 15 Hzfrequency). Aluminum and tungsten carbide surfaces did not show evidence of oxidation changes, contact pressure and hardness being, respectively, the main parameters controlling tribological behavior. Bronze and steel samples showed surface oxidation changes during tests, which influenced friction and/or wear results. An increase in alkyl chain length of the anion led to an increase in tin oxidation of bronze and the formation of a low friction film of Fe3O4 on steel.

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Tribological Behaviour of PVD Coatings Lubricated with a FAP− Anion-Based Ionic Liquid Used as an Additive

Cited by 18 publications

References 60 publications

Rheological, Mechanical and Morphological Characterization of Fillers in the Nautical Field: The Role of Dispersing Agents on Composite Materials

Rheological, Mechanical and Morphological Characterization of Fillers in the Nautical Field: The Role of Dispersing Agents on Composite Materials

Isoconversional kinetic analysis applied to five phosphonium cation-based ionic liquids

Tribological behavior of three fatty acid ionic liquids in the lubrication of different material pairs

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