ES2609671A1 - Dispersion of graphene in an ionic liquid whose viscosity increases with temperature. (Machine-translation by Google Translate, not legally binding) - Google Patents

Dispersion of graphene in an ionic liquid whose viscosity increases with temperature. (Machine-translation by Google Translate, not legally binding) Download PDF

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Publication number
ES2609671A1
ES2609671A1 ES201730309A ES201730309A ES2609671A1 ES 2609671 A1 ES2609671 A1 ES 2609671A1 ES 201730309 A ES201730309 A ES 201730309A ES 201730309 A ES201730309 A ES 201730309A ES 2609671 A1 ES2609671 A1 ES 2609671A1
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Prior art keywords
ionic liquid
dispersion
graphene
viscosity increases
whose viscosity
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ES201730309A
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Spanish (es)
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ES2609671B2 (en
Inventor
María Dolores AVILÉS GONZÁLEZ
María Dolores Bermúdez Olivares
Francisco José CARRIÓN VILCHES
Tulia ESPINOSA RODRÍGUEZ
Ramón Francisco PAMIES PORRAS
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Universidad Politecnica de Cartagena
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Universidad Politecnica de Cartagena
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
    • C10M105/56—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing nitrogen
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M113/00—Lubricating compositions characterised by the thickening agent being an inorganic material
    • C10M113/02—Carbon; Graphite
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
    • C10M125/02—Carbon; Graphite

Abstract

Dispersion of graphene in an ionic liquid whose viscosity increases with temperature. The present invention relates to a dispersion comprising the ionic liquid dicyanamide of 1-ethyl-3-methylimidazolium and unmodified graphene particles dispersed in said ionic liquid. The dispersion of the unmodified graphene particles in the ionic liquid gives rise to a fluid free of toxic elements and whose viscosity increases with temperature under the action of a high shear gradient. The addition of graphene decreases the friction between surfaces, preferably in metal/ceramic or metal/metal contacts. (Machine-translation by Google Translate, not legally binding)

Description

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Ethyl-3-methylimidazolium Based Ionic Liquids Containing Cyano Groups: Synthesis, Characterization, and Crystal Structure” Inorganic Chemistry, 2004, 43 (4), pp. 1458-1462. Ethyl-3-methylimidazolium Based Ionic Liquids Containing Cyano Groups: Synthesis, Characterization, and Crystal Structure ”Inorganic Chemistry, 2004, 43 (4), pp. 1458-1462.

Para la obtención de esta composición se añadieron partículas de grafeno al líquido iónico formando una dispersión estable. Para dispersar correctamente el grafeno en el líquido iónico, se realizó una molienda mecánica manual en un mortero de ágata durante diez minutos y se dispersó posteriormente bajo sonicación durante media hora. La dispersión resultante presentaba color negro y una alta viscosidad. To obtain this composition graphene particles were added to the ionic liquid forming a stable dispersion. To properly disperse graphene in the ionic liquid, manual mechanical grinding was performed in an agate mortar for ten minutes and subsequently dispersed under sonication for half an hour. The resulting dispersion had black color and high viscosity.

La composición obtenida se sometió a un gradiente de cizalla de 50 s-1 en un reómetro rotacional AR-G2 de TA instruments (New Castle, Delawere, USA) en un rango de temperaturas de 25 a 150 ºC, observándose un aumento de la viscosidad al aumentar la temperatura, tal y como se presenta en la figura 1. The composition obtained was subjected to a shear gradient of 50 s-1 on an AR-G2 rotational rheometer from TA instruments (New Castle, Delawere, USA) in a temperature range of 25 to 150 ºC, observing an increase in viscosity as the temperature rises, as presented in figure 1.

Ejemplo 2 Example 2

En la figura 2 se comparan los coeficientes de fricción obtenidos para [EMIM][DCA] y para una dispersión de 1% en peso de grafeno en [EMIM][DCA], aplicado sobre un contacto metal/cerámico. En el contacto metal/cerámico empleado el metal era acero inoxidable 316L y el material cerámico un punzón de zafiro, con una carga aplicada de 1N y una velocidad de giro de 10 cm/s. Se pudo observar que, empleando la dispersión de 1% en peso de grafeno en [EMIM][DCA] para este contacto metal/cerámico, el coeficiente de fricción se redujo hasta en más de un 30%. The friction coefficients obtained for [EMIM] [DCA] and for a dispersion of 1% by weight of graphene in [EMIM] [DCA], applied on a metal / ceramic contact, are compared in Figure 2. In the metal / ceramic contact used the metal was 316L stainless steel and the ceramic material a sapphire punch, with an applied load of 1N and a rotation speed of 10 cm / s. It was observed that, using the dispersion of 1% by weight of graphene in [EMIM] [DCA] for this metal / ceramic contact, the friction coefficient was reduced by more than 30%.

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Claims (1)

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ES201730309A 2017-03-09 2017-03-09 Dispersion of graphene in an ionic liquid whose viscosity increases with temperature. Active ES2609671B2 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102533406A (en) * 2010-12-23 2012-07-04 中国科学院兰州化学物理研究所 Graphene-containing ionic liquid nanometer composite lubricating membrane
KR20160139213A (en) * 2015-05-27 2016-12-07 서울대학교산학협력단 Membranes for Heavy Metal Absorption and Method of Manufacturing The Same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102533406A (en) * 2010-12-23 2012-07-04 中国科学院兰州化学物理研究所 Graphene-containing ionic liquid nanometer composite lubricating membrane
KR20160139213A (en) * 2015-05-27 2016-12-07 서울대학교산학협력단 Membranes for Heavy Metal Absorption and Method of Manufacturing The Same

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
FENG, G. et al. . MOLECULAR SIMULATION STUDY OF DYNAMICAL PROPERTIES OF ROOM TEMPERATURE IONIC LIQUIDS WITH CARBON PIECES. Science China Chemistry, 2016, Vol. 59, Páginas 594-600 Ver resumen; página 3; columna 1; esquema 1; tabla 1. *
KHARE, V. et al. . GRAPHENE-IONIC LIQUID BASED HYBRID NANOMATERIALS AS NOVEL LUBRICANT FOR LOW FRICTION AND WEAR. ACS Applied Materials & Interfaces, 2013, Vol. 5, Páginas 4063-4075 Ver resumen. *
McCRARY, P.D. et al. . GRAPHENE AND GRAPHENE OXIDE CAN ?LUBRICATE? IONIC LIQUIDS BASED ON SPECIFIC SURFACE INTERACTIONS LEADING TO IMPROVED LOW-TEMPERATURE HYPERGOLIC PERFORMANCE. Angewandte Chemie International Ed. Engl, 2012, Vol. 51, Páginas 9784-9787 Ver página 9785, columna 2; párrafos 2 y 3. *

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