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    • 专利摘要:
    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)
    公开号:ES2609671A1
    申请号:ES201730309
    申请日:2017-03-09
    公开日:2017-04-21
    发明作者:María Dolores AVILÉS GONZÁLEZ；María Dolores Bermúdez Olivares；Francisco José CARRIÓN VILCHES；Tulia ESPINOSA RODRÍGUEZ；Ramón Francisco PAMIES PORRAS
    申请人:Universidad Politecnica de Cartagena；
    IPC主号:
    专利说明:

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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.
    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.
    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.
    Example 2
    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%.
    8
    权利要求:
    Claims (1)
    [1]
    image 1
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    同族专利:
    公开号 | 公开日
    ES2609671B2|2017-10-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CN102533406A|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|2015-05-27|2016-12-07|서울대학교산학협력단|Membranes for Heavy Metal Absorption and Method of Manufacturing The Same|
    法律状态:
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    申请号 | 申请日 | 专利标题
    ES201730309A|ES2609671B2|2017-03-09|2017-03-09|Dispersion of graphene in an ionic liquid whose viscosity increases with temperature.|ES201730309A| ES2609671B2|2017-03-09|2017-03-09|Dispersion of graphene in an ionic liquid whose viscosity increases with temperature.|
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