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US 8,940,181 B2Granted
Emulsions of heat transfer fluids including nanodroplets to enhance thermal conductivities of the fluids
AssigneeUniversity of Maryland, College Park
InventorsBao Yang, Zenghu Han
Life of this patent
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Abstract
A heat transfer fluid emulsion includes a heat transfer fluid, and liquid droplets dispersed within the heat transfer fluid, where the liquid droplets are substantially immiscible with respect to the heat transfer fluid and have dimensions that are no greater than about 100 nanometers. In addition, the thermal conductivity of the heat transfer fluid emulsion is greater than the thermal conductivity of the heat transfer fluid.
Claims10
A heat transfer fluid emulsion comprising:
- (I) a heat transfer fluid comprising a liquid fluorocarbon compound;
- (II) liquid droplets dispersed within the heat transfer fluid, wherein the liquid droplets consist of a metal or a metal alloy that is in a liquid state, wherein the liquid droplets are substantially immiscible with respect to the heat transfer fluid, and have dimensions that are no greater than about 100 nanometers;
- and
- (III) an amphiphilic surfactant adsorbed around the liquid droplets to enhance size and stability of the liquid droplets within the heat transfer fluid, wherein said amphiphilic surfactant comprises fluorinated polyoxyethylene alkyl ether.
1 more element
A method of forming a heat transfer fluid emulsion comprising:
- providing a heat transfer fluid comprising a liquid fluorocarbon compound;
- combining the heat transfer fluid with a liquid that is substantially immiscible with respect to the heat transfer fluid and an amphiphilic surfactant, wherein the amphiphilic surfactant comprises fluorinated polyoxyethylene alkyl ether;
- and
- mixing the liquid and the surfactant in the heat transfer fluid to form an emulsion comprising liquid droplets dispersed within the heat transfer fluid, wherein the liquid droplets consist of a metal or a metal alloy that is in a liquid state,
- wherein the liquid droplets have dimensions that are no greater than about 100 nanometers, and the amphiphilic surfactant is absorbed around the liquid droplets to enhance size and stability of the liquid droplets within the heat transfer fluid.
2 more elements
Dependencies are inferred from the claim text.