Liquid metal composite material used as hydraulic medium and preparation method thereof

The invention discloses a liquid metal composite material used as a hydraulic medium and a preparation method of the liquid metal composite material, and belongs to the technical field of hydraulic media. The liquid metal composite material comprises the following raw materials: liquid metal, wherein the liquid metal is selected from one or more of gallium, indium, tin and zinc; the solid-phase particles are selected from micron-sized or submicron-sized particles of metal oxides, nitrides or carbides; the dispersion stabilizer is selected from one or more of sodium dodecyl sulfate, span-85, polyvinyl alcohol, polyacrylamide and sodium lauryl ethoxylate sulfate; a coupling agent, wherein the coupling agent is selected from methyl siloxane and/or ethyl siloxane; the lubricant is selected from one or more of calcium-based ester, zinc-based ester, glycerol, molybdenum disulfide, graphite and silicone oil. The prepared liquid metal composite material is low in density, small in surface tension and good in wettabil