| abstract |
The invention belongs to the technical field of phase change cold storage materials, and discloses an inorganic/organic composite shell nano phase change capsule cold storage fluid and a preparation method thereof. The preparation method is as follows: the metal alkoxide is hydrolyzed and condensed and modified with an organosilicon coupling agent to obtain a modified metal oxide sol; styrene monomer, acrylate comonomer, chain transfer agent, initiator and alkane The core material is made into an oil phase, added to the water phase made of emulsifier and deionized water, and homogeneously emulsified to obtain a fine emulsion; the temperature is raised to 40-80°C for in-situ polymerization for 10-50 minutes, and then the modified metal is added dropwise The oxide sol is reacted to obtain a composite shell nano phase change capsule emulsion; an antifreeze agent is added to the above emulsion and diluted with water to obtain a product. The invention uses metal oxides and organic high polymers as the shell layer, and the obtained product has high thermal conductivity, specific heat capacity and mechanical stability, and can be used as a phase-change cold storage fluid for cold storage air conditioners. |