Organic phase-change microcapsule with high coating rate, high thermal conductivity and high thermal cycling stability, and preparation method thereof

The invention provides an organic phase-change microcapsule with high coating rate, high thermal conductivity and high thermal cycling stability, and a preparation method thereof, and relates to the field of phase-change microcapsule materials. According to the organic phase-change microcapsule, a dispersant aqueous solution, methyl methacrylate, a cross-linking agent, an initiator, modified silicon nitride and a C14-C25 straight-chain alkane are directly mixed uniformly, and are subjected to reaction polymerization, and by adjusting the reaction conditions and dosage and uniformly grafting the modified silicon nitride on the surface of the organic shell, the heat-conducting property of the organic shell is improved, and finally the purpose of improving the thermal property of the microcapsule is achieved. The heat conductivity of the prepared microcapsule reaches 4.80 W/m.K, the phase change enthalpy value is larger than or equal to 210 J/g, the phase change enthalpy value is larger than or equal to 200 J/g