Acrylic polymer/fatty acid cross-linked solid-solid phase change material and preparation method thereof
A technology of acrylic and phase change materials, applied in the field of phase change energy storage, can solve the problems of low phase change enthalpy, complicated preparation process, and unfavorable environmental protection of solid-solid phase change materials, and achieve easy large-scale industrial production and preparation The effect of simple method, excellent thermal stability and shape retention ability
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Embodiment 1
[0030] First, 2 g of ethylene-acrylic acid copolymer and 8 g of stearic acid were heated to a molten state at 80° C. and mechanically stirred for 30 minutes. After the ethylene-acrylic acid copolymer and stearic acid are uniformly mixed, 0.2 g of ZnO is added, the temperature is raised to 115° C., and the mixture is continuously stirred until the color of the mixture changes from white to yellow. Finally, the above-mentioned yellow molten mixture was poured into a stainless steel mold, and the solid-solid phase change material was obtained after cooling to room temperature.
[0031] The solid-solid phase change material obtained in this example is tested by DSC to have a melting enthalpy of 127.0 J / g, a melting temperature of 52.5° C.; a crystallization enthalpy of 119.3 J / g, and a crystallization temperature of 45.3° C.
Embodiment 2
[0033] First, 2 g of ethylene-acrylic acid copolymer and 8 g of stearic acid were heated to a molten state at 80° C. and mechanically stirred for 30 minutes. After the ethylene-acrylic acid copolymer and stearic acid are uniformly mixed, 0.3 g of ZnO is added, the temperature is raised to 115° C., and the mixture is continuously stirred until the color of the mixture changes from white to yellow. Finally, the above-mentioned yellow molten mixture was poured into a stainless steel mold, and the solid-solid phase change material was obtained after cooling to room temperature.
[0034] The solid-solid phase change material obtained in this example was tested by DSC to have a melting enthalpy of 89.1 J / g, a melting temperature of 49.1° C.; a crystallization enthalpy of 85.7 J / g, and a crystallization temperature of 38.5° C.
[0035] figure 1 It is a scanning electron microscope picture of the solid-solid phase change material in Example 2 under different magnifications, which sho...
Embodiment 3
[0040] First, 2 g of ethylene-acrylic acid copolymer and 8 g of stearic acid were heated to a molten state at 80° C. and mechanically stirred for 30 minutes. After the ethylene-acrylic acid copolymer and stearic acid are uniformly mixed, 0.4 g of ZnO is added, the temperature is raised to 115° C., and the mixture is continuously stirred until the color of the mixture changes from white to yellow. Finally, the above-mentioned yellow molten mixture was poured into a stainless steel mold, and the solid-solid phase change material was obtained after cooling to room temperature.
[0041] The solid-solid phase change material obtained in this example is tested by DSC to have a melting enthalpy of 54.9 J / g, a melting temperature of 49.9° C.; a crystallization enthalpy of 52.2 J / g, and a crystallization temperature of 39.9° C.
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