A kind of multifunctional phase change material microcapsule and preparation method thereof
A technology of phase change materials and microcapsules, which is applied in the direction of analysis materials, material resistance, heat exchange materials, etc., can solve the problems of phase change materials leakage, pollution, environmental pollution, etc., achieve good latent heat energy storage, wide application prospects, The effect of improving the utilization rate
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Embodiment 1
[0031] First, add 2.4g of n-eicosane, 1.578g of cetyltrimethylammonium bromide and 50mL of deionized water into a 250mL three-necked flask, and emulsify in an oil bath at 60°C at a mechanical stirring rate of 300rpm for 1h . Quickly drop 30mL of copper sulfate solution with a concentration of 0.5mol / L into the three-necked flask. The glucose solution was added dropwise into a three-necked flask, reacted for 5 hours, stopped stirring, matured for 6-8 hours, washed the product with deionized water for 3-5 times, then filtered and dried to obtain multifunctional phase change material microcapsules. The scanning electron micrograph of the multifunctional phase change material microcapsule prepared by this embodiment is as follows: figure 1 As shown, it can be found that the particle size of the prepared multifunctional phase change material microcapsules is between 0.5 μm and 5 μm, and the particle size is uniform. The transmission electron micrograph of the multifunctional phas...
Embodiment 2
[0033] First, add 3.2g of n-eicosane, 1.578g of cetyltrimethylammonium bromide and 50mL of water into a 250mL three-neck flask, and emulsify in an oil bath at 60°C at a mechanical stirring rate of 300rpm for 1h. Quickly drop 30mL of copper sulfate solution with a concentration of 0.5mol / L into the three-necked flask. Add the glucose solution drop by drop into the three-necked flask, react for 5 hours, stop stirring, mature for 6-8 hours, rinse the product with deionized water for 3-5 times, then filter and dry to obtain multifunctional phase-change material microcapsules with a dense surface Smooth, with a "core-shell" structure. Through the differential scanning calorimetry test, the phase transition temperature of the microcapsules is 32.1°C and 38.7°C, and the phase transition enthalpy is 147.9-148.5J / g; in the photodegradation experiment, after 140min sunlight, the degradation rate of malachite green is 87.56%; through the gas sensitivity test, the results show that the m...
Embodiment 3
[0035] First, 2.4g of n-eicosane, 1.578g of cetyltrimethylammonium bromide and 50mL of water were added into a 250mL three-neck flask, and emulsified in an oil bath at 60°C at a mechanical stirring rate of 300rpm for 1h. Quickly drop 30mL of copper acetate solution with a concentration of 0.5mol / L into the three-necked flask. Add the glucose solution drop by drop into the three-necked flask, react for 5 hours, stop stirring, mature for 6-8 hours, rinse the product with deionized water for 3-5 times, then filter and dry to obtain multifunctional phase-change material microcapsules with a dense surface Smooth, with a "core-shell" structure. Through the differential scanning calorimetry test, the phase transition temperature of the microcapsules is 32.8°C and 39.2°C, and the phase transition enthalpy is 154.9-155.3J / g; in the photodegradation experiment, after 140min sunlight, the degradation rate of malachite green is 80.46%; through the gas sensitivity test, the results show t...
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