A kind of porous medium composite phase change material and its preparation method and application
A technology of composite phase change materials and porous media, which is applied in the field of porous media composite phase change materials and its preparation, can solve the problems of composite phase change materials such as leakage and setting performance, improve latent heat energy and energy storage performance, avoid leakage problems, The effect of improving durability
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Embodiment 1
[0041] A preparation method of porous media composite phase change material:
[0042] Step 1: Take 4.3g of Span 80 and 5.7g of Tween 80 and stir at 250r / min for 15min to obtain a mixed emulsifier; heat the mixed emulsifier to 35°C, add 10g of molten n-octadecane dropwise, and add dropwise Continue to stir at constant temperature for 10 minutes after completion, then dropwise add 80 g of deionized water, increase the speed to 450 r / min at the same time, continue to stir at constant temperature for 30 minutes after the dropwise addition, to obtain n-octadecane microemulsion;
[0043] Step 2: Get 4g of the n-octadecane microemulsion and 0.6g of diatomaceous earth in a three-necked flask, vacuumize, stir and impregnate at 150r / min for 30min under the condition of -0.1KPa, release the vacuum, pour the three-necked flask Add 2 g of absolute ethanol to the mixture, continue to stir for 3 minutes, filter with suction, rinse with hot water at 35° C. for 4 times, and place at room tempe...
Embodiment 2
[0050] A preparation method of porous media composite phase change material:
[0051] Step 1: Take 2.0g of Span 85 and 3.0g of Tween 80, stir at 200r / min for 20min to obtain a mixed emulsifier; heat the mixed emulsifier to 35°C, add 12.5g of molten n-hexadecane dropwise, and simultaneously Increase the rotational speed to 500r / min, continue to stir at a constant temperature for 10min after the dropwise addition, then add 35g of deionized water dropwise, and continue to stir at a constant temperature for 30min after the dropwise addition to obtain n-hexadecane microemulsion;
[0052] Step 2: Take 3 g of the n-hexadecane microemulsion and 2 g of diatomaceous earth in a three-necked flask, vacuumize, stir and impregnate at 100 r / min for 60 min under the condition of -0.3KPa, release the vacuum, and pour the mixture into the three-necked flask Add 1.5 g of absolute ethanol, continue to stir for 2 min, filter with suction, rinse twice with hot water at 40° C., and place at room tem...
Embodiment 3
[0055] A preparation method of porous media composite phase change material:
[0056] Step 1: Take 6.0g of Span 65 and 4.0g of Tween 60 and stir at 300r / min for 10min to obtain a mixed emulsifier; heat the mixed emulsifier to 35°C, add 2g of molten n-eicosane dropwise, and add dropwise Continue to stir at constant temperature for 10 minutes after completion, then add 2.5 g of deionized water dropwise, and increase the rotation speed to 400 r / min at the same time, continue to stir at constant temperature for 30 minutes after the addition, to obtain n-eicosane microemulsion;
[0057] Step 2. Take 9 g of the n-eicosane microemulsion and 1 g of halloysite in a three-necked flask, vacuumize, stir and impregnate at 130 r / min for 40 min under the condition of -0.2KPa, release the vacuum, and pour the mixture into the three-necked flask Add 3.6 g of absolute ethanol, continue to stir for 5 min, filter with suction, rinse with hot water at 38° C. for 3 times, and place at room temperat...
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