A medium-temperature shape-setting phase-change material with high thermal conductivity and its preparation method
A shape-fixed phase change, high thermal conductivity technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of time and space differences, achieve improved performance, high phase change latent heat and thermal conductivity, and expand the scope of application Effect
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Embodiment 1
[0019] 1) Preparation of suspension: Take 0.1g of expanded graphite, mix it with 40mL of absolute ethanol in a round bottom flask, and ultrasonically treat it for 1 hour to break the expanded graphite into nano-expanded graphite flakes and obtain a nano-expanded graphite flake / absolute ethanol mixture ; Add 2.0g erythritol, 0.7g polyethylene glycol 10000 and 60mL absolute ethanol to the above mixture, put it in a water bath at 75°C, reflux and stir to completely dissolve the erythritol and polyethylene glycol, then stop Heat, stir vigorously, and let the system cool down to room temperature to obtain a stable suspension.
[0020] 2) Cooling of the suspension: Add 0.51 g of aniline and 2 mL of concentrated hydrochloric acid to the suspension, stir and mix evenly, then transfer the mixture into an ice-water bath, stir vigorously and lower the temperature of the mixture to 0-5°C.
[0021] 3) Aniline polymerization: 2.658 g of benzoyl peroxide was added to the above mixture at 0-5...
Embodiment 2
[0026] 1) Preparation of suspension: Take 0.64g of expanded graphite, mix it with 40mL of absolute ethanol in a round-bottomed flask, and ultrasonicate for 3 hours to break the expanded graphite into nano-expanded graphite flakes and obtain a nano-expanded graphite flake / absolute ethanol mixture ; Add 2.0g erythritol, 0.7g polyethylene glycol 10000 and 60mL absolute ethanol to the above mixture, put it in a water bath at 75°C, reflux and stir to completely dissolve the erythritol and polyethylene glycol, then stop Heat, stir vigorously, and let the system cool down to room temperature to obtain a stable suspension.
[0027]2) Cooling of the suspension: Add 0.51 g of aniline and 2 mL of concentrated hydrochloric acid to the suspension, stir and mix evenly, then transfer the mixture into an ice-water bath, stir vigorously and lower the temperature of the mixture to 0-5°C.
[0028] 3) Aniline polymerization: 2.658 g of benzoyl peroxide was added to the above mixture at 0-5°C to i...
Embodiment 3
[0033] 1) Preparation of suspension: Take 0.05g of graphene, mix it with 40mL of absolute ethanol in a round bottom flask, and sonicate for 1 hour to obtain a graphene / absolute ethanol mixture; add 2.0g of erythritol to the above mixture, Put 1g of polyethylene glycol 10000 and 40mL of absolute ethanol in a water bath at 70°C, reflux and stir to completely dissolve erythrose and polyethylene glycol, stop heating, stir vigorously, and let the system cool down to room temperature to obtain a stable suspension .
[0034] 2) Cooling of the suspension: Add 0.35 g of aniline and 8 mL of concentrated hydrochloric acid to the suspension, stir and mix evenly, then transfer the mixture into a cold water bath, stir vigorously and lower the temperature of the mixture to 5-15 °C.
[0035] 3) Aniline polymerization: Add 2.738 g of benzoyl peroxide to the above mixture at 5-15 °C to initiate the polymerization of aniline, and allow the mixture to heat up naturally for 24 hours.
[0036] 4) ...
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