Phase change energy storage microcapsule with wall material being TiO2 and preparation method of phase change energy storage microcapsule
A technology of phase change energy storage and microcapsules, which is applied in the field of preparation of phase change energy storage microcapsules, can solve the problem of high toxicity, achieve the effect of small particle size, enhanced thermal conductivity, and improved heat storage performance
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Embodiment 1
[0025] 1) Weigh 2.0g of Span-80 and 2.4g of cetyltrimethylammonium bromide and add them to 160g of absolute ethanol, and disperse evenly under stirring as the water phase; 2) Weigh 8g of octadecane and heat up to After melting, add it to the above water phase, and emulsify it at a speed of 650 rpm for 35 minutes to obtain an emulsion; 3) weigh 10 g of tetrabutyl titanate and add it to the above emulsion, and stir it at a speed of 500 rpm for 30 minutes; 4 ) After weighing 40g of absolute ethanol and 2.0g of deionized water and mixing them evenly, they were added dropwise to the solution obtained in step 3) at a speed of 0.3ml / min, and continued to stir for 4h at a speed of 400rpm to obtain a white turbid solution; 5) Filter and dry the obtained white turbid solution to obtain TiO 2 Coated phase change energy storage microcapsules.
[0026] The average particle size of the prepared phase change energy storage microcapsules is 2 μm, see attached figure 1 . Depend on figure ...
Embodiment 2
[0028] 1) Weigh 1.8g of Span-80 and 2.6g of cetyltrimethylammonium bromide and add them to 160g of absolute ethanol, and disperse evenly under stirring, as the water phase; 2) Weigh 8g of octadecane and heat up to After melting, add to the above water phase, and emulsify at 680rpm for 35min to obtain an emulsion; 3) Weigh 8g of tetraisopropyl titanate into the above emulsion, and stir at 550rpm for 30min; 4) Weigh 40g of absolute ethanol and 1.8g of deionized water and mix them evenly, then add them dropwise to the solution obtained in step 3) at a speed of 0.2ml / min, and continue to stir for 4h at a speed of 400rpm to obtain a white turbid solution ; 5) the obtained white turbid solution is filtered and dried to obtain TiO 2 Coated phase change microcapsules. Its average particle size is 2 μm; the average phase change enthalpy value is 72J / g.
Embodiment 3
[0030] 1) Weigh 2.0g of Span-80 and 2.0g of sodium lauryl sulfate and add them to 160g of absolute ethanol, and disperse evenly under stirring as the water phase; 2) Weigh 8g of octadecane and heat it up to melting, then add into the above solution, and emulsified at a speed of 700rpm for 35min to obtain an emulsion; 3) Weigh 10g of tetrabutyl titanate into the above emulsion, and stir at a speed of 500rpm for 30min; 4) Weigh 40g of tetrabutyl titanate After the water ethanol and 2.0g deionized water are mixed evenly, add dropwise to the solution obtained in step 3) at a speed of 0.3ml / min, and continue to stir at a speed of 400rpm for 4h to obtain a white turbid solution; 5) mix the obtained The white turbid solution was filtered and dried to obtain TiO 2 Coated phase change microcapsules. Its average particle size is 3μm; the average phase change enthalpy is 86J / g.
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