Phase-transition energy-storage microcapsules and their preparing process
A phase-change energy storage and phase-change material technology, applied in the field of phase-change energy storage materials and their preparation, can solve the problems of inability to use for a long time, poor chemical stability, poor heat resistance of organic polymers, etc., and achieve easy industrialization and promotion. , the effect of easy industrial production and simple preparation process
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Example Embodiment
[0027] Example 1:
[0028] a) Emulsification of phase change materials
[0029] Dissolve 1.5g CTAB in 30mL hot water at 50°C, add 8mL 25# phase change paraffin and 0.5g n-pentanol after it is completely dissolved, emulsify for 2min under stirring conditions of 12000 rpm to obtain a milky white emulsion.
[0030] b) Prepolymerization of the cyst wall
[0031] 5 mL of industrial water glass was added to 30 mL of distilled water, and after dissolution, 1.5 mL of 1:1 hydrochloric acid was added under stirring conditions to obtain a water glass prepolymer.
[0032] c) Coating of phase change materials
[0033] Add the emulsion obtained in a) slowly to the water glass prepolymer b), and then slowly add 4mL5mol / L NH dropwise 4 HCO 3 The solution was placed in a water bath at 50°C and stirred for 3 hours. After filtering and washing, phase change energy storage microcapsules are obtained.
[0034] The particle size distribution of the prepared microcapsule phase change energy storage mate...
Example Embodiment
[0035] Example 2:
[0036] The phase change material uses 8 mL of dodecanol, the phase change temperature of which is 24°C, and the other preparation process steps and conditions are the same as in Example 1.
[0037] D of the prepared phase change energy storage microcapsules 50 =8.68μm, the phase change enthalpy of the microcapsule is 116.49J / g, and the phase change enthalpy of dodecanol is 216.80J / g, so the content of the phase change energy storage material is 53.7%.
Example Embodiment
[0038] Example 3:
[0039] a) Emulsification of phase change materials
[0040] Dissolve 3g CTAB in 30mL hot water at 50°C, add 11mL 25# phase change paraffin and 1g n-pentanol after complete dissolution, emulsify for 2min under stirring conditions of 12000 rpm to obtain a milky white emulsion.
[0041] b) Prepolymerization of the cyst wall
[0042] 5 mL of industrial water glass was added to 30 mL of distilled water, and after dissolution, 1.1 mL of 1:1 hydrochloric acid was added under stirring conditions to obtain a water glass prepolymer.
[0043] c) Coating of phase change materials
[0044] Slowly add the emulsion obtained in a) to the water glass prepolymer b), and then slowly add 10mL5mol / L NH dropwise 4 HCO 3 The solution was placed in a 50°C water bath and stirred for 5 hours. After filtering and washing, phase change energy storage microcapsules are obtained.
[0045] D of the prepared phase change energy storage microcapsules 50 = 6.06μm, the phase change enthalpy of t...
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