Nano TiO2-containing cellulose-based low-temperature phase change energy storage microcapsule and preparation method thereof
A cellulose-based, low-temperature phase change technology, applied in microcapsule preparations, microsphere preparation, chemical instruments and methods, etc., can solve the problems of high rigidity, easily broken core material, and poor mechanical properties of thermosetting resins, and achieve excellent performance. , The effect of good film formation and good toughness
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Embodiment 1
[0034] Add the compound emulsifier formed by mixing 3g of Span80 and 2g of Tween80 into a solution consisting of 2.5g of ethylene glycol and 25mL of distilled water, heat and stir in a 40°C water bath to form a uniform solution 1; raise the temperature to 50°C, and adjust the stirring speed to 2000r / min, add 5mL of n-dodecane dropwise into solution 1 at a rate of 2mL / min, and continue stirring for 15min after complete addition to form a stable O / W emulsion 2; dissolve 2g of carboxymethyl cellulose in 100mL Form solution 3 in distilled water; add emulsion 2, 6g of tetrabutyl titanate and 25mg of γ-aminopropylethoxysilane into solution 3, place it in a water bath at 80°C for 3 hours, and then age at room temperature for 6 hours , placed in a vacuum freeze dryer at 10Pa and -10°C for 30 hours, thawed, filtered, and dried in turn to obtain nano-TiO 2 Cellulose-based low-temperature phase-change energy storage microcapsules. The average particle diameter of the microcapsule is 8 μ...
Embodiment 2
[0036]Add the compound emulsifier formed by mixing 1.5g Span80 and 0.5g Tween80 into a solution consisting of 1.5g ethylene glycol and 15mL distilled water, heat and stir in a water bath at 40°C to form a uniform solution 1; Adjust to 4000r / min, add 4mL n-dodecane and 1mL n-tetradecane dropwise into solution 1 at a rate of 2mL / min, and continue stirring for 15min after complete addition to form a stable O / W emulsion 2; Carboxymethyl cellulose was dissolved in 100 mL of distilled water to form solution three; emulsion two, 10 g of tetrabutyl titanate and 50 mg of N-(β-aminoethyl)-γ-aminopropyldimethoxysilane were added to solution three , placed in a water bath at 80°C for heating for 3 hours, then aged at room temperature for 6 hours, placed in a vacuum freeze dryer at 10 Pa and -10°C for 24 hours, thawed, filtered, and dried in sequence to obtain nano-TiO 2 Cellulose-based low-temperature phase-change energy storage microcapsules. The average particle diameter of the microca...
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