Starch and expanded graphite phase-change composite material and method for preparing same
A phase change composite material and expanded graphite technology are applied in the field of starch expanded graphite phase change composite materials and their preparation, and can solve the problems of thin microcapsule shells, poor stability of microcapsule phase change composites, and microcapsule phase change. The composite material shell is broken and other problems, to achieve the effect of good encapsulation, excellent structural stability, and excellent thermal conductivity.
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[0030] Example 1
[0031] (1) Weigh 1g of starch and disperse it in 100ml of deionized water, and set the temperature of the thermostatic magnetic stirrer at 90°C. Heat the starch suspension under a magnetic stirrer. After it boils, continue boiling for 15 minutes.
[0032] (2) Transfer the boiling starch suspension to a high-speed shearing machine. Subsequently, 0.5-1 g of expanded graphite was immediately added to the boiling starch suspension, and the mixed suspension of starch expanded graphite was vigorously stirred at 10000 rpm under a high-speed shearing machine, and a fully dispersed suspension was formed after stirring for 15 minutes.
[0033] (3) Place 9g of paraffin wax in a vacuum drying oven at 70°C and heat until it melts.
[0034] (4) Add the molten paraffin to the suspension in (2), and stir vigorously at 10000rpm under a high-speed shear for 15min.
[0035] (5) After filtering the sample to remove its ionized water. Place in an oven at 35°C to dry, solidify the dropl...
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[0036] Example 2
[0037] (1) Weigh 1g of starch and disperse it in 100ml of deionized water, and set the temperature of the thermostatic magnetic stirrer at 90°C. Heat the starch suspension under a magnetic stirrer. After it boils, continue boiling for 15 minutes.
[0038] (2) Transfer the boiling starch suspension to a high-speed shearing machine. Subsequently, 0.5 g of expanded graphite was immediately added to the boiling starch suspension, and the mixed suspension of starch expanded graphite was vigorously stirred at a speed of 10000 rpm under a high-speed shearing machine, and a fully dispersed suspension was formed after stirring for 15 minutes.
[0039] (3) Put 4.45g of paraffin wax in a vacuum drying oven at 70°C and heat it until it melts.
[0040] (4) Add the molten paraffin to the suspension in (2), and stir vigorously at 10000rpm under a high-speed shear for 15min.
[0041] (5) After filtering the sample to remove its ionized water. Place in an oven at 35°C to dry, solid...
Example Embodiment
[0043] Example 3
[0044] (1) Weigh 1g of starch and disperse it in 100ml of deionized water, and set the temperature of the thermostatic magnetic stirrer at 90°C. Heat the starch suspension under a magnetic stirrer, and continue boiling for 15 minutes after it boils.
[0045] (2) Transfer the boiling starch suspension to a high-speed shearing machine. Subsequently, 0.5 g of expanded graphite was immediately added to the boiling starch suspension, and the mixed suspension of starch expanded graphite was vigorously stirred at a speed of 10000 rpm under a high-speed shearing machine, and a fully dispersed suspension was formed after stirring for 15 minutes.
[0046] (3) Put 2.97g of paraffin wax in a 70°C vacuum drying oven and heat until it melts. The scanning electron micrographs of starch, expanded graphite, paraffin and phase change composite materials are shown in figure 2 in. Figure A shows the dispersed starch expanded graphite phase change composite material. It can be seen...
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