Composite phase change material for clean heating and preparation method thereof
A composite phase change material and heating technology, applied in the field of phase change material and its preparation, can solve the problems of high thermal conductivity, restricting application, losing the value of heat storage, etc.
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Embodiment 1
[0016] (1) The raw materials are based on the mass ratio of Mg(NO 3 ) 2 ·6H 2 O accounts for 85 parts, CH 3 COONa·3H 2 O accounts for 10 parts, nucleating agent Na 2 SiO 3 9H 2 O accounted for 5 parts mixed, grinded in a mortar and mixed evenly;
[0017] (2) Heat and melt the mixture in step (1) in a constant temperature bath at 80-100°C, 500r. min -1 Stir magnetically for 2 hours to obtain a clear and transparent molten composite phase change material;
[0018] (3) Cool to room temperature to obtain magnesium nitrate hexahydrate-sodium acetate composite phase change material.
Embodiment 2
[0020] (1) The raw materials are based on the mass ratio of Mg(NO 3 ) 2 ·6H 2 O accounts for 90 parts, CH 3 CH 2 COONa·H 2 O accounts for 8 parts, the nucleating agent Na 2 SiO 3 9H 2 O accounted for 2 parts mixed, grinded in a mortar and mixed evenly;
[0021] (2) Heat and melt the mixture in step (1) in a constant temperature bath at 90°C, 800r. min -1 Stir magnetically for 2.5 hours to obtain a clear and transparent molten composite phase change material;
[0022] (3) Cool to room temperature to obtain magnesium nitrate hexahydrate-sodium propionate composite phase change material.
Embodiment 3
[0024] (1) The raw materials are based on the mass ratio of Mg(NO 3 ) 2 ·6H 2 O accounts for 85 parts, CH 3 COONa·3H 2 O accounts for 10 parts, nucleating agent Na 2 HPO 4 12H 2 O accounted for 5 parts mixed, grinded in a mortar and mixed evenly;
[0025] (2) Heat and melt the mixture in step (1) in a constant temperature bath at 98°C, 500r. min -1 Stir magnetically for 2 hours to obtain a clear and transparent molten composite phase change material;
[0026] (3) Cool to room temperature to obtain magnesium nitrate hexahydrate-sodium acetate composite phase change material.
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