Olefin composite shaping phase-change material and preparation thereof
A technology of shape-setting phase change materials and paraffins, which is applied in heat exchange materials, chemical instruments and methods, etc., can solve the problem of high proportion of support materials and additives, low percentage of main heat storage materials, and reduced phase change enthalpy, etc. problem, to achieve the effect of good application performance, low preparation cost, and high phase change enthalpy
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[0037] Example 1
[0038] Take 54 whose melting point is 54-56℃ and phase transition enthalpy is 187.29J / g # 90.00g of solid paraffin wax, melted in a beaker, add (1,3;2,4)-bis(4-methylbenzylidene)sorbitol (MDBS) to make the mass percentage 0.5%, heat and stir to completely dissolve, After the mixture is clear and transparent, pour it into an iron mold with a width of 3 cm, a thickness of 1 cm and a height of 15 cm, and let it cool down to prepare a paraffin-based composite shape-setting phase change material. ((1,3;2,4)-bis(4-methylbenzylidene)sorbitol is a dicondensate formed by sorbitol and 4-methylbenzaldehyde)
[0039] The leakage rate of the paraffin-based composite shaped phase change material prepared in this example was 4.23%. Its phase change enthalpy is 192.17J / g.
Example Embodiment
[0040] Example 2
[0041] Take 54 whose melting point is 54-56℃ and phase transition enthalpy is 187.29J / g #90.00g solid paraffin wax, melt in a beaker, add MDBS to make the mass percentage 1%, heat and stir to completely dissolve, after the mixture is clear and transparent, pour it into an iron mold with a width of 3cm, a thickness of 1cm and a height of 15cm, and let it cool out , Prepared paraffin-like composite shape-stable phase change material.
[0042] The leakage rate of the paraffin-based composite shaped phase change material prepared in this embodiment is 2.56%. Its phase change enthalpy is 190.25J / g.
Example Embodiment
[0043] Example 3
[0044] Take 54 whose melting point is 54-56℃ and phase transition enthalpy is 187.29J / g # 90.00g solid paraffin wax, melt in a beaker, add MDBS to make the mass percentage 3%, heat and stir to completely dissolve, after the mixture is clear and transparent, pour it into an iron mold with a width of 3 cm, a thickness of 1 cm, and a height of 15 cm, and let it cool out , Prepared paraffin-like composite shape-stable phase change material.
[0045] The leakage rate of the paraffin-based composite shaped phase change material prepared in this example was 1.75%. Its phase change enthalpy is 192.74J / g.
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