Research of Preparation Process of Amorphous Composite Phase Change Material by Orthogonal Test Method

摘要

To prepare shape-stabilized phase change material applicable in digester insulation, firstly to prepare composite phase change material by sol-gel method. Shape material was obtained by sol-gel with TEOS, in which phase change material was lauric acid/cetyl alcohol binary eutectic phase change materials. T he result s showed that the descending order of the influencing factors:ester-PCM ratio, ester -water ratio, pH, the react ion temperature, aging temperature. The best technology is:the ester -water ratio1:8, ester-PCM ratio1:2.3, pH3, aging temperature 85°C, the react ion temperature 60°C. When composite phase change material was prepared with the best technology, phase transition temperature of composite phase change material is 34°C, phase change enthalpy can reach 122.4J/g when the mass fraction of phase change material is 64%.