Research on proportion and thermal storage property of the shape stabilized fatty acid

In the paper, four kinds of fatty acid binary mixtures and liquid paraffin and lauric acid binary mixture were prepared. Fatty acid binary mixtures were made of capric acid and myristic acid, lauric acid, palmitic acid and stearic acid. High-density polyethylene was used as supporting material to prepare the shape-stabilized phase change materials. The 25 kinds of shape stabilized phase change materiasl samples were prepared by adding fatty acid mixtures to high density polyethylene according to the mass addition ratios of 50%, 60%, 70%, 80% and 90%.The phase change temperatures, the phase change latent heats, the uniformity and stability of the 25 kinds of shape-stabilized phase change materials were studied experimentally by using differential scanning calorimeter(DSC), the aim was to find suitable phase change materials for phase change wall energy storage. The results showed that the phase change temperatures and the phase change latent heats were related to the components and contents of fatty acids. The optimum content of fatty acid in the shape stabilized phase change materials was 70%. The homogeneity and stability of the shape stabilized fatty acid phase change materials were better, and they are suitable for use in phase change wall. The results in this paper can provide references and basis for the application of fatty acid phase change materials in the wall.