Abstract
Synthetic saponites were successfully used to prepare phase change materials (PCMs) based on paraffin/synthetic saponite. Paraffin/synthetic saponites PCMs were prepared by a solution intercalation process. The PCMs were characterized by powder X-ray diffraction, FT-IR spectroscopy, thermal analyses and nitrogen adsorption. The thermal properties and the stability of PCMs were measured by DSC analysis and from heating–cooling curves. The results showed that the prepared PCMs have a higher heating rate and a lower cooling speed than paraffin because the heat storage was improved with the synthetic saponite. A one-pot synthesis method for obtaining PCM has been successfully developed in this work. The material thus obtained had better results for heat storage applications.
Highlights
The use of paraffin as a phase change material has many advantages, e.g., low cost, high energy storage density, chemical stability, small changes in volume during the phase change process, etc. [1]
In this study we have investigated a preparation of a phase change materials (PCMs) composite of paraffin using synthetic saponite as a support
Different PCMs based on synthetic saponite/paraffin were correctly prepared, as proven by characterization techniques such as FT-IR spectroscopy and powder X-ray diffraction
Summary
The use of paraffin as a phase change material has many advantages, e.g., low cost, high energy storage density (amount of energy stored per mass unit), chemical stability, small changes in volume during the phase change process, etc. [1]. Clays’ properties make them suitable for use as industrial raw materials in the construction, agricultural, textile, paper, pharmaceutical, ceramic, electrical, nuclear energy, and petroleum industries [7]. Their main advantages are that they are broadly distributed on the Earth’s surface and their low cost; their synthesis is easy and cheap in most cases. Smectite-type clays, bentonites are used as fillers in composites to enhance the properties of the polymeric matrix. Toyota’s work was pioneering in the study of the exfoliation of clay in nylon-6 [9,10,11], and this work made important progress in the study of the engineering properties of smectites [12,13,14]
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