William Imamura*, Flavio Clareth Colman, Gustavo Hannoun Giudai, Erik Oda Usuda, Cleber Santiago Alves, Silvia Luciana Favaro, Rita de Cássia Colman Simões, Antonio Medina Neto, Lucio Cardozo-Filho, Eduardo Radovanovic, Jean Rodrigo Bocca and Alexandre Magnus Gomes Carvalho,
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Colossal Barocaloric Effect in Fatty Acids: Eco-Friendly Refrigerants for Use in Alternative Cooling Technologies
Most current cooling systems are based on mechanical compression and expansion processes that use halocarbons as the primary refrigerants. These refrigerants contribute to global warming, leading the scientific community to research and develop eco-friendly technologies. One of these alternative technologies is based on the barocaloric effect. Promising materials for barocaloric applications are categorized into different classes, including polymers, intermetallic compounds, plastic crystals, and n-alkanes. In this study, we reported large to colossal values of the barocaloric effect for a new class of promising material: fatty acids. The myristic, palmitic, and stearic acids were investigated by direct measurements. The reversibility of the phenomena was investigated, both near and far from the liquid–solid phase transition. Furthermore, the fatty acids reached large values of the barocaloric effect in solid–solid processes and colossal values in liquid–solid transitions. Thus, it results in a broad range of usable temperatures.
期刊介绍:
The Journal of Physical Chemistry A/B/C is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, and chemical physicists.