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<p>Transitioning from vapor-compression cooling systems to more eco-friendly technologies is a pivotal move in addressing climate change. Barocaloric refrigeration stands out as a viable alternative due to the use of solid refrigerants and better efficiency, once it eliminates the use of greenhouse gases and reduces energy consumption. Among various material classes that exhibit excellent barocaloric performance, polymers are particularly noteworthy due to their giant and colossal barocaloric effects, widespread availability, and in some instances, low ecological footprint. However, these polymeric materials often face challenges in terms of thermal conductivity—a critical property for materials used in high heat transfer applications. In our study, we utilized flexible PVC (PVC<sub>f</sub>), sourced from industrial residues, to fabricate composites of Natural Graphite (NG) and PVC<sub>f</sub> (NG/PVC<sub>f</sub>) using standard processing methods. This approach allowed us to improve its thermal conductivity and assess the barocaloric performance. The results revealed a remarkable improvement in thermal conductivity—up to 500%—in the NG/PVC<sub>f</sub> composites compared to pure PVC<sub>f</sub>, with only a ~ 22% reduction in the barocaloric effect. Our findings suggest exciting prospects for the use of industrial waste in the development of high-performance recycled materials, such as refrigerants for future solid-state cooling devices.</p> Graphical abstract <p></p>

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Composites of recycled PVC with natural graphite for improved heat transfer applications: a barocaloric effect study

  • 期刊论文

  • 发表日期：

    2025年5月28日

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  • Erik Oda Usuda,
  • William Imamura,
  • Flavio Clareth Colman,
  • Augusto Dias Siqueira,
  • Gabriel Fornazaro,
  • Ricardo Alexandre Galdino da Silva,
  • Alexandre Magnus Gomes Carvalho,
  • Jean Rodrigo Bocca,
  • Cleber Santiago Alves,
  • Silvia Luciana Fávaro

摘要

Transitioning from vapor-compression cooling systems to more eco-friendly technologies is a pivotal move in addressing climate change. Barocaloric refrigeration stands out as a viable alternative due to the use of solid refrigerants and better efficiency, once it eliminates the use of greenhouse gases and reduces energy consumption. Among various material classes that exhibit excellent barocaloric performance, polymers are particularly noteworthy due to their giant and colossal barocaloric effects, widespread availability, and in some instances, low ecological footprint. However, these polymeric materials often face challenges in terms of thermal conductivity—a critical property for materials used in high heat transfer applications. In our study, we utilized flexible PVC (PVCf), sourced from industrial residues, to fabricate composites of Natural Graphite (NG) and PVCf (NG/PVCf) using standard processing methods. This approach allowed us to improve its thermal conductivity and assess the barocaloric performance. The results revealed a remarkable improvement in thermal conductivity—up to 500%—in the NG/PVCf composites compared to pure PVCf, with only a ~ 22% reduction in the barocaloric effect. Our findings suggest exciting prospects for the use of industrial waste in the development of high-performance recycled materials, such as refrigerants for future solid-state cooling devices.

Graphical abstract