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Management of discarded tires is a compelling environmental issue worldwide.Although several approaches have been developed to recycle waste tire rubbers,their application in solid-state cooling is still unexplored. Considering thehigh barocaloric potential verified for elastomers, the use of waste tirerubber (WTR) as refrigerant in solid-state cooling devices is very promising.Here, we investigated the barocaloric effects in WTR and polymer blends made ofvulcanized natural rubber (VNR) and WTR, in order to evaluate its feasibilityfor solid-state cooling technologies. The adiabatic temperature change and theisothermal entropy change reach giant values, as well as the performanceparameters, being comparable or even better than most barocaloric materials inliterature. Moreover, pure WTR and WTR-based samples also present a fasterthermal exchange than VNR, consisting in an additional advantage of using thesediscarded materials. Thus, the present findings evidence the encouragingperspectives of employing waste rubbers in solid-state cooling based onbarocaloric effect, contributing in both the recycling of polymers and thesustainable energy technology field.

A Novel Option for Waste Tire Rubber Reutilization: Refrigerant in Solid-State Cooling Devices