On the mechanocaloric effect of natural graphite/thermoplastic polyurethane composites
Source abstract
Abstract
Solid-state cooling based on caloric effects is an alternative to traditional vapor-compression refrigeration systems. This technique and the solid-state materials have received great attention in recent decades. For example, the elastomers are promising because they have high values of adiabatic temperature change (ΔTS) and isothermal entropy change (ΔST). However, their thermal conductivity is limited, which is a fundamental property for heat transfer. Hence, in this work, we characterized the mechanocaloric effect in natural graphite/thermoplastic polyurethane (NG/TPU) composites. The pure TPU and its NG/TPU composites were characterized by their thermal and mechanical properties. The NG/TPU composites presented ΔTS = 8.6 K and ΔST = 35 J kg−1 K−1, which correspond to a maximum reduction of 28 and 45% in the ΔTS and ΔST, respectively, when compared to pure TPU, but with an increase of 500% in thermal conductivity. We reported no significant reduction in the ΔTS for the composites after 105 compression cycles. Our findings combine a large mechanocaloric effect with the unique characteristics of TPUs and the enhanced thermal conductivity of its NG/TPU composites.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Thermal properties of materials · Polymer composites and self-healing · Tribology and Wear Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (73)
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