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Updated: Jul 27, 2025
07:02
The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry
Published on: August 25, 2016
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Elastocaloric Waste/Natural Rubber Materials with Various Crosslink Densities
Nicolas Candau1, Adele Zimny1, Eduard Vives2,3
1Departament de Ciència i Enginyeria de Materials (CEM), Escola d'Enginyeria Barcelona-Est (EEBE), Universitat Politècnica de Catalunya BarcelonaTech (UPC), Av. Eduard Maristany 16, 08019 Barcelona, Spain.
Polymers
|June 10, 2023
Summary
Natural rubber composites show promise for eco-friendly cooling devices. Optimizing thickness and filler content significantly enhances their elastocaloric (eC) effect, achieving a 12°C temperature span.
Area of Science:
- Materials Science
- Thermodynamics
- Polymer Engineering
Background:
- Elastocaloric (eC) materials are key for efficient heating/cooling devices.
- Natural rubber (NR) offers a low-stress, wide temperature span (ΔT) eC effect.
- Further enhancement of ΔT in NR is crucial for practical cooling applications.
Purpose of the Study:
- To design and optimize NR-based composites for improved elastocaloric performance.
- To investigate the impact of specimen thickness, crosslink density, and ground tire rubber (GTR) content.
- To evaluate eC properties under both single and cyclic loading conditions.
Main Methods:
- Fabrication of vulcanized rubber composites with varying GTR content and thickness.
- Utilized infrared thermography to measure surface heat exchange.
- Characterized elastocaloric properties under single and cyclic loading.
Main Results:
- Optimal eC performance achieved with 0.6 mm thickness and 30 wt.% GTR.
- Maximum temperature spans of 12°C (single cycle) and 4°C (cyclic) were recorded.
- Homogeneous curing, higher crosslink density, and GTR content promoted strain-induced crystallization.
Conclusions:
- Optimized NR composites demonstrate significant potential for elastocaloric cooling.
- Material design parameters like thickness and filler content are critical for eC performance.
- These findings support the development of sustainable, rubber-based heating/cooling technologies.
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