Sustainable composites with self-healing capability: Epoxidized natural rubber and cellulose propionate reinforced with cellulose fibers
Aligned with the UN's Sustainable Development Goals (SDGs), self-healing elas- tomers stand out as a cutting-edge field in Rubber Science and Technology. These materials have the potential to reduce resource consumption, prolong the lifespan of infrastructure and products, and contribute to the...
| Autores: | , , , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/350913 |
| Acesso em linha: | http://hdl.handle.net/10261/350913 |
| Access Level: | acceso abierto |
| Palavra-chave: | cellulose natural rubber rubber composites self-healing materials sustainability |
| Resumo: | Aligned with the UN's Sustainable Development Goals (SDGs), self-healing elas- tomers stand out as a cutting-edge field in Rubber Science and Technology. These materials have the potential to reduce resource consumption, prolong the lifespan of infrastructure and products, and contribute to the Circular Economy. This study presents the development of bio-based self-healing elastomeric com- posites prepared from blends of epoxidized natural rubber (ENR) and cellulose propionate (CP) reinforced with cellulose fibers (CFs). The ENR/CP ratio was optimized, with a 70/30 ratio enhancing the tensile strength (TS) of the base rub- ber and slightly reducing the elongation at break. This blend demonstrated a TS healing efficiency of 75% after a temperature-driven healing protocol (200 bar at 150 C during 12 h). Then, the CF content was varied to enhance both mechani- cal performance and self-healing capabilities. Remarkably, from medium-high (5 phr to 15 phr) CF content, healing efficiencies higher than 85% were observed with important improvements in the mechanical performance. The self-healing process was attributed to the synergistic interplay between the polymeric chain mobility and the formation of hydrogen bonds. This innovative approach prom- ises materials with extended lifespans, mechanical robustness, and repairability, underscoring the commitment to SDGs 9, 11, 12, 13, 14, and 15. |
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