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• Elastomeric composite materials reinforced with natural fibers and with self-healing capacity

  S. Utrera-Barrios, O. Lopes, M. Hernandez Santana

  Materiales Compuestos (2024). Vol. 08 - COMUNICACIONES MATCOMP21 (2022) Y MATCOMP23 (2023), (Núm. 4 - Sostenibilidad y Reciclaje), 17

  
  

  Abstract

  Elastomeric composite materials are widely used in multiple applications, especially in the automotive industry; however, they have the drawback of being difficult to recycle, generating a significant environmental impact. For this reason, in recent years there has been an increase in research for the development of self-healing and biodegradable materials that minimize this impact by extending their lifetime. In this context, the aim of this work is to design a new generation of self-healing elastomeric composite materials using additives of natural origin. For this, epoxidized natural rubber (ENR) and cellulose propionate (CP) were used as matrix, reinforced with cellulose fibers. Self-healing was achieved by combining the flow of the thermoplastic (CP) phase (extrinsic mechanism) and the formation of hydrogen bonds between the ENR and the CP (intrinsic mechanism). A promising repair efficiency of 95% was obtained, as well as an increase in tensile strength in the presence of cellulose fibers, without affecting the healing capacity of the material. Therefore, this work overcomes the well-known dichotomy between mechanical performance and self-healing and constitutes a new contribution in the field of self-healing elastomeric composites using bio-based additives.

  Abstract
  Elastomeric composite materials are widely used in multiple applications, especially in the automotive industry; however, they have the drawback of being difficult to recycle, [...]

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• SELF-HEALING STRATEGIES IN RUBBER COMPOSITES

  S. Utrera-Barrios, J. Araujo-Morera, R. Manzanares, R. Verdejo, M. López-Manchado, M. Hernandez Santana

  Materiales Compuestos (2022). Vol. 07 - COMUNICACIONES MATCOMP21 (2022), (Núm. 1 - Sostenibilidad y reciclaje - Fabricación), 107

  
  

  Abstract

  Inspired by some of the mechanisms that occur in nature, self-healing materials are characterized by the ability to recover, partially or totally, their initial properties after suffering damage. These materials constitute an efficient alternative for extending the lifecycle of products, as well as for reducing the amount of waste generated. At the same time, they reduce maintenance and repair costs. In this work, examples of recent developments in the field of elastomeric composite materials are presented, studying different matrices, natural rubber (NR), epoxidized natural rubber (ENR), styrene-butadiene rubber (SBR) and nitrile rubber (NBR), and using diverse repair strategies, hydrogen bonds, disulfide exchange reactions, Diels-Alder chemistry and ionic interactions. The effect of adding carbon-derived reinforcing fillers (graphene oxide) and sustainable alternative fillers (ground tire rubber) is also analyzed. It is studied how the presence and type of filler influences the healing capacity of elastomeric matrices, reaching repair efficiencies of up to ~80%, without detriment to their mechanical performance.

  Abstract
  Inspired by some of the mechanisms that occur in nature, self-healing materials are characterized by the ability to recover, partially or totally, their initial properties [...]

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• Development of self-healing rubber biocomposites: a sustainable approach - bioHEAL

  S. Utrera-Barrios, J. Araujo-Morera, O. Ricciardi, R. Verdejo, M. López-Manchado, M. Hernandez Santana

  Materiales Compuestos (2022). Vol. 06 - AEMAC en PROYECTOS EUROPEOS (2022), (Núm. 1 - Monográfico Proyectos Europeos), 19

  
  

  Abstract

  The bioHEAL project is part of the i-LINK+ Programme from the Spanish National Research Council (CSIC) that aims to stimulate the collaboration between CSIC research groups and international research groups of the highest relevance by means of its own resources with a common research topic and complementary strengths. All this within the scope of the 17 Sustainable Development Goals of the United Nations (UN-SDG). The purpose of i-LINK+ is the creation and consolidation of consortia of international excellence to compete in future calls for research and innovation (R&D) projects in the international arena, as well as the internationalization of International Thematic Platforms (PTI), a mixed (public-private) R&D instrument that brings together research teams, administrations and companies that join forces to solve specific problems. The objective of bioHEAL is to develop ad-hoc self-healing rubber biocomposites reinforced with natural fillers (bio-based and renewable). bioHEAL will count with the participation of the Institute of Polymer Science and Technology (ICTP-CSIC, Spain), which lead the project, Gdnask University of Technology (GUT, Poland), Chalmers University of Technology (CUT, Sweden), Vrije University of Brussel (VUB, Belgium) and the Unversity of Wisconsin-Madison (UWM, United States of America). With this collaboration we will contribute to UN-SDG12 through the promotion of strategies for sustainable consumption and efficient use of resources, such as reducing waste generation thanks to the implementation of a key property for the future of smart materials: self-healing.

  Abstract
  The bioHEAL project is part of the i-LINK+ Programme from the Spanish National Research Council (CSIC) that aims to stimulate the collaboration between CSIC research groups [...]

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