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Use of covalent dynamic networks as binders on epoxy-based carbon fiber composites: Effect on properties, processing, and recyclability

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journal contribution
posted on 2023-08-25, 11:48 authored by Julio Vidal, Carlos Hornero, Ruth Garcia, Jesus Cuartero, Anne Beaucamp McLoughlinAnne Beaucamp McLoughlin, MAURICE COLLINSMAURICE COLLINS, Lidia Garcia, David Ponce, Mari Carme Royo, Elisabeth Sanchez, Pere Castell

Composites are gaining widespread market interest due to their outstanding mechanical properties and light weight. However, this growth is hindered by the lack of sustainable recycling solutions. This research aims to integrate reversible chemistries to advanced carbon fiber-reinforced composite materials for recycling in a so-called eco-design, circular approach. Diene and dienophile reactions are generated at the surface of the carbon fiber allowing a bond–debond interaction with the epoxy matrix. The application of the Diels–Alder adduct on the fiber modifies its polarity and structure. This research assesses a biobased and synthetic epoxy equivalent and demonstrates that this newly developed interphase chemistry has a direct impact on the crosslinking effi?ciency of the resin, as well as on their interlaminar properties. Furthermore, it has been observed that depending on the type of resin, these changes can have differing impacts on final properties of the composite, reducing the crosslink?ing density up to 50% in some modifications while in others the Tg remains constant.

Funding

IMPROVING RECYCLABILITY OF THERMOSET COMPOSITE MATERIALS THROUGH A GREENER RECYCLING TECHNOLOGY BASED ON REVERSIBLE BIOBASED BONDING MATERIALS

European Commission

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History

Publication

Polymer Composites, 2023. pp. 1-13

Publisher

Wiley and Sons Ltd

Also affiliated with

  • Bernal Institute

Sustainable development goals

  • (9) Industry, Innovation and Infrastructure

Department or School

  • School of Engineering

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