Tough and recyclable carbon-fiber composites with exceptional interfacial adhesion via a tailored vitrimer-fiber interface

Rahman, Md Anisur; Karunarathna, Menisha S.; Bowland, Christopher C.; Yang, Guang; Gainaru, Catalin; Li, Bingrui; Kim, Sungjin; Chawla, Vivek; Ghezawi, Natasha; Meyer III, Harry M.; Naskar, Amit K.; Penumadu, Dayakar; Sokolov, Alexei P.; Saito, Tomonori

doi:10.1016/j.xcrp.2023.101695

Title: Tough and recyclable carbon-fiber composites with exceptional interfacial adhesion via a tailored vitrimer-fiber interface

Journal Article · 20 November 2023 · Cell Reports Physical Science

DOI: https://doi.org/10.1016/j.xcrp.2023.101695 · OSTI ID:2217255

^[1]; Karunarathna, Menisha S. ^[1]; Bowland, Christopher C. ^[1]; Yang, Guang ^[1]; Gainaru, Catalin ^[1]; Li, Bingrui ^[2]; Kim, Sungjin ^[1]; Chawla, Vivek ^[3]; Ghezawi, Natasha ^[2]; Meyer III, Harry M. ^[1]; Naskar, Amit K. ^[1]; Penumadu, Dayakar ^[3]; Sokolov, Alexei P. ^[2]; Saito, Tomonori ^[2]

Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); University of Tennessee, Knoxville, TN (United States)
University of Tennessee, Knoxville, TN (United States)

Carbon-fiber-reinforced polymers (CFRPs) offer improved energy efficiency in aerospace and automobile applications due to lightweight and mechanical robustness but face challenges with limited recyclability and frequent fiber-polymer delamination caused by inadequate interfacial adhesion. Here, we report an effective design of tough and closed-loop recyclable carbon-fiber-reinforced vitrimers (CFRVs) with exceptional interfacial adhesion through the synergy of a boronic ester-modified commodity polymer, multidiol cross-linker, and diol-functionalized carbon fibers (CFs). The dynamic covalent bonding between the vitrimer and fiber interface results in 43% higher interfacial adhesion than that of CFRVs with pristine CFs. Moreover, CFRVs with diol-CFs exhibit ~731-MPa tensile strength, 26% higher than unmodified CFRVs and 49% higher than conventional epoxy CFRPs. Importantly, the dynamic boronic ester exchange enables CFRV closed-loop recyclability, repairability, fast thermoformability, self-adhesion, and multicycle processability without compromising mechanical performance. The designed dynamic fiber-matrix interaction will open up a new paradigm of multifunctional CFRPs while providing a path toward closed-loop structural materials.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO); USDOE Office of Electricity (OE); USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 2217255

Alternate ID(s):: OSTI ID: 2281146

Journal Information:: Cell Reports Physical Science, Vol. 4, Issue 12; ISSN 2666-3864

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
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Title: Tough and recyclable carbon-fiber composites with exceptional interfacial adhesion via a tailored vitrimer-fiber interface

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