Flax fiber-reinforced fatty acid vitrimer biocomposite with enhanced chemical recyclability

Rohewal, Sargun Singh; Yu, Zeyang; Kearney, Logan T.; Toomey, Michael D.; Ghossein, Hicham K.; Naskar, Amit K.

doi:10.1557/s43579-024-00556-1

Title: Flax fiber-reinforced fatty acid vitrimer biocomposite with enhanced chemical recyclability

Journal Article · 15 May 2024 · MRS communications

DOI: https://doi.org/10.1557/s43579-024-00556-1 · OSTI ID:2441073

Rohewal, Sargun Singh ^[1]; Yu, Zeyang ^[2]; Kearney, Logan T. ^[2]; Toomey, Michael D. ^[2]; Ghossein, Hicham K. ^[3];

^[1]

Univ. of Tennessee, Knoxville, TN (United States). Bredesen Center for Interdisciplinary Research and Graduate Education; Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Endeavor Composites, Inc., Knoxville, TN (United States)

Here, this study unveils a sustainable, easily recyclable biocomposite, leveraging the dynamic nature of covalently adaptive bonds in a vitrimer matrix. The fabrication involved a fatty acid-derived vitrimer as the polymer matrix and multi-layered, nonwoven flax mat as reinforcing scaffold. The incorporation of these fibers significantly improved the mechanical performance of the vitrimer matrix uniformly. The ester-based covalently adaptive network plays a crucial role in enabling exceptional fiber-matrix bonding, as well as recyclability. The vitrimer matrix dissolves in ethylene glycol through transesterification, facilitating complete material recovery and biocomposite recycling without compromising the original properties of the matrix and reinforcing fibers.

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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 Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 2441073

Journal Information:: MRS communications, Journal Name: MRS communications Journal Issue: 4 Vol. 14; ISSN 2159-6867

Publisher:: Springer NatureCopyright Statement

Country of Publication:: United States

Language:: English

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