TY - JOUR

T1 - Reprocessable carbon fiber vitrimer composites

T2 - Reclamation and reformatting of carbon fibers for second generation composite materials

AU - Sharma, Harsh

AU - Bender, Marcel

AU - Kim, Geonwoo

AU - Lee, Dongkwan

AU - Caglayan, Cigdem

AU - Schlögl, Sandra

AU - Yun, Gun Jin

AU - Kumar, Ajay

AU - Rana, Svarendra

N1 - Publisher Copyright: © 2024 Wiley Periodicals LLC.

PY - 2024/8/24

Y1 - 2024/8/24

N2 - Carbon fibers (CFs) are experiencing a growing demand owing to their lowspecific weight, exceptional mechanical properties, superior temperature, andcorrosion resistance, however, their sustainability and energy consumptionduring manufacturing is still a challenge. Therefore, reclamation of waste CFsand their reformatting has gained significant attention. Herein, we synthesizeda chemically degradable vitrimer matrix by curing bisphenol-A diglycidyl ether(BADGE) with 2-aminophenyl disulfide (2-AFD) and further utilized thematrix for the development of CF reinforced composites (CFRCs) through vac-uum-assisted resin infusion molding (VARIM) process. The obtained vitrimericsystem and its composites show excellent mechanical, self-adhering, shape-memory, and reprocessing properties. Meanwhile, the developed CFRP vitri-mer composites can be rapidly dissolved in thiol solvent (1-octanethiol), result-ing in the efficient recycling of CFs. X-ray diffraction, scanning electronmicroscopy, and Raman spectroscopy validate that the chemical structure ofthe recycled fibers closely resembles the structure of the original CFs. Therecycled CFs were further used to prepare second generation composite mate-rials with excellent thermal, dynamic, and mechanical properties for nonstruc-tural applications (e.g., sports, automotive, etc.). Thus, with an effective CFrecycling method, this study can assist in preparing reliable, long-term func-tional, recyclable, and high-performance composites.

AB - Carbon fibers (CFs) are experiencing a growing demand owing to their lowspecific weight, exceptional mechanical properties, superior temperature, andcorrosion resistance, however, their sustainability and energy consumptionduring manufacturing is still a challenge. Therefore, reclamation of waste CFsand their reformatting has gained significant attention. Herein, we synthesizeda chemically degradable vitrimer matrix by curing bisphenol-A diglycidyl ether(BADGE) with 2-aminophenyl disulfide (2-AFD) and further utilized thematrix for the development of CF reinforced composites (CFRCs) through vac-uum-assisted resin infusion molding (VARIM) process. The obtained vitrimericsystem and its composites show excellent mechanical, self-adhering, shape-memory, and reprocessing properties. Meanwhile, the developed CFRP vitri-mer composites can be rapidly dissolved in thiol solvent (1-octanethiol), result-ing in the efficient recycling of CFs. X-ray diffraction, scanning electronmicroscopy, and Raman spectroscopy validate that the chemical structure ofthe recycled fibers closely resembles the structure of the original CFs. Therecycled CFs were further used to prepare second generation composite mate-rials with excellent thermal, dynamic, and mechanical properties for nonstruc-tural applications (e.g., sports, automotive, etc.). Thus, with an effective CFrecycling method, this study can assist in preparing reliable, long-term func-tional, recyclable, and high-performance composites.

KW - Crosslinking

KW - Recycling

KW - Thermosets

KW - thermosets

KW - recycling

KW - crosslinking

UR - https://pureadmin.unileoben.ac.at/portal/en/publications/reprocessable-carbon-fiber-vitrimer-composites-reclamation-and-reformatting-of-carbon-fibers-for-second-generation-composite-materials(f74ebfb9-b56f-4a1f-ac5a-2e53d37ceee2).html

UR - http://www.scopus.com/inward/record.url?scp=85200591233&partnerID=8YFLogxK

U2 - 10.1002/app.56074

DO - 10.1002/app.56074

M3 - Article

VL - 141.2024

JO - Journal of Applied Polymer Science

JF - Journal of Applied Polymer Science

SN - 0021-8995

IS - 41

M1 - e56074

ER -