title: Multiply fully recyclable carbon fibre reinforced heat-resistant covalent thermosetting advanced composites.
abstract: Nondestructive retrieval of expensive carbon fibres (CFs) from CF-reinforced thermosetting advanced composites widely applied in high-tech fields has remained inaccessible as the harsh conditions required to recycle high-performance resin matrices unavoidably damage the structure and properties of CFs. Degradable thermosetting resins with stable covalent structures offer a potential solution to this conflict. Here we design a new synthesis scheme and prepare a recyclable CF-reinforced poly(hexahydrotriazine) resin matrix advanced composite. The multiple recycling experiments and characterization data establish that this composite demonstrates performance comparable to those of its commercial counterparts, and more importantly, it realizes multiple intact recoveries of CFs and near-total recycling of the principal raw materials through gentle depolymerization in certain dilute acid solution. To our best knowledge, this study demonstrates for the first time a feasible and environment-friendly preparation-recycle-regeneration strategy for multiple CF-recycling from CF-reinforced advanced composites.
authors.affiliation: College of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China.
authors.forename: Yanchao
authors.initials: Y
authors.lastname: Yuan
authors.affiliation: College of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China.
authors.forename: Yanxiao
authors.initials: Y
authors.lastname: Sun
authors.affiliation: College of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China.
authors.forename: Shijing
authors.initials: S
authors.lastname: Yan
authors.affiliation: College of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China.
authors.forename: Jianqing
authors.initials: J
authors.lastname: Zhao
authors.affiliation: College of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China.
authors.forename: Shumei
authors.initials: S
authors.lastname: Liu
authors.affiliation: Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China.
authors.forename: Mingqiu
authors.initials: M
authors.lastname: Zhang
authors.affiliation: College of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China.
authors.forename: Xiaoxing
authors.initials: X
authors.lastname: Zheng
authors.affiliation: College of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Jia
mesh_terms: D000077482:Carbon Fiber / Q000737:chemistry*; D006358:Hot Temperature; D008422:Materials Testing; D058105:Polymerization; D059027:Recycling; D033081:Shear Strength; D013314:Stress, Mechanical; D013499:Surface Properties
chemical_list: D000077482:Carbon Fiber