Highly Tear-Resistant Recyclable Carbon Fiber Reinforced Composites Relying on Woven Cross-Linked Polyurethanes.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 40200172.
- Also identified by DOI 10.1021/acs.nanolett.5c00606.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
The poor ductility and irreversible properties of covalently cross-linked polymers result in carbon fiber-reinforced polymer composites (CFRPs) with low tear resistance and nonrecyclability. In this work, a flexible woven polyurethane (WPPN<sub>n</sub>) prepared via a woven cross-linker was used for the first time as a binder for CFRPs. WPPN<sub>2000</sub> exhibited an ultrahigh strength of 50.4 MPa, a toughness of 267.2 MJ m<sup>-3</sup>, and an excellent fracture energy (211.6 kJ m<sup>-2</sup>). Simulation results and characterization tests confirmed the high energy dissipation of the woven network. The WPPN<sub>2000</sub>-CF composites achieved a tear resistance of 1004.5 kJ m<sup>-2</sup>, which is 16.4 times higher than that of the epoxy-CF composites (61.2 kJ m<sup>-2</sup>). In addition, due to the dynamic nature of the woven cross-linking, the carbon fiber can be recovered nondestructively using solvent. The woven cross-linking strategy provided new ideas for the design of carbon fiber adhesives.