Thermally stable and highly recyclable carbon fiber-reinforced polyketone composites based on mechanochemical bond formation
- Thermally stable and highly recyclable carbon fiber-reinforced polyketone composites based on mechanochemical bond formation
- 이상수; 박종혁; 김태안; 유지완; 최한형; 이영모
- Polymer-matrix composites; Carbon fibre; Recycling; Thermal properties
- Issue Date
- Composites. Part A, Applied science and manufacturing
- VOL 142, 106251
- Compounding polyketone (PK) with carbon fibers (CFs) can provide composites that exhibit excellent properties. However, the thermal stability of PK itself is poor, limiting practical applications at high temperatures. Herein, a novel process is proposed to improve the thermal stability of PK-based carbon fiber-reinforced polymers (CFRPs). The plasma-assisted mechanochemistry (PMC) process creates mechanochemical bonds between materials under dry conditions, reducing polymer chain mobility at high temperatures and increasing the stiffness. Compared with conventional PK-based CFRPs, PMC-processed CFRPs have significantly higher glass transition temperatures and storage modulus, resulting in improved thermal stability. The tensile strength remained >90% after annealing at 150 °C for 1000 h. Moreover, despite repeated thermal hysteresis, the recycled PK-based CFRPs showed tensile strength, Young's modulus, and elongation at break that were >90% of initial values. This work provides a feasible and ecofriendly strategy to expand the applications and promote repeated recycling of PK-based CFRPs.
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