MSE 2024
Poster
Reprocessable, Self-Adherable High-Performance Carbon Fiber Reinforced Vitrimer Composites with Reverse Fatigue Capacity
HS

Harsh Sharma (M.Eng.)

UPES

Sharma, H. (Speaker)¹; Kumar, A.¹; Rana, S.¹
¹UPES, Dehradun (India)

After extensive research spanning several decades, fatigue is still the leading factor responsible for catastrophic failures in fiber-reinforced composites[1]. This study introduced a carbon fiber reinforced (CFRP) vitrimeric system developed through vacuum assisted resin infusion molding (VARIM) process. The system allows the repeated reversal of fatigue damage via reversible covalent adaptable networks (vitrimers) where heating the material to a temperature beyond its glass transition temperature is helpful to achieve self-healing in the materials and thus enhancing the reliability and safety of the components[2]. In addition, the vitrimeric system and its composites show excellent mechanical, self-adhering, shape-memory, and reprocessing properties. The developed CFRP vitrimer composites can be rapidly dissolved in thiol solvent (1-octanethiol), due to the thiol-disulfide exchange reaction, resulting in the efficient recycling of carbon fibers (CFs). X-ray diffraction, scanning electron microscopy, and Raman spectroscopy confirm the chemical structure of the recycled fibers, which is similar to pristine carbon fibers[3]. The recycled CFs can be used to prepare “2nd generation” composite materials with excellent mechanical properties for non-structural applications (e.g., sports, automotive etc.). Thus, this study assists in preparing reliable, long-term functional, recyclable, and high-performance composites with efficient carbon fiber recycling strategy.

Abstract

Abstract

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Poster

Poster

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