Recycling of Carbon Fiber Reinforced Plastics by Microwave Pyrolysis [Tech Paper]

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Title: Recycling of Carbon Fiber Reinforced Plastics by Microwave Pyrolysis [Tech Paper]

Abstract:

Carbon fiber reinforced plastic (CFRP) materials are used for a variety of applications: aerospace, aviation, wind turbines, automotive, construction and sports industries. However, one of the problems associated with the use of CFRPs is the difficulty of recycling them. The recycling of CFRPs targets both those from the manufacturing phase and those from the end-of-life structures. So far, several techniques have been put forward to recover fibers and / or resin from CFRPs (Grinding, cement incineration, solvolysis and, pyrolysis). Of all these techniques, pyrolysis appears to be the most efficient, because it uses less energy and it gives properties comparable to virgin fibers. During microwave pyrolysis of CFRP, depolymerization of the resin is made possible by the energy supplied to the composite in the form of microwaves. The use of microwaves offers the advantage of degrading the resin more quickly in comparison to a conventional pyrolysis in an oven and exposes carbon fibers to the high temperatures for a very short time. In addition, Carbon fibers are good microwave absorbers. In this article, we present a cost efficient, rapid and green approach for reclamation of carbon fibers reinforced plastics.

Difficulty Rating: Moderate (Working Knowledge of Technical Content)

Track: Green & Sustainability


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