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Study of the processability of structural composite waste from the automotive industry

Grant number: 23/03739-9
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): May 01, 2023
Effective date (End): April 30, 2024
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
Principal Investigator:Fabio Roberto Passador
Grantee:Maria Eduarda Barbosa dos Santos
Host Institution: Instituto de Ciência e Tecnologia (ICT). Universidade Federal de São Paulo (UNIFESP). Campus São José dos Campos. São José dos Campos , SP, Brazil


The amount of carbon fiber-reinforced thermoplastic composite (CFRP) waste from the automotive industry has been increasing with the demand for these composites. These wastes have excellent properties and high costs, thus, the need to develop viable recycling methods that serve as an alternative for a final destination. The main objective of this project is the study of the mechanical recycling of waste thermoplastic composites based on polyamide 6 (PA6) reinforced with carbon fiber (CF) from industries in the automotive sector using hot compression processing. Initially, CF/PA6 composite waste will be characterized for thermal properties (differential scanning calorimetry, DSC, and thermogravimetric analysis, TGA) to define processing conditions. Then the composites will be cut in dimensions 2 cm x 2 cm, followed by random arrangement in aluminum molds and processed by hot compression, using the parameters determined by the thermal tests. Standardized specimens will be cut with the aid of a CNC Router machine. The properties of the obtained recycled thermoplastic composites will be evaluated by flexural strength, Charpy impact strength, Shore D hardness, and determination of the heat deflection temperature (HDT), and the morphological characteristics of the fracture surface will be evaluated by scanning electron microscopy (SEM). The properties will be assessed and compared with results from the material suppliers. The final product obtained is expected to present attractive properties to the market with low production cost and it can be applied in non-structural components for the automotive and aeronautical sectors.

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