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Rheology of recycled polypropylene and wastepaper reinforced composite to obtain sustainable filaments for 3D printing

Grant number: 20/02361-4
Support type:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): May 25, 2021
Effective date (End): November 24, 2021
Field of knowledge:Engineering - Materials and Metallurgical Engineering
Principal researcher:Herman Jacobus Cornelis Voorwald
Grantee:Daniel Magalhães de Oliveira
Supervisor abroad: Denis Rodrigue
Home Institution: Faculdade de Engenharia (FEG). Universidade Estadual Paulista (UNESP). Campus de Guaratinguetá. Guaratinguetá , SP, Brazil
Research place: Université Laval, Canada  
Associated to the scholarship:19/02607-6 - 3D printing sustainable filament from recycled polypropylene reinforced with waste paper, BP.DR

Abstract

One of the biggest challenges of contemporary society is to deal with the excessive generation of solid waste and its disposal. Demographic growth combined with technological development causes an increase in industrial production and consumption patterns, creating pressure on natural systems and resources. Furthermore, inadequate waste management and lack of appropriate disposal areas bring consequently global environmental impacts. Environmental policies have guided governments, society, academia and industry towards sustainable solid waste management. Therefore, additive manufacturing (AM) has arisen as a solution encouraging the development of new materials from renewable sources and new manufacturing technologies. For sustainability reasons, 3D printing filaments can be manufactured from recycled polymers and composites, enabling to reduce materials cost while maintaining their performance and useful life. However, the rheological properties affect the molten polymers processing, directly influencing the morphological and mechanical properties as well as the final product performance. Therefore, this project aims at manufacturing recycled polypropylene (PP) from disposable cups reinforced with wastepaper composites to obtain sustainable filaments for 3D printing. In particular, a complete rheological study is performed to predict and understand the flow properties to optimize the processing conditions and final properties. The work also includes a complete characterization of the raw materials (wastepaper and recycled PP) and their composites.