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Shape memory polymers fabricated with recycled thermoplastics by 3D printing

Description
Shape Memory Polymers (SMPs) are smart polyurethane thermoplastics that can recover their original shape after undergoing deformation. This shape recovery can be actuated by raising the SMP above its glass transition temperature, Tg. This report outlines a process for repeatedly recycling SMPs using 3D printing. Cubes are printed, broken down…

Shape Memory Polymers (SMPs) are smart polyurethane thermoplastics that can recover their original shape after undergoing deformation. This shape recovery can be actuated by raising the SMP above its glass transition temperature, Tg. This report outlines a process for repeatedly recycling SMPs using 3D printing. Cubes are printed, broken down into pellets mechanically, and re-extruded into filament. This simulates a recycling iteration that the material would undergo in industry. The samples are recycled 0, 1, 3, and 5 times, then printed into rectangular and dog-bone shapes. These shapes are used to perform dynamic mechanical analysis (DMA) and 3-point bending for shape recovery testing. Samples will also be used for scanning electron microscopy (SEM) to characterize their microstructure.
ContributorsSweeney, Andrew Joseph (Author) / Yekani Fard, Masoud (Thesis director) / Chattopadhyay, Aditi (Committee member) / W.P. Carey School of Business (Contributor) / Mechanical and Aerospace Engineering Program (Contributor) / Barrett, The Honors College (Contributor)
Created2018-05
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Mechanical Properties of Recycled 3D Print Filament

Description
Filament used in 3D printers can vary by size, color, and material. Most commonly thermoplastics are used for rapid prototyping by industry. Recycled filament has the potential to reduce cost and provide a more sustainable and energy efficient approach to 3D printing. This can be a viable option if recycled…

Filament used in 3D printers can vary by size, color, and material. Most commonly thermoplastics are used for rapid prototyping by industry. Recycled filament has the potential to reduce cost and provide a more sustainable and energy efficient approach to 3D printing. This can be a viable option if recycled parts show comparable mechanical characteristics to non-recycled material. This report focuses on the development of a methodology to efficiently characterize recycled filament for application in industry. A crush sample in the shape of a hollow cube and a dog-bone shaped specimen will be created using a filament extruder and 3D printer. The crush sample will be broken and extruded to produce a recycled filament. The crush sample will undergo a varying number of recycles (i.e. breakings) per sample group to simulate mechanical degradation; 0, 1, 2, and 5 recycling loops. The samples will undergo micro mechanical (microscopy analysis) and macro mechanical (tensile) characterization.
ContributorsPalermo, Marissa Nicole (Author) / Chattopadhyay, Aditi (Thesis director) / Yekani Fard, Masoud (Committee member) / Mechanical and Aerospace Engineering Program (Contributor) / Barrett, The Honors College (Contributor)
Created2016-12
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3DCycler: Product Launch/Development

Description
Three dimensional printing is a growing field and an excellent medium for rapid prototyping. Its expansion has accelerated over recent years due to the increased affordability of the technology. It is now at the point where the startup cost to get into the field is down to the hobbyist price…

Three dimensional printing is a growing field and an excellent medium for rapid prototyping. Its expansion has accelerated over recent years due to the increased affordability of the technology. It is now at the point where the startup cost to get into the field is down to the hobbyist price point. This means that there is an extremely high demand for affordable printing media. Current media such as ABS and PLA is extremely easy to form, but expensive and petroleum intensive to create. A recycling system that could work with a large variety of waste products could change the way that the maker community recycles. This Honors Thesis, or "Creative Project" will be centered on the product launch of small business 3DCycler. Although this launch will require pulling information and skills from various branches of both Business and Science, the scope of this project will be limited to specifically the market entrance of our small business/ product. Within this blanket goal, the project aims to define our target market/ its niche(s), develop proper IP/ lockout strategies, define future manufacturing strategies, and to fully define our beta product. The research was empirical in nature. Through data gathering techniques (e.g., consultations, interviews, survey), exploration was performed. Through these techniques the company 3DCycler took several calculated pivots in order to prepare the company for a strategic product launch and eventual acquisition.
ContributorsFarber-Schaefer, Blaine (Author) / Cho, Steve (Thesis director) / Goodman, Tom (Committee member) / Engineering Programs (Contributor) / Barrett, The Honors College (Contributor)
Created2016-12
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The Issue of Small Format Recycling and a Possible Solution

Description

Currently, recycling is a major issue found throughout the world; however, one of the main issues, small format recycling, is still yet to be solved. The main objective of this paper is to discuss the issues surrounding recycling in general and more specifically small format recycling in order to…

Currently, recycling is a major issue found throughout the world; however, one of the main issues, small format recycling, is still yet to be solved. The main objective of this paper is to discuss the issues surrounding recycling in general and more specifically small format recycling in order to develop a solution that can solve the problem. Working with InnovationSpace and people in industry, interviews were conducted in order to determine the best course of action to address the need of the sponsor, The Sustainability Consortium. After extensive research and interviews, it was determined that implementing a new MRF attachment to circulate small format back to the main residual stream would be the best course of action. This attachment would be modular for a MRF and could be implemented in order to gather more material while also producing higher quality recycled goods. This has major implications for the recycling industry and could help in making recycling profitable once again.
ContributorsSullivan, Neal (Author) / Kuhn, Anthony (Thesis director) / Heller, Cheryl (Committee member) / Mechanical and Aerospace Engineering Program (Contributor) / Barrett, The Honors College (Contributor)
Created2021-05

Founder's Lab - Kandi Society

Description

For the honors thesis project, a group of five individuals collaborated to design and implement a sustainable business in the ASU community. Kandi Society is a rising jewelry brand whose top priorities include giving recycled plastic a new purpose, philanthropy, and making a welcoming, creative environment for our customers. We…

For the honors thesis project, a group of five individuals collaborated to design and implement a sustainable business in the ASU community. Kandi Society is a rising jewelry brand whose top priorities include giving recycled plastic a new purpose, philanthropy, and making a welcoming, creative environment for our customers. We designed the Eco-Bead with 3D CAD modeling and produced it through a process called plastic injection molding which is explained in detail in the final paper. Kandi Society instilled a positive impact on ASU students by igniting a sustainability spark and increasing interest in repurposing materials in the future.
ContributorsConnolly, Payton (Author) / Guebara, Chloe (Co-author) / Grundhoffer, Andie (Co-author) / Maxwell, Olivia (Co-author) / Bia, Aleya (Co-author) / Byrne, Jared (Thesis director) / Swader, Melissa (Committee member) / Barrett, The Honors College (Contributor) / The Design School (Contributor) / Mechanical and Aerospace Engineering Program (Contributor)
Created2023-05

Founder's Lab - Kandi Society

Description

For the honors thesis project, a group of five individuals collaborated to design and implement a sustainable business in the ASU community. Kandi Society is a rising jewelry brand whose top priorities include giving recycled plastic a new purpose, philanthropy, and making a welcoming, creative environment for our customers. We…

For the honors thesis project, a group of five individuals collaborated to design and implement a sustainable business in the ASU community. Kandi Society is a rising jewelry brand whose top priorities include giving recycled plastic a new purpose, philanthropy, and making a welcoming, creative environment for our customers. We designed the Eco-Bead with 3D CAD modeling and produced it through a process called plastic injection molding which is explained in detail in the final paper. Kandi Society instilled a positive impact on ASU students by igniting a sustainability spark and increasing interest in repurposing materials in the future.
ContributorsGuebara, Chloe (Author) / Connolly, Payton (Co-author) / Maxwell, Olivia (Co-author) / Bia, Aleya (Co-author) / Grundhoffer, Andie (Co-author) / Byrne, Jared (Thesis director) / Swader, Melissa (Committee member) / Binch, Bill (Committee member) / Barrett, The Honors College (Contributor) / Mechanical and Aerospace Engineering Program (Contributor)
Created2023-05
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Scalability Analysis of Recycling Markets for NdFeB Magnets in the United States

Description
Over the past decades, rare earth elements (REE) have become a crucial backbone to the functioning of modern technology infrastructure, particularly due to their inclusion within NdFeB magnets which power technologies such as hard disk drives and wind turbines. However, mining and extraction of REEs pose significant environmental and human…

Over the past decades, rare earth elements (REE) have become a crucial backbone to the functioning of modern technology infrastructure, particularly due to their inclusion within NdFeB magnets which power technologies such as hard disk drives and wind turbines. However, mining and extraction of REEs pose significant environmental and human health risks, thus signaling a need for more sustainable methods of sourcing. This research aims to compare the impact and effectiveness of three recycling processes for decommissioned NdFeB magnets sourced from end-of-life wind turbines, as well as consider strategies for developing these processes on an industrial scale. A material flow analysis (MFA) has been conducted to determine comparable input and output factors for two types of laboratory-scale recycling methods, molten salt electrolysis and hydrometallurgy, and one industrial-scale method, magnet-to-magnet. Following this, an impact analysis of potential industrial level magnet recycling operations for molten salt electrolysis and hydrometallurgy was conducted. The results show that molten salt electrolysis had the highest levels of impact for global warming, ozone depletion, and energy usage of the three methods when scaled on an industrial level. Hydrometallurgy had relatively low energy usage and emissions impacts but required large amounts of water and produced high levels of wastewater. The magnet-to-magnet process showed promising impact results in comparison with the alternate two methods, but further development needs to be done to circumvent the continued use of virgin REE in the final production steps for novel magnets. Overall, it is recommended that locations of recycling operations should be pursued for each process relative to energy and water usage needs, as well as transportation distance from wind farms.
ContributorsSavel, Cassandra Deanne (Author) / Agusdinata, Datu Buyung (Thesis director) / Iloeje, Nwike (Committee member) / School of Sustainability (Contributor) / Barrett, The Honors College (Contributor)
Created2020-12