Undergraduate Works

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Browsing Undergraduate Works by Subject "3D Printing"

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    Exploring the Morphology of High-Resolution 3D Printed Scaffolds for Tissue Engineering
    (University of Oregon, 2022) Ahn, Andrew; Dalton, Paul; Hettiaratchi, Marian; Jacobsen, Trond
    Three-dimensional (3D) printing or additive manufacturing (AM) is a technique that is commonly used within tissue engineering and regenerative medicine (TERM). Among AM techniques, melt electrowriting (MEW) is known for its high-resolution capabilities, which utilizes thermoplastic materials to produce scaffolds with microscale structures for tissue engineering (TE). Although more popular in recent years, MEW is still underdeveloped, causing the majority of MEW scaffolds utilized within TE to have a 0°/90° laydown pattern. This study explores different laydown pattern (0°/90°, 0°/60°/120°, and 0°/36°/72°/108°/144°) scaffolds made of poly(ε-caprolactone) (PCL) and how these scaffolds are morphologically different and affect cell seeding. The results show that cell seeding was similar between all of the different laydown patterns, with a more even distribution found in the 0°/36°/72°/108°/144°) scaffold due to the better 3D interconnectivity found in this design.
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    Novel Method for Additive Manufacture of Rubber with Exploration in Support Structure and Material Performance
    (University of Oregon, 2017) Hashiguchi, Sarah Elizabeth
    3D printing is a rapidly growing additive manufacturing process that offers advantages in customizability, sustainability, cost reduction, precision, and accessibility over traditional processes. The limitation of printable materials, however, is still a major barrier preventing 3D printing moving from creating prototypes to producing final products. My work addresses the need to 3D print with thermosets, specifically focusing on rubber. Initially printing proof of concept tests by hand informed the selection of a 3D printer machine to order for further tests. To showcase this new manufacturing process for rubber, I designed a new insulation material for wetsuits that would not have been possible before. I developed a method to print natural liquid latex by hand, and identified poly(tetrahydrofuran) as a compatible support material. The 3D printer will print rubber alone with minimal difficulties, however introducing support material into the same print has proved much more challenging due to additional complex coding. Moving forward print head obstruction, support material temperature, and gcode adjustments must be addressed to improve the resolution and consistency of the prints.