Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"Direct Ink Write"”.
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Enabling New Material and Process Capabilities for Ultraviolet-Assisted Direct Ink Write Additive Manufacturing via Exploration of Material Rheology and Reactivity
Ultraviolet-Assisted Direct Ink Write (UV-DIW) is a material extrusion additive manufacturing (AM) technology in which a viscous ink, often at room temperature, is selectively extruded through a translating nozzle to selectively deposit material. The extruded ink is solidified via UV irradiation …
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Cellulose Nanofoams: 3D Printing and Characterization
… three-dimensional (3D) structures using direct-ink-write (DIW) technology and molding. We developed composite nanofoams using TEMPO-modified cellulose nanofiber (TCNF). The resultant composite nanofoams showcased remarkable properties such as ultra-low thermal conductivity, low density, …
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On Demand Liquid Metal Programming for Composite Property Tuning
… work we describe the process by which we use Direct Ink Write (DIW) technology, a type of additive manufacturing, to print 2D and 3D LM composites with tunable properties. The design map used to control LM microstructure in-situ is first outlined in Chapter 2. This tuning ability is used to …
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Effect of Dispersion on Rheology and 3D Printing of Chitosan-Graphene-Titanium Dioxide Composites
… additive manufacturing (AM) process called direct ink write (DIW) with polymer composite ink, it is possible to create parts with tailored internal microstructures that enhance surface area and particle-particle adsorption kinetics for water remediation applications. However, DIW of …
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Characteristic Modes for Impedance Matching and Broadbanding of Electrically Small Antennas
… structures printed on a curved surface using a direct-ink write process. Finally, to circumvent some of the bandwidth limitations imposed on small antennas, we propose an approach to design multimode antennas. Estimates are derived for the bandwidth increases that can be achieved with this …
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Characterization of the Integration of Additively Manufactured All-Aromatic Polyimide and Conductive Direct-Write Silver Inks
… additive manufacturing (AM) structures and direct write (DW) deposition of conductive traces enables the design and physical creation of integrated, complex, and conformal electronics such as embedded electronics and complex routing on a fully AM structure. Although this hybridization has a …
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Rheology of Filled and Unfilled Polyurethanes for Reactive Extrusion-Based Applications
… manufacturing (AM) is a form of production that directly processes raw materials into their final form by building the product in a layer-by-layer fashion. Numerous types of AM exist, including selective laser sintering (SLS) of polymeric powders, vat polymerization (VP) of low viscosity …
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Patterning temporally dynamic 4D hydrogel and nanocomposite material gradients: predictive cellular and actuator responses
Direct-Ink Writing (DIW) is a facile form of additive manufacturing that elevates three-dimensional (3D) printed structures into materials regimes whose chemistries enable them to be temporally dynamic (4D). A series of dynamic material systems is prepared that applies DIW methodologies and design …
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Tailoring Reactivity, Architecture and Properties of High Performance Polyimides: From Additive Manufacturing to Graft Copolymers
… poly(amide imides) via ultraviolet assisted direct ink write (UV-DIW) printing. Precursor resins exhibited prerequisite rheology and reactivity for UV-DIW and produced organogels were well-defined and self-supporting. Thermal treatment induced drying and imidization of the precursor …
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Additive Manufacturing Filled Polymer Composites for Environmental Contaminants: Material Extrusion Processing, Structure and Performance
… studies for additional AM technologies (e.g., Direct Ink Write).
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Low temperature manufacturing of ferrite-epoxy inductor cores by micro-robotic deposition
… rheological properties required of the composite inks used for target components. A ferrite-epoxy composite ink consisting of micron-sized carbonyl iron powder and a common industrial epoxy matrix, Bisphenol-A diglycidyl ether (DGEBA)/ Diethylene Triamine (DETA), is used with a rheology modifier …
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Advancing Elastomers to Additive Manufacturing Through Tailored Photochemistry and Latex Design
… weight of linear network strands between crosslink points (Mc) and diminishes the mechanical and elastic performance of VP printed objects. Polymer colloids (latex) effectively decouple the relationship between viscosity and molecular weight by sequestering large polymer chains within discrete, …
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Processing to Enable Direct-Write Additive Manufacturing of Ceramics and Ceramic Composites
… processing of novel feedstocks for and during direct-write additive manufacturing (AM), specifically the direct ink writing (DIW) and Ceramic On-Demand Extrusion (CODE) manufacturing processes, in order to produce ceramic and ceramic-based composite components. Strongly dispersed, concentrated …