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 20 of 35 for “"direct ink writing"”.
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Direct ink writing of microvascular networks
… important. In this PhD thesis, the direct-write assembly of planar and 3D biomimetic microvascular networks within polymer and hydrogel matrices is demonstrated. In addition, the influence of network design of fluid transport efficiency is characterized. Planar microvascular networks …
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Direct Ink Writing of Functional Fiber/Granular Composites
<p>Direct ink writing provides a versatile manufacturing route for fabricating functional fiber and granular composites with controlled architecture, tunable interfaces, and customized material distributions. Fiber reinforced composites offer high stiffness, strength, fatigue resistance, and …
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High-resolution direct ink writing of soft conductive materials
… Traditional methods, such as drop casting or inkjet printing, rely primarily on printing 2D substrates. The gap between processability in two-dimensional and three-dimensional demands is required for new techniques such as 3D printing. In addition, 3D printing offers high freedom in geometry …
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Optimalizace procesu 3D tisku oxidu hlinitého metodou Direct Ink Writing
… technologií, a to především moderní technologie Direct Ink Writing tisku (DIW). Byly popsány podfunkce DIW tisku a vztah tisknutelnosti a reologie vhodných materiálů. V experimentální části byla běžná Fused Filament Fabrication 3D tiskárna přestavěna a přenastavena na DIW technologii. Dále byly …
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Three-Dimensional Direct Ink Writing of Low Viscosity Inks in a Polyvinyl Alcohol Suspension
… based composites makes it possible to directly construct high-resolution multi-functional parts with complex geometry and topological features, thus facilitates research and development of next generation soft electronics, biocompatible and biomaterial-based structures, and conductive …
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Effects of Water-Soluble Binders on Direct Ink Writing Silicon Anode in Lithium-Ion Batteries
… high theoretical specific capacity and employs direct ink writing (DIW), an additive manufacturing method, to fabricate intricate in-house anodes. These anodes are tailored for small electronics, sensors, or medical devices, highlighting the potential of DIW in creating complex-shaped …
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Analysis of slurry composition for the direct ink writing of mayenite electride for use in thermionic cathodes
… of an acetone-based slurry composition for direct ink writing (DIW). As the ink composition is critical to the success of any direct ink writing process, an in depth analysis was performed on mayenite slurries, which focused on different solvents, binders, and the dispersion of the ceramic …
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Direct-Write Assembly of Three-Dimensional Polyelectrolyte Scaffolds, Inorganic Hybrids, and Photonic Crystals
… 3D microperiodic polymer scaffolds assembled by direct ink writing. First, polymer woodpiles with a face-centered tetragonal geometry are fabricated by direct ink writing. Chemical vapor depositions of silica and germanium are then performed under controlled conditions to produce optimal layer …
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Functional Microperiodic Polyacrylamide Gels Fabricated by Opal Inversion and Direct-Write Processes
… yields an inverted FCC lattice of polymer, and direct ink writing (DIW) in which a continuous filament is patterned layer-by-layer into a defined structure.
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Topology optimization and physical realization of magnetically active soft materials: from reprogrammable metamaterials to biomedical robots
… distribution (selected from several candidate directions), and external magnetic field directions, enabling the design of soft robots and actuators. While the current implementation utilizes a reduced-order magnetic soft material constitutive model, the framework remains generalizable to more …
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Printing ferromagnetic domains in soft materials : mechanism, modeling, and applications
… magnetic actuation. This approach is based on direct ink writing of an elastomer composite containing hard ferromagnetic microparticles. By applying a magnetic field to the dispensing nozzle while printing, we make the particles reoriented along the applied field direction to impart patterned …
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Integrated multi-media platform for hybrid 3D printing
… Aerosol Jetting, Fused Deposition Modeling, Direct Ink Writing, Photopolymer Inkjet Printing and the non-additive processes of photonic curing and robotic pick and place. The increased functionality of printed parts relies on the properties of the build materials used. A silver based ink is …
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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 …
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3D-printed adsorbents for gas separations: A material development, kinetic assessment, and process performance investigation
… seeding and secondary MOF growth (Paper I), ii) direct ink writing of amine-modified MOFs (Paper II), iii) polymer seeding with MOF growth (Paper III), IV) MOF precursor incorporation into printable sol-gels with thermal coordination (Paper V), and v) binderless zeolite printing with sacrificial …
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Adaptable Network Systems
… approach, t-ZnO networks were fabricated via direct ink writing, preserving 3D connectivity within a 2D polymer matrix. The resulting flexible, freestanding films function as sensors for ultraviolet light and sustain over 100 bending cycles, demonstrating that robust connectivity facilitates …
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Nanoparticle Engineering of Colloidal Suspension Behavior
… exploited in the assembly of colloidal gels for direct ink writing and colloidal crystals on epitaxially patterned substrates. Finally, for the first time, we explore nanoparticle haloing as a new route for stabilizing hydrophobic colloidal drugs in aqueous suspensions media for preparation of …
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Biphasic Nanoparticle Inks for Direct Write Assembly of Three-Dimensional Periodic Structures
Novel nanoparticle inks have been created for the direct-write assembly of 3-D periodic structures with fine scale (∼ 10 mum) features. These nanoparticle inks are composed of two populations of nanoparticles defined by the type of dispersant used to stabilize them, either poly(acrylic …
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Efficiency, manufacturability, and modeling challenges in structural design optimization
… consistency of these methods. Both adjoint and direct differentiation methods are studied. In the second topic, we demonstrate a practical method for the optimization of fiber reinforced composite structures fabricated by additive manufacturing, that accommodate the manufacturability constraints …
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Hybrid inkjet and direct-write multi-material additive manufacturing
… additive manufacturing technologies - inkjet and direct-ink writing - are combined in a hybrid system. Several advantages are realized due to the increased material library and geometric freedom as a result of new printing modalities. Initially, models of each process are reviewed and …
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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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