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 21 for “"Vat Photopolymerization"”.
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Advancing Vat Photopolymerization of Photosensitive Polyimides: Process-Structure-Property Relationships
Vat photopolymerization (VPP) is a robust additive manufacturing (AM) technology which can produce products with high resolution features, smooth service finish, and at relatively high throughput. These advantages are leveraged in applications like jewelry manufacturing as well as dental and …
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Enabling Soft Mechanosensing via Vat Photopolymerization 3D Printing: Materials, Design and Integration
L'abstract è presente nell'allegato / the abstract is in the attachment
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Development and fabrication of self-healing hydrogels via vat photopolymerization 3D printing technology
L'abstract è presente nell'allegato / the abstract is in the attachment
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Designing Scaffolds for Directed Cell Response in Tissue Engineering Scaffolds Fabricated by Vat Photopolymerization
Vat photopolymerization (VP) is an additive manufacturing (AM) technology that permits the fabrication of parts with complex geometries and feature sizes as small as a few microns. These attributes make VP an attractive option for the fabrication of scaffolds for tissue engineering. However, there …
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Investigating the Process-Structure-Property Relationships in Vat Photopolymerization to Enable Fabrication of Performance Polymers
Vat photopolymerization's (VP) use in large-scale industrial manufacturing is limited due to poor scalability, and limited catalogue of engineering polymers. The challenges in scalability stem from an inherent process paradox: the feature resolution, part size, and manufacturing throughput cannot …
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Vat Photopolymerization of High-Performance Materials through Investigation of Crosslinked Network Design and Light Scattering Modeling
… resins limits the accessible properties for vat photopolymerization (VP) materials required for engineering applications. This has limited the adoption of VP for producing end-use parts, which typically require high MW polymers and/or more stable chemical functionality. Decoupling the …
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Manufacture and Characterization of Additively Manufactured Ceramic Electromagnetic Structures
… dielectrics with complex shapes that enable innovative microwave applications such as resonators, filters, and metamaterial lenses. This thesis addresses the production and characterization of cellular structures of various designed densities created with a low loss ceramic material, alumina …
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Synthetic Design of Multiphase Systems for Advanced Polymeric Materials
… manufacture reinforced elastomers through vat photopolymerization using a degradable scaffold approach that challenged the current paradigm that the scaffold only serves as a geometrical template in vat photopolymerization. The scaffold crosslinks were cleaved through a reactive extraction …
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Structure-property-processing relationships between polymeric solutions and additive manufacturing for biomedical applications
… together, but disconnect with heat or solvation. Taking into consideration some of these polymer functionalities, this dissertation investigates how to utilize them to create functional biomedical products using AM. The investigation of structure-property-processing relationships of …
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Development of Additively Manufactured Quadrupole Mass Filters for Low-Cost and High-Performance Applications
… QMF by means of additive manufacturing. Vat photopolymerization of glass-ceramic feedstock was used to create a novel, monolithic structure, and selective electroless nickel-boron plating metallizes the structure, forming a completed QMF that is lightweight and inexpensive to produce (20 …
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Embeddable Multi-Material Wireless Micro-Sensors Utilizing Additive Manufacturing and Enhanced Microstructure
… into polymer substrates. By utilizing the vat photopolymerization process, customized embedded sensors are seamlessly integrated into polymer AM structures. These sensors are then continuously refined, targeting increases in performance, both internal and external. Microstructural …
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Materials and processes for the optical additive manufacturing of advanced organic/inorganic nanocomposites for the mask-less plating of insulator and semiconductor substrates, and microfluidic devices
… used in this work is Stereolithography (SL), a vat photopolymerization technique that uses UV light to produce objects with resolution in the range 10-100 µm. Here, the novelty consists in adding a metallic precursor (KAuCl4) to a typical photosensitive resin to produce nanocomposites with gold …
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Designing Multiphase Step-Growth Polymers for Advanced Technologies: From Electromechanical Transducers to Additive Manufacturing
… AM dependent on the backbone composition. Vat photopolymerization (VP) AM served as a technique to 3D printed novel unsaturated polyester resins (UPR). Incorporating a phosphonium ionic liquid as a reactive diluent replaced styrene and reduced the volatility of commonly used UPRs. VP …
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Non-Covalent Interactions in the Design and Performance of Macromolecules for Biological Technologies
… interactions demanded further examination in the photopolymerization of monofunctional monomers to create free-standing films. Furthermore, the incorporation of both hydrogen bonding acrylamides and ionic groups provided faster polymerization times and higher moduli films upon light irradiation. …
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Designing Functionality into Step-Growth Polymers from Liquid Crystallinity to Additive Manufacturing
… the 3D printing of the polysulfones using vat photopolymerization.
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Tailoring Siloxane Functionality for Lithography-based 3D Printing
… reaction possesses many desirable traits for vat photopolymerization (VP) AM, namely that it proceeds rapidly to high yield, does not undergo significant side reactions, remains tolerant of the presence of water or oxygen, and remains regiospecific. Leveraging these traits, a novel PDMS-based …
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Experimental and numerical investigation of steady-state and transient ultrasound directed self-assembly of spherical particles in a viscous medium
… using ultrasound DSA in combination with vat photopolymerization (VP). We show that the steady-state local particle packing density increases with increasing particle volume fraction and increases with decreasing particle size. We also show that the transient local particle packing density …
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Tailoring Reactivity, Architecture and Properties of High Performance Polyimides: From Additive Manufacturing to Graft Copolymers
… performance polyimides and polyetherimides using vat photopolymerization (VP). The use of small molecule precursors over previously investigated polymeric precursors displayed much lower solution viscosities yielding reduction of organic solvent loading, inducing lower overall shrinkage. Polysalts …
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Advancing Elastomers to Additive Manufacturing Through Tailored Photochemistry and Latex Design
… addressed by traditional polymeric materials. Vat photopolymerization (VP) represents a leading AM platform which yields high geometric resolution, surface finish, and isotropic mechanical properties. However, this process requires low viscosity (<20 Pa·s) photocurable liquids, which generally …
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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
… and limited material selection. A hybrid DIW + Vat Photopolymerization system is presented to improve the feature size and topographical complexities of parts, while still retaining UV-DIW's ability to print with very high viscosity photoresins (Chapter 9). A high temperature Heated-DIW system …
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