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 “"drop on demand"”.
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Positive pressure drop-on-demand printhead for Three-Dimensional Printing
In drop-on-demand printing, wetting out of the binder fluid onto the orifice face typically has been prevented by some combination of the following: coatings on the orifice face, high surface energy fluids, and negative pressure. This non-wetting approach is not practical for low surface energy …
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Drop-on-demand ink jet printing for three dimensional printer application
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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Design of a drop-on-demand delivery system for molten solder microdrops
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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Vector drop-on-demand production of tungsten carbide-cobalt tooling inserts by three dimensional printing
Three Dimensional Printing (3DP) is a solid freeform fabrication process used to generate solid parts directly from three-dimensional computer models. A part geometry is created by selectively depositing binder into sequentially spread layers of powder. In slurry-based 3DP, a suspension of powder …
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Formulation of oral dosage forms by three dimensional printing
… grade materials were used in the fabrication of fast-release and extended-release oral dosage forms. Tablets were processed by employing a method of solid freeform fabrication known as three dimensional printingTM (3DPTM). A microcrystalline cellulose powder was used in combination with …
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Probing early human embryonic development to characterize BMP signaling stimulators
Bone morphogenetic proteins (BMPs) sind sowohl in der Embryonalentwicklung als auch im adulten Organismus von entscheidender Bedeutung. Da ein fehlregulierter Signalweg mit zahlreichen chronischen und schwerwiegenden Krankheiten assoziiert ist, stellt dessen Modulierung einen vielversprechenden …
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Printing Conductive Paths for Electronic Functional Devices
… and scientists as an alternative to the conventional photolithography and electroless deposition methods due to the complications, time-consuming, size restrictions and high costs that these methods usually experience. Soft lithographic techniques and inkjet printing technology have …
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MANUFACTURE OF INDIVIDUALIZED DOSING: DEVELOPMENT AND CONTROL OF A DROPWISE ADDITIVE MANUFACTURING PROCESS FOR MELT BASED PHARMACEUTICAL PRODUCTS
… in healthcare systems and the advent of precision medicine initiative have created the need to develop more innovative manufacturing methods for the delivery of individualized dosing and personalized treatments. In recent years, the US Food and Drug Administration (FDA) introduced the Quality by …
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Preparation and characterisation of inks for let printing onto textile materials
The feasibility of using thermal drop-on-demand ink jet printing to print pigmented ink systems onto textile materials was investigated. Preliminary studies showed that a novel binder system, Synthappret BAP (traditionally used as a shrink resist treatment for wool), could be successfully …
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Inkjet printing: technique and applications for organic electronic devices
Since the discovery of the polyacetylene conductivity in 1977 by Shirakawa,MacDiarmid and Heeger, Organic Electronics has been growing and establishing for a new generation of electronic devices. On one hand, the unique properties of polymeric semiconductors and conductors, such as flexibility and …
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On the electrohydrodynamics of drop extraction from a conductive liquid meniscus
This thesis is concerned with the use of an electric field in the extraction of liquid drops from a capillary orifice or nozzle. The motivating application is ink jet printing. Current drop-on-demand ink jets use pressure pulses to eject drops. Literature on electrostatic spraying suggests that by …
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TopSpot Vario: A novel microarrayer system for highly parallel picoliter dispensing
This thesis reports about the conceptional design, development and characterization of a novel system for production of microarrays, a so called microarrayer system. In the recent years microarray technology had a high impact in basic research, diagnostics and drug discovery. Its success caused …
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Maintaining Functionality of Biological Materials during Fluid–based Manufacturing
Drop on demand inkjet printing and extrusion–based printing enable 2D and 3D structures to be produced with high spacial resolution, highly applicable for the pharmaceutical industry where constructs can be used for tissue engineering, drug discovery and drug delivery applications. However, both of …
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Design of a slurry layer forming station and improved fluid handling system for raster processes in 3DP®
Three-Dimensional Printing (3DPTM) is a rapid-manufacturing process originally developed at MIT for building parts directly from CAD-generated models. Parts are fabricated in "slices" by creating a complete layer of powder and then selectively joining powder particles with a polymer binder …
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Three dimensional printing with fine metal powders
… has several inherent advantages over traditional machining and P/M technologies: hard tooling is not required to manufacture parts, geometries may be created which can not be made by conventional processes, and the composition of parts may be controlled locally on a 100 gm scale. The surface …
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Cellulose Nanocrystals: Size Characterization and Controlled Deposition by Inkjet Printing
Inkjet printing has generated considerable interest as a technique for the patterning of functional materials in the liquid phase onto a substrate. Despite its high promise, the phenomena associated with inkjet printing remain incompletely understood. This research project investigates inkjet …
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Fluid characterisation and drop impact in inkjet printing for organic semiconductor devices
… a very small volume of liquid with high positional accuracy, high speed and low cost. As a maskless, non-contact additive patterning method, inkjet printing technology is increasingly being explored as an alternative to lithography, etching and vapour deposition processes to pattern electrical …
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Fluido imprimível bioinspirado no mecanismo de iridescência de peixes do gênero Paracheirodon
… de iridescência de peixes do gênero Paracheirodon, endêmico da Bacia Amazônica, para impressão por tecnologia de Drop-on-Demand (DoD), utilizando-se uma impressora de materiais. A iridescência da faixa lateral desses peixes apresenta variação de cor em função de estímulos que provocam mudanças …
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Ink jet printing of PZT thin films for MEMS
… engineering materials perovskite phase lead zirconate titanate (PZT) has the strongest mechanical to electrical coupling. PZT based devices have the potential to have the highest performance. Due to the strong piezoelectric response and low operating voltage, many groups have worked to integrate …
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