FABRICATION OF ASYMMETRIC CERAMIC MEMBRANES VIA INDIRECT ADDITIVE MANUFACTURING

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dc.contributor.advisorLiu, Dongxiaen_US
dc.contributor.advisorLazarus, Nathanen_US
dc.contributor.authorrichard, patricken_US
dc.contributor.departmentChemical Engineeringen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2023-02-01T06:48:04Z
dc.date.available2023-02-01T06:48:04Z
dc.date.issued2022en_US
dc.description.abstractA dearth of literature regarding the fabrication of separation membranes via indirect additive manufacturing undermines the significant progress made by 3D technologies to improve resolution, printing time, and ease of operation. That is to say, the benefits of 3D printing may be realized even with an indirect route. This thesis aims to employ bench-scale stereolithography (SLA) to print a mold design that may be combined with a conventional technique to consistently yield viable alumina membrane supports for separation application. An iterative approach was applied to mitigate potential sources of variability, including poor mold design, mold casting, and ceramic substrate coating. Once the procedure was established, multiple alumina supports were fabricated, characterized, and coated with zeolite A(LTA) separation layers for pervaporation separations. The alumina supports demonstrated highly-ordered macroscopic structures, asymmetric microstructures, acceptable dimensional shrinkage (15.4%-18.5%), moderate density (2.89g/cm3), and good porosity (35.5%). The LTA-coated asymmetric membrane exhibited excellent separation performance with a flux of 0.800 kg/(m2•h) and a separation factor of 5190 for the pervaporation separation of an ethanol-water mixture. Although the generalizability is limited to other high-resolution bench-scale SLA printers, it is clear that high-quality ceramic separation membranes or substrates may be fabricated with an indirect additive manufacturing approach. Thus, the findings of this thesis provide a highly repeatable and reproducible fabrication pathway for challenging materials and geometries while still exploiting the unparalleled precision and control of 3D printing.en_US
dc.identifierhttps://doi.org/10.13016/xaos-lfii
dc.identifier.urihttp://hdl.handle.net/1903/29650
dc.language.isoenen_US
dc.subject.pqcontrolledChemical engineeringen_US
dc.titleFABRICATION OF ASYMMETRIC CERAMIC MEMBRANES VIA INDIRECT ADDITIVE MANUFACTURINGen_US
dc.typeThesisen_US

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