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Jonathan Rajala Dissertation.pdf (12.99 MB)

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ELECTROSPINNING FABRICATION OF CERAMIC FIBERS FOR TRANSPARENT CONDUCTING AND HOLLOW TUBE MEMBRANE APPLICATIONS

Rajala, Jonathan Watsell
http://orcid.org/0000-0002-4254-8037
http://rave.ohiolink.edu/etdc/view?acc_num=akron1480909959851349

Abstract Details

2016, Doctor of Philosophy, University of Akron, Chemical Engineering.
Electrospinning is a simple method used to produce ceramic nanofibers from a polymer precursor with reproducible results. In this work, ceramic aluminum oxide fibers are investigated for liquid phase separation membranes. The goal of this work is to produce hollow ceramic tubes by core-shell electrospinning. In this method, two distinct materials flow out of the core-shell electrospinning device coaxially and jet to form fibers when in the presence of an electrical field outside of the nozzle. The core of the fiber is a sacrificial polymer material that is burned off during a secondary calcination process used to convert the precursor shell material into a ceramic tubular structure. Polymer and ceramic materials have been used in membrane separation processes, but with tubes on the order of several hundred micrometers in diameter. With core-shell electrospinning processes, hollow fibers of several hundred nanometers to a few micrometers in diameter can be produced. These materials take advantage of the beneficial nanofiber properties of high surface area to volume as well as having a high curvature to create a more efficient separation process due to the amount of fiber surface area in contact with the process fluid. The goal for these materials is to produce a membrane for water desalination, which is a global problem facing many countries with insufficient fresh water supplies. These materials can be used as nano-filters, which do not require the high pressure operating conditions and energy consumption that the current method of reverse osmosis does. This research shows that more work is needed on these materials before their practical use in larger scale desalination applications.
George Chase (Advisor)
Edward Evans (Committee Member)
Chelsea Monty (Committee Member)
Shing-Chung Wong (Committee Member)
Rex Ramsier (Committee Member)
166 p.
Chemical Engineering
electrospinning; core-shell; core-sheath; aluminum oxide; hollow; tube; membrane; transparent conducting oxide; ITO; indium tin oxide; indium zinc oxide

Recommended Citations

Citations

  • Rajala, J. W. (2016). ELECTROSPINNING FABRICATION OF CERAMIC FIBERS FOR TRANSPARENT CONDUCTING AND HOLLOW TUBE MEMBRANE APPLICATIONS [Doctoral dissertation, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1480909959851349

    APA Style (7th edition)

  • Rajala, Jonathan. ELECTROSPINNING FABRICATION OF CERAMIC FIBERS FOR TRANSPARENT CONDUCTING AND HOLLOW TUBE MEMBRANE APPLICATIONS. 2016. University of Akron, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1480909959851349.

    MLA Style (8th edition)

  • Rajala, Jonathan. "ELECTROSPINNING FABRICATION OF CERAMIC FIBERS FOR TRANSPARENT CONDUCTING AND HOLLOW TUBE MEMBRANE APPLICATIONS." Doctoral dissertation, University of Akron, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1480909959851349

    Chicago Manual of Style (17th edition)

akron1480909959851349
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This open access ETD is published by University of Akron and OhioLINK.