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Fabrication of Composite Membrane through Integration of Carbon Nanotubes and Polysufone with Inversion

Russell, Amani J
http://orcid.org/0000-0002-2331-9693
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1573573872745355

Abstract Details

2019, MS, University of Cincinnati, Engineering and Applied Science: Materials Science.
Carbon nanotube (CNT)/polysulfone (PSF) composite membranes capable of being heated were fabricated as an alternative to a CNT/polycarbonate (PC) membrane of a previous study. Membranes were made with pore size in the ultrafiltration range, having pores small enough to remove bacteria and some viruses from water. The membranes were fabricated with non solvent induced phase separation in which dimethylformamide was used as a solvent and water was the non-solvent. N-methyl-pyrrolidone was also tested but was not used to fabricate the final membrane due to the formation of an undesired membrane morphology containing macrovoids. The PSF concentration tested for this application ranged from 15-17 wt%. PSF was cast on a porous sheet of carbon nanotubes consisting of 3 layers. The 15% sample had the best flux of all the samples tested. By selecting a concentration of 15% a pure water flux of 665 LMH was achieved at a pressure of 50 psi. The CNT/PSF membrane is capable of being heated to mitigate biofouling. The semiconducting character of the CNTs allowed for the CNTs to function as a heater by utilizing the process of Joule heating. By applying a potential of 19 V the temperature of the membranes can reach 113±14 °C. This process utilizes 1.82 W of power and can be sustained for more than 10 minutes. The temperature required to effectively kill off E. coli is 100 °C, a temperature achievable with the CNT/PSF membrane [1], [2]. The PSF glass transition temperature was determined to be 184.8±0.8 °C and the CNTs utilized do not oxidize lower than 633 °C, proving the materials will not thermally degrade under regular use. The CNT/PSF membrane was an improved version of the previous CNT/PC membrane. The CNT/PSF membrane had the same heating ability but was more selective, more thermally stable, mechanically stronger, and possessed a protective coating of the CNTs in the composite membrane.
Vesselin Shanov, Ph.D. (Committee Chair)
Noe Alvarez, Ph.D. (Committee Member)
Soryong Chae, Ph.D. (Committee Member)
Jude Iroh, Ph.D. (Committee Member)
60 p.
Materials Science
Carbon Nanotubes; Polysulfone; Ultrafiltration; Membranes; Fouling; Water purification

Recommended Citations

Citations

  • Russell, A. J. (2019). Fabrication of Composite Membrane through Integration of Carbon Nanotubes and Polysufone with Inversion [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1573573872745355

    APA Style (7th edition)

  • Russell, Amani. Fabrication of Composite Membrane through Integration of Carbon Nanotubes and Polysufone with Inversion. 2019. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1573573872745355.

    MLA Style (8th edition)

  • Russell, Amani. "Fabrication of Composite Membrane through Integration of Carbon Nanotubes and Polysufone with Inversion." Master's thesis, University of Cincinnati, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1573573872745355

    Chicago Manual of Style (17th edition)

ucin1573573872745355
123
© 2019, some rights reserved.Creative Commons License Fabrication of Composite Membrane through Integration of Carbon Nanotubes and Polysufone with Inversion by Amani J Russell is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Cincinnati and OhioLINK.