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POLYMERIC MICRO-/NANO-FIBERS AND FILTERS PRODUCED USING MELT-BASED TECHNOLOGIES

Wang, Jia
http://rave.ohiolink.edu/etdc/view?acc_num=case1464870852

Abstract Details

2016, Doctor of Philosophy, Case Western Reserve University, Macromolecular Science and Engineering.
A novel co-extrusion and 2-dimensional multiplication technique was created to develop continuous micro-/nano-fibrous tapes and fibrous filters. Because of their continuous feature, these fibers can be post-oriented and have their mechanical properties drastically improved, thus see wider potential applications than regular solvent-based preparation techniques. Polycaprolactone (PCL), polyamide 6 (PA6) / polyethylene terephthalate (PET), polyethylene (PE) / polypropylene (PP), PA6 / polyethylene oxide (PEO), and PA6/PP fiber systems were produced for various applications, including cell culture scaffold, dental floss, and fuel filters. The PA6/PEO dental tapes have superior and tunable mechanical properties due to improved PA6 crystal orientation. A mechanical separation technique was developed for the separation of the micro-/nano-fibers. These PCL, PA6, PET, PP, and PE micro-/nano-fibers have rectangular-shaped cross sections and micro-to-nano-scale fiber lateral dimensions, thus have superior surface area. The PP/PA6 fuel filters have structural integrity and uniform fiber distribution. The orientation procedure greatly improves the PP/PA6 crystal orientation, decreases the fiber sizes, and enhances their mechanical performance as filters. These filters have microscale pore size, large porosity, superior surface area, and tough mechanical properties. Due to these advantageous characteristics, the PP/PA6 filter shows improved filtration performances in comparison with a commercial fuel filter at the same pressure drop. Increasing the filter thickness improves the filtration efficiency of water in diesel at a higher pressure drop. Treating the filter surface using corona treatment produces more hydrophilic surfaces that reduces the filtration efficiency because of difficult water drop release due to the excessive wettability. The filtration mechanism was studied, and it has been found that the desired fuel filter media have small pore sizes and large surface area for droplet capture, a hydrophobic nature for successful droplet release, and a high porosity for minimizing the pressure drop.
Eric Baer (Advisor)
David Schiraldi (Committee Member)
James Anderson (Committee Member)
Jon Pokorski (Committee Member)
187 p.
Engineering; Plastics; Polymers
Polymer; Fiber; Filter

Recommended Citations

Citations

  • Wang, J. (2016). POLYMERIC MICRO-/NANO-FIBERS AND FILTERS PRODUCED USING MELT-BASED TECHNOLOGIES [Doctoral dissertation, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case1464870852

    APA Style (7th edition)

  • Wang, Jia. POLYMERIC MICRO-/NANO-FIBERS AND FILTERS PRODUCED USING MELT-BASED TECHNOLOGIES. 2016. Case Western Reserve University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case1464870852.

    MLA Style (8th edition)

  • Wang, Jia. "POLYMERIC MICRO-/NANO-FIBERS AND FILTERS PRODUCED USING MELT-BASED TECHNOLOGIES." Doctoral dissertation, Case Western Reserve University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1464870852

    Chicago Manual of Style (17th edition)

case1464870852
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© 2016, all rights reserved.
This open access ETD is published by Case Western Reserve University School of Graduate Studies and OhioLINK.