Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


akron1341290657.pdf (4.51 MB)

ETD Abstract Container

Abstract Header

Control and Characterization of Textured, Hydrophobic Ionomer Surfaces

Wang, Xueyuan
http://rave.ohiolink.edu/etdc/view?acc_num=akron1341290657

Abstract Details

2012, Doctor of Philosophy, University of Akron, Polymer Engineering.
Polymer thin films are of increasing interest in many industrial and technological applications. Superhydrophobic, self-cleaning surfaces have attracted a lot of attention for their application in self-cleaning, anti-sticking coatings, stain resistance, or anti-contamination surfaces in diverse technologies, including medical, transportation, textiles, electronics and paints. This thesis focuses on the preparation of nanometer to micrometer-size particle textured surfaces which are desirable for super water repellency. Textured surfaces consisting of nanometer to micrometer-sized lightly sulfonated polystyrene ionomer (SPS) particles were prepared by rapid evaporation of the solvent from a dilute polymer solution cast onto silica. The effect of the solvent used to spin coat the film, the molecular weight of the ionomer, and the rate of solvent evaporation were investigated. The nano-particle or micron-particle textured ionomer surfaces were prepared by either spin coating or solution casting ionomer solutions at controlled evaporation rates. The surface morphologies were consistent with a spinodal decomposition mechanism where the surface first existed as a percolated-like structure and then ripened into droplets if molecular mobility was retained for sufficient time. The SPS particles or particle aggregates were robust and resisted deformation even after annealing at 120¿¿¿¿C for one week. The water contact angles on as-prepared surfaces were relatively low, ~ 90¿¿¿¿ since the polar groups in ionomer reduce the surface hydrophobicity. After chemical vapor deposition of 1H,1H,2H,2H-perfluorooctyltrichlorosilane, the surface contact angles increased to ~ 109¿¿¿¿ on smooth surfaces and ~140¿¿¿¿ on the textured surfaces. Water droplets stuck to these surfaces even when tilted 90 degrees. Superhydrophobic surfaces were prepared by spraying coating ionomer solutions and Chemical Vapor Deposition (CVD) of 1H,1H,2H,2H-perfluorooctyltrichlorosilane onto textured surfaces. The surfaces after CVD of silane exhibited water contact angle of 152¿¿¿¿ and the water droplet stuck to the surfaces without falling even when tilted upside down. This kind of sticky superhydrophobic surface would have potential applications in no-loss transport of liquid, and cleaning robots.
Robert Weiss, Dr. (Advisor)
Alamgir Karim, Dr. (Committee Chair)
Kevin Cavicchi, Dr. (Committee Member)
Matthew Becker, Dr. (Committee Member)
Chrys Wesdemiotis, Dr. (Other)
144 p.
Polymers
Superhydrophobic Surfaces; Ionomer; Spin Coating; Sticky

Recommended Citations

Citations

  • Wang, X. (2012). Control and Characterization of Textured, Hydrophobic Ionomer Surfaces [Doctoral dissertation, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1341290657

    APA Style (7th edition)

  • Wang, Xueyuan. Control and Characterization of Textured, Hydrophobic Ionomer Surfaces. 2012. University of Akron, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1341290657.

    MLA Style (8th edition)

  • Wang, Xueyuan. "Control and Characterization of Textured, Hydrophobic Ionomer Surfaces." Doctoral dissertation, University of Akron, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1341290657

    Chicago Manual of Style (17th edition)

akron1341290657
708
© 2012, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.