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FABRICATION OF SLIPPERY LIQUID-INFUSED POROUS SURFACES USING LAYER-BY-LAYER ASSEMBLY: TOWARDS MULTIFUNCTIONAL SURFACES AND FACILE FABRICATION PROCESSES

Zhu, Geyunjian
http://rave.ohiolink.edu/etdc/view?acc_num=akron1518051453328934

Abstract Details

2018, Master of Science, University of Akron, Polymer Engineering.
Slippery liquid-infused porous surfaces (SLIPS) are bioinspired omniphobic surfaces that use a very thin layer of lubricant locked within the surface micro/nano structure to repel a variety of liquids. These surfaces could have a potential impact on a wide range of industries, including healthcare, food packaging, and automobile. In this master thesis, SLIPS are fabricated by the state-of-the-art layer-by-layer (LbL) assembly of polyelectrolytes. LbL assembly is a simple and fast thin film fabrication technique which is performed by sequential immersion of substrates into polyelectrolyte solutions. The studies presented here describe an effort to utilize LbL assembled polyelectrolyte multilayers (PEMs) to create multifunctional SLIPS and on developing novel LbL system in organic solvent to achieve a facile, fast, and scalable fabrication of SLIPS. A novel gel-infused slippery surface with a gelator containing lubricant is demonstrated. This surface exhibits temperature-dependent and gelator concentration-dependent water drop sliding properties. In some cases, this means temperature dependent transition from water pinning to water sliding surfaces. The robustness of the lubricant layer against wash, a big concern for SLIPS, is proved to be enhanced by the addition of gelator, and an optimal 0.5 weight % concentration of gelator in mineral oil is found to best preserve the surface properties under a moderate shear flow. In addition to making multifunctional SLIPS, a tremendous effort has been focused on developing novel fabrication methods for making SLIPS. LbL assembly of branched polyethylenimine and Nafion is performed with methanol as the solvent. Hierarchically rough and superhydrophobic surface is obtained directly without further modification on various substrates. The surface properties are shown to highly depend on the LbL assembly parameters, including deposition cycles, dipping time, rinsing time, and drying time between baths. The polyelectrolyte multilayers obtained with this method is infused with Krytox®100 to form SLIPS surfaces, which show excellent omniphobic, antifouling, self-cleaning, flexible, and optical properties. The new method not only simplifies the fabrication of SLIPS surfaces, but also provides useful insight for making LBL films with specific morphologies.
Nicole Zacharia (Advisor)
Bryan Vogt (Committee Chair)
Kevin Cavicchi (Committee Member)
86 p.
Materials Science; Polymers
layer-by-layer; SLIPS; wettability

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Citations

  • Zhu, G. (2018). FABRICATION OF SLIPPERY LIQUID-INFUSED POROUS SURFACES USING LAYER-BY-LAYER ASSEMBLY: TOWARDS MULTIFUNCTIONAL SURFACES AND FACILE FABRICATION PROCESSES [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1518051453328934

    APA Style (7th edition)

  • Zhu, Geyunjian. FABRICATION OF SLIPPERY LIQUID-INFUSED POROUS SURFACES USING LAYER-BY-LAYER ASSEMBLY: TOWARDS MULTIFUNCTIONAL SURFACES AND FACILE FABRICATION PROCESSES. 2018. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1518051453328934.

    MLA Style (8th edition)

  • Zhu, Geyunjian. "FABRICATION OF SLIPPERY LIQUID-INFUSED POROUS SURFACES USING LAYER-BY-LAYER ASSEMBLY: TOWARDS MULTIFUNCTIONAL SURFACES AND FACILE FABRICATION PROCESSES." Master's thesis, University of Akron, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1518051453328934

    Chicago Manual of Style (17th edition)

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