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Master Thesis--Yingfan Zhong.pdf (1.44 MB)

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LAYER-BY-LAYER ROSE PETAL MIMIC SURFACE FOR OIL/WATER SEPARATIONS

Zhong, Yingfan
http://rave.ohiolink.edu/etdc/view?acc_num=akron1468441832

Abstract Details

2016, Master of Science in Polymer Engineering, University of Akron, Polymer Engineering.
Some flower petal surfaces, such as rose petals, are known to be hydrophobic surfaces with a high static contact angle as well as high adhesion with respect to water drops. Here, we present a rose petal mimic surface via layer-by-layer (LbL) assembly, which maintains similar wetting properties as this kind of rose petal surfaces. Based on the mechanism of hydrophobicity and adhesion characteristics, the artificial surfaces are fabricated by ethylene-co-methacrylic acid (EMAA) ionomer particles in a colloidal dispersion and polyethyleneimine (PEI). The resultant surface presents hierarchical roughness on two different length scales and then forms hierarchical surface structure, which results in the hydrophobicity (for glass substrates, contact angle of 2 µL water droplet is ~140°) as well as good water pinning properties. As this surface is oleophilic and hydrophobic at the same time, it can be used for oil/water separations. In this research, we are trying to find the optimal conditions for EMAA dissolving in tetrahydrofuran (THF) and compare the performances of oil/water separations upon a series of LbL films prepared. The separation efficiency of free oil and water can achieve as high as 90% excluding the oil that the membranes can hold. This kind of PEI/EMAA multilayer membranes also show promising effects on oil/water emulsion separations.
Nicole Zacharia, Dr. (Advisor)
Alamgir Karim, Dr. (Committee Member)
Bryan Vogt, Dr. (Committee Chair)
65 p.
Polymers
layer-by-layer, rose petal, hydrophobic, oleophilic, oil water separation

Recommended Citations

Citations

  • Zhong, Y. (2016). LAYER-BY-LAYER ROSE PETAL MIMIC SURFACE FOR OIL/WATER SEPARATIONS [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1468441832

    APA Style (7th edition)

  • Zhong, Yingfan. LAYER-BY-LAYER ROSE PETAL MIMIC SURFACE FOR OIL/WATER SEPARATIONS . 2016. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1468441832.

    MLA Style (8th edition)

  • Zhong, Yingfan. "LAYER-BY-LAYER ROSE PETAL MIMIC SURFACE FOR OIL/WATER SEPARATIONS ." Master's thesis, University of Akron, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1468441832

    Chicago Manual of Style (17th edition)

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