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Design and Fabrication of Water and Oil Separation Membranes Using Nano Technology and Wettability Properties of Surfaces

Heydari, Mohammad Reza | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54848 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Moosavi, Ali
  7. Abstract:
  8. Due to population growth, the demand for water supply has increased. This need has drawn attention to the use of consumed and treatable water resources. Organic pollutants are a key source of water pollution. On the other hand, petrochemical oil pollution and frequent oil accidents during oil production or maritime transport have become one of the environmental problems.There are different methods for water and oil separation and water purification that in the present project, selective separation can be achieved by using hydrophobic materials and surface roughness and creating surfaces with two properties: superhydrophobic and ultra-oil friendly. This method is also very effective, cheap and simple. Using M sio _2 nanoparticles modified and hydrophobic with HMDS material and using hydrophobic material PDMS and furnace chlorine, epoxy and polyurethane resins coated on three stainless steel meshes to separate water and The coated oils were also compared for mechanical and chemical durability, greater adhesion to the nanoparticles, and the rate of wettability and slip. Wetting angles of all three surfaces are almost close to each other and are 153.5, 152 and 152, respectively, and slip angles in all three meshes are less than 4 degrees.After 48 hours of ultrasonic mesh coating with furnace chlorine resin, the mesh surface is only 5 degrees reduced contact angle, which indicates the mechanical stability of the ultrasonic device. In comparison, the mechanical stability of chlorinated resin solution coatings, polyurethane resin solution and epoxy paint resin solution were tested by ultrasonic device and have 150 hours, 140 hours and 140 hours of resistance to coating loss, respectively. In terms of resistance to acidic and alkaline environments, the solution impregnated mesh with chlorine resin furnace against acidic solution has a drop angle of more than 150 degrees and is resistant to acidic environment, but in the game environment the contact angle decreases below 150 degrees. Also, the hardness measured with a pencil hardness tester in mesh impregnated with a solution containing furnace chlorine resin, polyurethane resin and epoxy paint resin is equal to: 4B, 5B, 5B, respectively. Therefore, the physical durability and strength of the chemical bond in the mesh impregnated with the solution has a higher chlorine resin furnace than other solutions. In the discussion of water and oil separation, the samples have separation efficiency higher than 90%
  9. Keywords:
  10. Nanoparticles ; Separation ; Epoxy Resin ; Superhydrophobicity ; Polyurethane ; Ultra-Oil Friendly ; Furnace Resin ; Wetting ; Oil and Water Separation

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