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Fabrication and Properties of Super-hydrophobic and Hierarchical Structure Coatings

Author: DiZhiYong
Tutor: HeJianPing
School: Nanjing University of Aeronautics and Astronautics
Course: Applied Chemistry
Keywords: Superhydrophobic Bionic Micro and nano structures Coating Anti-corrosion
CLC: TG174.4
Type: Master's thesis
Year: 2010
Downloads: 338
Quote: 1
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Abstract


Thesis hydrophobic nature Super phenomenon from the point of view of bionics , a series based on the different types of materials , the superhydrophobic surface preparation method . Nanoscale self-assembled functional siloxane hydrolyzed to form silanol coupling agent, γ-aminopropyl triethoxysilane (silane coupling agent KH550) , polytetrafluoroethylene (PTFE) sintered to form the fibers and siloxane reunion micron particle binding , preparation of a super - hydrophobic coating having a surface topography of the imitation lotus , the static water contact angle of 152 ° , the rolling angle of approximately 5 ° . By coating the surface morphology of the scanning electron microscope and found that the secondary structure of the coating with micro / nano . Through the contact angle of the test , and to explore the relationship between the microscopic surface structure and coating hydrophobic properties . Electrochemical AC impedance spectroscopy (EIS) analysis covered with a coating of the corrosion behavior of the specimens in the simulated corrosion environment , the results show that the specimen corrosion current 3-4 orders of magnitude lower than bare steel , has good corrosion resistance. Soluble phenolic resin precursor , F127 as template ordered mesoporous carbon films were prepared on a stainless steel substrate , and as a base , respectively, after activation of the the distributed processing carbon nanotubes and synthesis of glucose carbon spheres the filling phase , to build a super-hydrophobic surface micro - nano composite structure required superhydrophobic coating and surface chemical modification . Superhydrophobic material prepared surface structure and surface chemical composition by field emission scanning electron microscopy and other effects of corrosion protection in corrosive environments . Composite coating, wherein the filling phase to the carbon nanotube surface having vertically grown carbon nano - array structure , internal trapping a large amount of air , the actual contact area is only 6.82% , the contact angle of up to 165 ° , has an excellent self-cleaning , compared to the ordinary non - super-hydrophobic coating, having more excellent protective properties .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > Metal corrosion protection,metal surface treatment > Corrosion control and protection > Metal surface protection technology
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