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| Preparation and Properties of Super-hydrophobic Surface on Warship Steel |
| LIAN Feng TAN Jiazheng ZHANG Huichen** |
| (College of Transportation Equipment and Ocean Engineering, Dalian Maritime University, Dalian 116026) |
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Cite this article:
LIAN Feng TAN Jiazheng ZHANG Huichen**. Preparation and Properties of Super-hydrophobic Surface on Warship Steel. Chinese Journal of Materials Research, 2013, 27(1): 13-17.
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Abstract ABSTRACT Laser modification was conducted to build micro-structure textures on the warship steel surface. Nano-SiO2 powders were dispersed in a low surface energy fluoropolymers to form a polymer-based nanocomposites, and coated on the textured surfaces to build the micro-nano bionic structure for the super- hydrophobic surface. The micrograph and elements were investigated by optical microscope, scanning electron microscopy and X-ray photoelectron spectroscopy. The contact angles and roll angles were measured. The results show that the surfaces of the micro-nano structure have bigger contact angle than that of those with a single micron or nano-structure surfaces. The contact angles increase with increasing SiO2 concentration. When the concentration of SiO2 is 0.167 mol/L, the contact angle is as high as 168.2°. Single micron and nano-structured surface accords with the Wenzel model. Even if the surface is placed vertically, the droplet does not roll. The surfaces of the micro-nano structure satisfy the Cassie model, and possess large contact angle and small roll angle. The roll angle decreases with increasing SiO2 concentration. When the concentration of SiO2 is 0.167 mol/L, the roll angle is only 0.29°.
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