Preparation of a superhydrophobic rough surface |
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Authors: | Hoon Joo Lee Stephen Michielsen |
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Affiliation: | 1. College of Textiles, North Carolina State University, 2401 Research Drive, Raleigh, North Carolina 27695‐8301;2. College of Textiles, North Carolina State University, 2401 Research Drive, Raleigh, North Carolina 27695‐8301College of Textiles, North Carolina State University, 2401 Research Drive, Raleigh, North Carolina 27695‐8301 |
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Abstract: | The relationship between the contact angles, surface tension, and surface roughness is reviewed. Numerical formulas related to the superhydrophobic rough surfaces of polymers are predicted with two approaches, the Wenzel and Cassie–Baxter models. With these models as a guide, an artificial superhydrophobic surface is created. Rough nylon surfaces mimicking the lotus leaf are created by the coating of a polyester surface with nylon‐6,6 short fibers via the flocking process. Poly(acrylic acid) chains aregrafted onto nylon‐6,6 surfaces, and this is followed by the grafting of 1H,1H‐perfluorooctylamine onto the poly(acrylic acid) chains. Water contact angles as high as 178° are achieved. © 2006 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 45: 253–261, 2007. |
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Keywords: | contact angles fibers films high performance polymers nylon‐6,6 1H,1H‐perfluorooctylamine polyamides superhydrophobic surface tension surfaces |
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