Towards Robust Carbonaceous Films on Micro-textured Polymer Surfaces

6 Towards Robust Carbonaceous Films on Micro-textured Polymer Surfaces 

Melting of the polymer and/or the wax during flame impingement would allow the nanoparticles to get embedded into the polymer film and establish a better binding carbonaceous film compared to a film deposited on a ceramic or metallic surface which can be picked up by 

As mentioned earlier, flame synthesized carbon nanostructures demonstrate superhydrophobicity due to inherent hydrophobicity of carbon as well as the formation of dual-scale roughness during deposition. However, their main drawback is that nanostructured carbon materials do not form a firm bond with the surface upon which they are assembled, considerably reducing their practical applications in liquid repellent surface 

To test the hydrodynamic robustness of the surface, the samples were exposed to a 3.2 mm in diameter high-speed water jet with varying dynamic pressures. Contact angle measurements were taken at 10 second increments. Samples were exposed imtil saturation (pores start soaking up 

In the equations above, p, a and p stand for liquid density, surface tension and viscosity respectively, and d and U stand for the diameter of the liquid jet and the velocity of the impinging jet, respectively. The Weber and Reynolds numbers are comparatively high compared to other studies on impinging liquid jets on hydrophobic and superhydrophobic surfaces [15-17]. The radius of the non-circular hydraulic jump, Rj(6,P), (with reference to the stagnation point) due to an oblique jet impact can be estimated by equation 8.3. 

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