Patent ID: 9587304
Date: 2017-03-07
CPC Classifications: B05D,C09D,C23C,Y10T

Claim:
1. A method of manufacturing a hydrophobic surface having an apparent contact angle of at least 150°, the method comprising: i) providing a base substrate and a polymeric material; ii) forming a layer of said polymeric material on said substrate, said layer having a bottom surface attached to said substrate base, and an upper surface, wherein the polymeric material in said layer is structured at two different size scales, the first scale ranging from about 0.1 to 2 μm, and the second scale between 0.5-50 μm; and iii) further structuring said polymeric material at a third size scale by forming indentations on said upper surface, wherein an average distance between adjacent indentations is from 20 to 200 μm, wherein the hydrophobic surface having the three size scales is arranged in pseudoperiodic areas of higher and lower mass density, measured along a line going through the polymeric material and oscillating in a fractal-like manner; thereby obtaining a hydrophobic surface having an apparent contact angle of at least 150°.