Abstract
Superhydrophobic surface was prepared by sol-gel method on aluminum substrate via immersing the clean pure aluminum substrate into the solution of zinc nitrate hexahydrate (Zn(NO 3 ) 2 ·6H 2 O) and hexamethylenetetraamine (C 6 H 12 N 4 ) at different molar ratios and unchanged 0.04 mol/L total concentration, then heated at 95 °C in water bath for 1.5 h, subsequently modified with 18 alkanethiols or stearic acid. When the molar ratios of Zn(NO 3 ) 2 ·6H 2 O and C 6 H 12 N 4 were changed from 10:1 to 1:1 the contact angle was higher than 150°. The best prepared surface had a high water contact angle of about 154.8°, as well as low angle hysteresis of about 3°. The surface of prepared films using Zn(NO 3 ) 2 ·6H 2 O and C 6 H 12 N 4 composed of ZnO and Zn-Al LDH, and Al. SEM images of the film showed that the resulting surface exhibits different flower-shaped wurtzite zinc oxide microstructure and porous Zn-Al LDH. The special flowerlike and porous architecture, along with the low surface energy leads to the surface superhydrophobicity.
| Original language | English |
|---|---|
| Pages (from-to) | 6072-6075 |
| Number of pages | 4 |
| Journal | Applied Surface Science |
| Volume | 256 |
| Issue number | 20 |
| DOIs | |
| Publication status | Published - 1 Aug 2010 |
Keywords
- Sol-gel
- Superhydrophobic
- Water contact angle