Transparent and durable SiO2‐containing superhydrophobic coatings on glass |
| |
| Authors: | Fang Li Miao Du Qiang Zheng |
| |
| Affiliation: | Department of Polymer Science and Engineering, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Zhejiang University, Hangzhou, China |
| |
| Abstract: | We fabricated novel superhydrophobic coatings based on SiO2 nanoparticles combined with NH2‐terminated silicone (SN2) or SN2‐modified polyurethane (SN2‐prePU) by alternately spin‐coating them onto glass slides. The final fabricated surface contained SN2/SiO2 or SN2‐prePU/SiO2 bilayers. The conditions of spin‐coating method were also explored. SN2‐prePU with different SN2/prePU molar ratios were synthesized to study the influence of SN2 ratio on the water contact angles of ultimate spin‐coated surfaces. The surface was found to be tunable from hydrophobic to superhydrophobic by choosing SN2‐prePU with different SN2/prePU molar ratios or SN2 content. Water droplets easily rolled off on these superhydrophobic surfaces. Surfaces coated with SN2/SiO2 bilayers showed better transparency, whereas surfaces coated with SN2‐prePU(2 : 1)/SiO2 bilayers exhibited better durability. Droplets of varied pH were prepared to test the anti‐wettability of the coatings. Results showed that the as‐coated surfaces had stable superhydrophobicity to droplets with pH values ranging from 1 to 14. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 41500. |
| |
| Keywords: | durable spin‐coating superhydrophobic coating transparent |
|
|
