Self-cleaning superhydrophobic films by supersonic-spraying polytetrafluoroethylene-titania nanoparticles

被引：46

作者：

Kim, Do-Yeon ^{[1
]}

Lee, Jong-Gun ^{[1
]}

Joshi, Bhavana N. ^{[1
]}

Latthe, Sanjay S. ^{[2
]}

Al-Deyab, Salem S. ^{[3
]}

Yoon, Sam S. ^{[1
]}

机构：

[1] Korea Univ, Sch Mech Engn, Seoul 136713, South Korea

[2] Tokyo Univ Sci, Res Inst Sci & Technol, Photocatalysis Int Res Ctr, Noda, Chiba 2788510, Japan

[3] King Saud Univ, Dept Chem, Coll Sci, Petrochem Res Chair, Riyadh 11451, Saudi Arabia

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2015年 / 3卷 / 07期

基金：

新加坡国家研究基金会;

关键词：

THIN-FILMS; SURFACES; TIO2; WETTABILITY; FABRICATION; CONVERSION; TRANSPARENT; DEPOSITION; COATINGS; IMPACT;

D O I：

10.1039/c4ta06863g

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Spherical water drops show little or no adhesion to superhydrophobic surfaces due to the strong water repellence. Polytetrafluoroethylene (PTFE)-titania (TiO2) nanocomposite films were fabricated using a scalable, rapid and cost-effective technique: supersonic spray coating at room temperature. The wettability of the supersonic spray-coated nanocomposite films can be tuned to the Cassie-Baxter or Wenzel wetting states by simply varying the relative content of titania. This wettability tuning can also be used to adjust the surface morphology of the films, resulting in either a rough compact structure or a porous morphology. The static water contact angle and roll-off angles were measured for the nanocomposite films as a function of the titania content. Furthermore, water drop rebounding and water jet impact tests were performed on the nanocomposite films and their self-cleaning properties were investigated.

引用

页码：3975 / 3983

页数：9

共 48 条

[1] Impact, recoil and splashing of molten metal droplets [J].