Highly durable superhydrophobic surfaces based on a protective frame and crosslinked PDMS-candle soot coatings

被引:2
作者
Sun, Wenwen [1 ]
Lv, Kai [2 ]
Lou, Yisha [3 ]
Zeng, Dongdong [4 ]
Lin, Xiangde [4 ]
机构
[1] Shanghai Univ Med & Hlth Sci, Affiliated Zhoupu Hosp, Shanghai 201318, Peoples R China
[2] Shanghai Univ Tradit Chinese Med, Yueyang Hosp Integrated Chinese & Western Med, Dept Orthoped, Shanghai 200437, Peoples R China
[3] Shanghai Univ Med & Hlth Sci, Sch Med Technol, Shanghai 201318, Peoples R China
[4] Shanghai Univ Med & Hlth Sci, Sch Med Instrument, Shanghai 201318, Peoples R China
基金
中国国家自然科学基金;
关键词
superhydrophobic surfaces; high durability; stainless steel mesh; polydimethylsiloxane; candle soot;
D O I
10.1088/2053-1591/ac8c1f
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Superhydrophobic surfaces can be applied to environmental, energy, and healthcare fields. However, the weak durability issue has significantly limited the practical industrial applications. To overcome the readily destroyed interfacial structures and chemical compositions, the superhydrophobic surfaces with high mechanical and chemical durability have been created on a stainless steel mesh (SSM) as a protective frame based on tightly crosslinked polydimethylsiloxane (PDMS)-candle soot (CS) composite coatings through simple mechanical transfer and candle burning processes, which abbreviated to SSM/PDMS-CS and showed a water contact angle (WCA) of 159.4 degrees +/- 1.6 degrees and a sliding angle (SA) of 2.3 degrees +/- 0.5 degrees. Harsh abrasion examinations based on sandpaper and fiber paper have been conducted by applying 100 g weight and 200 cm sliding distance. And the obtained WCAs and SAs were 155 degrees +/- 3.7 degrees, 155.7 degrees +/- 2 degrees and 3.7 degrees +/- 0.5 degrees, 3.5 degrees +/- 0.3 degrees. Scanning electron microscope showed scratches on the surface, but the superhydrophobic property has been well maintained. After 40 kHz ultrasonication treatment for 30 min, WCA and SA were 152 degrees +/- 0.9 degrees and 4.1 degrees +/- 0.8 degrees. Finally, SSM/PDMS-CS surfaces exhibit good chemical resistance to corrosive solutions even after pH 2, pH 10, 1 M NaCl, and toluene treatments for 15 days.
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页数:9
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