研究目的
To investigate the drag reduction effect of ultraviolet laser-fabricated superhydrophobic surfaces on stainless steel, specifically by adjusting the line spacing of U-groove patterns and evaluating performance using a self-built device.
研究成果
The ultraviolet laser texturing and modifier coating effectively create superhydrophobic surfaces on stainless steel, with optimal drag reduction of 29.7% achieved at an 80 μm line spacing. This is attributed to the hierarchical micro-nano structures and air-bubble layer reducing frictional resistance. The method shows promise for energy savings in marine and pipeline applications, with recommendations for future work on scalability and deeper mechanistic studies.
研究不足
The study is limited to laboratory-scale experiments with a self-built device; scalability to real marine applications may require further validation. The exception in contact angle variation at certain spacings is noted but not deeply investigated. The air-bubble layer stability is assumed for depths less than 8 m, but practical conditions might differ.
1：Experimental Design and Method Selection:
The study uses ultraviolet laser texturing to create crossing U-groove patterns on stainless steel surfaces, followed by chemical modifier coating to achieve superhydrophobicity. A self-built gravity-driven sliding device is designed to simulate boat movement and test drag reduction.
2：Sample Selection and Data Sources:
Polished ANSI 304 stainless steel sheets (40 mm × 40 mm × 1 mm) are used as substrates. Samples are prepared with varying laser scanning spacings from 50 to 230 μm.
3：List of Experimental Equipment and Materials:
Ultraviolet laser (wavelength: 355 nm, pulse width: 20 ns, average power: 2 W, brand: Aptowave Co. Ltd), anti-fingerprint oil (Heptadecafluoro-1,1,2,2-tetradecyltrimethoxysilane, brand: Shenzhen Chemical Co. Ltd), contact angle instrument (OCA15EC, Dataphysics), laser scanning confocal microscopy (OSL 4100, Olympus), scanning electron microscope (SEM, QUANTA 200F, FEI), self-built device with plexiglass pipe, sliding guide, and specimen fixture.
4：Experimental Procedures and Operational Workflow:
Laser texturing with specified parameters (scanning speed: 100 mm/s, frequency: 55 kHz, iterations: 8), spin-coating of modifier at 2000 rev/min, heating at 170°C for 30 min. Wetting characteristics (contact angle and sliding angle) are measured. Drag reduction is tested by timing specimen movement in the device.
5：Data Analysis Methods:
Statistical analysis of contact angle, sliding angle, and time consumption data to evaluate drag reduction performance, with results presented in graphs and histograms.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
