Fractal Characteristics of Microstructures on a Superhydrophobic Silicone Rubber Surface Induced by a Nanosecond Laser

Lie, 陈列 Chen; Guanqi, 文关棋 Wen; Fei, 郭飞 Guo; Tao, 胡涛 Hu; Liu, Dun

doi:10.3788/cjl202148.0602201

Cited by 3 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The change in the model results in a change in the wetting state of the material surface. [26][27][28][29] Both the Wenzel model and the Cassie model consider that the increase in the surface roughness can enhance the hydrophobic performance, however, the two models express different mechanisms of action. [30] Due to the nonuniformity of the microtextured surface, the wetted composite state may appear when the droplets are in contact with the surface.…”

Section: The Influence Mechanism Of Niti Sma Surface Wettabilitymentioning

confidence: 99%

Femtosecond Laser‐Induced Hydrophobic Surface of NiTi Shape Memory Alloy and its Blood Compatibility

Zhou

Liu

Chen

et al. 2023

Physica Status Solidi (a)

View full text Add to dashboard Cite

The study of nickel–titanium shape memory alloy (NiTi SMA) surface wettability is important to improve the blood compatibility of medical implant materials. Herein, a femtosecond laser with a wavelength of 1030 nm is used to process the hydrophobic surface of NiTi SMA. A scanning electron microscope, an X‐ray photoelectron spectrometer, a surface profiler, and a contact angle meter are used to measure the microstructure, the chemical composition, the surface roughness, and the surface contact angle of NiTi SMA. The influence of the laser fluence on the NiTi SMA surface wettability is analyzed using the Wenzel–Cassie composite model. The results show that as the laser fluence increases, the surface roughness gradually increases and then fluctuates. Moreover, a rapid increase followed by a gradual rise is observed in the surface contact angle. The blood compatibility of NiTi SMA surface increases with the increase in the surface contact angle. Specifically, the superhydrophobic surface with high contact angle and low rolling angle can significantly improve hemolysis and coagulation while reducing platelet adhesion and deformation. The study of the superhydrophobic microstructure of NiTi SMA surface will provide a new approach for improving the blood compatibility of medical implant materials.

show abstract

Section: The Influence Mechanism Of Niti Sma Surface Wettabilitymentioning

confidence: 99%