Fabrication of super-hydrophobic stainless steel needles and evaluation of their drag reduction properties

Micro & nano letters

article

Yongfeng Wang¹  Dandan Feng¹  Lei Wang¹ 

[1] Pediatric Clinic, First Hospital of Jilin University

关键词: scanning electron microscopy;    contact angle;    antibacterial activity;    adhesion;    crystal microstructure;    surface chemistry;    hydrophobicity;    surface energy;    surface roughness;    needles;    etching;    drag reduction;    stainless steel;    ink jet printing;    surface morphology;    wetting;    drag reduction properties;    surface roughness;    surface fluorination;    surface morphology;    bionic needle;    superhydrophobicity;    superhydrophobic property;    superhydrophobic stainless steel needles;    water contact angle;    ultrasonic etching;    resistance properties;    adhesion properties;    microstructures;    surface chemistry;   

DOI  :  10.1049/mnl.2018.5539

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Naturally, some living things have non-wettable super-hydrophobic surfaces that depend on surface roughness and surface chemistry. Mimicking such super-hydrophobic surfaces has applications for pain reduction and improving the functionality of needles used in health care. This study prepared a stainless steel needle with a super-hydrophobic surface using ultrasonic etching for microstructure fabrication and surface fluorination. The as-prepared stainless steel needle was super-hydrophobic, as evidenced by a water contact angle of 151.3°. Investigations into the effect of ultrasonic etch time on wettability indicated that microstructures on the surface of the stainless steel needle were important for developing super-hydrophobicity. Resistance properties of the as-prepared stainless steel needle were also governed by surface morphology. Super-hydrophobic stainless steel needles have self-cleaning and low adhesion properties and a drag reduction effect that may reduce pain during a puncture process. Simultaneously, the bionic needle with super-hydrophobic property has more applications in biological antibacterial, and reducing retention of expensive reagents. Furthermore, this method can also be applied to micropipette tips, and inkjet or bio-printer heads, which will make breakthroughs in small droplets manipulation, biometric, and inkjet printing equipment.

【 授权许可】

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