High-efficient and scalable fabrication of robust superhydrophobic microarrays through maskless electrochemical machining

Liu, Zheming; Lian, Zhongxu; Yang, Jinda; Xu, Jinkai; Tian, Yanling; Yu, Huadong

doi:10.1016/j.colsurfa.2023.132700

Cited by 4 publications

(1 citation statement)

References 71 publications

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“…The study of the array structure has revealed its excellent strengthening and protection properties for superhydrophobic surfaces. , Micron-scale rough array structures are sufficient for rough-scale needs, while nanoscale rough structures can be achieved through methods such as spraying, spin-coating, and dip-coating for nanoparticle attachment. − The accuracy of 3D printing and laser processing equipment has been improving rapidly, while the cost has been decreasing. This development has made it possible to achieve array processing with micrometre-scale accuracy.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic Surfaces Prepared from Columnar Units by Convenient Electrodeposition with Excellent Mechanical Stability Impact and Corrosion Resistance

Sun,

Dai,

Guo

2024

Langmuir

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Regular array structures prepared by laser processing and three-dimensional printing have promising applications in building stable superhydrophobic structures. However, the size of the materials processed by these two methods is affected by the size of the processing equipment, which prevents the processing of large-size materials. In this paper, a columnar unit consisting of a spherical structure with similar mechanical stability to the array structure is designed and prepared for metal surface protection. A convenient electrodeposition method was used to deposit a layer of columnar micron-sized copper consisting of spheres on the surface of a 6061 aluminum alloy. Subsequently, modified ZrO 2 nanoparticles and polytetrafluoroethylene (PTFE) were sprayed on the surface to form a superhydrophobic surface with synergistic columnar units and ZrO 2 (CAZ). The structure was tested and found to have excellent mechanical stability, maintaining the superhydrophobic properties of the surface even after 200 abrasion cycles of 1000-grit sandpaper under a 500 g load. Moreover, the vertical deformation of the CAZ sample under normal pressure was increased by a factor of 4 compared to the original substrate. Importantly, in subsequent corrosion resistance tests, the CAZ samples showed a two-order-of-magnitude improvement in selfcorrosion current density and impedance modulus at low frequencies compared to the original substrate. This strategy is an effective method for preparing mechanically stable superhydrophobic structures that are low-cost and large enough to provide long-term protection for metal surfaces. It is particularly suitable for surface protection of instruments and automotive chassis armor.

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