Fabrication of superhydrophilic surfaces for long time preservation on 316 l stainless steel by ultraviolet laser etching

Due to the good biocompatibility, 316 l stainless steel is widely used in the manufacture of medical instruments and human implants. The super hydrophilic 316 l steel surface is used for reducing friction and adhesion. By choosing appropriate laser process parameters 316 l steel surfaces with super-hydrophilic were obtained. The effects of laser process parameters including repeat frequency, pulse width, scanning speed, and the number of scanning were investigated to find the relationship between surface microstructure and wetting ability. To investigate the super-hydrophilic maintenance time on the textured surface, the textured surfaces were preserved in ambident air, distilled water, and absolute ethanol. The results showed that by choosing appropriate laser process parameters surface with super-hydrophilicity can be maintained for 30 d.

Automated summary

Due to its good biocompatibility, 316L stainless steel is widely used in the manufacture of medical instruments and human implants. In this study, super-hydrophilic 316L steel surfaces were achieved by selecting appropriate laser process parameters. The effects of laser process parameters on surface microstructure and wetting ability were investigated, and the relationship between them was established. Additionally, the maintenance time of super-hydrophilicity on textured surfaces was studied.