Abstract
Superhydrophobic and oleophobic surfaces have attracted increasing attention because of their self-cleaning properties. A composite coating composed of anodized titanium and sol-gel (TiAO/SG) was developed and has good superhydrophobic and oleophobic property. The anodized titanium coating was prepared on the titanium substrate and then a sol-gel layer was coated on the surface of the anodized titanium layer to obtain a composite coating with superhydrophobic and oleophobic properties. The adhesion weight of glycerol on the surface of the superhydrophobic titanium wire decreased to 4.8% of that of untreated titanium wire, which showed that the material had good oleophobic property. This new composite coating could achieve self-healing superhydrophobicity by releasing loaded perfluorodenytriethoxysilane to the surface of the coating. Given its superhydrophobicity, self-healing and wear resistance, the TiAO/SG coating was expected to achieve healable self-cleaning protection in titanium devices.
Highlights
In the past few decades, the superhydrophobic and oleophobic surfaces have attracted sustained attention due to its self-cleaning properties (Liu et al, 2016; Qu et al, 2016; Wen and Guo, 2016; Wang et al, 2017; Li and Guo, 2019; Liu et al, 2019; Shen et al, 2019; Xing et al, 2019; Guo et al, 2020; Naderizadeh et al, 2020)
Fluorinated solgel was prepared by co-hydrolysis of silane and flurosilane, and the sol-gel was coated on the surface of titanium to form an anodized titanium and sol-gel composite coating
The adhesion weight of glycerol on the surface of the superhydrophobic titanium wire decreased to 4.8% of that of untreated titanium wire
Summary
In the past few decades, the superhydrophobic and oleophobic surfaces have attracted sustained attention due to its self-cleaning properties (Liu et al, 2016; Qu et al, 2016; Wen and Guo, 2016; Wang et al, 2017; Li and Guo, 2019; Liu et al, 2019; Shen et al, 2019; Xing et al, 2019; Guo et al, 2020; Naderizadeh et al, 2020). The low surface energy materials prepared by fluorination are damaged and loses superhydrophobic and oleophobic performance. An anodized titanium and sol-gel composite coating with simple preparation, superhydrophobicity, oleophobicity and mechanical stability is developed. Fluorinated solgel was prepared by co-hydrolysis of silane and flurosilane, and the sol-gel was coated on the surface of titanium to form an anodized titanium and sol-gel composite coating. Compared with the untreated titanium surface, the composite coating had larger contact angles with water, hexadecane, propylene glycol, and glycerol. The anodized titanium coating was dipped in the sol-gel treatment solution, dried at room temperature, and heated in an oven at 180°C for 3 h.
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