阅读说明：本技术 一种获得阶梯层状结构的超疏水表面的方法 (Method for obtaining super-hydrophobic surface of stepped layered structure ) 是由 熊党生 佟威 周黄捷 时志兵 于 2019-11-15 设计创作，主要内容包括：本发明公开了一种获得阶梯层状结构的超疏水表面的方法,通过激光加工的孔阵列排列方式和纳米粒子的共沉积过程,获得超疏水表面；其中,调整孔阵列的深度提高超疏水表面的机械稳定性,调整孔阵列的间距和孔径大小提高超疏水表面的浸润性；调整纳米粒子的粒径和聚二甲基硅氧烷的添加量提高制得超疏水表面的浸润性。本发明的方法在制备过程中无任何氟化处理及氟化成分,该方法的生产成本较低,造成环境污染的可能性较小。制得的超疏水表面不仅具有大于150°的接触角,更为重要的是其滚动角为2°以下,而且该方法的可操作性较强,可广泛适用于多种平面基体。因此,所制得的超疏水表面在建筑、机械制造、航空航天以及航海等领域将具有广阔的应用前景。(The invention discloses a method for obtaining a super-hydrophobic surface with a stepped layered structure, which obtains the super-hydrophobic surface through a hole array arrangement mode of laser processing and a co-deposition process of nano particles; the depth of the hole array is adjusted to improve the mechanical stability of the super-hydrophobic surface, and the size of the space and the aperture of the hole array is adjusted to improve the wettability of the super-hydrophobic surface; the size of the nano particles and the addition amount of polydimethylsiloxane are adjusted to improve the wettability of the prepared super-hydrophobic surface. The method of the invention has no fluorination treatment and fluorination component in the preparation process, and the method has lower production cost and less possibility of causing environmental pollution. The prepared super-hydrophobic surface not only has a contact angle larger than 150 degrees, but also has a rolling angle below 2 degrees, and the method has strong operability and can be widely applied to various planar substrates. Therefore, the prepared super-hydrophobic surface has wide application prospect in the fields of building, mechanical manufacturing, aerospace, navigation and the like.)

1. A method for obtaining a super-hydrophobic surface with a stepped layered structure is characterized in that the super-hydrophobic surface is obtained through a hole array arrangement mode of laser processing and a co-deposition process of nano particles; the depth of the hole array is adjusted to improve the mechanical stability of the super-hydrophobic surface, and the size of the space and the aperture of the hole array is adjusted to improve the wettability of the super-hydrophobic surface; the size of the nano particles and the addition amount of polydimethylsiloxane are adjusted to improve the wettability of the prepared super-hydrophobic surface.

2. The method for obtaining a superhydrophobic surface of a stepped laminar structure according to claim 1, characterized in that it comprises the following steps:

obtaining a regularly arranged array by the cleaned and dried plane sample under laser etching; carrying out ultrasonic cleaning on the sample subjected to laser etching processing for several times, then placing the sample in a water mixed solution prepared from inorganic acid/hydrogen peroxide for chemical etching treatment for 3-10 min, cleaning the array sample subjected to etching treatment in ethanol and deionized water for several times, and carrying out super-hydrophobic nanoparticle codeposition after blow-drying; and then curing at 60 ℃ for 1-2 h, and curing at 80 ℃ for 2-5 h to obtain the super-hydrophobic surface with the stepped layered structure.

3. The method for obtaining the superhydrophobic surface of the stepped layered structure according to claim 2, wherein the parameters of the hole array after the laser etching treatment are hole pitch 0.01mm, hole diameter 0.5mm and hole depth 0.1 mm.

4. The method for obtaining the superhydrophobic surface of the stepped layered structure according to claim 2, wherein the aqueous mixed solution prepared from the inorganic acid/hydrogen peroxide comprises common inorganic acids of hydrochloric acid, sulfuric acid and nitric acid; the volume ratio of the acid to the hydrogen peroxide to the water is as follows: 1.5-3: 0.5-2.5: 10.

5. the method for obtaining the superhydrophobic surface of the stepped layered structure according to claim 2, wherein the chemical etching treatment time is 3-10 min, and the soaking temperature is 10-30 ℃.

6. The method for obtaining the superhydrophobic surface with the stepped layered structure according to claim 2, wherein the superhydrophobic nanoparticle codeposition process is a fluorine-free modification process, the added nanoparticles have a particle size of 200-350 nm, and the nanoparticles can be silicon dioxide, titanium dioxide or zinc oxide.

7. The method for obtaining the superhydrophobic surface of the stepped layered structure according to claim 6, wherein the modification liquid added in the modification process without fluorination is n-hexane solution of stearic acid with concentration of 1mol/L, wherein polydimethylsiloxane, nanoparticles are added; the mass ratio of stearic acid n-hexane to polydimethylsiloxane to the nano particles is 0.25-0.3: 1:2-5.

8. The method for obtaining the superhydrophobic surface with the stepped layered structure according to claim 6, wherein the stirring time of the modification process without fluorination is 20-40 min, the stirring speed is not lower than 2000rpm, and the deposition time is 3-10 min.