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Method for preparing super-hydrophobic surface with micro-nano needle protrusions through microwaves

A super-hydrophobic surface and micro-nano technology, applied in the field of super-hydrophobic, can solve the problems of limited application, difficulty in direct metal deposition, high cost, etc., achieve good reusability and avoid cumbersome operation methods

Inactive Publication Date: 2020-06-12
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The preparation methods of biomimetic superhydrophobic materials in the prior art include: hot pressing method, soft photolithography method, self-assembly method, self-mask dry etching method, and electrodeposition method. The existing preparation methods require special processing equipment And complex process, high cost, poor reliability and other disadvantages
Moreover, since the micro-nano structure on the surface of natural biomaterials is very small, it is very difficult to directly deposit metal on the surface, thus limiting the application of bionic micro / nano-structured surfaces with excellent functions.

Method used

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  • Method for preparing super-hydrophobic surface with micro-nano needle protrusions through microwaves
  • Method for preparing super-hydrophobic surface with micro-nano needle protrusions through microwaves
  • Method for preparing super-hydrophobic surface with micro-nano needle protrusions through microwaves

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Experimental program
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Effect test

Embodiment 1

[0031] Step 1: Rinse the cicada wings with deionized water for 20 minutes, then ultrasonically clean them with acetone for 20 minutes, and finally, ultrasonically clean them with deionized water for 10 minutes to remove residual acetone, and then dry them in a vacuum oven at 40°C.

[0032] Step 2, the cicada wings after step 1 cleaning and drying are first at 25 DEG C in the sensitizing solution (the composition of the sensitizing solution is 10g / L SnCl 2 ·H 2 O, 40ml / L HCl, 1g / L C 12 h 25 SO 4 Soak in Na) for 10min, then at 25°C in the activation solution (the composition of the activation solution is 1g / L PdCl 2 ·H 2 (0, 10ml / L HCl) for 5min. During the sensitization process, sodium dodecylsulfonate (C 12 h 25 SO 4 Na) as a surfactant to improve hydrogenation performance. Then, the cicada wings are naturally dried in the air to obtain the pretreated cicada wings.

[0033] Step 3, adopt chemical plating to fix the natural cicada wing after step 2 pretreatment on the...

Embodiment 2

[0037] Step 1, step 2 and step 3 are the same as embodiment 1.

[0038] Step 4, the nickel replica prepared in step 3 is used as a template, and the surface of the template is filled with ultrafine metal powder (zinc particle size is 300 mesh) after ball milling and compacted. Under the condition of microwave heating, the template filled with metal powder is heated to a temperature of 1200°C, kept for 1h, the microwave frequency is 10.5GHz, and the output power of the microwave source is 2kW. After cooling, the nickel template is removed to obtain a zinc metal surface with micro-nano needle protrusions. .

[0039] The average diameter of the micro-nano needle-convex structure on the metal replica prepared by the above steps is about 152 nm, and the average pitch is about 220 nm. The water contact angle of the metal replica surface in the wavelength range of 400-1000nm is 158°±2°, and the reflectance is about 4%.

Embodiment 3

[0041] Step 1 and step 2, with embodiment 1.

[0042] Step 3, adopt chemical plating to fix the natural cicada wing after step 2 pretreatment on the support glass, then immerse in chemical nickel plating solution (the composition of chemical nickel plating solution is 30g / L NiSO 4 ·6H 2 O, 30g / L NaH 2 PO 2 ·H 2 O, 20g / LNa 3 C 6 h 5 o 7 2H 2 (0), adjust the pH value of the solution to 8.5 with ammonia water, and stir magnetically at 40°C and 150r / min. A conductive nickel layer is deposited on the surface of the natural cicada wing by the above chemical plating. Subsequently, electroplating was carried out at 50°C with the conductive nickel-covered flap as the cathode and the Ni-S plate as the anode (the composition of the electroplating solution was 300g / L Ni(SO 3 NH 2 ) 2 4H 2 O, 15g / L NiCl 2 ·6H 2 O, 20g / L H 3 BO 3 ), the constant current density is 3A / dm 2 . In order to ensure the homogeneity of the electrolyte solution, magnetic stirring at a rotational s...

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Abstract

The invention belongs to the super-hydrophobic technical field, and particularly discloses a method for preparing a super-hydrophobic surface with micro-nano needle protrusions through microwaves. Thecicadas wing face is firstly cleaned up in advance, the surface is chemically plated with an electric conduction nickel layer, then the cicadas wing face is plated with a nickel deposition layer withthe thickness ranging from 200 micrometers to 500 micrometers through an electrochemical method, the cicadas wing is stripped to obtain a nickel template with micro-nano concave pits, the nickel template is placed in a forming mold to be filled with superfine metal powder, the metal powder is sintered through microwave heating, and the metal surface of the micro-nano needle protrusions is prepared. The cicadas wing is adopted as the original template through the electrochemical method, a nickel duplicate with conic nano holes is prepared. Then, microwave sintering forming is adopted, the nickel duplicate is adopted as the template, the conic nano holes are transferred to the meta surface, ordered and dense nano columns are formed, the average diameter ranges from 120 nm to 165 nm, and theaverage pitch ranges from 155 nm to 220 nm. Meanwhile, the manufactured nickel duplicate can be used repeatedly.

Description

technical field [0001] The invention belongs to the field of superhydrophobic technology, in particular to a method for preparing a micro-nano needle-convex superhydrophobic surface by using microwaves. Background technique [0002] The hydrophobicity of natural biomaterials is a natural phenomenon. In nature, many organisms have various excellent surface superhydrophobic characteristics, which is because there are almost perfect micro / nano structures on their surfaces. Artificial micro-nano structures are copied to these structures. With the development of science and technology, the preparation of biomimetic superhydrophobic materials is gradually becoming a cutting-edge science. [0003] The preparation methods of biomimetic superhydrophobic materials in the prior art include: hot pressing method, soft photolithography method, self-assembly method, self-mask dry etching method, and electrodeposition method. The existing preparation methods require special processing equip...

Claims

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Application Information

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IPC IPC(8): C23C18/32C23C18/16C23C18/20C23C28/02B22F5/00B22F3/105
CPCB22F3/105B22F5/00B22F2003/1054C23C18/1653C23C18/1657C23C18/2086C23C18/32C23C28/023
Inventor 许敬弓晓晶
Owner CHANGZHOU UNIV
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