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Preparation method of lotus-like super-hydrophobic self-cleaning surface

A super-hydrophobic, self-cleaning technology, applied in the field of silicone rubber microarray preparation, can solve the problem of insufficient quantitative research on surface microstructure chemical composition, geometry and surface wettability, inability to optimize surface microstructure technical parameters, and inability to guide Super-hydrophobic surface design and other issues have achieved good application prospects, good mechanical stability, and strong acid and alkali corrosion resistance.

Active Publication Date: 2014-06-25
黑龙江德明科技开发有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the practical application of superhydrophobic surfaces is far from industrialization, and many problems need to be solved urgently
On the one hand, simple, economical and environmentally friendly preparation methods have yet to be developed, and the stability and mechanical strength of the prepared surface also need to be improved; on the other hand, compared with many superhydrophobic surface preparation schemes, from the perspective of theoretical analysis However, the quantitative research on the chemical composition, geometric morphology and surface wettability of the surface microstructure is not perfect, which leads to the inability to optimize the technical parameters of the surface microstructure, and cannot guide the design of the superhydrophobic surface

Method used

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  • Preparation method of lotus-like super-hydrophobic self-cleaning surface
  • Preparation method of lotus-like super-hydrophobic self-cleaning surface
  • Preparation method of lotus-like super-hydrophobic self-cleaning surface

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specific Embodiment approach 1

[0033] Specific implementation mode 1: This implementation mode prepares the imitation lotus leaf superhydrophobic surface according to the following steps:

[0034] The first step, hydrogen bubble template method to prepare porous Ni film ( Figure 4 )

[0035] Platinum sheet (1cm 2 ) as the anode, and the counter electrode is made of 304 stainless steel (1cm 2 ) is the cathode. The pretreatment of stainless steel in the experiment includes polishing, degreasing, acid etching, water washing, ethanol immersion, acetone cleaning, low temperature blast drying, and sticking tape on the back of the stainless steel. The composition of the plating solution is 0.02-0.4mol L -1 NiCl 2 , 0.5-4mol·L -1 NH 4 Cl and 2wt.% acetic acid, the pH is controlled within the range of 4.0±0.5, and the current density range of electrodeposition is 1.0-6.0A·cm -2 , the deposition time is 10-40s. The structure and morphology of the porous Ni film were constructed by adjusting the deposition p...

specific Embodiment approach 2

[0041] Specific implementation mode two: this implementation mode prepares imitation lotus leaf superhydrophobic surface according to the following steps:

[0042] Step 1. Preparation of porous Ni film by hydrogen bubble template method

[0043] Electrodeposition of porous Ni thin films by hydrogen bubble template method is based on platinum sheet (1cm 2 ) as the anode, and the counter electrode is made of 304 stainless steel (1cm 2 ) is the cathode. The pretreatment of stainless steel in the experiment includes polishing, degreasing, acid etching, water washing, ethanol immersion, acetone cleaning, low temperature blast drying, and sticking tape on the back of the stainless steel. The composition of the plating solution is 0.2mol L -1 NiCl 2 , 2mol L -1 NH 4 Cl and 2wt.% acetic acid, the pH is controlled within the range of 4.0±0.5, and the current density of electrodeposition is 3A cm -2 , the deposition time is 30s. The deposited thin film should be immediately rins...

specific Embodiment approach 3

[0050] Specific embodiment three: In this embodiment, the imitation lotus leaf superhydrophobic surface is prepared according to the following steps:

[0051] Step 1. Preparation of porous Ni film by hydrogen bubble template method

[0052] Electrodeposition of porous Ni thin films by hydrogen bubble template method is based on platinum sheet (1cm 2 ) as the anode, and the counter electrode is made of 304 stainless steel (1cm 2 ) is the cathode. The pretreatment of stainless steel in the experiment includes polishing, degreasing, acid etching, water washing, ethanol immersion, acetone cleaning, low temperature blast drying, and sticking tape on the back of the stainless steel. The composition of the plating solution is 0.2mol L -1 NiCl 2 , 2mol L -1 NH 4 Cl and 0.001wt.% OP (polyoxyethylene octylphenol ether), the pH is controlled within the range of 4.0 ± 0.5, and the current density of electrodeposition is 3A cm -2 , the deposition time is 30s. The deposited film sho...

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Abstract

The invention discloses a preparation method of a lotus-like super-hydrophobic self-cleaning surface. The method comprises the following steps: (1) electroplating a layer of porous metal film on the surface of a metal sheet by adopting a hydrogen bubble template method; (2) putting the prepared porous metal film into an electric heating furnace for oxidizing to obtain a porous metal oxide template; (3) proportionally mixing a high polymer curing system, adding normal hexane, pouring into the porous metal oxide template for curing, and removing the template after curing to obtain the lotus-like super-hydrophobic self-cleaning surface. The method has the advantages of easiness, convenience, environmental friendliness, no need of large-sized instruments, controllability of experimental parameters and low cost, and can be used for manufacturing a lotus-like micromorphology surface. A micro-protruding structure has the characteristics of super hydrophobicity, self-cleaning capability, high mechanical stability, high acid-base resistance and good application prospect, and can be industrialized.

Description

technical field [0001] The invention relates to a preparation method of a silicon rubber microarray. Background technique [0002] Since the discovery of the micro-nano protrusions on the surface of lotus leaves, the research on superhydrophobic self-cleaning surfaces has attracted people's attention. The so-called super-hydrophobic surface generally refers to the surface whose contact angle with water is greater than 150°, and it has extremely broad application prospects in industrial and agricultural production and people's daily life. [0003] Recent studies have shown that the nanostructure of solid surfaces plays an important role in superhydrophobicity. Figure 1-3 The microstructure of the lotus leaf shown is characterized by micron-scale protrusions, and nanostructures are distributed on a single protrusion. The construction of surface nanostructures can produce a large contact angle. Existing studies have shown that there are two main factors affecting the wettabil...

Claims

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Application Information

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IPC IPC(8): C08J5/00C08L83/04C08L25/06C08L75/04C08L27/18
Inventor 刘宇艳张恩爽成中军吕通谭惠丰
Owner 黑龙江德明科技开发有限公司
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