A preparation method of petal-like superhydrophobic high-adhesion surface

A super-hydrophobic and high-adhesion technology, which is applied to the surface coating liquid device, special surface, pretreatment surface, etc., can solve the problem of insufficient quantitative research on surface microstructure, chemical composition, geometric morphology and surface wettability. Unable to optimize the technical parameters of the surface microstructure, unable to guide the design of the superhydrophobic surface, etc., to achieve good application prospects, good mechanical stability, and strong acid and alkali corrosion resistance

Active Publication Date: 2016-04-13
HARBIN INST OF TECH
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  • Abstract
  • Description
  • 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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  • A preparation method of petal-like superhydrophobic high-adhesion surface
  • A preparation method of petal-like superhydrophobic high-adhesion surface
  • A preparation method of petal-like superhydrophobic high-adhesion surface

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specific Embodiment approach 1

[0033] Embodiment 1: This embodiment prepares the imitation petal superhydrophobic surface according to the following steps:

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

[0035] Electrodeposition of porous Ni thin films by hydrogen bubble template method is based on platinum sheets (1 cm 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, immersion in absolute ethanol, acetone cleaning, low temperature blast drying, and sticking tape on the back of the stainless steel. The composition of the bath is 0.02-0.4mol·L -1 NiCl 2 , 0.5-4mol·L -1 NH 4 Cl and mass fraction were 2% acetic acid, pH was controlled in the range of 4.0±0.5, and the current density range of electrodeposition was 1.0-6.0A·cm -2 , the deposition time is 10-40s. The structure and mo...

specific Embodiment approach 2

[0041] Specific embodiment 2: This embodiment prepares the imitation petal superhydrophobic surface according to the following steps:

[0042] Step 1. Preparation of Porous Ni Thin Films by Hydrogen Bubble Template Method

[0043] Electrodeposition of porous Ni thin films by hydrogen bubble template method is based on platinum sheets (1 cm 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, immersion in absolute ethanol, acetone cleaning, low temperature blast drying, and sticking tape on the back of the stainless steel. The composition of the bath is 0.2mol·L -1 NiCl 2 , 2mol·L -1 NH 4 Cl and mass fraction were 2% acetic acid, pH was controlled in the range of 4.0±0.5, and the current density of electrodeposition was 3A·cm -2 , the deposition time is 30s. The deposited film sheet should be rinsed with distil...

specific Embodiment approach 3

[0050] Embodiment 3: This embodiment prepares the imitation petal superhydrophobic surface according to the following steps:

[0051] Step 1. Preparation of Porous Ni Thin Films by Hydrogen Bubble Template Method

[0052] Electrodeposition of porous Ni thin films by hydrogen bubble template method is based on platinum sheets (1 cm 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, immersion in absolute ethanol, acetone cleaning, low temperature blast drying, and sticking tape on the back of the stainless steel. The composition of the bath is 0.2mol·L -1 NiCl 2 , 2mol·L -1 NH 4 Cl and mass fraction were 2% acetic acid, pH was controlled in the range of 4.0±0.5, and the current density of electrodeposition was 3A·cm -2 , the deposition time is 30s. The deposited film sheet should be rinsed with distilled water...

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Abstract

The invention discloses a method for manufacturing a petal-imitating super-hydrophobic high-adhesion surface. The method includes the following steps that firstly, a hydrogen bubble template method is used for electroplating a layer of porous metal film on the surface of a metal sheet; secondly, the manufactured porous metal film is placed in an electric heating furnace to be oxidized, and a porous metal oxide template is obtained; thirdly, a high polymer curing system is mixed according to a proportion, normal hexane is added into the high polymer curing system, the mixture is poured into the porous metal oxide template, vacuum pumping is performed, curing is performed, the template is removed with a mechanical separation method after curing, and the petal-imitating super-hydrophobic high-adhesion surface is obtained. The method is simple, convenient to carry out, friendly to the environment, free of large instruments, low in cost and capable of being used for manufacturing petal-imitating micro-morphology surfaces, and experiment parameters are controllable. A micro-protrusion structure has the super-hydrophobic performance, the high-adhesion capacity, the self-cleaning capacity, the good mechanical stability, the strong acid-base corrosion resisting capacity and the good application prospect, and industrialization is hopefully achieved.

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- and nano-protrusions on the surface of petals, the research on superhydrophobic and high adhesion surfaces has attracted much attention. Highly adhesive superhydrophobic surfaces have important applications for efficient utilization of valuable reagents and solvents, drug discovery, DNA analysis, and synthesis of molecules or particles. like Figure 1-3 The macroscopic and microscopic structures of the rose petals are shown, and it can be found that the microscopic petals are composed of many micro-protrusions. There are nanostructures on the surface of a single micro-protrusion, and the distance between the protrusions is large. [0003] Existing studies have shown that there are two main factors affecting the wettability of solid surfaces: one is the surface free energy, and the other is the surface roughness....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D5/08B05D3/00C25D1/08
Inventor 刘宇艳张恩爽成中军吕通谭惠丰
Owner HARBIN INST OF TECH
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