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A method for preparing isotropic and anisotropic switchable superhydrophobic surfaces

A super-hydrophobic surface, isotropic technology, applied in the process of producing decorative surface effects, manufacturing microstructure devices, decorative arts, etc., can solve the problem of less research on dynamic anisotropy, and improve reusability. Sexual, inexpensive, widely used effects

Active Publication Date: 2017-05-31
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the preparation of anisotropic wettable surfaces is mostly focused on the preparation of static anisotropy, and there are few studies on dynamic anisotropy

Method used

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  • A method for preparing isotropic and anisotropic switchable superhydrophobic surfaces
  • A method for preparing isotropic and anisotropic switchable superhydrophobic surfaces
  • A method for preparing isotropic and anisotropic switchable superhydrophobic surfaces

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specific Embodiment approach 1

[0039] Specific implementation one: as figure 1 As shown, this embodiment prepares isotropic and anisotropic switchable superhydrophobic surfaces according to the following steps:

[0040] Step 1. Use template method to prepare shape memory epoxy resin microarray

[0041] Preparation of PDMS (Dow Corning 184) intermediate template: The PDMS precursor and curing agent are mixed in a ratio of 10:1, poured on the silicon template and cured at 65-100°C for 2-5 hours, and the PDMS intermediate template prepared by demolding is ready for use.

[0042] Preparation of epoxy resin prepolymer: Mix bisphenol A glycidyl ether epoxy resin E-51, n-octylamine and m-xylylenediamine in a molar ratio of 4:2:1, pour it on the PDMS intermediate template, and pump Air to remove air bubbles, curing at 60 ° C for 2 hours and then curing at 120 ° C for 12 hours. The cured samples were demolded to obtain a shape memory epoxy resin microarray surface.

[0043] Since the surface of the silicon templa...

specific Embodiment approach 2

[0050] Embodiment 2: In this embodiment, the isotropic and anisotropic switchable superhydrophobic surfaces are prepared according to the following steps:

[0051] Step 1. Use template method to prepare shape memory epoxy resin microarray

[0052] Preparation of PDMS (Dow Corning 184) intermediate template: The PDMS precursor and curing agent were mixed in a ratio of 10:1, poured on the silicon template for 65 hours and cured for 5h, and the PDMS intermediate template prepared by demolding was ready for use.

[0053] Preparation of epoxy resin prepolymer: Mix bisphenol A glycidyl ether epoxy resin E-51, n-octylamine and m-xylylenediamine in a molar ratio of 4:2:1, pour it on the PDMS intermediate template, and pump Air to remove air bubbles, curing at 60 ° C for 2 hours and then curing at 120 ° C for 12 hours. The cured samples were demolded to obtain a shape memory microarray surface.

[0054] Step 2. Temporary shape shaping of the microarray surface using the microgrooved ...

specific Embodiment approach 3

[0059] Embodiment 3: This embodiment prepares an isotropic and anisotropic switchable superhydrophobic surface according to the following steps:

[0060] Step 1. Use template method to prepare shape memory epoxy resin microarray

[0061] Preparation of PDMS (Dow Corning 184) intermediate template: The PDMS precursor and curing agent were mixed in a ratio of 10:1, poured on the silicon template for 65 hours and cured for 5h, and the PDMS intermediate template prepared by demolding was ready for use.

[0062] Preparation of epoxy resin prepolymer: Mix bisphenol A glycidyl ether epoxy resin E-51, n-octylamine and m-xylylenediamine in a molar ratio of 4:2:1, pour it on the PDMS intermediate template, and pump Air to remove air bubbles, curing at 60 ° C for 2 hours and then curing at 120 ° C for 12 hours. The cured samples were demolded to obtain a shape memory microarray surface.

[0063] Step 2. Temporary shape shaping of the microarray surface using the microgrooved structure ...

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Abstract

The invention discloses a preparation method of an isotropic and anisotropic switchable super-hydrophobic surface. The preparation method comprises the following steps of: 1, preparing a shape memory epoxy resin micron array super-hydrophobic surface by using PDMS as an intermediate template; 2, designing silicon micro groove templates with different widths, and carrying out hot embossing on the micron array prepared in the step 1 so that a micron array with micro groove structures of different widths is prepared after cooling ; and 3, carrying out hot-trigger on the micron array with the micro groove structures to restore the initial micro array super-hydrophobic surface from the material. According to the preparation method disclosed by the invention, the anisotropic switchable super-hydrophobic surface prepared by combining a template method with an embossing method has a micro structure size of 10*10*10[mu] m and a spacing of 5 to 30[mu] m; and after micro grooves are embossed, a static anisotropic contact angle difference value of the surface can reach 2 to 5 degrees, and a rolling angle difference can reach 2 to 50 degrees.

Description

technical field [0001] The invention relates to a preparation method of a superhydrophobic surface, in particular to a preparation method of a superhydrophobic surface that can be switched between isotropic and anisotropic. Background technique [0002] With the continuous development of bionics, researchers have found that imitating natural organisms to prepare artificial bionic surfaces is an effective method to prepare special functional surfaces. In nature, in addition to the well-known cleaning effect of lotus leaves, which is widely inspired for the preparation of superhydrophobic surfaces, some special plant leaves, petals and bird feathers with obvious anisotropic wetting surfaces have also aroused strong interest of researchers. , the preparation of anisotropic surfaces is gradually becoming a new research focus. Rice leaves have anisotropic wetting behavior due to the hierarchical structure of micro- and nano-ordered arrangement on their surface. The micro-dendri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B81C1/00C09D163/00
CPCB81C1/00B81C1/00015B81C1/00349C09D163/00
Inventor 成中军张恩爽刘宇艳吕通王友善
Owner HARBIN INST OF TECH
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