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Preparation method of isotropic and anisotropic switchable super-hydrophobic surface

A super-hydrophobic surface, anisotropic 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 achieve improved reusability Sexuality, low price, widely used effect

Active Publication Date: 2016-11-09
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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  • Preparation method of isotropic and anisotropic switchable super-hydrophobic surface
  • Preparation method of isotropic and anisotropic switchable super-hydrophobic surface
  • Preparation method of isotropic and anisotropic switchable super-hydrophobic surface

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specific Embodiment approach 1

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

[0040] Step 1. Preparation of shape-memory epoxy resin microarray by template method

[0041] Preparation of PDMS (Dow Corning 184) intermediate template: Mix the PDMS precursor and curing agent according to the ratio of 10:1, pour it on the silicon template and cure it at 65-100°C for 2-5 hours, and demould the prepared PDMS intermediate template for later use.

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

[0043] Since the surfa...

specific Embodiment approach 2

[0050] Specific implementation mode 2: In this implementation mode, an isotropic and anisotropic switchable superhydrophobic surface is prepared according to the following steps:

[0051] Step 1. Preparation of shape-memory epoxy resin microarray by template method

[0052] Preparation of PDMS (Dow Corning 184) intermediate template: Mix the PDMS precursor and curing agent according to the ratio of 10:1 and pour it on the silicon template for 65 to cure for 5 hours. The PDMS intermediate template prepared by demoulding is ready for use.

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

[0054] Step 2. Temporary shape shaping of th...

specific Embodiment approach 3

[0059] Specific embodiment three: In this embodiment, an isotropic and anisotropic switchable superhydrophobic surface is prepared according to the following steps:

[0060] Step 1. Preparation of shape-memory epoxy resin microarray by template method

[0061] Preparation of PDMS (Dow Corning 184) intermediate template: Mix the PDMS precursor and curing agent according to the ratio of 10:1 and pour it on the silicon template for 65 to cure for 5 hours. The PDMS intermediate template prepared by demoulding is ready for use.

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

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

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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 super-hydrophobic surface, in particular to a preparation method of a super-hydrophobic surface which can be switched between isotropy and anisotropy. Background technique [0002] With the continuous development of bionics, researchers have found that imitating natural organisms to prepare artificial biomimetic surfaces is an effective method for preparing special functional surfaces. In nature, in addition to the well-known cleaning effect of lotus leaves, which are 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 hotspot. Rice leaves exhibit anisotropic wetting behavior due to the hierarchical structure of ordered micro- and nano-scale arrangements on the surface...

Claims

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Application Information

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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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