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Super-hydrophobic functional material, preparation method and application of the same

A functional material and super-hydrophobic technology, which is applied in the direction of surface coating liquid devices, pre-treated surfaces, coatings, etc., can solve problems such as poor weather resistance and loss of function

Active Publication Date: 2015-04-01
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many organic materials are easy to decompose under direct sunlight, lose their original functions, and have poor weather resistance. Therefore, direct exposure of organic materials to the surface of the material should be avoided as much as possible.

Method used

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  • Super-hydrophobic functional material, preparation method and application of the same
  • Super-hydrophobic functional material, preparation method and application of the same
  • Super-hydrophobic functional material, preparation method and application of the same

Examples

Experimental program
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Effect test

preparation example Construction

[0044] The present invention proposes a preparation method of superhydrophobic functional material, comprising:

[0045] Step 1: Select the material that needs super-hydrophobic treatment as the substrate layer, and clean the surface of the substrate layer until it is clean;

[0046] Step 2: Apply silicone oil, referred to as PDMS layer, on the substrate material and allow it to cure;

[0047] Step 3: Configure different concentrations of nanoparticle suspensions as required, apply nanoparticle suspensions on the silicone oil layer, and form nanoparticle film layers of different thicknesses on the silicone oil layer after the solvent for dispersing the nanoparticles evaporates;

[0048] Step 4: The nanoparticle film layer is subjected to ultraviolet light treatment or heat treatment to obtain a layered superhydrophobic functional material.

[0049] Wherein, the substrate is selected from materials bonded with silicone oil.

[0050] Wherein, the substrate is selected from hard ...

specific Embodiment 1

[0077] First, clean the copper sheet. Use a mixture of ethanol, acetone and deionized water to sonicate for 10 minutes; then use deionized water to sonicate for 10 minutes. Remove the copper piece and dry it with nitrogen gas.

[0078] The volume ratio of PDMS to curing agent is 10:1, mixed thoroughly and evenly, then spin-coated on copper, and then heated to make PDMS quickly and fully cured.

[0079] Put 10g of titanium dioxide particles with a particle size of 20nm in 80mL of absolute ethanol to form a turbid solution, mix with stirring for about 1min, and then sonicate for 10min to disperse the particles evenly.

[0080] Take a small amount of titanium dioxide-ethanol turbid liquid droplets on the PDMS / substrate, roll the droplets with a glass rod to make them evenly distributed on the PDMS surface, and leave a solid particle titanium dioxide film layer after the ethanol evaporates. The whole system has a three-layer structure. "TiO 2 / PDMS / copper” structure.

[0081] ...

specific Embodiment 2

[0082] First, the silicon wafer substrate that needs to be prepared as super-hydrophobic is cleaned, and the cleaning method is the same as that of the first embodiment above.

[0083] Other steps are also the same as in Embodiment 1.

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Abstract

The invention provides a preparation method of a super-hydrophobic functional material. The method comprises the steps: firstly, preparing a PDMS (polydimethylsiloxane) thin film; secondly, dropping a dispersing agent with solid particles on the surface of the PDMS and uniformly dispersing the dispersing agent to form a laminar structure; and finally, processing the laminar structure by ultraviolet irradiation or heating to form the material with super-hydrophobic functions. The contact angle of the material can be up to more than 150 degrees after optimization, and meanwhile, the material has a very small rolling angle, so that the requirement of the super-hydrophobic material is satisfied; water drops on the material are difficult to attach and easy to fall off, so that the material still keeps dry and realizes the self-cleaning function. Particles are located on the outermost layer, so that the decomposition of the PDMS resulting from direct solar radiation is avoided and the other functions such as photocatalysis, sterilization and electric conduction except for the hydrophobicity can be realized by using particles. The preparation method is simple and is capable of satisfying the requirements of the large-scale and high-efficiency production.

Description

technical field [0001] The invention relates to a preparation method and a superhydrophobic functional material for preparing a material having both superhydrophobic function and other functions in the fields of coating, chemical industry and biochip. Background technique [0002] With the enhancement of environmental protection awareness and the acceleration of the pace of life, more and more people prefer to use various self-cleaning materials to reduce the burden of housework, such as self-cleaning clothing, self-cleaning furniture, self-cleaning building materials, etc., may into the homes of every common people. At the same time, materials with self-cleaning function often have some superior functions, such as oriented self-cleaning materials can help rainwater collection to solve water shortages, and can be used to separate oil and water according to the different wettability of oil and water... In recent years, with the increase of pollutants such as smog in the urba...

Claims

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Application Information

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IPC IPC(8): B05D1/38B05D3/00B05D3/06
Inventor 孟胜黄永峰
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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