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A kind of polystyrene/polysiloxane superhydrophobic composite film and preparation method thereof

A technology of polysiloxane and polystyrene, applied in the field of superhydrophobic, can solve the problems of poor heat resistance and ultraviolet resistance, hinder the application of superhydrophobic coating, environmental pollution, etc., and achieve high temperature resistance and ultraviolet resistance Excellent, excellent super-hydrophobic performance, good transparency effect

Active Publication Date: 2021-09-07
南京奥联光能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on these two ideas, many methods and technologies have been applied to the manufacture of super-hydrophobic surfaces, but most of the preparation of super-hydrophobic coatings requires treatment with toxic fluorinated agents, causing environmental pollution, and poor heat resistance and UV resistance, hindering application of superhydrophobic coatings

Method used

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  • A kind of polystyrene/polysiloxane superhydrophobic composite film and preparation method thereof
  • A kind of polystyrene/polysiloxane superhydrophobic composite film and preparation method thereof
  • A kind of polystyrene/polysiloxane superhydrophobic composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Provide a kind of preparation method of polystyrene / polysiloxane superhydrophobic composite film, specifically comprise the following steps:

[0039] 1) Synthesis of polystyrene: Take 50ml of styrene monomer, remove the polymerization inhibitor and add to a 300ml deionized water beaker dissolved with 0.65g of potassium persulfate and 0.3g of sodium lauryl sulfate. Put the beaker into an oil bath at 80°C, blow nitrogen gas for 10 minutes, adjust the rotation speed to 600 rpm, and react for 24 hours.

[0040] 2) Configuration of polystyrene aqueous dispersion: the polystyrene emulsion obtained in step 1) was left to stand for 3 days, ultrasonicated for half an hour to break the emulsion, then washed 7 times with deionized water, and its mass fraction was diluted to 1.2% , to obtain polystyrene aqueous dispersion;

[0041] 3) Preparation of an aqueous solution of sodium alkylsiliconate: take 0.533 g of an aqueous solution of sodium alkylsiliconate (30% by mass), and add d...

Embodiment 2

[0055] 1) synthesis of polystyrene: with embodiment 1

[0056] 2) configuration of polystyrene aqueous dispersion: with embodiment 1

[0057] 3) preparation of sodium alkyl silanolate aqueous solution: with embodiment 1

[0058] 4) Preparation of super-hydrophobic film: Same as in Example 1, except that the glass substrate is replaced by concrete, iron block, wood block, paper sheet, and metal mesh substrate.

[0059] Image 6 , 7 , 8, 9 and 10 are the test results of concrete, iron block, wood block, paper sheet, and metal mesh as the substrates respectively. It can be seen that this method can be applied to the construction of superhydrophobic coatings on various substrates.

Embodiment 3

[0061] 1) synthesis of polystyrene: with embodiment 1

[0062] 2) configuration of polystyrene aqueous dispersion: with embodiment 1

[0063] 3) Preparation of aqueous solution of sodium alkyl siliconate: take 0.282g, 0.4g, 0.686g, 0.862g, 1.067g aqueous solution of sodium alkyl siliconate (mass fraction is 30%), add deionized water to 20g;

[0064] 4) Preparation of superhydrophobic film: Same as in Example 1, the mass percentages of polystyrene in the obtained polystyrene / polymethylsilane superhydrophobic composite film were 85%, 80%, 70%, 65% and 60%, respectively.

[0065] Figure 11 It is the actual shot of the light transmittance of the glass-based polystyrene / polymethylsilane superhydrophobic composite film prepared in Example 1 and Example 3. From left to right in the figure, the mass percentages of polystyrene are 85%, 80%, 75%, 70%, 65% and 60%. The figure shows that the superhydrophobic composite film has good light transmission and can be applied to waterproofing...

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Abstract

The invention discloses a polystyrene / polysiloxane superhydrophobic composite film and a preparation method thereof. The super-hydrophobic composite film is composed of polystyrene particles and polysiloxane, the polystyrene particles are uniformly arranged in the polysiloxane structure, and the polystyrene particle content is 60-85% by mass percentage . Its preparation is as follows: the polystyrene particles synthesized by soap-free emulsion polymerization are demulsified, washed with water, and then added with water to make a polystyrene aqueous dispersion solution, then mixed with an aqueous solution of sodium alkyl silanolate, sprayed on the substrate, and placed in CO 2 environment, the sodium alkyl silanolate is hydrolyzed and further polymerized to obtain a polysiloxane structure, that is, a polystyrene / polysiloxane superhydrophobic composite film. The superhydrophobic composite film has good transparency, excellent ultraviolet resistance and high temperature resistance, low temperature required for spraying, and is suitable for most substrates. The preparation process is a water-based system, which is environmentally friendly, low in cost, and can be widely used.

Description

technical field [0001] The invention belongs to the field of superhydrophobic, and in particular relates to a polystyrene / polysiloxane superhydrophobic composite film and a preparation method thereof. Background technique [0002] Wettability is an important property of a solid surface, and the contact angle of a droplet on a solid surface is the most direct expression of wettability. In general, a solid surface with a contact angle greater than 150° and a rolling angle less than 10° is called a superhydrophobic surface. In nature, the phenomenon of superhydrophobicity is ubiquitous and has attracted widespread attention of scientists. The most typical one is the surface of lotus leaves, on which droplets can roll freely and take away the dirt on the surface. This self-cleaning Features are often referred to as the "lotus leaf effect". In recent years, superhydrophobic surfaces based on the "lotus leaf effect" have been widely used in industry and daily life due to their s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D125/06C09D183/04C09D5/00
CPCC08L2201/08C08L2201/10C09D5/00C09D5/18C09D125/06C08L83/04
Inventor 钟杰文敏姚铭张积波张奇
Owner 南京奥联光能科技有限公司
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