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A kind of preparation method of superhydrophobic elastomer

An elastomer and super-hydrophobic technology, which is applied in the field of preparation of super-hydrophobic elastomers, can solve problems such as easy peeling of coatings, cumbersome preparation methods, and threats to human health, achieving good adhesion, little harm to human body and environment, and improved The effect of hydrophobicity

Active Publication Date: 2018-08-03
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although these methods can prepare superhydrophobic materials, the preparation methods are cumbersome, and there are certain difficulties in practical application; and most methods are not well connected with the substrate, causing the coating to fall off easily, which seriously affects the performance of the material; in addition, the existing For the research on superhydrophobic materials, most of them need to use fluorine-containing materials. As we all know, fluorine-containing materials are more harmful to human bones, and there are potential threats to human health when the materials are applied. The preparation of superhydrophobic materials without filling fluorine-containing materials will become The development direction of superhydrophobic materials in the future

Method used

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  • A kind of preparation method of superhydrophobic elastomer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1: SiO 2 Modified by KH580:

[0028] Mix 10ml deionized water and 90ml ethanol, adjust the pH to 3 with acetic acid, add 1g SiO 2 (average particle diameter: 12 nm), ultrasonic dispersion was carried out to obtain a dispersion liquid. Add 0.1 g of KH580 to the dispersion liquid, raise the temperature to 80°C and react for 8 hours. Centrifugal washing and drying to obtain KH580 modified SiO 2 ;

[0029] Step 2: SiO 2 Surface modification of vinyl POSS:

[0030] KH580 modified SiO 2 Disperse in 500ml tetrahydrofuran, ultrasonically disperse for 2 hours, after obtaining the dispersion, add 0.5g vinyl POSS and 0.01g benzophenone, under ultraviolet light (the light source is a 500W high pressure mercury lamp, the wavelength is between 320nm and 420nm) Stir the reaction for 0.5 hours, and obtain SiO grafted with vinyl POSS after centrifugal drying 2 ;

[0031] Step 3: Dissolve 1g of styrene-butadiene rubber and 0.01g of benzophenone in 10ml of tetrahydrofuran, i...

Embodiment 2

[0034] Step 1: SiO 2 Modified by KH580:

[0035] Mix 10ml deionized water and 90ml ethanol, adjust the pH to 4 with acetic acid, add 1g SiO 2 (average particle diameter: 14 nm), ultrasonic dispersion was carried out to obtain a dispersion liquid. Add 0.2g of KH580 to the dispersion liquid, raise the temperature to 75°C and react for 6 hours. Centrifugal washing and drying to obtain KH580 modified SiO 2 ;

[0036] Step 2: SiO 2 Surface modification of vinyl POSS:

[0037] KH580 modified SiO 2Disperse in 500ml tetrahydrofuran, ultrasonically disperse for 2 hours, after obtaining the dispersion liquid, add 0.8g vinyl POSS and 0.02g 2-methyl-1-[4-(methylthio)phenyl]-2-(4-mol Linyl)-1-acetone, stirred and reacted for 0.5 hours under ultraviolet light (the light source is a 500W high-pressure mercury lamp, the wavelength is between 320nm and 420nm), and obtained SiO grafted with vinyl POSS after centrifugal drying 2 ;

[0038] Step 3: Dissolve 1g of styrene-butadiene rubber...

Embodiment 3

[0041] Step 1: SiO 2 Modified by KH580:

[0042] Mix 10ml of deionized water and 90ml of ethanol, adjust the pH to 5 with acetic acid, add 1g of SiO 2 (average particle diameter: 500 nm), ultrasonic dispersion was carried out to obtain a dispersion liquid. Add 0.05g of KH580 to the dispersion liquid, raise the temperature to 60°C and react for 4 hours. Centrifugal washing and drying to obtain KH580 modified SiO 2 ;

[0043] Step 2: SiO 2 Surface modification of vinyl POSS:

[0044] KH580 modified SiO 2 Disperse in 500ml tetrahydrofuran, ultrasonically disperse for 2 hours, after obtaining the dispersion liquid, add 0.5g vinyl POSS and 0.01g 1-hydroxycyclohexyl benzophenone, under ultraviolet light (light source is 500W high-pressure mercury lamp, wavelength between 320nm and 420nm Between) under stirring reaction 0.5 hour, obtain the SiO of grafted vinyl POSS after centrifugal drying 2 ;

[0045] Step 3: Dissolve 1g of methyl vinyl silicone rubber and 0.01g of 1-hydro...

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Abstract

The invention relates to a preparation method of superhydrophobic rubber, which belongs to the field of polymer materials. The invention improves the hydrophobicity of the SiO2 by grafting hydrophobic vinyl POSS on the surface of the SiO2, and uses the modified SiO2 to construct a surface micro-nano structure on the surface of the elastomer to obtain a superhydrophobic elastomer. Its static contact angle can reach 155.6°, and a good bond is formed between the hydrophobic coating and the elastomer, that is, the adhesion is very good, and grinding will not significantly reduce the hydrophobicity of the superhydrophobic elastomer. Compared with the prior art, the present invention does not need to add fluorine-containing materials, and has little harm to human body and environment.

Description

Technical field: [0001] The invention relates to a preparation method of a superhydrophobic elastomer, which belongs to the field of polymer materials. Background technique: [0002] Elastomer refers to a polymer material that deforms significantly under weak stress and can quickly return to its original state and size after stress relaxation. Due to its special mechanical properties, it plays an extremely important role in daily necessities, medicine, excavation, construction and other fields. [0003] However, for most elastomers, the static contact angle is less than 110°, even less than 90°. For such a surface, water vapor in the air will condense on the surface, and it will freeze even more in cold environments such as winter, which seriously affects the use of materials. Such materials are not suitable for use in environments with high air humidity and low temperature. [0004] The superhydrophobic material on the surface of the lotus leaf refers to a new type of ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/18C08L9/06C08L83/07C08L23/22C08L7/00C08F292/00C08K9/06C08K3/36
Inventor 田明张志韬宁南英张立群
Owner BEIJING UNIV OF CHEM TECH