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Ultra-hydrophobic nanometer SiO2/high polymer complex film and preparation method thereof

A technology of high polymer and composite film, applied in the field of super-hydrophobic nano-SiO2/polymer composite film and its preparation, can solve the problems of lack of strength, easy gelation, loss of flow properties, etc., and achieve good film-forming performance, Simple process, the effect of reducing surface tension

Active Publication Date: 2009-09-30
JIANGSU RUIYING ADVANCED MATERIALS TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The membrane made by this method, because the surface is made of porous SiO 2 Composed of airgel, it has superhydrophobic properties, but the membrane basically has no strength
On the other hand, the prepared SiO 2 The sol is not suitable for storage, it is easy to gel and lose its fluidity
In order to improve the strength of the film, some researchers also made the SiO 2 The airgel film is calcined at high temperature to make it densified, but the film substrate must also be able to withstand high temperature, and this method cannot be implemented for polymer substrates

Method used

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  • Ultra-hydrophobic nanometer SiO2/high polymer complex film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Put 100g of PEDS (viscosity at 1,000cp) and 100g of MPEG (molecular weight: 1,000) into a 500ml three-necked flask and stir evenly, and carry out transesterification at 70°C for 3 hours. At the same time, under 4.0KPa reduced pressure, the The product ethanol was extracted to obtain the MPEG-g-PEDS graft polymer. Dissolve 7.5g of water in 20ml of ethanol, add it to a three-neck flask, stir vigorously for 10 minutes, pour it into a 1,000ml beaker, and after about 30 minutes, the gel solidifies, then crushes the gel, puts it in a vacuum drying oven, and Aging at 110°C for 4 hours while continuously extracting product ethanol to obtain SiO 2 wet gel. Weigh 50g SiO2 2 The wet gel was mixed with 50 g of toluene, and the SiO 2 The wet gel was dispersed in toluene to prepare a slurry, and the ball milling time was 6 hours. the SiO 2 The wet gel particle dispersion slurry is mixed evenly with 500 g of polystyrene (PS) / toluene solution with a mass concentration of 10%, and ...

Embodiment 2

[0025]Put 100g of PEDS (viscosity at 5,000cp), 100g of MPEG (molecular weight of 1,000), and 100ml of ethanol into a 500ml three-necked flask and stir evenly. After transesterification at 65°C for 4 hours, start to depressurize at 8.0KPa Extraction, part of the product ethanol is extracted. Dissolve 5g of water in 20ml of ethanol, add it to a three-neck flask, stir vigorously for 10 minutes, pour it into a 1,000ml beaker, after about 20 minutes, the gel solidifies, then crush the gel, put it in a vacuum drying oven, and dry it at 130 ℃ aging for 5 hours while continuously extracting the product ethanol to obtain SiO 2 wet gel. Weigh 50g SiO2 2 The wet gel was mixed with 50 g of toluene, and the SiO 2 The wet gel was dispersed in toluene to prepare a slurry, and the ball milling time was 8 hours. the SiO 2 The wet gel particle dispersion slurry is mixed evenly with 1,000 g of 10% polystyrene (PS) / toluene solution, then coated on the substrate, and dried to form a film unde...

Embodiment 3

[0027] Put 100g of PEDS (viscosity at 1,000cp) and 200g of MPEG (molecular weight: 400) into a 500ml three-necked flask and stir evenly. After transesterification at 60°C for 2 hours, extract under reduced pressure at 3.0KPa at the same time. Extract part of the product ethanol to obtain MPEG-g-PEDS graft polymer. Dissolve 7g of water in 20ml of ethanol, add it to a three-necked flask, stir vigorously for 10 minutes, pour it into a 1,000ml beaker, and after about 20 minutes, the gel solidifies, then crush the gel, put it in a vacuum drying oven, and dry it at 120 ℃ aging for 6 hours while continuously extracting the product ethanol to obtain SiO 2 wet gel. Weigh 50g SiO2 2 The wet gel was mixed with 50 g of toluene, and the SiO 2 The wet gel was dispersed in toluene to prepare a slurry, and the ball milling time was 7 hours. the SiO 2 Wet gel particle dispersion slurry and 700g mass concentration are 10% styrene-butadiene-styrene (SBS) / toluene solution and mix uniformly, ...

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Abstract

The invention relates to an ultra-hydrophobic nanometer SiO2 / high polymer complex film and a preparation method thereof. The method comprises the following steps: carrying out an ester exchange reaction of MPEG and PEDS to synthesize an MPEG-g-PEDS graft polymer; adding a certain amount of water to the MPEG-g-PEDS graft polymer for a solation-gelation reaction; then, grinding and pulverizing gel, dispersing the gel powder as a filling to a high polymer solution; and coating the solution on a basal material and drying to form a film. The complex film is soaked in a water / alcohol solution, uses a surface dressing agent for the self assembly of surface molecules, uses normal hexane to wash away residual liquid and is dried so as to obtain the ultra-hydrophobic nanometer SiO2 / high polymer complex film.

Description

Technical field: [0001] The present invention relates to a SiO 2 Airgel / polymer composite film and its preparation method; especially relate to a kind of superhydrophobic nano-SiO 2 / High polymer composite film and preparation method thereof. Background technique: [0002] Superhydrophobic usually refers to its water contact angle CA>150°. The water contact angle can be improved from two aspects: 1. Reducing the surface tension of the substrate; 2. Constructing a rough surface. At present, the material with the largest water contact angle is tetrafluoroethylene, and its contact angle is 117°. Therefore, to prepare a superhydrophobic material, it is necessary to construct a micro / nano hierarchical structure similar to the "lotus leaf surface". Superhydrophobic materials have a self-cleaning effect and a low-resistance effect in contact with liquids, which can be used for example: automotive glass windows, which can save wipers; pipe inner walls, reduce resistance, and r...

Claims

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Application Information

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IPC IPC(8): C08L101/00C08K3/36C08J5/18
Inventor 沈晓冬江国栋
Owner JIANGSU RUIYING ADVANCED MATERIALS TECH DEV CO LTD
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