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A kind of preparation method of hollow spherical titanium dioxide modified polyacrylate emulsion

A technology of polyacrylate emulsion and titanium dioxide, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of little contribution to thermal insulation performance and anti-ultraviolet performance, and improve thermal insulation performance, anti-ultraviolet performance and light reflectance Improvement, the effect of elongation at break improvement

Active Publication Date: 2019-05-17
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above research can improve the anti-corrosion performance, water vapor permeability and mechanical properties of polyacrylate film to a certain extent, it does not contribute much to its thermal insulation performance and anti-ultraviolet performance.

Method used

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  • A kind of preparation method of hollow spherical titanium dioxide modified polyacrylate emulsion
  • A kind of preparation method of hollow spherical titanium dioxide modified polyacrylate emulsion
  • A kind of preparation method of hollow spherical titanium dioxide modified polyacrylate emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Disperse 0.1g of tetrabutyl titanate in 35mL of absolute ethanol, stir at a speed of 300rpm for 30min to obtain a suspension of tetrabutyl titanate in absolute ethanol, and then transfer it to a 100mL polytetrafluoroethylene reactor. Raise the temperature to 220°C, react for 2h, cool to room temperature, wash by centrifugation, dry in an oven at 60°C for 8h, and then calcinate in a muffle furnace at 500°C for 5h to obtain hollow spherical titanium dioxide.

[0027] Ultrasonic dispersion of 0.161g of hollow spherical titanium dioxide (the power of ultrasonic dispersion is 500W, and the time is 10min) in 20g of deionized water, and then added to 20g of polyacrylate emulsion, mixed evenly and stirred at 75°C and 300rpm for 8h, the obtained product It is hollow spherical titanium dioxide modified polyacrylate emulsion.

[0028] Wherein, the solid content of the hollow spherical titanium dioxide modified polyacrylate emulsion is 40%.

Embodiment 2

[0030] Disperse 0.3g of tetrabutyl titanate in 35mL of absolute ethanol, and stir at 450rpm for 1h to obtain a suspension of tetrabutyl titanate in absolute ethanol, which is then transferred to a 100mL polytetrafluoroethylene reactor. The temperature was raised to 220°C, the reaction time was 3h, cooled to room temperature, washed by centrifugation, dried in an oven at 60°C for 12h, and then calcined in a muffle furnace at 500°C for 5h to obtain hollow spherical titanium oxide.

[0031] Add 0.196g of hollow spherical titanium dioxide into 25g of polyacrylate emulsion in 20g of deionized water by ultrasonic dispersion (the power of ultrasonic dispersion is 200W, and the time is 20min). It is a hollow spherical titanium dioxide modified polyacrylate emulsion.

[0032] Wherein, the solid content of the hollow spherical titanium dioxide modified polyacrylate emulsion is 40%.

Embodiment 3

[0034] Disperse 0.5g of tetrabutyl titanate in 35mL of absolute ethanol, stir at 450rpm for 2h to obtain a suspension of tetrabutyl titanate in absolute ethanol, and then transfer it to a 100mL polytetrafluoroethylene reactor. The temperature was raised to 200°C, and the reaction time was 4h. After cooling to room temperature, it was centrifuged and washed, dried in an oven at 60°C for 12h, and then calcined in a muffle furnace at 550°C for 4h to obtain hollow spherical titanium dioxide.

[0035] Add 0.238g of hollow spherical titanium dioxide into 30g of polyacrylate emulsion in 20g of deionized water by ultrasonic dispersion (the power of ultrasonic dispersion is 300W, and the time is 18min). It is a hollow spherical titanium dioxide modified polyacrylate emulsion.

[0036] Wherein, the solid content of the hollow spherical titanium dioxide modified polyacrylate emulsion is 45%.

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Abstract

A preparation method of a hollow spherical titanium dioxide modified polyacrylate emulsion comprises the following steps: dispersing tetrabutyl titanate in anhydrous ethanol, stirring the tetrabutyl titanate and the anhydrous ethanol to obtain an anhydrous ethanol suspension of tetrabutyl titanate, transferring the obtained suspension to a reaction kettle, carrying out a reaction at 180-220 DEG C for 2-7 h, cooling the obtained reaction product to room temperature, centrifuged the cooled reaction product, washing the centrifuged reaction product, drying the washed reaction product, and carrying out high temperature calcination to obtain hollow spherical titanium dioxide; and carrying out ultrasonic dispersion on the hollow spherical titanium dioxide in deionized water, adding the obtained dispersion to a polyacrylate emulsion, uniformly mixing the dispersion with the emulsion, and stirring the obtained mixture at 75-80 DEG C for 5-8 h to obtain the hollow spherical titanium dioxide modified polyacrylate emulsion. The heat conduction coefficient of a film formed by using the hollow spherical titanium dioxide modified polyacrylate emulsion is reduced by 27.30%, the light reflectivity of the film is improved by 551.76%, the ultraviolet transmittance of the film is reduced by 46.23%, the tensile strength of the film is improved by 43.68%, and the elongation at break of the film is improved by 87.17%.

Description

technical field [0001] The invention belongs to the technical field of preparation of titanium dioxide and modification of polyacrylate emulsion, in particular to a preparation method of hollow spherical titanium dioxide modified polyacrylate emulsion. Background technique [0002] Titanium dioxide has the advantages of strong infrared reflection ability, good chemical stability, non-toxicity, low cost, and no pollution. It has become a green and environmentally friendly functional material with development prospects. Hollow spherical titanium dioxide not only has the characteristics of general macroporous and mesoporous materials, but also has some excellent properties that other materials cannot match, such as high transparency under visible light, strong light reflection ability, and the air contained in the hollow part has good thermal barrier properties. etc., so there are broad application prospects in the industrial field. [0003] Polyacrylate emulsions are widely u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/03C08K7/24C08L33/04C01G23/053
CPCC01G23/053C01P2004/03C01P2004/04C01P2004/34C08J3/03C08J2333/04C08K7/24C08L33/04
Inventor 鲍艳康巧玲马建中王淑洁
Owner SHAANXI UNIV OF SCI & TECH
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