Hollow glass bead/titanium dioxide membrane composite material and preparation method thereof

A technology of hollow glass microspheres and thin film composite materials, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of uneven coating, titanium dioxide coating Low coverage rate and other issues, to achieve the effect of high photocatalytic activity, stable reaction, and low reaction temperature

Active Publication Date: 2018-12-11
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned technical problems in the related art, the present invention provides a hollow glass microsphere/titanium dioxide film composite material and i

Method used

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  • Hollow glass bead/titanium dioxide membrane composite material and preparation method thereof
  • Hollow glass bead/titanium dioxide membrane composite material and preparation method thereof
  • Hollow glass bead/titanium dioxide membrane composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The volume ratio of tetrabutyl titanate, absolute ethanol, distilled water and glacial acetic acid is 1:2.5:0.2:0.15. Completely mix two parts of absolute ethanol with 2 / 3 of the total volume with tetrabutyl titanate and glacial acetic acid, and stir in a constant temperature water bath at 30°C at 300r / min for 40min to obtain a tetrabutyl titanate solution. The other 1 / 3 of absolute ethanol is fully mixed with water and a pH regulator to obtain a mixed aqueous solution, and the obtained mixed aqueous solution is evenly added dropwise to the tetrabutyl titanate solution at a speed of 1ml / min, and a uniform light yellow transparent sol is obtained after the drop is completed , control the pH value of the system at 3.5, continue to stir for 40 minutes, and then place it in the refrigerator for later use.

[0048] Take 3g of hollow glass microspheres, immerse in 100ml of organic solvent washing solution with a volume ratio of ethanol and distilled water of 10:1, ultrasonica...

Embodiment 2

[0052] The volume ratio of tetrabutyl titanate, absolute ethanol, distilled water and glacial acetic acid is 1:3.0:0.18:0.25. Two parts of absolute ethanol were integrated according to the total volume, and 2 / 3 of the total volume was fully mixed with tetrabutyl titanate and glacial acetic acid, stirred at 300 r / min in a constant temperature water bath at 30°C for 30 minutes to obtain a tetrabutyl titanate solution. The other 1 / 3 of absolute ethanol was thoroughly mixed with water and a pH regulator to obtain a mixed aqueous solution, and the obtained mixed aqueous solution was evenly added dropwise to the tetrabutyl titanate solution at a speed of 2 ml / min. After dripping, a uniform light yellow transparent sol was obtained. The pH value of the system was controlled at 3, and the stirring was continued for 30 minutes, and then placed in the refrigerator for later use.

[0053] Take 3g of hollow glass microspheres, immerse in 100ml of organic solvent washing liquid with a volu...

Embodiment 3

[0057] The volume ratio of tetrabutyl titanate, absolute ethanol, distilled water and glacial acetic acid is 1:3.5:0.15:0.35. Completely mix two parts of absolute ethanol with 2 / 3 of the total volume with tetrabutyl titanate and glacial acetic acid, stir in a constant temperature water bath at 25°C at 300r / min for 20min to obtain a tetrabutyl titanate solution. The other 1 / 3 of absolute ethanol was thoroughly mixed with water and a pH regulator to obtain a mixed aqueous solution, and the obtained mixed aqueous solution was evenly added dropwise to the tetrabutyl titanate solution at a speed of 3 ml / min. After dripping, a uniform light yellow transparent sol was obtained. The pH value of the system was controlled at 2, and the stirring was continued for 20 minutes, and then placed in the refrigerator for later use.

[0058] Take 3g of hollow glass microspheres, immerse in 100ml of organic solvent washing solution with a volume ratio of ethanol and distilled water of 8:1, ultras...

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Abstract

The invention provides a hollow glass bead/titanium dioxide membrane composite material and a preparation method thereof. The composite material is of a core-shell structure; and the thickness of a titanium dioxide membrane is 0.3-0.7 microns, the titanium dioxide exists in an anatase type, and the coating quantity is 5-25 percent. The method comprises the following steps of mixing and dissolvingabsolute ethyl alcohol, tetrabutyl titanate and glacial acetic acid, and then dropwise adding a mixed aqueous solution obtained by mixing the absolute ethyl alcohol, water and a pH regulator in a tetrabutyl titanate solution to prepare a titanium dioxide sol; performing ultrasonic cleaning on a hollow glass bead to remove impurities on the surface and perform alkali activation on the surface; andadding the activated hollow glass bead in the titanium dioxide sol, and performing standing and ageing to realize uniformity and compactness of coating of the surface of the hollow glass bead. The hollow glass bead/titanium dioxide membrane composite material and the preparation method solve the problems of low coating ratio of titanium dioxide, unevenness and looseness in a coating layer, low near-infrared band reflectivity and the like.

Description

technical field [0001] The invention relates to the technical field of functional inorganic non-metallic materials, in particular to a hollow glass microsphere / titanium dioxide film composite material and a preparation method thereof. Background technique [0002] Hollow glass microsphere is a material with hollow structure, small thermal conductivity, low density and good heat preservation effect. It is widely used in hydrogen storage, nuclear fusion, emulsion explosives, deep sea exploration, aerospace, etc., and is often used in construction and Industrial thermal insulation, etc. The refractive index of titanium dioxide is 2.5-2.8, and the band gap is 3.2eV. It has the superior performance of large refractive index and high near-infrared reflectivity among oxides. Combining the advantages of the two, a layer of titanium dioxide film is coated on the surface of the hollow glass microspheres, which can not only maintain the heat insulation performance of the hollow glass ...

Claims

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Application Information

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IPC IPC(8): B01J23/04B01J35/02B01J35/06C09D7/62C08K9/10C08K7/28
CPCB01J23/04B01J35/004B01J35/023B01J35/065C08K7/28C08K9/10C09D7/62C09D7/70
Inventor 蒋崇文龙杰宋曲之朱俊东王偶和
Owner CENT SOUTH UNIV
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