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Preparation method of superhydrophilic TiO2/SiO2 porous bilaminar membrane

A technology of titanium dioxide and silicon dioxide, which is applied in the field of nanomaterials, can solve problems such as low transmittance and large refractive index, and achieve high transmittance and good anti-fog effect

Active Publication Date: 2012-05-02
NO 510 INST THE FIFTH RES INST OFCHINA AEROSPAE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, titanium dioxide itself has a large refractive index, which will reflect part of the light, resulting in low transmittance, which affects its application.

Method used

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  • Preparation method of superhydrophilic TiO2/SiO2 porous bilaminar membrane
  • Preparation method of superhydrophilic TiO2/SiO2 porous bilaminar membrane
  • Preparation method of superhydrophilic TiO2/SiO2 porous bilaminar membrane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Ultrasonic cleaning of ordinary glass with acetone, absolute ethanol, and deionized water for 15 minutes in sequence.

[0025] (2) Add 10.0 m1 of Ti(OC 4 h 9 ) 4 (content ≥98%, density 0.999-1.003g / ml) dissolved in 350ml of absolute ethanol (analytical purity ≥99.7%, density 0.789-0.791g / ml); then add 14.5 ml of diethanolamine (analytical pure) , stirred vigorously on a constant temperature magnetic stirrer at room temperature for 2 hours; then added a volume ratio of H 2 O:C 2 h 5 OH=1.0ml:10.0 ml mixed solution, continue to stir for about 10 minutes to obtain a uniform, transparent light yellow sol; age at room temperature for 48 hours to obtain a uniform and stable titanium dioxide sol; add polymer polyethylene glycol 2000, A mixed solution of polyethylene glycol 2000 and titanium dioxide was obtained (the mass percentage of polyethylene glycol 2000 was 0.45 %).

[0026] (3) Mix 7.0ml of deionized water and 40.0ml of absolute ethanol, use magnetic stirring ...

Embodiment 2

[0031] (1) Ultrasonic cleaning of ordinary glass with acetone, absolute ethanol, and deionized water for 15 minutes in sequence.

[0032] (2) 12.0 m1 of Ti(OC 4 h 9 ) 4 (content ≥98%, density 0.999-1.003g / ml) dissolved in 400ml of absolute ethanol (analytical purity ≥99.7%, density 0.789-0.791g / ml), then add 15.2 ml of diethanolamine (analytical pure) , stirred vigorously on a constant temperature magnetic stirrer for 2 hours at room temperature, and then added a volume ratio of H 2 O:C 2 h 5 0H=1.08ml: 10.8 ml mixed solution, continue stirring for about 20 minutes, obtain uniform, transparent light yellow sol; aging at room temperature for 50 hours, obtain uniform and stable titanium dioxide sol; add polymer polyethylene glycol 2000 , to obtain a mixture of polyethylene glycol 2000 and titanium dioxide (mass percentage of polyethylene glycol 2000 is 0.5%).

[0033] (3) Mix 9.0ml of deionized water and 40.0ml of absolute ethanol, use magnetic stirring for 25 minutes, and...

Embodiment 3

[0038] (1) Ultrasonic cleaning of ordinary glass with acetone, absolute ethanol, and deionized water for 15 minutes in sequence.

[0039] (2) 12.0 m1 of Ti(OC 4 h 9 ) 4 (content≥98%, density 0.999-1.003g / ml) dissolved in 450ml of absolute ethanol (analytical purity≥99.7%, density 0.789-0.791g / ml), then add 15.5 ml of diethanolamine (analytical pure) , stirred vigorously on a constant temperature magnetic stirrer for 2 hours at room temperature, and then added a volume ratio of H 2 0:C 2 h 5 0H=1.06ml: 10.8 ml mixed solution, continue to stir for 30 minutes, obtain uniform, transparent light yellow sol; Aging at room temperature for 50 hours, obtained uniform and stable titanium dioxide sol; Add polymer polyethylene glycol 2000, obtain A mixed solution of polyethylene glycol 2000 and titanium dioxide (0.5% by mass of polyethylene glycol 2000).

[0040] (3) Mix 10.0ml of deionized water and 45.0ml of absolute ethanol, use magnetic stirring for 35 minutes, and record it as ...

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Abstract

The invention which provides a preparation method of a superhydrophilic TiO2 / SiO2 porous bilaminar membrane which has a high transmittance and can perform the superhydrophilicity under visible light belongs to the technical field of nanomaterials. The method comprises the following steps: 1, carrying out spin coating on a glass substrate with an SiO2 sol, drying, carrying out spin coating with a mixed solution of polyethylene glycol 2000 and TiO2, and drying the glass substrate in a drying box for 20-40min at 80-120DEG C; 2, heating the dried glass substrate in a muffle furnace to 450-550DEG C according to a heating rate of 2-3DEG C / min, and annealing for 2-3h; and 3, naturally cooling to room temperature after completing the anneal to obtain the superhydrophilic TiO2 / SiO2 porous bilaminar membrane. The prepared superhydrophilic TiO2 / SiO2 porous bilaminar membrane of the invention, which has a highly ordered porous structure and a high transmittance, can perform the superhydrophilicity under visible light and has a good antifog effect, can be applied to various antifog occasions of building glass, automobile rearview windows, windscreens, bathroom glass and the like.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and relates to a method for preparing a titanium dioxide / silicon dioxide porous double-layer membrane, in particular to a preparation method of a titanium dioxide / silicon dioxide porous double-layer membrane exhibiting superhydrophilic properties under visible light conditions method. technical background [0002] TiO 2 As an inorganic material, it has the advantages of good chemical stability, wear resistance, high catalytic activity, strong oxidation ability, and low cost. It has been widely used in various fields such as solar cells, photocatalysis, and sensitive devices. . In recent years, the preparation of titanium dioxide thin films and their superhydrophilic properties under visible light have attracted much attention. [0003] Titanium dioxide film is super-hydrophilic under ultraviolet light, and the film is coated on the surface of glass, ceramics, polymers and metals. The moi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/34C09K3/18
Inventor 王多书熊玉卿李晨王济洲王军军王建李燕
Owner NO 510 INST THE FIFTH RES INST OFCHINA AEROSPAE SCI & TECH
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