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Method for constructing superhydrophilic and anti-reflection and moisture-proof composite film on glass substrate

A technology of glass substrate and composite film, which is applied in the field of nano-material preparation, can solve the problems of losing super-hydrophilic ability, the maintenance time of super-hydrophilic performance is not long, and the inability to realize super-hydrophilic self-cleaning, etc., and achieve good light transmittance , good mechanical properties

Active Publication Date: 2017-12-15
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the shortcoming of this kind of mesoporous silica film is: on the one hand, the superhydrophilic property does not last for a long time. Once the organic pollutants in the air are adsorbed on the surface of the film, that is, covering hydrophilic groups such as hydroxyl groups, the film loses its superhydrophilic properties. superhydrophilic ability
The film prepared by this method not only has strong photo-induced superhydrophilicity, but also can effectively degrade organic pollutants, but it cannot achieve superhydrophilic self-cleaning in indoor or dark environments.

Method used

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  • Method for constructing superhydrophilic and anti-reflection and moisture-proof composite film on glass substrate
  • Method for constructing superhydrophilic and anti-reflection and moisture-proof composite film on glass substrate
  • Method for constructing superhydrophilic and anti-reflection and moisture-proof composite film on glass substrate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of sol solution containing silica hollow sphere nanoparticles:

[0038] 0.1 gram, 0.3 gram and 0.7 gram of polyacrylic acid were dissolved in 4.5 milliliters of ammonia water (the concentration of polyacrylic acid in ammonia water was 30 wt %), and ultrasonically dispersed for 10 minutes; In the container, stirred for 15 minutes to obtain a mixed solution; 1.5 milliliters to 2.5 milliliters of tetraethoxysilane was added dropwise to the mixed solution at a rate of 45 microliters per minute; °C) was stirred for 10 hours to obtain a sol solution containing silica hollow sphere nanoparticles.

[0039] When the quality of polyacrylic acid was 0.1 gram, 0.3 gram and 0.7 gram respectively, the average particle diameters of the silica hollow sphere nanoparticles in the sol solution of prepared silica hollow sphere nanoparticles were 36 nanometers and 42 nanometers respectively. and 93 nm.

Embodiment 2

[0041] Dissolve 0.2 gram to 0.4 gram of polyacrylic acid in 4.5 milliliters of ammonia water (the concentration of polyacrylic acid in ammonia water is 30 wt %), and ultrasonically disperse it for 10 minutes; then add it dropwise into a container equipped with 90 milliliters of absolute ethanol, stir Obtain mixed solution in 15 minutes; The tetraethoxysilane of 1 milliliter, 2 milliliters and 4 milliliters is added drop-wise in the above-mentioned mixed solution with the speed of 45 microliters per minute respectively; After dropping, gained solution is at room temperature (25 °C) was stirred for 10 hours to obtain a sol solution containing silica hollow sphere nanoparticles.

[0042] When the volume of tetraethoxysilane was 1 milliliter, 2 milliliters and 4 milliliters respectively, the average particle diameter of the silica hollow sphere nanoparticles in the sol solution of prepared silica hollow sphere nanoparticles was respectively 40 nanometers , 45nm and 55nm.

Embodiment 3

[0044] Preparation of sol solution containing hollow spherical nanoparticles with silica / titania double-layer structure:

[0045] (1) Preparation of a sol solution containing silica hollow sphere nanoparticles: 0.2 gram to 0.4 gram of polyacrylic acid is dissolved in 4.5 milliliters of ammonia (the concentration of polyacrylic acid in ammonia water is 30 wt %), ultrasonic dispersion (general ultrasonic dispersion The time is about 10 minutes); then dropwise added to the container loaded with 90 milliliters of absolute ethanol, stirring (general stirring time is about 15 minutes) to obtain a mixed solution; 1.5 milliliters to 2.5 milliliters of tetraethoxy Silane was added dropwise to the mixed solution at a rate of 45 microliters per minute; after the dropwise addition, the resulting solution was stirred at room temperature (25°C) (generally, the stirring time was about 10 hours), and a hollow compound containing silica was obtained. Colloidal solution of spherical nanoparticl...

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Abstract

The invention relates to a method for constructing a composite thin film with good mechanical properties, superhydrophilicity and anti-reflection and anti-humidity functions on a glass substrate. The present invention first prepares the sol liquid containing silica hollow sphere nanoparticles, and the sol liquid containing silica / titania double-layer structure hollow sphere nanoparticles; In the sol solution of the spherical nanoparticles, the pulling method is adopted and the organic matter is removed by calcining, so that the titanium dioxide forms an anatase crystal form, and the composite thin film is prepared on the glass substrate. The preparation method of the invention is simple and the production cost is low. The highest light transmittance of the glass substrate with the composite film on the surface is increased from 92.1% of the blank glass substrate to 99.3%. The contact angle of water on its surface is 0-1°, and it does not absorb moisture in a high-humidity environment (humidity range 20%-95%), and can maintain a good anti-reflection effect, especially suitable for outdoor applications.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a method for constructing a composite thin film with good mechanical properties, superhydrophilicity and anti-reflection and anti-humidity functions on a glass substrate. Background technique [0002] With the growth of the global population and the rapid development of the economy, the problems of energy shortage and environmental pollution have become increasingly prominent. Existing fossil energy is a non-renewable energy, facing the problem of exhaustion. Solar energy is inexhaustible and inexhaustible clean energy, and the research and utilization of solar energy is of great significance to solving the energy crisis and environmental protection. [0003] Although solar photovoltaic power generation is a clean and non-polluting power generation technology, it is still unable to compete with thermal power generation due to higher costs and lower p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/23
Inventor 贺军辉姚琳
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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