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Method for preparing silicon dioxide/titanium dioxide composite film containing branch porous structure on substrate

A technology of silicon dioxide and titanium dioxide, applied in the coating and other directions, can solve the problems of super hydrophilic effect failure and other problems, and achieve the effect of good wear resistance, unique design and simple equipment

Active Publication Date: 2019-09-24
FUJIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, there are still very few research reports on the function of superhydrophilicity and water storage. It is an innovative work to prepare a structure with regular pores to achieve the performance of absorbing water, transporting water and storing water; Regarding the durability of the super-hydrophilic coating, since the surface of the hydrophilic oxide contains a large number of hydroxyl groups that have the characteristics of absorbing water, it shows super-hydrophilic anti-fog properties macroscopically, but as time goes on, its surface The hydroxyl content of the coating gradually decreases, and the super-hydrophilic effect will gradually fail. Therefore, the development of a high-efficiency and long-lasting super-hydrophilic coating has become a frontier topic in current development.

Method used

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  • Method for preparing silicon dioxide/titanium dioxide composite film containing branch porous structure on substrate
  • Method for preparing silicon dioxide/titanium dioxide composite film containing branch porous structure on substrate
  • Method for preparing silicon dioxide/titanium dioxide composite film containing branch porous structure on substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Surface polishing: the ordinary float glass with length 50mm×width 30mm×height 1mm is first soaked in acetone for 10-60 minutes, then ultrasonically washed with ethanol solution for 5-60 minutes, and then cleaned with deionized water to obtain a clean surface. substrate.

[0040] (2) Preparation of sol mixture:

[0041] Preparation of titanium dioxide sol: Pour 120mL of absolute ethanol into a dry beaker, then slowly drop 30mL of butyl titanate into the beaker at a rate of 0.2mL per minute, and stir at a speed of 800r / s for 10 minutes; Then slowly add 2 mL of acetylacetone dropwise at a rate of 0.2 mL per minute, and continue to stir vigorously at a rate of 800 r / s for 10 min; add catalyst nitric acid dropwise at a rate of 0.2 mL per minute to adjust the pH to 2-3 In between, stir for 1 h to obtain titanium dioxide sol.

[0042] Preparation of silica sol: add 4mL tetraethyl orthosilicate, 4mL, and 4m deionized water into a beaker and stir; add 2mL of ammonia water...

Embodiment 2

[0046] (1) Ordinary float glass with a length of 50 mm × width 30 mm × height 1 mm is first soaked in acetone for 10-60 min, then ultrasonically washed with ethanol solution for 5-60 min, and then cleaned with deionized water to obtain a substrate with a clean surface.

[0047] (2) Preparation of sol mixture

[0048] Preparation of titanium dioxide sol: Pour 120mL of absolute ethanol into a dry beaker, then slowly drop 30mL of butyl titanate into the beaker at a rate of 0.2mL per minute, and stir at a speed of 800r / s for 10 minutes; Then slowly add 2 mL of acetylacetone dropwise at a rate of 0.2 mL per minute, and continue to stir vigorously at a rate of 800 r / s for 10 min; add catalyst nitric acid dropwise at a rate of 0.2 mL per minute to adjust the pH to 2-3 In between, stir for 1 h to obtain titanium dioxide sol.

[0049] Preparation of silica sol: add 4mL tetraethyl orthosilicate, 4mL, and 4m deionized water into a beaker and stir; add 2mL of ammonia water (concentration...

Embodiment 3

[0053] (1) Surface polishing: the ordinary float glass with length 50mm×width 30mm×height 1mm is first soaked in acetone for 10-60 minutes, then ultrasonically washed with ethanol solution for 5-60 minutes, and then cleaned with deionized water to obtain a clean surface. substrate.

[0054] (2) Preparation of sol mixture:

[0055] Preparation of titanium dioxide sol: Pour 120mL of absolute ethanol into a dry beaker, then slowly drop 30mL of butyl titanate into the beaker at a rate of 0.2mL per minute, and stir at a speed of 800r / s for 10 minutes; Then slowly add 2 mL of acetylacetone dropwise at a rate of 0.2 mL per minute, and continue to stir vigorously at a rate of 800 r / s for 10 min; add catalyst nitric acid dropwise at a rate of 0.2 mL per minute to adjust the pH to 2-3 In between, stir for 1 h to obtain titanium dioxide sol.

[0056] Preparation of silica sol: add 4mL tetraethyl orthosilicate, 4mL, and 4m deionized water into a beaker and stir; add 2mL of ammonia water...

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Abstract

The invention relates to a porous structure control method for preparing a functional oxide SiO2 / TiO2 composite film on a substrate through a low-temperature sol-gel method, and belongs to the field of nanometer function material preparation. Ethyl orhosilicate is adopted as a raw material for preparing SiO2 sol, butyl titanate is adopted as a raw material for preparing TiO2 sol, the two kinds of sol are mixed according to a certain ratio, and the prepared SiO2 / TiO2 composite film has abundant regular branch-shaped structures, and by controlling the cross linking reaction among a high-molecular polymer, the SiO2 sol and the TiO2 sol, the porous structure is effectively controlled. The coating is unique in structural design, and the porous structure distributed regularly in a branch shape is shown; the porous structure facilitates water conveying and storage water characteristics, the super-hydrophilic effect and the durability are good, and the self-cleaning function film material is excellent in performance.

Description

technical field [0001] The invention relates to a method for preparing SiO with dendritic hole structure on a substrate 2 / TiO 2 The method of composite thin film, especially relates to a kind of low-temperature sol-gel method to prepare a kind of functional oxide SiO on the substrate 2 / TiO 2 The invention relates to a method for regulating the pore structure of a composite film, which belongs to the field of preparation of nano functional materials. Background technique [0002] Self-cleaning glass (Self-cleaning glass) refers to the special physical or chemical treatment of ordinary glass, which produces unique physical and chemical properties on the surface, so that the glass can achieve cleaning effect without traditional manual scrubbing methods. Glass. Anti-fogging glass refers to the special treatment of ordinary glass to make the surface super-hydrophilic, so that the tiny water droplets formed due to atomization can be quickly flattened, so that it has self-cle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/00
CPCC03C17/002C03C17/006C03C2218/11C03C2218/32
Inventor 吴玉萍王乾廷孙炜王逸斌陈钟辉林本祥雷鸣
Owner FUJIAN UNIV OF TECH
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