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Low-temperature preparation method of TiO2-based organic/inorganic compound photocatalysis flexible film

A flexible film and inorganic composite technology, applied in the direction of coating, etc., can solve the problems of limited application, and achieve the effects of low temperature, excellent photocatalytic performance and good coating performance

Active Publication Date: 2013-01-09
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method is simple and convenient, and the direct use of tetrabutyl titanate precursor avoids the TiO 2 Agglomeration of particles, but in getting anatase TiO 2 Crystal-shaped composite films must be calcined at a high temperature of 500°C, which puts high demands on the film-forming substrate, which must be a high-temperature-resistant rigid substrate material, which greatly limits the ability of TiO 2 Applications on Organic Flexible Substrates

Method used

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  • Low-temperature preparation method of TiO2-based organic/inorganic compound photocatalysis flexible film
  • Low-temperature preparation method of TiO2-based organic/inorganic compound photocatalysis flexible film
  • Low-temperature preparation method of TiO2-based organic/inorganic compound photocatalysis flexible film

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Embodiment 1

[0036] A TiO-based 2 The low-temperature preparation method of the organic / inorganic composite photocatalytic flexible film comprises the following steps:

[0037] 1) Preparation of titanium peroxide solution:

[0038] Take 100ml of TiCl with a concentration of 0.2mol / L 4 Aqueous solution, adjust TiCl with a mass concentration of 5% ammonia water 4 The pH of the aqueous solution is 9, and white orthotitanic acid precipitates are obtained; wash with deionized water until there is no chloride ion in the system; disperse the orthotitanic acid precipitates in 100ml of hydrogen peroxide solution with a mass concentration of 30%, and wait until the precipitation is complete After dissolving, add 0.01g of ferric iron tetroxide as a catalyst, heat at 50°C for 2 hours, remove free oxygen in the system, and centrifuge to obtain a yellow-brown transparent titanium peroxide solution;

[0039] 2) Mixing of polymer emulsion and titanium peroxide solution:

[0040] A certain amount of po...

Embodiment 2

[0046] Repeat Example 1, the only difference is that the polyurethane in the composite material emulsion accounts for 1% by mass of the total solids.

Embodiment 3

[0048] Repeat Example 1, the only difference is that polyurethane accounts for 10% of the total solid mass percent in the composite material emulsion.

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Abstract

The invention discloses a low-temperature preparation method of a TiO2-based organic / inorganic compound photocatalysis flexible film. The method comprises the following steps of: adjusting the pH value of a water solution containing a titanium salt with inorganic alkali; dissolving a regular titanic acid precipitate with hydrogen peroxide to obtain a clear and transparent titanium peroxide solution, heating or adding a catalyst for removing free oxygen from a titanium peroxide solution; mixing the solution with a polymer emulsion to obtain uniformly-mixed compound material emulsion; and forming a film on the surface of an organic flexible substrate, and performing thermal treatment to form a film material with a photocatalysis performance. The TiO2-based organic / inorganic compound photocatalysis flexible film has multiple functions of photocatalysis, antibiosis and super hydrophilicity; and in addition to the formation of a film on the conventional rigid substrate, a very good film forming condition is created particularly on the organic flexible substrate due to the adoption of a low-temperature preparation process, so that the application field of the film is greatly expanded.

Description

technical field [0001] The invention relates to a method for a composite thin film, in particular to a method for preparing an organic / inorganic composite photocatalytic flexible thin film at low temperature on an organic substrate. Background technique [0002] With the deepening and improvement of nanoscience research and technology development, the research on nano-hybrid and nano-composite materials has developed into a very active research field in physics, chemistry, materials science and other disciplines. The research on the functionalization of thin films has always attracted people's attention. [0003] Titanium dioxide (TiO 2 ) is a very stable amphoteric oxide with low cost, no secondary pollution, and stable performance. Catalytic sterilization, self-cleaning and anti-fog and other aspects. [0004] Anatase TiO 2 It has the characteristics of high stability, corrosion resistance, harmless to human body, etc., and is expected to become a material with a wide ...

Claims

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Application Information

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IPC IPC(8): C08J7/04C08J5/18C08L75/04C08L33/04C08K3/22
Inventor 只金芳李豫珍吴良专
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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