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Reversible double-superaffinity film and its preparing process and application

An amphiphilic and reversible technology, applied in the direction of coating, etc., can solve the problems of easy condensation or agglomeration of nanoparticles, low heat treatment temperature, single induction method, etc., and achieve the effect of improving light transmission, uniform dispersion, and avoiding agglomeration

Inactive Publication Date: 2003-11-19
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the purposes of the present invention is to overcome the problems of unstable performance, single induction method, low heat treatment temperature and extremely easy condensation or aggregation of nanoparticles in the superhydrophilic film in the prior art, and provide a method that can be used in multiple induction methods. Exciting, stable, high-temperature processable reversible super-amphiphilic thin film

Method used

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  • Reversible double-superaffinity film and its preparing process and application
  • Reversible double-superaffinity film and its preparing process and application
  • Reversible double-superaffinity film and its preparing process and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) At room temperature, 1.6 mol of tetrabutyl titanate, 0.1 mol of tin tetrachloride, 0.2 mol of zinc chloride, and 0.1 mol of tungsten hexachloride (at this moment, tetrabutyl titanate accounts for 80% of the total metal salt ), joined in the ethanol solvent of 97.3mol, after the metal salt was dispersed evenly with ultrasonic waves, a transparent sol was obtained;

[0055] (2) Add 0.1 mol of stabilizer glycerin to the obtained transparent sol, slowly add 35% of 0.06 mol concentrated hydrochloric acid catalyst dropwise under strong stirring, and continue stirring for about 0.1 hour to generate a mixture containing partially hydrolyzed metal salts;

[0056] (3) aging the above mixture for 3 hours to obtain a transparent sol with evenly dispersed nanoparticles;

[0057] (4) Spin-coat the above-mentioned transparent sol on a glass sheet to make a film, dry it at room temperature, place it in a muffler furnace at 550° C., and keep it warm for 1.5 hours to obtain a transpa...

Embodiment 2

[0062] (1) At room temperature, add 9 mol of tetrabutyl titanate, 0.7 mol of zinc acetate, 0.2 mol of strontium dichloride hexahydrate, and 0.1 mol of ammonium molybdate (at this time, tetrabutyl titanate accounts for 90% of the total metal salt) , was added to 88.1mol of acetone solvent, and the metal salt was uniformly dispersed by ultrasonic waves to obtain a transparent sol;

[0063] (2) Add 1.8 mol of ethylene glycol stabilizer to the obtained transparent sol, slowly add 0.1 mol of acetic acid catalyst dropwise under strong stirring, and continue to stir for about 0.5 hours to generate a mixture containing partially hydrolyzed metal salts;

[0064] (3) aging the above mixture for 4 hours to obtain a transparent sol with evenly dispersed nanoparticles;

[0065] (4) The above-mentioned transparent sol is spin-coated on a glass sheet to form a thin film, and after drying at room temperature, it is placed in a muffler furnace at 600° C. and kept for 0.3 hours to obtain a tran...

Embodiment 3

[0069] (1) At room temperature, add 27.71 mol of tetrabutyl titanate, 2 mol of tin acetate, 1 mol of basic aluminum acetate dihydrate, 0.89 mol of ammonium molybdate, and 1 mol of niobium pentachloride (at this time, tetrabutyl titanate accounts for the total amount of metal salt) 85% of the amount), was added in the ethanol solvent of 60.4mol, and after the metal salt was dispersed uniformly by ultrasonic waves, a transparent sol was obtained;

[0070] (2)) Add 5.4mol of 1,3-propanediol stabilizer to the obtained transparent sol, slowly add 35% of 1.63mol of concentrated hydrochloric acid catalyst dropwise under vigorous stirring, and continue stirring for about 1 hour to form a partially hydrolyzed mixtures of metal salts;

[0071] (3) aging the above mixture for 3.5 hours to obtain a transparent sol with evenly dispersed nanoparticles;

[0072] (4) The above-mentioned transparent sol is spin-coated on a glass sheet to form a film, and after drying at room temperature, it i...

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Abstract

A process for preparing reversible double-superaffinity film includes such steps as adding metal salt (0.5-32 mol) to organic solvent (70-98 mol), ultrasonic dispersing, adding stabilizer (0.1-6 mol) and catalyst (0.01-1.63 mol), preparing transparent sol, coating it on surface of substrate, heating in muffle furnace at 550-720 deg.C for 0.05-1.5 hr to obtain transparent film and external field induction for 10 min-5 hr to obtain the said reversible double-superaffinity film containing nm TiO2 particles (80-98%) and nm metal oxide particles (2-20%). After the external field induction for removing the effect of double-superaffinity, the said film can lose its double-superaffinity.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a reversible super-amphiphilic (super-hydrophilic, super-oleophilic) film and its preparation method and application. Background technique [0002] PCT patent WO9629375A (International Publication Date September 26, 1996) proposes to first synthesize a colloid by adding acid hydrolysis to titanate, and then use this colloid to prepare superhydrophilic TiO excited by ultraviolet light irradiation 2 film. Superhydrophilicity means that the contact angle of water on the solid surface tends to zero. However, the superhydrophilic effect lasts for a short time and its performance is unstable. The superhydrophilic film reported in the literature can only maintain its superhydrophilicity in the dark for more than ten hours after leaving the ultraviolet light source. When the time of storage in the dark is further prolonged, the water...

Claims

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Application Information

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IPC IPC(8): C09D1/00
Inventor 王融蒋峰芝宋延林朱道本江雷
Owner INST OF CHEM CHINESE ACAD OF SCI
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