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Preparation method of inorganic light-colored conductive titanium dioxide powder

A technology of conductive titanium dioxide and titanium dioxide, which is applied in chemical instruments and methods, inorganic pigment treatment, dyeing low-molecular organic compound treatment, etc., can solve the problems of product agglomeration, equipment corrosion, difficult removal, etc., to reduce production costs and reduce the amount of addition , easy to combine effects

Active Publication Date: 2018-04-13
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method forms ATO / TiO 2 ATO and TiO in Waterborne Polyurethane Thermal Insulation Transparent Coatings with Fillers 2 The uniformity of dispersion, heat insulation, and electrical conductivity need to be further considered
[0007] Chinese invention patent CN103290525B discloses a method for preparing TiO with core-shell structure 2 The method of / ATO nanofiber, on the one hand, what is prepared is fiber structure, has limited its application, and its preparation process is complicated simultaneously; On the other hand, the preparation process of ATO adopts chlorine salt to produce ATO; Chloride (SnCl 2 and SbCl 3 ) In the process of preparing ATO, the chloride ions adsorbed on the surface of the colloidal particles are extremely difficult to remove, which will cause problems such as equipment corrosion, product reunion, long washing cycle, and a large amount of waste water.

Method used

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  • Preparation method of inorganic light-colored conductive titanium dioxide powder
  • Preparation method of inorganic light-colored conductive titanium dioxide powder
  • Preparation method of inorganic light-colored conductive titanium dioxide powder

Examples

Experimental program
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Embodiment 1

[0052] 1. Take 25g of ATO gel (solid content is 28.6%), add 135g of distilled water to dilute, cut with a shear emulsifier for 15min to make it evenly dispersed, add ammonia water (mass fraction of 25%-28%) dropwise under stirring dissolved, the pH was adjusted to 10, and the peptization was allowed to stand, the solution was a transparent colloid, and the ATO hydrosol was obtained.

[0053] 2. Add 49.7 g of titanium dioxide slurry (with a solid content of 50%) without any modification on the surface to the ATO hydrosol to obtain a mixed solution a.

[0054] 3. Emulsify and shear the mixed solution a for 10 minutes, add 1:10 diluted acetic acid dropwise under stirring with a magnetic stirrer until the pH of the mixed solution a is 4, and form a mixed solution b.

[0055] 4. Evaporate the mixed solution b to dryness in a water bath at 90°C, pulverize it into fine particles, calcinate at 500°C for 3 hours, grind it, and measure the volume resistivity of the powder to be 25Ω·cm. ...

Embodiment 2

[0058] 1. Take 20g of ATO gel (solid content is 28.6%), add 108.7g of distilled water to dilute, cut with a shear emulsifier for 15min, add tetraethylenepentamine peptizer dropwise under stirring to adjust the pH to 11.5, and let it stand for peptization. A transparent and clear ATO hydrosol was obtained.

[0059] 2. Add 38.4 g of titanium dioxide slurry (with a solid content of 50%) whose surface is coated with alumina and silicon oxide into the ATO hydrosol to obtain a mixed solution a.

[0060] 3. The mixed solution a was emulsified and sheared for 10 minutes, and dilute nitric acid was added dropwise under magnetic stirring until the pH of the mixed solution was 2.5 to form a mixed solution b.

[0061] 4. Mature the mixed solution b in a 60°C water bath first, then transfer it to a 90°C water bath to evaporate to dryness, pulverize into fine particles, calcinate at 600°C for 1 hour, grind, and measure the volume resistivity of the powder to be 35Ω·cm.

[0062] Such as i...

Embodiment 3

[0064] 1. Take 2.37kg of gel ATO (solid content is 20%), add 8.9kg of distilled water, cut it with a shear emulsifier for 15min, add dropwise ammonia water peptization solution with pH 11 under stirring, let it stand for peptization, after 24h Add 50 mL of ethylenediamine dropwise until the solution is transparent to obtain ATO hydrosol.

[0065] 2. Add 1.6 kg of titanium dioxide slurry (with a solid content of 50%) whose surface is coated with silicon oxide into the ATO hydrosol to obtain a mixed solution a.

[0066] 3. Cut the mixed solution a with a shear emulsifier for 10 minutes, add acetic acid dropwise under mechanical stirring until the pH of the mixed solution is 2, and form a mixed solution b.

[0067] 4. Rotate the mixed solution b in a water bath at 60°C. After about 30 minutes, raise the temperature of the water bath to 90°C, concentrate until the solution can be poured out, transfer it to a vacuum drying oven at 150°C for drying, and crush it into fine particles ...

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Abstract

The invention provides a preparation method of inorganic light-colored conductive titanium dioxide powder. The preparation method includes the steps of firstly, dispersing gel ATO into water to obtaingel ATO aqueous dispersion, and adding a peptizing agent into the gel ATO aqueous dispersion until pH is 8-12 to obtain clear and transparent ATO hydrosol; secondly, adding titanium dioxide slurry into the ATO hydrosol prepared in the first step to form a mixed solution a, wherein the titanium dioxide slurry is prepared by dispersing titanium dioxide into water; thirdly, dropwise adding acid intothe mixed solution a obtained in the second step to regulate pH to 2-6 to form a mixed solution b; fourthly, drying the mixed solution b, crushing, and performing high-temperature sintering to obtainthe inorganic light-colored conductive titanium dioxide powder. The preparation method has the advantages that the method is simple to operate, and the prepared inorganic conductive titanium dioxidepowder is low in resistivity and light in color.

Description

technical field [0001] The invention relates to the field of nanomaterial preparation, in particular to a preparation method of light-colored conductive titanium dioxide powder. Background technique [0002] The scope of application of various metal materials, plastics, fibers, rubber, coatings, etc. is expanding day by day. These materials are prone to static electricity due to friction, collision, etc., and static electricity will generate electrostatic discharge to a certain extent, which may cause breakdown or fire if it is serious; it will also interfere with the radio receiving system, making the radar unable to work normally. In order to prevent or eliminate static electricity, it is necessary to add conductive powder to plastic, rubber, fiber, paint and other products to make it conductive and antistatic. [0003] The types of conductive powder are generally divided into three categories: metal powder (copper powder, silver powder, etc.), carbon powder (carbon black...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/06C09C3/08
CPCC09C1/3661C09C1/3669C09C1/3692C09C3/006C09C3/063C09C3/08
Inventor 张经纬张纪伟任欢欢郭建辉
Owner HENAN UNIVERSITY
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