Nano titanium oxide inorganic surface treatment method

A nano-titanium dioxide, surface treatment technology, applied in inorganic pigment treatment, chemical instruments and methods, fibrous fillers, etc., to achieve the effect of reducing agglomeration, avoiding flocculation, and good light stability

Active Publication Date: 2008-09-03
江苏河海纳米科技股份有限公司 +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of nano-titanium dioxide inorganic surface treatment method, this method overcomes the shortcoming that exists in the existing method, solves the existing

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[0021] Example 1

[0022]Add 0.4 kg of sodium hexametaphosphate to 210 kg of deionized water as a dispersant. When the sodium hexametaphosphate is dissolved, add 80 kg of rutile-type nano-titanium dioxide (average particle size of 30 nanometers) to prepare a nano-titanium dioxide slurry. The pH of the slurry was adjusted to 9.5 with an aqueous sodium oxide solution. The obtained nano-titania slurry was placed in dispersing device 1 (PM-PMC270 sand mill), and zirconia balls with a diameter of 0.8-1.0 mm were used as grinding media to grind and disperse for 120 min to obtain nano-titania water dispersion. The nano-titanium dioxide aqueous dispersion enters the 2000-liter inorganic surface treatment reactor 7 through the control valve V1, and deionized water is added to dilute to a solid content of 12%. Turn on the mechanical stirring device 6 and the ultrasonic dispersing device 5 so that the nano-titanium dioxide in the reactor is in a good dispersion state. The heating syste...

Example Embodiment

[0023] Example 2

[0024] Add 0.6 kg of sodium hexametaphosphate to 210 kg of deionized water as a dispersant. When the sodium hexametaphosphate is dissolved, add 60 kg of anatase type nano-titanium dioxide (average particle size of 10 nanometers) to prepare a nano-titanium dioxide slurry. The pH of the slurry was adjusted to 9.0 with aqueous sodium hydroxide. The obtained nano-titania slurry was placed in dispersing device 1 (PM-PMC270 sand mill), and zirconia balls with a diameter of 0.8-1.0 mm were used as grinding media to grind and disperse for 120 min to obtain nano-titania water dispersion. The nano-titanium dioxide aqueous dispersion enters the 2000-liter inorganic surface treatment reactor 7 through the control valve V1, and deionized water is added to dilute to a solid content of 4%. Turn on the mechanical stirring device 6 and the ultrasonic dispersing device 5 so that the nano-titanium dioxide in the reactor is in a good dispersion state. The heating system was t...

Example Embodiment

[0025] Example 3

[0026] Add 0.72 kg of sodium hexametaphosphate to 210 kg of deionized water as a dispersant. After the sodium hexametaphosphate is dissolved, add 72 kg of rutile-type nano-titanium dioxide (average particle size: 15 nm) to prepare a nano-titanium dioxide slurry. Aqueous sodium oxide was used to adjust the pH of the slurry to 9.0. The obtained nano-titania slurry was placed in dispersing device 1 (PM-PMC270 sand mill), and zirconia balls with a diameter of 0.8-1.0 mm were used as grinding media to grind and disperse for 120 min to obtain nano-titania water dispersion. The nano-titanium dioxide aqueous dispersion enters the 2000-liter inorganic surface treatment reactor 7 through the control valve V1, and deionized water is added to dilute to a solid content of 6%. Turn on the mechanical stirring device 6 and the ultrasonic dispersing device 5 so that the nano-titanium dioxide in the reactor is in a good dispersion state. The heating system was turned on to ...

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Abstract

The invention discloses a nm titanium dioxide inorganic surface treating method. The inorganic surface treating is performed when the nm titanium dioxide is in good dispersed state and the inorganic surface treatment effect is increased using the said method. The invention solves the flocculation and dispersion problem of nm titanium dioxide using ultrasonic field, mechanical agitation and film separation and phase integrating. During the process of treating the inorganic surface, on the one hand the nm titanium dioxide dispersion liquid is always under the action of mechanical agitation and ultrasonic, on the other hand, the impurity ions are continuously removed using membrane separation device, so as to make sure the inorganic surface coating reaction under the full dispersed state of the nm titanium dioxide.

Description

technical field [0001] The invention relates to a powder inorganic surface treatment method, in particular to a nano titanium dioxide inorganic surface treatment method. Background technique [0002] Nano-titanium dioxide is a new type of inorganic functional material, which is widely used in the fields of shielding ultraviolet rays, color-dependent coatings, photoelectric conversion, and photocatalysis. Titanium dioxide is an N-type semiconductor. When ultraviolet light with a wavelength of less than 400nm irradiates titanium dioxide, electrons in the valence band can absorb ultraviolet light and be excited to the conduction band, and at the same time generate electron-hole pairs, and some electron-hole pairs will migrate. to the surface, resulting in hydroxyl radicals and adsorbed water on the surface of titanium dioxide to generate hydroxyl radicals, which have a strong oxidizing ability and will oxidize and decompose the organic matter around them. Due to the small part...

Claims

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Application Information

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IPC IPC(8): C09C3/06C09C1/36
Inventor 姚超成庆堂徐斌海吴凤芹李为民王茂华
Owner 江苏河海纳米科技股份有限公司
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