Nanometer titanium dioxide water pulp and its preparation method

A technology of nano-titanium dioxide and water-based slurry, which is applied in the direction of titanium oxide/hydroxide, etc., can solve the problems of poor dispersion stability and achieve the effect of wide application

Inactive Publication Date: 2006-09-13
SHANGHAI HUAMING HI TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is to disclose a nano-titanium dioxide aqueous slurry and its preparation method, so as to overcome the shortcomings of poor dispersion stability of nano-titanium dioxide slurry in previous methods and meet the needs of development in related fields

Method used

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  • Nanometer titanium dioxide water pulp and its preparation method
  • Nanometer titanium dioxide water pulp and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Get commercially available anatase type nano-titanium dioxide (primary crystal grain average size is 20nm) 170g, put into 250g tap water, add the tensio-active agent CH-2B of 8.5g, add the sodium hydroxide solution that weight concentration is 30% to adjust Solution pH to 8.0, add 0.5g of HX-5010 water-based defoamer, add 15g of propylene glycol. Use a high-speed disperser to disperse (3000rpm) and disperse for 5 minutes, put the obtained pre-dispersed slurry with a solid content of titanium dioxide of 21.4% into a sand mill for 45 minutes (the diameter of the sanding disc is 40mm, and the rotation speed is 4000rpm). Add 250g of water and 0.5g of HX-5010 defoamer, and add 30% sodium hydroxide solution to adjust the pH of the solution to 8.0, and disperse at high speed for 5 minutes. Sanding again for 5 minutes, the nano-titanium dioxide water-based slurry of the present invention was obtained. Qualitative and quantitative methods were used to analyze and test, and the ...

Embodiment 2

[0049] Get 110kg of commercially available anatase nano-titanium dioxide (primary grain average size is 20nm), put into 250kg of water, add 19kg of acrylic acid copolymer coating agent, add the ammoniacal solution of weight concentration 20% to adjust the pH of the solution to 10.0, add 0.9kg of HX-5030 defoamer, add 18kg of propylene glycol. Disperse (1000rpm) with a high-speed disperser for 15 minutes, and the obtained titanium dioxide solid content is 26.9% of the pre-dispersed slurry with a flow rate of 5L / min into a 30L horizontal sand mill for sand grinding (equivalent to a grinding residence time of 6min) to complete First grind. Add 250kg of water, 0.9g of HX-5030 defoamer, add 20% ammonia solution by weight, adjust the pH of the solution to 10, and disperse at high speed for 5 minutes. Re-introduce the sand mill with a flow rate of 10 L / min (equivalent to a grinding time of 3 min) to complete the second grinding to obtain the nano-titanium dioxide aqueous slurry of t...

Embodiment 3

[0052] Get 210g of commercially available anatase nano-titanium dioxide (the average size of the original grain is 20nm), put it into 250g of tap water, add 10.5g of surface coating agent CH-18C, add 15g of propylene glycol and 0.5g of HX-5010 Water-based defoamer, adding 20% ​​ammonia solution by weight to adjust the pH of the solution to 7.0. Disperse (3000rpm) with a high-speed disperser for 5 minutes, and then put the obtained pre-dispersed slurry with a solid content of titanium dioxide of 42.4% into a sand mill for 45 minutes (diameter of the sand grinding disc 40mm, rotating speed 4000rpm). Add 180g of water and 0.4g of HX-5010 water-based defoamer, and add 20% ammonia solution to adjust the pH of the solution to 7.0, and disperse at high speed for 10 minutes. Sanding again for 5 minutes, the nano-titanium dioxide water-based slurry of the present invention was obtained. Qualitative and quantitative methods were used to analyze and test, and the test data are shown in ...

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Abstract

An aquatic slurry of nano-TiO2 features its durable stability and dispersity without layering and depositing. Its preparing process features that the high-powder shearing-grinding apparatus is used to decoagulate the sintered TiO2 nanoparticles to become separated TiO2 nanoparticles, the proper molecular function groups and the surface covering agent are added for binding them with the acidic surface of TiO2, and the sterical hindering action and elestrostatic repelling action can make said TiO2 nanoparticles be dispersed in water-phase system stably.

Description

technical field [0001] The invention relates to a nano titanium dioxide slurry and a preparation method thereof. Background technique [0002] Due to the nano-effect of titanium dioxide powder with a particle size of 5-20nm, in addition to the general colloidal effect, it has been found so far to have: photoelectric conversion, ultraviolet absorption and shielding, catalysis, and efficient and rapid broad-spectrum antibacterial effect. And can be used in many fields, such as: sewage treatment, using the photocatalytic reaction of nano-titanium dioxide to decompose organic matter; used in cosmetics, it is an ideal anti-ultraviolet skin care material; used for antibacterial, against Escherichia coli, staphylococcus, white Candida has a strong ability to kill; in the textile industry and paint industry, nano-titanium dioxide as a new type of additive will play its above-mentioned functions. In the field of textile sizing, nano-titanium dioxide can replace or partially replace ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/04
Inventor 马新胜李福清吴秋芳陈国建陈刚蔡梦军
Owner SHANGHAI HUAMING HI TECH GRP
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