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Method for preparing nanometer titanium dioxide slurry through cellulose acidification process

A technology of nano-titanium dioxide and titanium dioxide, which is applied in the direction of nanotechnology, photosensitive equipment, and final product manufacturing. strong effect

Active Publication Date: 2012-06-27
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention provides a method for preparing nano-titanium dioxide slurry by acidifying cellulose in order to improve the deficiencies such as high cost and complicated process of the prior art; A new method of titanium dioxide slurry with high output efficiency, environmentally friendly process, and suitable for large-scale industrial production is used to avoid and overcome the low yield and complicated steps of preparing titanium dioxide slurry with nano-titanium dioxide powder. Insufficiencies and shortcomings such as unstable material performance

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  • Method for preparing nanometer titanium dioxide slurry through cellulose acidification process
  • Method for preparing nanometer titanium dioxide slurry through cellulose acidification process

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Experimental program
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Effect test

Embodiment 1

[0017] (1) Acidification treatment: Titanium dioxide powder (average particle size is selected as 10nm) is pretreated, and the titanium dioxide powder is acidified with 70% acetic acid in mass concentration, and the pH of the mixed solution is controlled to be 1. Treat in a water bath at 30°C for 1 hour, and dry the acidified titanium dioxide powder in an oven at 30°C for later use.

[0018] (2) preparation solution, at first in beaker, add acetylacetone solvent, then add methyl cellulose, finally add mass concentration and be 70% acetic acid, be mixed with solvent, according to the mass ratio of each component of solvent: acetic acid: acetylacetone: formaldehyde Base cellulose = 0.007:5:10, stirred on a stirrer for 0.5 hours, heated in a constant temperature water bath at a temperature of 20°C, and prepared a solution for use.

[0019] (3) Add 5 g of the deacidified titanium dioxide powder into 20 g of the solution prepared in step 2, stir the solution with a stirrer at a con...

Embodiment 2

[0023] (1) Acidification treatment: the titanium dioxide powder (average particle diameter 100nm) is pretreated, and the titania powder is acidified with 92% nitric acid to control pH=5. Treat in water at a temperature of 60°C for 10 hours, and dry the acidified titanium dioxide powder in an oven at 60°C for later use.

[0024] (2) preparation solution, at first in beaker, add terpineol secondly and add OP-10 emulsifier, then add ethyl cellulose, finally add the nitric acid that mass concentration is 92%, be mixed with solvent, according to the quality of each component of solvent Ratio: Ethyl cellulose: OP-10 emulsifier: terpineol: nitric acid = 9: 2: 3: 0.007, stir on the stirrer for 2 hours, during which the constant temperature water bath is heated, the temperature is 60 ° C, and the solution is prepared for use .

[0025] (3) Add 1 g of deacidified titanium dioxide powder into 5 g of the solution prepared in step 2, stir the solution with a stirrer at a constant temperat...

Embodiment 3

[0028] (1) Acidification treatment: the titanium dioxide powder (average particle diameter 70nm) is pretreated, and the PH=3 is controlled by using acetic acidified titanium dioxide powder with a mass concentration of 95%. Treat in water at a temperature of 40°C for 5 hours, and dry the acidified titanium dioxide powder in an oven at 40°C for later use.

[0029] (2) preparation solution, at first in beaker, add acetylacetone followed by polyethylene glycol (polymerization degree 2000), then add hydroxypropyl methylcellulose and methylcellulose, finally add the nitric acid that mass concentration is 80%, Prepared into a solvent, according to the mass ratio of the components of the solvent: hydroxypropyl methylcellulose: methylcellulose: polyethylene glycol (polymerization degree 2000): acetylacetone: nitric acid=3:6:3:3:0.005. Stir on the stirrer for 1 hour, during which the constant temperature water bath is heated at 30°C, and the solution is prepared for use.

[0030] (3) A...

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Abstract

The invention provides a method for preparing nanometer titanium dioxide slurry through a cellulose acidification process. Raw materials comprise titanium dioxide powder, acid liquor dispersing agent, surface stabilizer and surfactant. The method comprises the steps of: firstly, using acid liquor to treat the titanium dioxide powder; then dissolving the treated titanium dioxide powder in solution prepared by using the surface stabilizer, the surfactant and the acid liquor dispersing agent; and finally agitating, heating and concentrating to obtain slurry with certain content. The invention aims at providing a new method which has the advantages that the manufacturing method is simple and convenient, the raw materials are easy to obtain, the manufacturing cost is low, the performance is stable, the output efficiency is high, the process is environmental-friendly, and the method is suitable for the large-scale industrial production of titanium dioxide slurry and is used for avoiding and overcoming the defects that the yield is low, the steps are complex, the performance of the prepared slurry is unstable and the like when the existing method is used for preparing the titanium dioxide slurry by using nanometer titanium dioxide powder.

Description

Technical field: [0001] The invention relates to a method for preparing nano-titanium dioxide slurry; in particular, it relates to a method for preparing nano-titanium dioxide slurry by acidifying cellulose. Background technique: [0002] Titanium dioxide is an important raw material for the preparation of inorganic materials, and its particle size is between 1-100nm. Nano-titanium dioxide has special properties shared by many nanomaterials produced by its own scale reaching the nanometer level, such as: large specific surface area and high surface energy. , The proportion of surface atoms is large. And its unique three major effects: surface effect, small size effect and macroscopic quantum tunneling effect. Macroscopically, it shows special optical properties, thermal properties, magnetic properties, and mechanical properties. Due to its special properties, nano-titanium dioxide plays a major role in electron transfer in the manufacture of new-generation solar energy suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042H01G9/20H01M14/00H01L31/0224H01L51/44B82Y40/00
CPCY02E10/549Y02P70/50
Inventor 暴宁钟查晨阳邵绍峰何大方高凌吉成
Owner NANJING UNIV OF TECH
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