Inorganic surface treating method for nano-zinc oxide

A nano-zinc oxide and surface treatment technology, applied in the field of nano-materials, can solve problems such as poor inorganic surface treatment effect, and achieve the effects of easy control, good dispersibility, and improved dispersibility

Active Publication Date: 2009-05-13
江苏河海纳米科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the hydrochloric acid, sulfuric acid, acetic acid and ammonia water used in this method wil

Method used

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  • Inorganic surface treating method for nano-zinc oxide
  • Inorganic surface treating method for nano-zinc oxide

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Example 1

[0024] The specific implementation is as follows:

[0025] (1) Take 1000 g of nano zinc oxide aqueous dispersion with a mass percentage of 25%, adjust the temperature of the nano zinc oxide aqueous dispersion to 30°C, and add 100 mass to the nano zinc oxide aqueous dispersion while stirring. 5% aluminum chloride (AlCl 3 ) An aqueous solution and a sodium phosphate aqueous solution with a mass percentage of 3%, and the pH of the system is maintained at 8.0, and the co-current feeding time is 30 minutes. The amount of aluminum chloride to generate AlPO 4 In terms of mass, it accounts for 3% of the mass of nano zinc oxide. After the aluminum chloride aqueous solution is added, continue to stir and mature at 30°C for 120 minutes.

[0026] (2) Raise the temperature of the nano-zinc oxide slurry obtained in step (1) to 95°C, while stirring, add a 30% by mass aqueous solution of sodium silicate to the nano-zinc oxide slurry and the amount of sodium silicate To generate...

Example Embodiment

[0028] Example 2

[0029] The specific implementation is as follows:

[0030] (1) Take 1000 g of nano zinc oxide aqueous dispersion with a mass percentage of 25%, adjust the temperature of the nano zinc oxide aqueous dispersion to 90 ℃, while stirring, add 100 mass to the nano zinc oxide aqueous dispersion. 30% aluminum nitrate (Al(NO 3 ) 3 ·9H 2O) An aqueous solution and a sodium phosphate aqueous solution with a mass percentage of 30%, and the pH of the system is maintained at 10.0, and the co-current feeding time is 300 minutes. The amount of aluminum chloride to generate AlPO 4 In terms of mass, it accounts for 10% of the mass of nano zinc oxide. After the aluminum chloride aqueous solution has been added, continue to stir and mature at 90°C for 20 minutes.

[0031] (2) Lower the temperature of the nano-zinc oxide slurry obtained in step (1) to 75°C, while stirring, add 5% by mass potassium silicate aqueous solution to the nano-zinc oxide slurry, the amount of potassium silica...

Example Embodiment

[0033] Example 3

[0034] The specific implementation is as follows:

[0035] (1) Take 1000g of nano zinc oxide aqueous dispersion with a mass percentage of 25%, adjust the temperature of the nano zinc oxide aqueous dispersion to 50°C, and add 100% by mass to the nano zinc oxide aqueous dispersion while stirring. 20% aluminum sulfate (Al 2 (SO 4 ) 3 ·18H 2 O) An aqueous solution and a sodium phosphate aqueous solution with a mass percentage of 10%, and the pH of the system is maintained at 9.0, and the co-current feeding time is 150 minutes. The amount of aluminum chloride to generate AlPO 4 In terms of mass, it accounts for 5% of the mass of nano zinc oxide. After the aluminum sulfate aqueous solution is added, continue to stir and mature at 50°C for 60 minutes.

[0036] (2) Raise the temperature of the nano-zinc oxide slurry obtained in step (1) to 85°C, while stirring, add a 15% sodium silicate aqueous solution with a mass percentage of sodium silicate to the nano-zinc oxide aq...

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Abstract

The invention relates to a method for processing the inorganic surface of nanometer zinc oxide, and belongs to the field of nanometer materials. The method for processing the inorganic surface of the nanometer zinc oxide comprises the following steps: cladding aluminum phosphate on the surface of the nanometer zinc oxide; then cladding silicon oxide; filtering and washing the paste of the nanometer zinc oxide, so that the electric conductivity of filtrate is less than 300 Mu S/cm; drying the filtrate; and obtaining nanometer zinc oxide composite powder after the filtrate is crushed. The method has short process flow, convenient operation and easy control. The nanometer zinc oxide composite powder prepared has the advantages of excellent light stability, small dissolution rate of zinc ion and good dispersivity.

Description

technical field [0001] The invention relates to an inorganic surface treatment method of nano-zinc oxide, which belongs to the field of nano-materials. Background technique [0002] Nano-zinc oxide is an inorganic ultraviolet shielding agent with excellent performance, which is widely used in sunscreen cosmetics, plastics, rubber, chemical fibers, coatings and other fields. Zinc oxide is an N-type semiconductor. Under ultraviolet irradiation, the electrons in its valence band can absorb ultraviolet rays 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. The hydroxyl radicals on the surface of zinc oxide and the adsorbed water produce hydroxyl radicals, which have a strong oxidizing ability and will oxidize and decompose the surrounding organic matter. Due to the small particle size of nano-zinc oxide, the time for holes and electrons to reach the crystal surface from the inside ...

Claims

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Application Information

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IPC IPC(8): C01G9/02C09C1/04C09C3/06
Inventor 姚超成庆堂徐斌海吴凤芹方志成李为民张磊
Owner 江苏河海纳米科技股份有限公司
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