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Nanometer zinc oxide particle preparation method

A nano-zinc oxide and particle technology, which is applied in the direction of zinc oxide/zinc hydroxide, nanotechnology, nanotechnology, etc., can solve the problems of poor dispersion, strict operating conditions, and serious product agglomeration, and achieve high dispersion effect

Inactive Publication Date: 2014-02-05
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods generally have the disadvantages of uneven mixing, high energy consumption, strict operating conditions, complicated process, etc., and the product has serious agglomeration and poor dispersibility.

Method used

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  • Nanometer zinc oxide particle preparation method
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  • Nanometer zinc oxide particle preparation method

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preparation example Construction

[0015] see figure 1 and figure 2 , the invention provides a kind of preparation method of nano zinc oxide particle, this method comprises the following steps:

[0016] (1) An ammonium carbonate solution 112, a zinc salt mixed solution 122, and a film dispersion microreactor 140 are provided, wherein the ammonium carbonate solution 112 is an aqueous solution in which ammonium carbonate is dissolved, and the carbonic acid Ammonium salts are ammonium carbonate or ammonium bicarbonate, the zinc salt mixed solution 122 is an aqueous solution in which zinc salt and a cationic surfactant are dissolved, and the zinc salt is zinc sulfate or zinc nitrate, and the cationic surfactant is present in the The concentration in the zinc salt mixed solution 122 is greater than or equal to 0.01g / L and less than or equal to 2.0g / L;

[0017] (2) Pass the ammonium carbonate salt solution 112 and the zinc salt mixed solution 122 into the membrane dispersion microreactor 140 respectively, and make...

Embodiment 1

[0037] Prepare 2.0 mol / L ammonium bicarbonate solution and zinc sulfate solution, this zinc sulfate solution comprises the triblock copolymer F127 that concentration is the zinc sulfate of 1.0mol / L and 0.8g / L, the ammonium bicarbonate solution that has been prepared and zinc sulfate solution are transported in the film dispersion microreactor 140 by dispersed phase metering pump 116 and continuous phase metering pump 126 from dispersed phase inlet 142 and continuous phase inlet 144 respectively, and the flow velocity of ammonium bicarbonate solution is 30 milliliters / minute, The sulfuric acid of zinc sulfate solution is 20 ml / min. The pressure difference on both sides of the microporous membrane 148 disperses the ammonium bicarbonate solution into the zinc sulfate solution through the microporous membrane 148, so that it is uniformly mixed in the reaction chamber 146 to generate basic zinc carbonate precipitate particles. The zinc precipitated particles flow out with the mixed...

Embodiment 2

[0039] Substantially with embodiment 1, difference is that zinc sulfate solution comprises the CTAB that concentration is the zinc sulfate of 1.0mol / L and 0.2g / L, and the flow velocity that ammonium bicarbonate solution is transported to film dispersion microreactor 140 is 40 milliliters / liter Minutes, the zinc sulfate solution is delivered to the sulfuric acid of film dispersion microreactor 140 at 20 ml / min. The average diameter of the micropores in the microporous membrane 148 is 5 microns. The nano-zinc oxide particle that this embodiment 2 obtains, the specific surface area of ​​this nano-zinc oxide particle is about 82.38 square meters per gram, and the apparent particle diameter is about 9.72 nanometers, and the primary particle diameter with electron projection scanning electron microscope is about 10 nanometers, The primary particle size measured by X-ray diffractometer is about 9 nanometers, and the agglomeration index is 1.080.

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Abstract

The present invention relates to a nanometer zinc oxide particle preparation method, which comprises: providing an ammonium carbonate salt solution, a zinc salt mixing solution and a membrane dispersion micro reactor, wherein the ammonium carbonate salt solution is an aqueous solution dissolved with an ammonium carbonate salt, the ammonium carbonate salt is ammonium carbonate or ammonium bicarbonate, the zinc salt mixing solution is an aqueous solution dissolved with a zinc salt and a cationic surfactant, the zinc salt is zinc sulfate or zinc nitrate, and the cationic surfactant concentration in the zinc salt mixing solution is more than or equal to 0.01 g / L and is less than or equal to 2.0 g / L; respectively introducing the ammonium carbonate salt solution and the zinc salt mixing solution into the membrane dispersion micro reactor, and carrying out a chemical reaction of the ammonium carbonate salt and the zinc salt to produce basic zinc carbonate precipitate particles, wherein a molar ratio of the ammonium carbonate salt to the zinc salt is 1:1-4:1; and drying and calcining the basic zinc carbonate precipitate particles to form the nanometer zinc oxide particles.

Description

technical field [0001] The invention relates to a preparation method of nano zinc oxide particles. Background technique [0002] Due to the large proportion of grain boundary atoms, the surface electronic structure and crystal structure of nano-zinc oxide particles will change, resulting in surface effects, small-scale effects, quantum effects and macroscopic quantum tunneling effects that are different from bulk materials. Due to their good electromechanical coupling properties, magnetic, optical, thermal, chemical, mechanical and catalytic properties, nanoparticles have been widely concerned and researched in the fields of science and industry, as catalytic materials, semiconductor materials, magnetic materials, ceramic materials, photosensitive Materials have broad application prospects in the fields of electronics, metallurgy, biology, chemistry, and medicine. [0003] The size and distribution of nanoparticles are the most important factors affecting their properties. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02B82Y30/00
Inventor 王玉军骆广生王军黄翠农祖荣王凯黄开庆刘俊
Owner TSINGHUA UNIV