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Method for preparing nano zinc oxide by hydro thermal method

A technology of nano-zinc oxide and hydrothermal method, which is applied in the direction of zinc oxide/zinc hydroxide, nanotechnology, nanotechnology, etc., can solve problems that do not involve nano-zinc oxide, and achieve the effect of convenient and stable storage

Inactive Publication Date: 2009-12-02
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned preparation process often requires the use of high-pressure equipment, and does not involve the use of polycarboxylate as a stabilizer to prepare nano-zinc oxide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: Dihydrate zinc acetate, ammonia water, sodium polyacrylate (viscosity average molecular weight is 5.7×10 3 ) And water are prepared into a solution, wherein, based on the weight percentage of the entire solution, zinc acetate dihydrate accounts for 1.00 wt%, ammonia water accounts for 2.60 wt%, and sodium polyacrylate accounts for 1.50 wt%. Then, the prepared solution is reacted under normal pressure at a temperature of 100-120° C. for 15 hours to obtain nano zinc oxide / sodium polyacrylate composite particles with an average particle diameter of 442 nm, wherein the nano zinc oxide particles have a particle size of 2 to 3 nm.

Embodiment 2

[0012] Example 2: Referring to Example 1, the mass percentage of sodium polyacrylate was changed to 1.75% by weight to obtain nano zinc oxide / sodium polyacrylate composite particles with an average particle size of 151 nm, and the particle size of the nano zinc oxide particles was 2 to 3 nm.

Embodiment 3

[0013] Example 3: Referring to Example 1, the mass percentage of sodium polyacrylate salt is changed to 2.00wt% to obtain nano zinc oxide / sodium polyacrylate composite particles with an average particle size of 92 nm, wherein the particle size of the nano zinc oxide particles is 2 to 3 nm .

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Abstract

The invention discloses a method for preparing nano zinc oxide by hydro thermal method. The main content uses zinc salt and aqueous ammonia as raw material, polyacrylate as dispersion control agent and water as solvent to obtain zinc oxide / polyacrylate composite nano grains which have average grain diameter ranging from 87 nano to 460 nano, and can be dispersed in aqueous solution, wherein nano zinc oxide grains with grain diameter being 2-5 nano are enclosed by polyacrylate molecular chain. The invention is characterized in that the technique is simple, the preparation cost is low, and the zinc oxide grains have small grain diameter and good uniformity and can be dispersed in aqueous solution stably in the form of composite grains.

Description

Technical field [0001] The present invention relates to a method for preparing nano zinc oxide, in particular, adopting a hydrothermal method under normal pressure and using polyacrylate as a dispersion control agent to prepare an average particle diameter between 87 and 460 nanometers, which can be stably dispersed in an aqueous solution The zinc oxide / polyacrylate composite nano-particles in, the particle size of the nano-zinc oxide particles is between 2-5 nanometers, and they are wrapped by polyacrylate molecular chains. Background technique [0002] Nano-zinc oxide has low cost, certain electrical and thermal conductivity, good chemical stability and UV absorption performance, wide gap (3.37eV), high exciton binding energy (60meV), low threshold voltage and luminescence. An important new type of semiconductor material is widely used in medicine, textile, chemical, electronics and other industries. Compared with traditional zinc oxide, nano-zinc oxide has a larger specific su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02B82B3/00
Inventor 赵京波肖鑫杨万泰
Owner BEIJING UNIV OF CHEM TECH
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