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Preparation method of nanometer zinc oxide composite dispersion liquid

A technology of nano-zinc oxide and nano-zinc oxide powder, which is applied in the field of nanotechnology and fine chemical industry, and can solve problems such as inability to form a stable suspension, unsatisfactory dispersion effect, demulsification of dispersion liquid, delamination and even solid agglomeration

Inactive Publication Date: 2014-04-02
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the various surface modification and dispersion technologies currently used are not mature, and the dispersion effect that can be achieved is not ideal.
Especially when dispersed in an aqueous medium, the zinc oxide nanoparticles cannot be dispersed stably and uniformly in the aqueous medium, and thus cannot form a stable suspension; the dispersion of nano-zinc oxide is prone to demulsification, separation, layer or even solid agglomeration; instead of using some nano-zinc oxide dispersions, it is better to use nano-zinc oxide powder directly
Certain nano-zinc oxide dispersions can indeed achieve a better dispersion effect, but some toxic, harmful or environmentally unfriendly additives are added to limit their scope of use; or some more expensive additives are added , resulting in high cost of the entire product and weak market competitiveness; or the technical means are relatively cumbersome, and can only be limited to small-scale preparations at the laboratory level, and cannot achieve industrialized mass production

Method used

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  • Preparation method of nanometer zinc oxide composite dispersion liquid
  • Preparation method of nanometer zinc oxide composite dispersion liquid
  • Preparation method of nanometer zinc oxide composite dispersion liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Based on 1 kg of the nano-zinc oxide composite dispersion liquid, a dispersion liquid with a zinc oxide content of 10% is prepared. The particle size of the nano-zinc oxide powder used is about 30 nanometers. The raw materials and proportioning ratio are shown in the following table:

[0025]

[0026] Preparation method: Before preparation, prepare carbomer into a 1% solution for later use. During preparation, in container A, mix stearic acid and Tween-80 according to the addition amount in the table, heat to 80 degrees, stir while heating, make it fully melt, and form a uniform and transparent liquid state; at the same time, in In container B, add carbomer (1%) and sodium lauryl sulfate to water, stir to form a uniform solution, then add nano-zinc oxide powder, heat to 70 degrees, and stir while heating to form a well-dispersed Slurry; then, under rapid stirring, add phase A at 80 degrees to phase B at 70 degrees, then use a high-speed homogenizer to homogenize for ...

Embodiment 2

[0029] Based on 1 kg of the nano-zinc oxide composite dispersion liquid, a dispersion liquid with a zinc oxide content of 15% is prepared. The particle size of the nano-zinc oxide powder used is about 30 nanometers. The raw materials and the proportioning ratio are shown in the following table:

[0030]

[0031] Preparation method: Before preparation, prepare carbomer into a 1% solution for later use. During preparation, in container A, mix stearic acid and Tween-80 according to the addition amount in the table, heat to 80 degrees, stir while heating, make it fully melt, and form a uniform and transparent liquid state; at the same time, in In container B, add carbomer (1%) and sodium lauryl sulfate to water, stir to form a uniform solution, then add nano-zinc oxide powder, heat to 80 degrees, stir while heating, and form a well-dispersed Slurry; then under rapid stirring, add phase A at 80 degrees to phase B at 80 degrees, then use a high-speed homogenizer to homogenize for...

Embodiment 3

[0034] Based on 1 kg of the nano-zinc oxide composite dispersion liquid, a dispersion liquid with a zinc oxide content of 20% is prepared. The particle size of the nano-zinc oxide powder used is about 30 nanometers. The raw materials and proportioning ratio are shown in the following table:

[0035]

[0036]Preparation method: Before preparation, prepare carbomer into a 1% solution for later use. During preparation, in container A, mix stearic acid and Tween-80 according to the addition amount in the table, heat to 90 degrees, stir while heating, make it fully melt, and form a uniform and transparent liquid; at the same time, in In container B, add carbomer (1%) and sodium lauryl sulfate to water, stir to form a uniform solution, then add nano-zinc oxide powder, heat to 80 degrees, and stir while heating to form a well-dispersed Slurry; then, under rapid stirring, add phase A at 90 degrees to phase B at 80 degrees, then use a high-speed homogenizer to homogenize for 4 minut...

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Abstract

The invention discloses a preparation method of a nanometer zinc oxide composite dispersion liquid. The method is characterized by comprising the following steps: mixing an oil phase component and an emulsifier according to certain proportion in an oil phase system; adding a dispersion stabilizing agent, a surfactant and a nano zinc oxide powder according to a certain ratio into water in a water dispersion system; and respectively uniformly mixing the two phases and heating to a certain temperature, rapidly stirring the two phases for homogeneous mixing, and cooling to room temperature to form a stable emulsion dispersion system. The nanometer zinc oxide composite dispersion liquid prepared by the above method, the particle size difference of zinc oxide particle and nano zinc oxide powder raw material is within 20%; in the dispersion liquid, nano zinc oxide particles are suspended in the liquid in a monodispersed form; and placing for more than 60 days, the nano zinc oxide composite dispersion liquid does not generate the phenomena of layering, demulsification or caking. Moreover, the preparation method has the advantages of simple operation, wide adjustable range of parameters, low energy consumption and short cycle, and is suitable for pilot plant test amplification and industrial large-scale production.

Description

Technical field [0001] The invention relates to a method for preparing a nano zinc oxide composite dispersion and belongs to the fields of nanotechnology and fine chemicals. Background technique [0002] Nano zinc oxide is a multifunctional new inorganic material with a particle size of approximately 1 to 100 nanometers. The outstanding feature of nanoscale zinc oxide is that the product particles are nanoscale and have the dual characteristics of nanomaterials and traditional zinc oxide. Due to the miniaturization of crystal grains, its surface electronic structure and crystal structure change, resulting in surface effects, volume effects, quantum size effects, macro tunnel effects, high transparency, high dispersion and other characteristics that macroscopic objects do not have. [0003] Compared with traditional zinc oxide products, it has a large specific surface area and high chemical activity. The product fineness, chemical purity and particle shape can be adjusted as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02B82Y30/00
Inventor 赵斌刘思俊徐少洪陈超刘光武何丹农
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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