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Surface modified nano zinc oxide water dispersion and its preparing method and use

A nano-zinc oxide, surface modification technology, applied in chemical instruments and methods, pharmaceutical formulations, rayon manufacturing, etc., can solve problems such as easy agglomeration, and achieve stable dispersion, easy operation, and good reproducibility.

Inactive Publication Date: 2004-07-14
BEIJING INST OF CLOTHING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, due to the reduction in the size of nano-ZnO particles, the ratio of the number of surface atoms of the particles to the total number of atoms increases significantly, and the surface energy and surface tension of the particles also increase. Different from internal atoms, there are many dangling bonds and unsaturated properties, so it is very easy to combine with other atoms and tend to be stable. Therefore, nano-zinc oxide particles have high chemical activity, which leads to their production and production. Very easy to agglomerate in application, especially in liquid phase

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. Put 1g of nanometer zinc oxide, 0.2g of sodium phosphate and 6ml of water into a 50ml beaker, raise the temperature to 60°C, and ultrasonically vibrate for 2 hours to fully disperse the nanometer zinc oxide. Then 1 g of sodium silicate and 10 ml of water were added. Use hydrochloric acid (1%) to adjust the pH value between 7 and 8, then add water to a total volume of 25ml, ultrasonically oscillate for 1 hour, centrifuge for 1 hour, and remove the supernatant to obtain hydrated SiO 2 Surface modified nano zinc oxide.

[0038] 2. To the hydrated SiO obtained in the above step 1 2 Add water to the surface-modified nano-zinc oxide to a total volume of 25ml, add 0.5ml of γ-aminopropyltriethoxysilane and 1ml of absolute ethanol, and after ultrasonic vibration for 50 minutes, further add 6ml of 17wt% polymethyl acrylate emulsion , after ultrasonic oscillation for 30 minutes, the hydrated SiO 2 Aqueous dispersion of surface-modified zinc oxide nanoparticles.

[0039] The...

Embodiment 2

[0041] 1. Put 1g of nanometer zinc oxide, 0.2g of sodium phosphate and 6ml of water into a 50ml beaker, raise the temperature to 60°C, and ultrasonically vibrate for 2 hours to fully disperse the nanometer zinc oxide. Then 5 g of potassium aluminum sulfate and 10 ml of water were added. Use hydrochloric acid (1%) to adjust the pH value between 5.5 and 6.0, then add water to a total volume of 25ml, ultrasonically oscillate for 1 hour, centrifuge for 1 hour, and remove the supernatant to obtain Al hydrate 2 o 3 Surface modified nano zinc oxide.

[0042] 2. To the hydrated Al obtained in the above step 1 2 o 3 Add water to the surface-modified nano-zinc oxide to a total volume of 25ml, 0.5ml of γ-aminopropyltriethoxysilane and 1ml of absolute ethanol, and after ultrasonic vibration for 50 minutes, add 6ml of 17wt% polymethyl acrylate emulsion, and ultrasonically After shaking for 30 minutes, hydrated Al 2 o 3 Aqueous dispersion of surface-modified zinc oxide nanoparticles. ...

Embodiment 3

[0045] 1. Put 1g of nano-zinc oxide, 0.2g of sodium phosphate and 6ml of water into a 50ml beaker, raise the temperature to 60°C, and ultrasonically oscillate for 2 hours to fully disperse the nano-zinc oxide, then add 0.8g of ferric chloride and 10ml of water . Use ammonia water (1%) to adjust the pH value between 12 and 13 (the color of the dispersion gradually turns brownish yellow), then add water to a total volume of 25 ml, and oscillate ultrasonically for 1 hour. After centrifugation for 1 hour, after removal of the supernatant, hydrated Fe was obtained 2 o 3 Surface modified nano zinc oxide.

[0046] 2. to the hydrated Fe obtained in the above step 1 2 o 3 Add water to the surface-modified nano-zinc oxide to a total volume of 25ml, add silane coupling agent γ-aminopropyltriethoxysilane 0.5ml and absolute ethanol 1ml, after ultrasonic vibration for 50 minutes, add 17wt% polymethyl acrylate Ester emulsion 6ml, after ultrasonic vibration for 30 minutes, the hydrated F...

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Abstract

The present invention belongs to the field of inorganic material, and is especially surface modified nano zinc oxide water dispersion and its preparation process and use. The water dispersion consists of: nano zinc oxide 0.1-10 wt%; hydrated SiO2 0.06-10 wt%, hydrated Al2O3 0.12-20 wt% or hydrated Fe2O3 0.05-10 wt%; silane coupling agent 0.1-10 wt%; and water soluble polymer 0.2-9 wt% other than water. The water dispersion is prepared through depositing hydrated SiO2, hydrated Al2O3 or hydrated Fe2O3 onto the surface of zinc oxide, and subsequent homogeneous mixing with silane coupling agent, water soluble polymer and water. The zinc oxide inside the water dispersion is dispersed homogeneously and stably without aggregation, and the water dispersion of the present invention may be used in preparing uvioresistant fabric.

Description

technical field [0001] The invention belongs to the field of inorganic materials, and in particular relates to a surface-modified nano-zinc oxide aqueous dispersion and a preparation method and application thereof. Background technique [0002] Nano-zinc oxide is a multifunctional material that has been widely used in piezoelectric ceramics, pigments, petrochemical catalysts, sensitive materials or fine chemicals. The basis of the application of such materials lies in their unique physical properties, such as spectral properties, energy band properties, etc. of materials. When the size of the material reaches the nanometer level, its physical properties are quite different from ordinary materials due to important structural properties such as quantum confinement effect, size effect, and surface effect. [0003] The use of nano-zinc oxide is becoming more and more extensive: [0004] Application in cosmetics - as a new type of sunscreen and antibacte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C4/00C08K3/22C09C1/04C09C3/00D01F1/10D06M11/44
Inventor 张涑戎郭云亮李立平
Owner BEIJING INST OF CLOTHING TECH
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