Method for preparing nanometer ATO dispersing slurry fast, efficiently and cheaply

A nano-dispersion, ATO technology, used in polyurea/polyurethane coatings, dyeing physical treatment, fibrous fillers, etc., can solve the problems of low efficiency, power consumption, poor slurry dispersion effect, etc., to achieve low cost, improve efficiency, The effect of good stability

Inactive Publication Date: 2011-01-19
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is to overcome defects such as time-consuming, power consumption, inefficiency, and poor dispersion effect (i.e. particle size) of the obtained slurry when producing ATO nano-slurry by existing ball milling technology, and to provide a fast and power-saving , A new method for efficiently producing ATO nanoslurry with good dispersion effect

Method used

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  • Method for preparing nanometer ATO dispersing slurry fast, efficiently and cheaply
  • Method for preparing nanometer ATO dispersing slurry fast, efficiently and cheaply
  • Method for preparing nanometer ATO dispersing slurry fast, efficiently and cheaply

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Measure 490 mL of distilled water, add 2.1 mL of KH570 while stirring, then add 210 g of ATO powder (produced by Shanghai Huzheng Nano Co., Ltd.), and adjust the pH value of the slurry to 10 with NaOH solution (1.0 mol / L). After fully stirring, add it into a stainless steel ball mill tank with a volume of 3L (select 2100g of zirconium beads with a diameter of 1.0mm, and its volume is about twice the volume of the ATO powder), and adjust the total mass of the corresponding two tanks to be equal. Ball mill on a domestic planetary ball mill (QM-2SP12) with a rotation rate of 380rpm. After 7.5 hours, the slurry was taken out to adjust the pH value to 8.0, and then centrifuged at 4000r / min for 40 minutes, the solid content still reached more than 27%, and it was placed stably for half a year without obvious settlement. Particle size and distribution see figure 1 , confirmed to have reached the nanoscale dispersion.

Embodiment 2

[0042] The formula and other processes of ball milling are the same as in Example 1, but the zirconium beads are replaced with those with a diameter of 0.2 mm, and the time is shortened to 5 hours. The obtained slurry has a solid content of more than 27%, and can be placed stably for half a year without obvious settlement. Its particle size and distribution are shown in figure 2 , confirmed to have reached the nanoscale dispersion.

Embodiment 3

[0044] Other formulations and ball milling process are the same as in Example 1, but the dispersant KH570 is replaced by KH560, the dosage is equivalent to 1.8% of ATO mass, and the time is shortened to 6h. The obtained slurry has a solid content of more than 27%, and can be placed stably for half a year without obvious settlement. Its particle size and distribution are shown in image 3 , confirmed to have reached the nanoscale dispersion.

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Abstract

The invention discloses a method for preparing nanometer ATO dispersing slurry fast, efficiently and cheaply. The method comprises the following steps: (1) successively adding silane coupling agent and ATO powder in water under stirring according to a weight ratio of to 0.005-0.02:1 to obtain ATO powder suspending liquid with the solid content of 16-55%, adjusting the pH value with alkaline solution to 9-11; (2) placing the ATO powder suspending liquid obtained by the step (1) in a ball mill to perform ball milling for 0.5-7.5 hours which adopts zirconium beads as ball-milling beads, removing the ball-milling beads to obtain slurry, fast adjusting the pH value with alkaline solution to 6-8; and (3) centrifuging the slurry obtained by the step (2) in a centrifugal machine under the rotate speed of 1000-4000rpm to obtain the nanometer ATO dispersing slurry. The preparation method of the invention is characterized by fast speed, electricity-saving and high efficiency; the average diameter of the particles of the prepared slurry is 25-50nm, the solid content is 15-50%, and the dispersing effect is very good.

Description

(1) Technical field [0001] The invention relates to a method for preparing ATO nanometer dispersion slurry. (2) Background technology [0002] Building energy conservation is the basic energy utilization policy that our province has always adhered to. Among all kinds of energy consumption, building heating and air conditioning energy consumption occupies a considerable proportion. Doors and windows, as transparent and openable envelopes in house construction, are the weakest part of winter heat preservation and summer heat insulation. When we turn on the air conditioner to heat or cool down, the energy lost from ordinary single-layer glass windows is as high as 50% of the building's energy consumption. Today, building energy conservation is being promoted in an all-round way. After the thermal insulation performance of the wall has been greatly improved, Doing a good job of thermal insulation of doors and windows, especially the glass that accounts for 80% of the area of ​...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C09C3/12C09C3/04C09D7/12C09D175/04
Inventor 冯杰钟明强董绍春
Owner ZHEJIANG UNIV OF TECH
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