Method for preparing hypovanadic oxide suspensoid

A technology of vanadium dioxide and suspension, applied in the coating and other directions, can solve the problems of uniformity of dispersion, lack of practical application effect in short time, etc., and achieve the effects of low cost, rheological change and simple operation.

Inactive Publication Date: 2007-03-28
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] But if we can make nano VO 2 To get better application in coatings, we must first solve nano VO 2 The problem of dispersion uniformity in water s

Method used

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  • Method for preparing hypovanadic oxide suspensoid
  • Method for preparing hypovanadic oxide suspensoid

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1

[0023] Weigh 1g nano VO 2 Powder, add 5 drops of wetting agent to wet, then weigh 0.8g (NaPO 3 ) 6 Dissolve with 100g of water to prepare a solution, add the solution to the wetted nano VO 2 In the powder beaker, shear and mix at 5000r / min, adjust the pH to 10 with ammonia water, stir for 2h, and vibrate with ultrasonic for 30min to obtain nano-VO 2 Uniform suspension of powder. The zeta potential is shown in Figure 1 and Figure 2.

Example Embodiment

[0024] Example 2

[0025] Weigh 2g of nano VO2 powder, add 10 drops of wetting agent to wet, then weigh 1.6g (NaPO3)6 and dissolve it with 200g of water to prepare a solution, add the solution to a beaker containing the wetted nano VO2 powder, Shear and mix at 5000r / min, adjust the pH to 9 with ammonia water, stir for 2h, and vibrate with ultrasonic for 30min to obtain a uniform suspension of nano VO2 powder.

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Abstract

The invention relates to VO2 powdery stable suspension with average particle diameter 70nm used (NaPO3)6 as dispersant. Anionic polyelectrolyte makes the VO2 powdery isoelectric point reduce. Ultrasonic dispersion improves the dispersant distribution on particle surface to obviously change the suspension rheological property. It is proved by detecting suspension Zeta electrical potential that the (NaPO3)6 can greatly increase particle surface electric quantity. While pH is 10, the VO2 powdery suspension is stable; the optimum use level of the (NaPO3)6 dispersant is 0.8wt%.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to powder coatings. Background technique [0002] Nanopowder usually refers to tiny solid particles with a particle size of 1-100nm, between microscopic particles and macroscopic objects. Compared with conventional materials, nanopowders show special functions in terms of magnetism, catalysis, light absorption, conductivity, hardness and melting point due to their volume effect and surface effect, and thus have attracted great attention. However, due to the small particle size, large specific surface area and total surface energy of nano-powders, they are easy to agglomerate in solution, and the existence of agglomeration will greatly hinder the full play of the advantages of nano-powders. Therefore, the dispersion and stability of nano-powders are studied. It will be the premise and basis for further improving the performance of materials. According to different dispersion media, the disp...

Claims

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Application Information

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IPC IPC(8): C09D7/12
Inventor 彭子飞徐铸
Owner SHANGHAI NORMAL UNIVERSITY
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