Waterborne low surface tension high viscosity radioactive aerosol suppressant and preparation method

A technology with low surface tension and radioactivity, which is applied in the field of nuclear pollution decontamination, can solve the problems of compression preparations that need to be improved, low surface tension, and large surface tension of droplets, etc. The effect of peel strength

Active Publication Date: 2019-09-17
SOUTHWEAT UNIV OF SCI & TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the use of water as the spray liquid has the following two disadvantages: first, the surface tension of the droplets after water atomization is large, which hinders the wetting and condensation of water mist particles and aerosol particles, reducing the removal effect; After dedusting, the water is difficult to collect due to its good fluidity, and it is easy to seep into the ground after entraining radioactive aerosol particles, causing deeper pollution
[0007] (1) In the prior art, the polymer chain structure is not designed so that the droplets have lower surface tension (surface energy) after atomization of the aqueous solution, and it is easier to wet and condense with the aerosol particles, resulting in the inability to obtain Better aerosol suppression
[0008] (2) In the prior art, it is not possible to make the prepared compressed preparation have a high viscosity while maintaining a low surface tension, resulting in a large fluidity after spraying, atomizing and dust removal, and it is not easy to collect, and cannot effectively solve the problem of radioactivity. diffuse pollution
[0009] (3) The higher surface tension of the existing compressed preparations will cause the diameter of the atomized droplets to be larger, which is equivalent to a small density of atomized droplets per unit volume, thereby reducing the collision frequency between droplets and aerosol dust, make the compression efficiency low
[0014] The control and removal of radioactive dust has always been an important issue in the decommissioning of nuclear facilities and nuclear emergency response. At present, the conventional and flexible method is mainly spray wet pressing decontamination, but the pressing performance of the pressing agent used needs to be improved.

Method used

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  • Waterborne low surface tension high viscosity radioactive aerosol suppressant and preparation method
  • Waterborne low surface tension high viscosity radioactive aerosol suppressant and preparation method
  • Waterborne low surface tension high viscosity radioactive aerosol suppressant and preparation method

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preparation example Construction

[0034] Such as figure 1 As shown, the preparation method of the water-based low-surface tension high-viscosity radioactive aerosol press preparation of the embodiment of the present invention is based on 50 parts of the mass of the synthesized component 1 or component 2, and specifically includes the following steps:

[0035] S101: Add acrylamide and deionized water into the beaker, stir at room temperature to dissolve the acrylamide, then add polymer emulsifier, heat in a water bath at 25°C and stir to fully dissolve, then slowly add styrene, at 40°C Stir and pre-emulsify for 2h to obtain a colorless transparent liquid. Deionized water dosage: 31.55 parts. Acrylamide dosage: 9 parts. The amount of polymer emulsifier: 9 parts. Styrene dosage: 0.45 parts.

[0036] S102: Add deionized water, acrylic acid and sodium hydroxide into the beaker, stir at room temperature to fully dissolve. A colorless transparent liquid was obtained. Deionized water dosage: 49.15 parts. Acryli...

Embodiment 1

[0044] Polymer emulsifier synthesis, including:

[0045] Preparation of component 3 solution: Add 9g of acrylamide and 31.55g of deionized water into a 100ml beaker, stir at room temperature to dissolve the acrylamide, then add 9g of sodium lauryl sulfate, heat in a water bath at 25°C and stir to fully Dissolve, then slowly add 0.45g styrene, stir and pre-emulsify at 40°C for 2h to obtain a colorless transparent liquid.

[0046] Preparation of component 4 solution: Add 49.05g of deionized water, 0.55g of acrylic acid and 0.30g of sodium hydroxide into a 100ml beaker, stir at room temperature to fully dissolve. Subsequently, 0.1 g of potassium persulfate as an initiator was added, heated and stirred in a water bath at 25° C. to dissolve evenly, and a colorless transparent liquid was obtained.

[0047] Preparation of solid polymer emulsifier: Add 50g of component 3 and 50g of component 4 into a 250ml four-neck flask equipped with a thermometer, agitator, and condenser, stir and...

Embodiment 2

[0049] In an embodiment of the present invention, the preparation of the radioactive aerosol compressed preparation includes:

[0050] The preparation method of component 1: Add 9g of acrylamide and 31.55g of deionized water into a 100ml beaker, stir at room temperature to dissolve the acrylamide, then add 9g of polymer emulsifier, heat in a water bath at 25°C and stir to fully dissolve, Then slowly add 0.45g of styrene, and stir and pre-emulsify at 40°C for 2h to obtain a colorless transparent liquid.

[0051] The preparation method of component 2: add 49.15g of deionized water, 0.55g of acrylic acid and 0.30g of sodium hydroxide into a 100ml beaker, stir at room temperature to fully dissolve. A colorless transparent liquid was obtained.

[0052] Preparation of radioactive aerosol compression preparation: Add 50g of component 1 and 50g of component 2 into a 250ml four-neck flask equipped with a thermometer, agitator, and condenser tube, stir and pre-emulsify at 45°C for 30mi...

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Abstract

The invention belongs to the technical field of nuclear pollution decontamination, and discloses a waterborne low surface tension high viscosity radioactive aerosol suppressant and a preparation method. Acrylamide is used as a main monomer, acrylic acid and styrene are used as functionally modified monomers, and self-emulsifying micro-emulsion polymerization is carried out to obtain the waterborne low surface tension high viscosity radioactive aerosol suppressant. The suppressant is a water-soluble suppressant, and accords with the characteristic of environmental friendliness. The suppressant has a relatively low surface tension, has good wetting wrapping properties to an aerosol, and at the same time has a relatively high viscosity, a film is formed by solidification after the aerosol is suppressed by the suppressant and falls to the ground, the high-viscosity suppressant is more conducive to solidification and recovery of suppressed dust, no secondary pollution to the environment is caused, and the suppressing efficiency adopting the prepared radioactive aerosol suppressant is 87.93% or more. At the same time, the suppressant has good film-forming properties, and thus an application of the suppressant in a nuclear emergency process is more conducive.

Description

technical field [0001] The invention belongs to the technical field of nuclear pollution decontamination, and in particular relates to a water-based low-surface-tension high-viscosity radioactive aerosol press preparation and a preparation method. Background technique [0002] Currently, the closest prior art: [0003] Radioactive aerosols refer to aerosols containing radionuclides or contaminated by radionuclides, which are easy to diffuse and can enter the human body through the respiratory system to cause internal exposure. Therefore, in nuclear accidents and nuclear emergency response, the removal of radioactive aerosol pollution is essential. is the key issue. [0004] Usually, the removal and treatment methods of conventional aerosol particles (non-radioactive) are mainly physical purification methods, mainly including four types: mechanical dust removal, filter dust removal, wet pressing, and electrostatic dust removal. The removal of radioactive aerosol should not ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F9/02
CPCG21F9/02
Inventor 李银涛周元林何智宇李迎军张世锋
Owner SOUTHWEAT UNIV OF SCI & TECH
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