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A self-stratified radioactive pollution control and removal material, its preparation method and application

A self-layering, water-based technology, applied in radioactive purification, coating, reactors, etc., can solve the problems of reducing the encapsulation of decontamination materials to radioactive dust, limiting the selection range of polymer emulsions, and weakening the decontamination and removal effect of materials. Improve the effect of radioactive pollution removal, reduce density, and solve the effect of easy settlement

Active Publication Date: 2021-07-20
中国人民解放军军事科学院国防工程研究院工程防护研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The authorized announcement number is: CN 107129736B, and the title of the invention is: a radioactive contamination control and removal material with radiation shielding ability. In this patent, the shielding element lead is introduced into the polymer film-forming emulsion by chemical reaction to make the decontamination material Possess radiation shielding ability, which requires that the polymer film-forming emulsion has active sites for chemical reaction with the shielding functional components, otherwise it is impossible to introduce shielding functional elements through chemical reactions, which greatly limits the selection of polymer emulsions in cleaning materials Scope and regulation of comprehensive performance of decontamination materials
[0004] The introduction of shielding functional components through physical blending, that is, mixing shielding functional bodies (mostly powdered shielding metals or their compounds) into the detergent formulation, there are also two technical bottlenecks: one is the powder of such shielding metals and their compounds The density is much higher than that of the film-forming component, and it is easy to settle at the bottom of the pressed decontamination material, seriously reducing the film-forming performance of the material; second, the addition of shielding powder will occupy the pigment volume of the coating system, reducing the impact of the decontamination material on radioactive dust. Encapsulation, thereby impairing the stain-removing effect of the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A self-layering radioactive pollution control and removal material, which is composed of the following raw materials in parts by mass: 350 parts of water-based pure acrylic emulsion; 5 parts of F-20D microsphere foaming agent; WO 3 30 parts of shielding powder; 10 parts of thixotropic agent; 3 parts of dispersant; 3 parts of wetting agent; 0.5 parts of defoamer.

[0037] The preparation method of the above-mentioned self-layered radioactive contamination control and removal material is as follows:

[0038] The WO that will be weighed according to the above ratio 3 Add an appropriate amount of water and stir for 5 minutes to make it into a paste, then add a proportioned amount of F-20D microsphere foaming agent, and then fully stir for 5 minutes and then foam at 80°C to prepare a lightweight shielding functional composition;

[0039] Then add the water-based pure acrylic emulsion, thixotropic agent, dispersant, and wetting agent weighed according to the proportion to t...

Embodiment 2

[0042] A self-layering radioactive pollution control and removal material, which is composed of the following raw materials in parts by mass: 350 parts of aqueous vinegar-acrylic emulsion; 5 parts of F-20D microsphere foaming agent; WO 3 30 parts of shielding powder; 10 parts of thixotropic agent; 3 parts of dispersant; 3 parts of wetting agent; 0.5 parts of defoamer.

[0043] The preparation method of the above-mentioned self-layered radioactive contamination control and removal material is as follows:

[0044] The WO that will be weighed according to the above ratio 3 Add an appropriate amount of water and stir for 5 minutes to make it into a paste, then add a proportioned amount of F-20D microsphere foaming agent, stir fully for 5 minutes, and then foam at 80°C to prepare a lightweight shielding function composition.

[0045] Then add the water-based pure acrylic emulsion, thixotropic agent, dispersant, and wetting agent weighed according to the proportion to the above-men...

Embodiment 3

[0048] A self-layering radioactive pollution control and removal material, which is composed of the following raw materials in parts by mass: 200 parts of water-based pure acrylic emulsion, 150 parts of water-based vinegar-acrylic emulsion; 5 parts of F-20D microsphere foaming agent; 25 parts of PbO shielding powder 10 parts of thixotropic agent; 3 parts of dispersant; 3 parts of wetting agent; 0.5 parts of defoamer.

[0049] The preparation method of the above-mentioned self-layered radioactive contamination control and removal material is as follows:

[0050] Add an appropriate amount of water to the PbO weighed according to the above ratio and stir for 5 minutes to make it into a paste, then add a proportioned amount of F-20D microsphere foaming agent, and then fully stir for 5 minutes and then foam at 80 ° C to prepare light Quantification of shielding functional compositions.

[0051] Then add the water-based pure acrylic emulsion, water-based vinegar-acrylic emulsion, thi...

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Abstract

The invention discloses a self-layered radioactive pollution control and removal material and its preparation method and application. The material includes a water-based basic film-forming agent, a microsphere foaming agent, a shielding powder, a thixotropic agent, a dispersant, a wetting agent and Defoaming agent; by physically mixing a lightweight shielding functional composition into the basic film-forming agent to solve the technical problem that the shielding component is easy to settle; at the same time, the density difference between the basic film-forming agent and the lightweight composition further promotes the self-layering of the material And it is enriched in the upper layer of the coating film, does not occupy the pigment volume content of the decontamination material of the lower layer, and solves the technical problem that the addition of fillers weakens the decontamination effect.

Description

technical field [0001] The invention belongs to the technical field of engineering decontamination, and in particular relates to a self-layered radioactive pollution control and removal material, a preparation method and an application. Background technique [0002] With the development and utilization of nuclear energy, the probability of nuclear leakage accidents in nuclear facilities such as nuclear power plants and experimental reactors due to accidents or human errors is objective and inevitable, such as nuclear leakage in Chernobyl, Three Mile Island, and Fukushima ACCIDENT. When radioactive substances produced by nuclear leakage accidents spread in a large area, they will pose a serious threat to the environment and public safety. The stripping press decontamination technology is a common method for removing radioactive pollutants in a large area. It has many advantages such as simple operation, only a single solid waste, and no secondary pollution. However, the com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/04C09D131/04C09D7/61C09D7/65B05D7/24B05D1/02G21F1/02G21F9/00
CPCB05D1/02B05D7/24C08K2003/2234C08K2003/2258C08L2205/03C08L2205/035C09D131/04C09D133/04C09D7/61C09D7/65G21F1/02G21F9/001C08L29/04C08L1/284C08K3/22C08L31/04
Inventor 王静郑力李坚赵莉
Owner 中国人民解放军军事科学院国防工程研究院工程防护研究所