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Preparation and use of low-temperature sprayable stripping radioactive contamination remover

A detergent and stripping technology, which is applied in the field of preparation of low-temperature sprayable stripping radioactive pollution detergent, can solve the problems of poor film mechanical properties, long film forming time, and difficulty in spraying, and achieve film-forming performance Excellent, short film-forming time, improved solubility

Active Publication Date: 2021-11-30
SOUTHWEAT UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong water absorption of biomass such as cellulose, inulin and lignin, its hydrosol freezes at low temperature and is difficult to spray, and the film-forming time is long, the film mechanical properties are poor, and it is brittle. In the application of peelable film restricted

Method used

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  • Preparation and use of low-temperature sprayable stripping radioactive contamination remover
  • Preparation and use of low-temperature sprayable stripping radioactive contamination remover
  • Preparation and use of low-temperature sprayable stripping radioactive contamination remover

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]A preparation method of a low-temperature sprayable stripping type radioactive contamination decontamination agent, comprising the following process: adding 0.5 g of modified biomass and 8 g of polyvinyl acetate into 100 g of solvent I, stirring and dissolving for 10 hours, and then Add 5g bayberry tannin (tannin content≥70%), citric acid, disodium edetate, and sodium dodecylsulfonate (mass ratio 1:1:1:0.1), 0.1g glycerin, stir Dissolved for 6 hours, ultrasonically degassed for 0.5 hours to obtain a detergent; the modified biomass is modified cellulose (see patent document ZL201410446471.5 for the modification method), and its weight ratio to lignin is 1:1; solvent I is the volume Ethanol and water in a ratio of 1:0.1.

[0030] A method for using a low-temperature sprayable peel-off radioactive contamination decontamination agent, comprising: spraying the decontamination agent on the surface of a radioactively contaminated material at -5°C, drying and solidifying to form...

Embodiment 2

[0032] A preparation method of a low-temperature sprayable stripping type radioactive contamination decontamination agent, comprising the following process: adding 8 g of modified biomass and 2 g of polyvinyl butyral to 100 g of solvent I, stirring and dissolving for 12 hours, and then Add 0.5g bayberry tannin (tannin content≥70%), 0.2g stearic acid, stirring and dissolving for 7h, ultrasonic degassing treatment for 0.6h, to obtain detergent; modified biomass is modified cellulose (modification method See patent document ZL201410446471.5), its weight ratio to lignin is 1:1; solvent I is ethanol.

[0033] A method for using a low-temperature sprayable peel-off radioactive contamination decontamination agent, comprising: spraying the decontamination agent on the surface of a radioactively contaminated material at -5°C, drying and solidifying to form a film at -5°C for 14 hours, Peel it off and the decontamination process is complete.

Embodiment 3

[0035] A preparation method of a low-temperature sprayable stripping type radioactive contamination decontamination agent, comprising the following process: adding 0.5 g of modified biomass and 5 g of polyvinyl butyral to 100 g of solvent I, stirring and dissolving for 14 hours, Then add 1g of tea polyphenols and 0.3g of tributyl phosphate, stir and dissolve for 8 hours, and perform ultrasonic degassing treatment for 0.7 hours to obtain a detergent; the modified biomass is modified cellulose (see patent document ZL201410446471.5 for the modification method) , and its weight ratio to lignin is 1:1; solvent I is ethanol and ethyl acetate with a volume ratio of 1:0.1.

[0036] A method for using a low-temperature sprayable peel-off radioactive contamination decontamination agent, comprising: spraying the decontamination agent on the surface of a radioactively contaminated material at -10°C, drying and solidifying to form a film at -10°C for 16 hours, Peel it off and the decontami...

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Abstract

The invention discloses a method for preparing and using a low-temperature sprayable stripping radioactive pollution decontamination agent, which includes the following process: adding modified biomass and polyvinyl butyral / polyvinyl acetate into solvent I , stirring and dissolving, then adding decontamination aid and plasticizer, stirring and dissolving, ultrasonic degassing treatment, to obtain decontamination agent. Spray the decontamination agent on the surface of radioactively contaminated materials at -30-0°C, dry and solidify at -30-0°C to form a film for 10-24 hours, and then peel it off to complete the decontamination process; among them, The material with radioactive contamination mentioned above is any one of stainless steel, plastic, glass, ceramic tile, and alkyd paint board. The detergent of the present invention is mainly composed of cellulose, lignin, plant polyphenols and other biomass and synthetic polymers. After the detergent is formed into a film at low temperature for decontamination, the stripped film can be partially degraded, which is convenient for volume reduction and storage Curing treatment to reduce secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of low-temperature decontamination of radioactive pollution and the field of utilization of biomass resources, in particular to a method for preparing and using a low-temperature sprayable stripping radioactive pollution decontamination agent. Background technique [0002] There are many decontamination technologies for decommissioning nuclear facilities, such as sandblasting, ultrasonic cleaning, dry ice cleaning, chemical cleaning, etc. The peelable membrane decontamination method is one of the most effective radioactive pollution control and removal technical measures reported so far. Because of its simple operation, short film forming time, high removal rate, and less secondary waste, it can realize rapid pollution control and decontamination, and is an ideal technical measure. However, most of the existing strippable decontamination materials and technologies are used at room temperature. Under low temp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D131/04C09D151/02C09D197/00C09D129/14C09D5/20C09D7/63C09D7/65C08B37/18C08F251/00C08F220/14C08F226/02G21F9/00
CPCC08B37/0054C08F251/00C08L2205/03C08L2205/035C09D5/20C09D129/14C09D131/04C09D151/02C09D197/005C09D7/63C09D7/65G21F9/001C08F220/14C08F226/02C08L51/02C08L97/005C08K5/092C08K5/175C08K5/42C08K5/053C08K5/1545C08L29/14C08K5/09C08K5/521C08L5/00C08K5/12C08L31/04Y02P20/54
Inventor 林晓艳付登峰谢宇潘训海李健李战国罗学刚
Owner SOUTHWEAT UNIV OF SCI & TECH
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