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Radioactive surface strippable detergent and preparation method thereof

A radioactive and decontaminant technology, used in radioactive purification, coating, nuclear engineering, etc., can solve the problems of not carrying out real hot chamber decontamination experiments, staying in additives, etc., to achieve good peelability, long shelf life, and stability. good effect

Active Publication Date: 2020-11-10
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] According to the literature research, for PVA as the main material, the decontamination experiment of the peelable film can be carried out by doping additives, but most of the research is still on the effect of additives on the performance of the mold body or laboratory simulation experiments, and there is no real heat chamber. Decontamination experiment

Method used

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  • Radioactive surface strippable detergent and preparation method thereof
  • Radioactive surface strippable detergent and preparation method thereof

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preparation example Construction

[0071] The preparation method of radioactive surface strippable detergent, comprises the following steps:

[0072] a. Dissolve polyvinyl alcohol in water, stir at 90-100°C for 24-48 hours, wait until the polyvinyl alcohol is completely dissolved, then add gelling agent until completely dissolved, and cool down to 70-80°C, then add dispersant and reinforcing agent React with a surfactant for 10-30 minutes to obtain solution A;

[0073] b. Add dispersant, adhesive, chelating agent, and auxiliary film-forming agent into solution A, and wait for complete dissolution to obtain solution B;

[0074] c. Add lubricant, antifreeze, plasticizer, petrolatum, emulsifier and thickener to solution B, mix well, react for 30min to 120min, and then cool to obtain detergent;

[0075] Wherein, the temperature of the reaction system in step b and step c is 70-80°C.

[0076] The preparation of the detergent of the present invention needs to be carried out according to the mixing method of the pre...

Embodiment 1

[0085] (1) Put 15g of PVA in 200mL of water, heat to 98°C, stir for 24h to dissolve completely; then lower the temperature to 90°C, and keep stirring for 30min. Then add 0.5g agar, and lower the temperature to 75°C, and react for 10min. Then add 0.3g of talcum powder, 0.5g of white carbon black, and 0.3g of sodium stearate, stir at 75°C, and react for 10min to obtain solution A.

[0086](2) Dissolve 0.10g of sodium tripolyphosphate, 0.50g of starch, 0.1g of citric acid, and 0.2g of acrylic resin in water, disperse evenly, then add them to solution A, and keep stirring at 75°C to obtain a solution b.

[0087] (3) 2g Span 60, 0.6g diethylene glycol, 1.0g dimethyl phthalate, 0.15g petrolatum and 0.5g sodium alkylbenzene sulfonate (dissolve 0.5g sodium alkylbenzene sulfonate in solution in deionized water) was added to solution B, stirred and mixed evenly, and reacted for 30 minutes. Natural cooling is adopted to obtain a detergent.

[0088] The obtained detergent was observed...

Embodiment 2

[0090] (1) Preparation of oxidized starch: Stir and mix starch and water at a mass ratio of 1:10, adjust the pH value of the system to about 10 with NaOH with a concentration of 4%; then add CuSO 4 (0.1mol / L, 0.6mL) solution was used as a catalyst, stirred evenly, and then added H 2 o 2 (mass fraction 0.6%) solution oxidizes the starch, the oxidation time is 20min, the oxidation temperature is 30°C, and the unreacted H is removed with sodium bisulfite after oxidation. 2 o 2 . The prepared oxidized starch is used as an adhesive for later use.

[0091] (2) Put 15g of PVA in 200mL of water, heat to 98°C, stir for 24h to dissolve completely; then lower the temperature to 90°C, and keep stirring for 30min. Then add 0.5g agar, and lower the temperature to 75°C, and react for 10min. Add 0.3g of talcum powder, 0.5g of white carbon black, and 0.3g of sodium stearate, stir at 75°C, and react for 10min to obtain solution A.

[0092] (3) Dissolve 0.10g sodium tripolyphosphate, 0.50g...

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Abstract

The invention relates to a radioactive surface strippable detergent and a preparation method thereof, and belongs to the technical field of application of polymer chemical coating materials to nuclearfacility surface radioactive decontamination. The radioactive surface strippable detergent is prepared by taking polyvinyl alcohol as a main film-forming agent, taking water as a solvent and adding an auxiliary agent, wherein the auxiliary agent is prepared from the following components: a gelatinizing agent, a dispersing agent, a reinforcing agent, a surfactant, an adhesive, a chelating agent, an auxiliary film-forming agent, a lubricating agent, an anti-freezing agent, a plasticizer, Vaseline, an emulsifying agent and a thickening agent. The prepared strippable film detergent is good in film-forming property, long in quality guarantee period and good in strippability, and can meet the operation requirements of short-term and medium-term storage and stainless steel surfaces for radioactive waste pits and hot chambers.

Description

technical field [0001] The invention relates to a radioactive surface strippable decontamination agent and a preparation method thereof, and belongs to the technical field of polymer chemical coatings applied to radioactive decontamination of nuclear facility surfaces. Background technique [0002] In the nuclear field, there are various manifestations of radioactive pollution, among which the more common one is surface and interface pollution of objects. With the length of pollution time, it mainly manifests as penetrating deep pollution, combined tight pollution, and surface loose pollution. Although the difficulty of removal of these types of surface and interface pollution is gradually reduced, the spreadability of pollution is gradually increased. For example, although surface loose pollution is relatively easy to remove, it is easy to produce radioactivity during the movement, handling or related activities of the contaminated objects. The migration of pollution and ev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/20C09D129/04C09D7/61C09D7/63C09D7/65C09D7/20G21F9/00
CPCC09D5/20C09D129/04C09D7/61C09D7/63C09D7/65C09D7/20G21F9/002C08L2205/035C08K2003/324C08L3/02C08L5/12C08L33/00C08K13/04C08K7/26C08K3/34C08K5/098C08K3/32C08K5/092C08K5/12C08L3/10C08L5/00
Inventor 王孝强匙芳廷周道辉阴金玉安鹏邹浩何源税胡高远唐娇林静若岚
Owner SOUTHWEAT UNIV OF SCI & TECH
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