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Preparation and application method of a strippable cellulose-based radioactive contamination decontamination agent

A cellulose-based, detergent technology, applied in radioactive purification, coating, nuclear engineering, etc., can solve the problems of refractory waste degradation, unfavorable environmental sustainable development, secondary pollution, etc., and achieve abundant resources and easy storage Curing treatment, the effect of high capacity reduction rate

Active Publication Date: 2017-01-04
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of synthetic polymer compounds depends on the increasingly scarce non-renewable resources such as oil and natural gas; and the waste generated after use is difficult to degrade, which is easy to cause secondary pollution, which is not conducive to the sustainable development of the environment

Method used

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  • Preparation and application method of a strippable cellulose-based radioactive contamination decontamination agent
  • Preparation and application method of a strippable cellulose-based radioactive contamination decontamination agent
  • Preparation and application method of a strippable cellulose-based radioactive contamination decontamination agent

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preparation example Construction

[0037] The invention provides a preparation method of a strippable cellulose-based radioactive contamination remover, wherein the method comprises the following steps:

[0038] Step a, modifying the pre-prepared cellulose ether by grafting:

[0039] Add 2-8 parts by weight of cellulose ether to 80-150 parts by weight of distilled water, and heat in a water bath under the premise of passing through a protective gas until the temperature reaches 60-80 ° C, then stir for 10-30 minutes, and then sequentially Add 0.05-0.30 parts by weight of initiator and stir for 10-30 minutes and 2-8 parts by weight of vinyl acetate monomer to react for 3-6 hours, and the resulting mixture is centrifuged and dried under vacuum at 45-65°C The crude product is obtained in 10-14 hours; the crude product is crushed and placed in a Soxhlet extractor and extracted with acetone for 22-26 hours to obtain a cellulose ether grafted product;

[0040] Here, when vinyl acetate monomer is added for reaction, ...

Embodiment 1

[0050] The graft modification of step a, hydroxypropyl methylcellulose:

[0051] Add 2 parts by weight of hydroxypropyl methylcellulose to 80 parts by weight of distilled water, pass through nitrogen protection, heat in a water bath to 60°C, stir for 10 minutes, add 0.10 parts by weight of ammonium persulfate and stir for 10 minutes, then add 2 parts by weight of Parts of vinyl acetate monomer were reacted under nitrogen protection at 60°C for 6 hours, centrifuged, and vacuum-dried at 45°C for 12 hours to obtain a crude product, which was pulverized in a Soxhlet extractor and extracted with acetone for 24 hours to obtain Remove the hydroxypropyl methylcellulose graft copolymerized vinyl acetate product of by-product;

[0052] Step b, utilize the obtained hydroxypropyl methylcellulose graft copolyvinyl acetate product to prepare detergent: at room temperature, 2 parts by weight of hydroxypropyl methylcellulose graft copolyvinyl acetate product are dissolved in 80 In the aqueou...

Embodiment 2

[0056] The graft modification of step a, hydroxypropyl methylcellulose:

[0057] Add 3 parts by weight of hydroxypropyl methylcellulose to 100 parts by weight of distilled water, pass through nitrogen protection, heat in a water bath to 80°C, stir for 15 minutes, add 0.15 parts by weight of ammonium persulfate and stir for 15 minutes, then add 3 parts by weight of Parts of vinyl acetate monomer were reacted under nitrogen protection at 80°C for 5 hours, centrifuged, and vacuum-dried at 60°C for 12 hours to obtain the crude product, which was pulverized in a Soxhlet extractor and extracted with acetone for 24 hours to obtain Remove the hydroxypropyl methylcellulose graft copolymerized vinyl acetate product of by-product;

[0058] Step b, utilize the obtained hydroxypropyl methylcellulose graft copolyvinyl acetate product to prepare detergent: at room temperature, 4 parts by weight of hydroxypropyl methylcellulose graft copolyvinyl acetate product are dissolved in 96 In the wei...

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Abstract

The invention discloses a method for preparing and using a strippable cellulose-based radioactive pollution decontamination agent, which is characterized by: a. modifying the pre-prepared cellulose ether by grafting; then using the prepared fiber The detergent was prepared from the ether grafted product. b. Spray the decontamination agent evenly on the surface of the radioactively contaminated material, dry at 20-60°C for 15-22 hours to form a film, and peel off the film to complete the decontamination process. The detergent provided by the invention uses cellulose with abundant resources as a raw material, has a simple preparation method, and has obvious decontamination effect, and can resist a certain dose of radiation and show easy peeling and good decontamination properties; further is , After decontamination, the solid waste can be biodegraded or incinerated, with a high capacity reduction rate, which is convenient for storage and solidification treatment, meets the requirements of sustainable development, and has great economic and social benefits.

Description

technical field [0001] The invention belongs to the field of nuclide decontamination and utilization of biomass resources, and in particular relates to the preparation of a strippable cellulose-based radioactive decontamination agent and its method for removing radioactive stains on the surface of materials. Background technique [0002] Peelable membrane decontamination is a new type of decontamination technology developed in the 1980s with the implementation of nuclear decommissioning. A lot of research has been done on the application of this technology in China. This technology is to prepare film-forming agent, mixed solvent, decontamination aid and other components into jelly, spray it on the surface contaminated by radioactivity, the pollutants will chemically react with the complexing agent in the coating film, And through the adsorption of the coating film, the pollutants are separated from the surface. After the coating film dries into a thin film, the film body is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D151/02C09D5/20C08F251/02C08F218/08G21F9/28
Inventor 林晓艳陈云霞帅闯罗学刚尚宁宁
Owner SOUTHWEAT UNIV OF SCI & TECH
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