Peelable decontamination material with uranium developing and tracing function, preparation method and application

By introducing the amphiphilic block copolymer PEA-b-PAA synthesized by RAFT polymerization as a dispersant into the peelable decontamination material, the dispersibility problem of the colorimetric indicator in the aqueous system was solved, realizing real-time visual tracing and efficient decontamination of uranium contamination, and improving the film-forming properties and mechanical properties of the material.

CN121293818APending Publication Date: 2026-01-09SOUTHWEAT UNIV OF SCI & TECH
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Patent Information

Application Number
CN202511321738.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-16
Publication Date
2026-01-09

AI Technical Summary

Technical Problem

Existing strippable decontamination materials exhibit poor dispersibility as color indicators in aqueous systems, tending to agglomerate and settle, resulting in uneven color development, low sensitivity, and an inability to identify the extent and degree of uranium contamination in real time.

Method used

The amphiphilic block copolymer PEA-b-PAA synthesized by RAFT polymerization was used as a dispersant and combined with the colorimetric indicator Br-PADAP to form a peelable decontamination material with uranium colorimetric tracing function, ensuring that the indicator is stably dispersed in the aqueous system and fully complexed with uranyl ions.

Benefits of technology

It enables real-time, intuitive, and visual tracing of uranium contamination, improves colorimetric sensitivity, increases decontamination efficiency to over 90%, and enhances the film-forming properties and mechanical properties of the material, making it suitable for on-site application in nuclear facilities.

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Abstract

The invention belongs to the technical field of nuclear pollution decontamination, and particularly discloses a strippable decontamination material with a uranium developing and tracing function as well as a preparation method and application of the strippable decontamination material with the uranium developing and tracing function. The strippable decontamination material is prepared by taking polyvinyl alcohol (PVA) and the like as film-forming base materials and 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (Br-PADAP) as a developing indicator; and an amphiphilic block copolymer PEA-b-PAA prepared by RAFT polymerization is innovatively adopted as a dispersing agent, so that the technical problems that Br-PADAP is poor in dispersity and easy to agglomerate in a water-based system are effectively solved. The material can be subjected to complexation reaction with uranium pollutants in the decontamination process, color change visible to naked eyes is generated, and visual tracing of a polluted area is achieved; meanwhile, the film-forming property is excellent, complete stripping can be achieved after curing, the decontamination rate on the surfaces of various base materials is all higher than 90%, and the detection limit on uranium can reach 0.81 * 10 <-6 > mol / cm < 2 >. The method is easy and convenient to operate, environmentally friendly and particularly suitable for rapid identification and removal of large-range uranium pollution in nuclear facility decommissioning and accident emergency.
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