Abstract
Strippable film is effective for removing radioactive contamination. However, it still has some limitations, such as the long curing time (about 30 min~24 h) and the requirement of organic solvents. To address these issues, we report a simple protocol to prepare strippable decontamination films using liquid polybutadiene (LPB) and tert-butyl acrylate (TBA) as the raw materials without solvent and using camphorquinone/ethyl 4-dimethylaminobenzoate (CQ/EDB) as a photoinitiator, where the film was formed under household LED panel light or daylight irradiation for about 540 s. After a thorough study of viscosity, real-time Fourier transform infrared (RT-FTIR spectra), gel and volatile organic compound (VOC) contents, mechanical properties and decontamination efficiency, the optimum composition and curing conditions were determined for the decontamination strippable film. VOC content is as low as 12.7 ± 0.7% and the resultant strippable film exhibits good mechanical performances with a tensile strength of up to 5.4 ± 0.4 MPa and elongation of up to 66.6 ± 13%. Most important, the decontamination efficiencies of this strippable film for 133CsCl on glass, ceramic and metal surfaces reach up to 98.1%, 94.3% and 97.6%, respectively.
Highlights
Nuclear energy, a zero-emission clean energy source, has been proposed as an alternative to fossil fuels because it does not emit huge amounts of pollutants such as carbon dioxide, nitrogen and sulfur dioxide into the atmosphere [1]
Before studying the visible light curing behavior of the liquid polybutadiene (LPB)/tert-butyl acrylate (TBA) solution, it was necessary to investigate the photopolymerization of TBA
Gel permeation chromatography (GPC) was employed to analyze the molecular weight of Preparation of TBA Homopolymer (PTBA)
Summary
A zero-emission clean energy source, has been proposed as an alternative to fossil fuels because it does not emit huge amounts of pollutants such as carbon dioxide, nitrogen and sulfur dioxide into the atmosphere [1]. In the field of radioactive decontamination, strippable films have been explored for a long time, but most previously reported strippable films require the use of large quantities of solvents such as ethanol and ethyl acetate They have obvious problems of volatile organic compound (VOC) emissions which are harmful to the environment and human safety and greatly limit their application in large-scale decontamination. The trifunctional allyl compound or resin in the above three UV-cured strippable film formulations resulted in their high viscosity and greatly limited their application in large-scale spraying. These systems require UV light to be activated, but UV light is harmful to eyes. The use of commercially available raw materials and the simplicity of this strippable film make it suitable for industrial adoption
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