Abstract
A polystyrene (PS)-based fibrous color dosimeter, comprising a color former based on 2-(phenylamino)-6-(dipentylamino)-3-methylspiro[9H-xanthene-9,3′-phthalide] (Black305) fluoran leuco dye and a 2-(4-methoxystyryl)-4,6-bis(trichloromethyl)-1,3,5-triazine (MBTT) photoacid generator, was developed for visual detection of X-ray doses of 15 Gy and higher. The composite fiber was produced by using a centrifugal spinning method, and the obtained composite fiber exhibited a stable and uniform morphology with a fiber diameter of 10 μm or less and had sufficient mechanical strength. As an example of practical application, we successfully processed the composite fiber into an apron and clearly and visually confirmed that the color change from yellow to black occurs on the surface of the fabric under X-ray exposure.
Highlights
In recent years, radiotherapy has made great strides, and it is possible to intensively irradiate only cancer cells with radiation and to suppress the effects on surrounding healthy cells as much as possible
We propose a fibrous color dosimeter with enhanced flexibility using only the photoacid generator
An examination of the morphologies of the composite fibers shows that these fibers are bead-free, as was found for the experiments in which the dependence on the Black305 concentration was examined. These results suggest that the viscosity of the PS solution controls the fiber morphology regardless of the concentrations of Black305 and MBTT
Summary
Radiotherapy has made great strides, and it is possible to intensively irradiate only cancer cells with radiation and to suppress the effects on surrounding healthy cells as much as possible. It is well-known that amounts of radiation doses have a harmful impact; small amounts of radiation doses have another aspect of stimulating various activities of the human body as physiological stimulation (radiation hormesis effect [1,2]). The fluorescent glass dosimeters require a dedicated reading device to measure the radiation exposure dose and have a fatal disadvantage in that the radiation exposure dose
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