Novel irradiation indication film and preparation method thereof

Abstract

The invention discloses a novel irradiation indication film which comprises a polyester substrate, a discoloring coating and a protective film connected sequentially from bottom to top. The discoloring coating is made of following materials: adding PVB (polyvinyl butyral) of 0.5-0.7 g (gram), 10, 12-twenty-three carbon diyne acid of 0.4-0.5 g, and photoinitiator of 1.2-1.3 g into absolute ethyl alcohol of 10ml (milliliter) and then mixing uniformly to obtain a discoloring coating solution. A preparation method of the irradiation indication film includes that washing the polyester substrate with the absolute ethyl alcohol, after the polyester substrate becomes dry, coating the discoloring coating on the polyester substrate, and sticking the protective film on the polyester substrate after drying. The indication film has a fine response effect within 5-50 Gy dosage range, whether or not an irradiated object goes through irradiation can be determined by observing discoloring condition with naked eyes, absorbed radiation dosage of the irradiated object can be further identified by measuring absorbance value ration, and selection range of materials is enlarged.

Description

[0001] technical field [0002] The invention relates to a radiation indicating card, in particular to a novel radiation indicating film and a preparation method thereof, which are used for dose monitoring in nuclear radiation application technology. [0003] Background technique [0004] In recent years, with the development of atomic energy, the civilian use of nuclear technology has become increasingly popular, but there is generally a lack of on-site dose measurement methods. The International Atomic Energy Agency has organized several comparisons of international dosimeters, some of which use color-changing film dosimeters. Because it has the advantages of real-time recording and display, good tissue equivalence and small size, the meter has attracted people's attention. In the early days, polyvinyl alcohol films containing methylene blue were made, and later there were films composed of halogenated alkane azo dyes. In recent years, China is also starting to develop ...

AI Technical Summary

Problems solved by technology

[0005] The invention patent with the Chinese patent application number "201110243007.2" discloses a radiation indicator card and its preparation and use method. The preparation method of the radiation indicator card includes the following steps: 1) Prepare the color-changing liquid: the color-changing liquid mixes the color-changing substance 10, Add 30g-35g of 12-diynpentacosanoic acid and 55g-75g of binder into 1000ml of organic solution, and leave it at room temperature for 12 hours overnight, or heat the above solution to 62-65°C and stir thoroughly to fully dissolve the solid matter , to make a color-changing liquid; 2) Pouring and adding film: put an A4-sized polyester film as the base layer on the workbench, and stick it around with 1mm thick adhesive tape to form a small wall with a height of 1mm around it, and then use a syringe Pour the color-changing liquid in the small enclosure, with a height of no more than 1mm. Dry the color-changing liquid with an electric hair dryer. After drying, stick a layer of A4-sized polyester film on the color-changing liquid, and then put it on the two layers of polyester film. Paste a layer of anti-ultraviolet film; the indicator card can judge the radiation dose by directly comparing it with the standard color scale under the colorimetric area. However, there are still the following problems: the color-changing substance of the indicator card is 10,12-diyne 20 Pentadecanoic acid, the sensitivity to radiation dose response needs to be improved. It can only be determined by visually observing its discoloration whether the irradiated object has been irradiated, and the radiation dose absorbed by the irradiated object cannot be quantitatively identified.

2. The raw material is single, and the range of options is narrow, and its production cost is subject to the price of 10,12-diynpentacosanoic acid

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