An ionizing radiation dose meter based on polymer structural color material and its dose reading method
Through an ionizing radiation dosimeter based on polymer structure color materials, the structural changes under radiation, combined with spectral measurement and color card comparison, the problem of insufficient environmental adaptability of traditional radiation dosimeters is solved, and intuitive and convenient radiation dosage reading is achieved.
Patent Information
- Application Number
- CN202210895112.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-07-28
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2042-07-28
AI Technical Summary
The existing radiation dosimeters have shortcomings in real-time monitoring and environmental adaptability, which is difficult to meet the new needs of nuclear technology applications. Traditional dosimeters have problems such as large size, high cost, short life, high dependence on radiation type and energy, and are affected by environmental factors.
Using an ionizing radiation dosimeter based on polymer structure color materials, the cross-linking or degradation effect of polymer materials is used to change the structure under radiation using polymer or hydrogel with microstructure to achieve color change, and dosage reading is performed in combination with spectral measurement and color card comparison.
Real-time monitoring of radiation dose and multiple reading methods are realized, environmental adaptability is enhanced, application scope is broadened, and the reading method is intuitive and convenient.
Smart Images
Figure CN115469348B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of functional materials and radiation applications, in particular to an ionizing radiation dose meter based on polymer structural color materials and a dose reading method thereof. Background Art
[0002] Radiation dosimeters measure and record ionizing radiation through the thermal, mechanical, optical, electrical, and chemical effects generated by its interaction with matter. Currently, commonly used radiation dosimeters include ionization chamber dosimeters, film dosimeters, semiconductor dosimeters, and chemical dosimeters. Ionization chamber dosimeters are large and complex, making them difficult to use in production, except for scientific research. While film dosimeters offer good spatial resolution, they require post-exposure fixing, making real-time monitoring and measurement impossible. Semiconductor dosimeters, while highly sensitive, are expensive, have short lifespans, and are highly dependent on radiation type and energy. While chemical dosimeters are less expensive, their dose range is typically limited; for example, a ferrous sulfate dosimeter typically operates within a range of 40-400 Gy. Furthermore, chemical dosimeters require post-measurement analysis and cannot monitor radiation doses in real time. Thin-film colorimeter dosimeters, which use radiochromic chemical dyes as their response materials, can achieve real-time detection and spatial resolution of radiation doses. However, these dosimeters are significantly affected by temperature and humidity, and they also change color when exposed to ultraviolet light, severely limiting their application. While these traditional radiation dosimeters have long been used and each has its own advantages, they are increasingly unable to fully meet the new demands of current nuclear technology applications.
[0003] Photonic crystals are artificial periodic dielectric structures with photonic band gap properties. They exhibit bright structural color, allowing them to be read by the naked eye, spectroscopy, chemical analysis, and other methods. Consequently, they have broad and important applications in intelligent detection, counterfeit identification, graphic printing, and many other fields. The color parameters of responsive polymer photonic crystals can be designed to change in response to various external conditions, such as temperature, chemical environment, light, and electromagnetic fields, enabling accurate and intuitive observation of environmental changes.
[0004] Although the radiation effects of polymer materials, including cross-linking, cleavage, and the corresponding protective agents and sensitizers, have become a systematic research discipline, there are no relevant research reports on the radiation effects and response mechanisms of polymers or hydrogel materials with microstructures and structural colors. Summary of the Invention
[0005] In order to solve the above problems, the present invention provides an ionizing radiation dosimeter based on polymer structural color materials and a dose reading method thereof. Based on the radiation effects such as cross-linking or degradation of polymer materials, the polymer or hydrogel with a microstructure and structural color changes its structure under the action of radiation, thereby achieving color changes.
[0006] The present invention adopts the following technical solutions:
[0007] An ionizing radiation dose meter made of a polymer structural color material, wherein the dose meter is a single layer or multiple layers of superimposed polymer structural color material film;
[0008] The polymer structural color material is a three-dimensional ordered structure composed of polymers or a disordered structure composed of stacked monodisperse microspheres composed of polymers;
[0009] The three-dimensional ordered structure composed of the polymer is an artificial periodic polymer dielectric structure with a two-dimensional or three-dimensional periodic structure; the periodic structure has at least one dimension of 100nm-1000nm and has a specific optical bandgap, and the optical bandgap can move under ionizing radiation.
[0010] The disordered structure of the monodisperse microspheres composed of the polymer is an amorphous structural color material formed by the disordered accumulation of spherical polymer microstructures with a monodisperse radius of 100-1000nm, or the inverse structure of the spherical polymer microstructure, and its reflection spectrum peak can move under ionizing radiation.
[0011] Furthermore, the polymer structural color material is a three-dimensional orderly stacked inverse opal structure, that is, a three-dimensional spherical hole structure of a close-packed structure.
[0012] Furthermore, the polymer structural color material is a polymer formed by biological source proteins and polysaccharides and their chemical modification, and the chemical modification refers to the grafting of functional groups containing special functions, such as functional groups containing double bonds, or functional groups coordinated with metal ions.
[0013] Furthermore, the biosource protein is directly applied or modified with additional double bonds in a methacrylated hydrogel.
[0014] Furthermore, the disordered structure of the monodisperse microspheres composed of the polymer contains 0%-10% carbon black to increase color saturation.
[0015] Furthermore, the thickness of the polymer structural color material film is 10-1000um.
[0016] Furthermore, the polymer structure includes a hydrogel structure.
[0017] The measurement and reading method of the ionizing radiation dose meter comprises the following specific steps:
[0018] After the dosimeter is exposed to a radiation field, an instrument is used to measure the reflection or absorption spectrum. The dose value of the ionizing radiation received by the dosimeter can be obtained by comparing it with a standard color card or taking a photo to read the color value or measuring its spectrum peak with a spectrum measuring device.
[0019] Furthermore, the measuring instrument used is a fiber optic spectrometer or a spectrophotometer.
[0020] Furthermore, the radiation field includes a neutron beam, a proton beam, an electron beam, an ion beam, an α, β or γ radiation field.
[0021] Beneficial effects: The present invention proposes a polymer or hydrogel with a microstructure and structural color as a radiation dosimeter. Based on radiation effects such as cross-linking or degradation of polymer materials, the polymer material with a multi-layer, periodically arranged small pore structure changes its structure under the action of radiation, thereby realizing color changes. Compared with the existing technology, the present invention improves the changes in color depth and absorbance of traditional radiation color-changing dosimeters into changes in reflection / absorption wavelengths, converting color depth measurement into hue measurement. It has the advantages of easy use, intuitive observation, and high inertness to environmental factors. It can also adopt multiple reading methods such as color card comparison, photographic reading, and spectral measurement, which greatly broadens its practical application range. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 The three-dimensional ordered microstructure color of polymers is used for radiation dose detection;
[0023] Figure 2 The amorphous microstructure color of polymers is used for radiation dose detection;
[0024] Figure 3 The three-dimensional ordered microstructure color of hydrogels is used for radiation dose detection. DETAILED DESCRIPTION
[0025] The technical solution of the present invention is further illustrated below by way of examples.
[0026] An ionizing radiation dose meter made of a polymer structural color material, the dose meter is a single layer or multiple layers of superimposed polymer structural color material film; the thickness of the polymer structural color material film is 10-1000um.
[0027] The polymer structural color material comprises a three-dimensional ordered stacked inverse opal structure, i.e., a close-packed three-dimensional spherical porous structure. The polymer structural color material is a polymer formed from bio-sourced proteins and polysaccharides, and chemically modified versions thereof. The bio-sourced proteins are either directly applied or modified with methacrylated hydrogels containing additional double bonds.
[0028] The polymer structural color material includes a three-dimensional ordered structure composed of polymers or a disordered structure composed of stacked monodisperse microspheres composed of polymers;
[0029] The three-dimensional ordered structure composed of the polymer is an artificial periodic polymer dielectric structure with a two-dimensional or three-dimensional periodic structure; the periodic structure has at least one dimension of 100nm-1000nm and has a specific optical bandgap, and the optical bandgap can move under ionizing radiation.
[0030] The preparation method of the three-dimensional ordered structure composed of the polymer is:
[0031] 64 ml of ethanol, 8.6 ml of ultrapure water, 3 ml of ammonia, and a certain amount of tetraethyl orthosilicate were mixed and stirred at a constant stirring speed for 4 hours. The mixture was then centrifuged to obtain a precipitate. The precipitate was then washed three times with water and three times with ethanol to obtain monodisperse silica particles, which were then dispersed in a certain volume of ethanol. The ethanol dispersion of silica was dropped onto a glass slide. After the ethanol evaporated, a self-assembled silica template with a three-dimensional ordered structure was obtained. Polytetrafluoroethylene sheets of varying thicknesses were used as a support frame. A polymer precursor was injected into the template between two glass slides, allowing the precursor solution to penetrate the gaps between the silica particles. The polymer film was polymerized under ultraviolet light to obtain a polymer film. The silica particles in the film were then etched with a diluted hydrofluoric acid solution to obtain a polymer film with a three-dimensional ordered pore structure.
[0032] The disordered structure of monodisperse polymer microspheres is an amorphous structural color material formed by the disordered accumulation of spherical polymer microstructures with a monodisperse radius of 100-1000 nm, or the inverse structure of such spherical polymer microstructures. Its reflectance spectrum peak can shift under ionizing radiation. The disordered structure of monodisperse polymer microspheres contains 0%-10% carbon black to enhance color saturation.
[0033] The preparation method of the disordered structure of the monodisperse microspheres composed of the polymer is as follows:
[0034] Mix 64 ml of ethanol, 8.6 ml of ultrapure water, 3 ml of ammonia water, and a certain amount of tetraethyl orthosilicate, stir at a certain stirring speed for 4 hours, and then centrifuge to obtain a precipitate. Then wash it with water and ethanol three times respectively to obtain monodispersed silica particles, disperse them in a certain volume of ethanol and dope them with a certain mass fraction of carbon black. Inject the ethanol dispersion of silica into a spray gun, spray it on a glass sheet to obtain a silica template with an amorphous structure; use polytetrafluoroethylene sheets of different thicknesses as a supporting frame, inject a polymer precursor into the template between two glass sheets, allow the precursor solution to penetrate into the gaps between the silica particles, polymerize under ultraviolet light to obtain a polymer film, and then etch the silica particles in the film with a diluted hydrofluoric acid solution to obtain a polymer film with an amorphous pore structure. Example 1
[0035] The dosimeter consists of a three-dimensional ordered structure composed of polymers. After the film is irradiated in a gamma radiation field, the radiation dose value it receives can be obtained by comparing it with a standard color card. As shown in the attached figure, as the absorbed dose increases, the color of the film changes from red to green and blue. A standard color card can be developed to compare with the film color to obtain the corresponding absorbed dose.
[0036] Example 2
[0037] The dosimeter consists of a three-dimensional ordered structure composed of polymers. After the film is irradiated in an electron beam radiation field, the radiation dose value it receives can be obtained by comparing it with a standard color card. As shown in the attached figure, as the absorbed dose increases, the color of the film changes from red to green and blue. A standard color card can be developed to compare with the film color to obtain the corresponding absorbed dose.
[0038] Example 3
[0039] The dosimeter is a three-dimensional ordered structure composed of polymers. After the film is irradiated with a proton beam, the radiation dose value can be obtained by comparing it with a standard color card. As shown in the attached figure, as the absorbed dose increases, the color of the film changes from red to green and blue. A standard color card can be developed to compare with the film color to obtain the corresponding absorbed dose.
[0040] Example 4
[0041] The dosimeter consists of a three-dimensional ordered structure composed of polymers. After the film is irradiated with a neutron beam, the radiation dose value it receives can be obtained by comparing it with a standard color card. As shown in the attached figure, as the absorbed dose increases, the color of the film changes from red to green and blue. A standard color card can be developed to compare with the film color to obtain the corresponding absorbed dose.
[0042] Example 5
[0043] The dosimeter consists of a three-dimensional ordered structure composed of polymers. After irradiating the film in a gamma radiation field, the radiation dose value received can be obtained by taking pictures and reading the color value. As shown in the attached figure, as the absorbed dose increases, the color of the film changes from red to green and blue. The film can be photographed and its color value can be read. It can be compared with the color value of the irradiated sample in the standard field to obtain the corresponding absorbed dose.
[0044] Example 6
[0045] The dosimeter consists of a three-dimensional ordered structure composed of polymers. After the film is irradiated in an electron beam radiation field, the radiation dose value received can be obtained by taking a photo and reading the color value. As shown in the attached figure, as the absorbed dose increases, the color of the film changes from red to green and blue. The film can be photographed and its color value can be read. It can be compared with the color value of the irradiated sample in the standard field to obtain the corresponding absorbed dose.
[0046] Example 7
[0047] The dosimeter consists of a three-dimensional ordered structure composed of polymers. After the film is irradiated with a proton beam, the radiation dose value it receives can be obtained by taking a photo and reading the color value. As shown in the attached figure, as the absorbed dose increases, the color of the film changes from red to green and blue. The film can be photographed and its color value can be read. It can then be compared with the color value of the irradiated sample in the standard field to obtain the corresponding absorbed dose.
[0048] Example 8
[0049] The dosimeter consists of a three-dimensional ordered structure composed of polymers. After the film is irradiated with a neutron beam, the radiation dose value received can be obtained by taking a photo and reading the color value. As shown in the attached figure, as the absorbed dose increases, the color of the film changes from red to green and blue. The film can be photographed and its color value can be read. It can be compared with the color value of the irradiated sample in the standard field to obtain the corresponding absorbed dose.
[0050] Example 9
[0051] The dosimeter consists of a three-dimensional ordered structure composed of polymers. After the film is irradiated in a gamma radiation field, the radiation dose value received can be obtained by measuring its spectral peak using a spectral measurement device. As shown in the attached figure, as the absorbed dose increases, the color of the film changes from red to green and blue. The corresponding spectrum of the film can be measured using a spectrometer and compared with the spectrum of the irradiated sample in a standard field to obtain the corresponding absorbed dose.
[0052] Example 10
[0053] The dosimeter consists of a three-dimensional ordered structure composed of polymers. After the film is irradiated in an electron beam radiation field, the radiation dose value received can be obtained by measuring its spectral peak using a spectral measurement device. As shown in the attached figure, as the absorbed dose increases, the color of the film changes from red to green and blue. The corresponding spectrum of the film can be measured using a spectrometer and compared with the spectrum of the irradiated sample in the standard field to obtain the corresponding absorbed dose.
[0054] Example 11
[0055] The dosimeter consists of a three-dimensional ordered structure composed of polymers. After the film is irradiated with a proton beam, the radiation dose value received can be obtained by measuring its spectral peak using a spectral measurement device. As shown in the attached figure, as the absorbed dose increases, the color of the film changes from red to green and blue. The corresponding spectrum of the film can be measured using a spectrometer and compared with the spectrum of the irradiated sample in the standard field to obtain the corresponding absorbed dose.
[0056] Example 12
[0057] The dosimeter consists of a three-dimensional ordered structure composed of polymers. After the film is irradiated with a neutron beam, the radiation dose value received can be obtained by measuring its spectral peak using a spectral measurement device. As shown in the attached figure, as the absorbed dose increases, the color of the film changes from red to green and blue. The corresponding spectrum of the film can be measured using a spectrometer and compared with the spectrum of the irradiated sample in the standard field to obtain the corresponding absorbed dose.
[0058] Example 13
[0059] The dosimeter consists of a disordered structure of stacked monodisperse microspheres composed of polymers. After the film is placed in a radiation field and irradiated, the radiation dose value it receives can be obtained by measuring its spectral peak using a spectral measurement device. As shown in the attached figure, as the absorbed dose increases, the color of the film changes from red to green and blue. The corresponding spectrum of the film can be measured using a spectrometer and compared with the spectrum of the irradiated sample in the standard field to obtain the corresponding absorbed dose.
[0060] Example 14
[0061] The dosimeter consists of a disordered structure of stacked monodisperse microspheres composed of polymers, with 1% carbon black added. After the film is placed in a radiation field and irradiated, the radiation dose value it receives can be obtained by measuring its spectral peak using a spectral measurement device. As shown in the attached figure, as the absorbed dose increases, the color of the film changes from red to green and blue. The corresponding spectrum of the film can be measured using a spectrometer and compared with the spectrum of the irradiated sample in the standard field to obtain the corresponding absorbed dose.
[0062] Example 15
[0063] The dosimeter consists of a disordered structure of monodisperse microspheres stacked together by a polymer, with 5% carbon black added. After the film is placed in a radiation field and irradiated, the radiation dose value received can be obtained by measuring its spectral peak using a spectral measurement device. As shown in the attached figure, as the absorbed dose increases, the color of the film changes from red to green and blue. The corresponding spectrum of the film can be measured using a spectrometer and compared with the spectrum of the irradiated sample in the standard field to obtain the corresponding absorbed dose.
[0064] Example 16
[0065] The dosimeter consists of a disordered structure of monodisperse microspheres composed of polymers and 10% carbon black is added. After the film is placed in a radiation field and irradiated, its spectral peak is measured by a spectral measurement device to obtain the radiation dose value it receives. As shown in the attached figure, as the absorbed dose increases, the color of the film changes from red to green and blue. The corresponding spectrum of the film can be measured using a spectrometer and compared with the spectrum of the irradiated sample in the standard field to obtain the corresponding absorbed dose.
[0066] Example 17
[0067] A photoinitiator with a mass fraction of 1% of the hydrogel is added to a 20% by mass methacrylate hydrogel with a degree of substitution of 44%. The mixture is then evenly mixed and injected between two glass sheets with a silica photonic crystal template so that the template is fully immersed in the gaps between the photonic crystal particles. Ultraviolet light is then used for polymerization for 30 minutes to obtain a polymer film. The polymer film is then immersed in a 10% by volume hydrofluoric acid aqueous solution, and the silica particles are etched to obtain a polymer film with structural color. The film is then placed in a radiation field and irradiated with different doses. The spectrum of the film after irradiation is measured to obtain its radiation dose.
[0068] The above embodiments describe the embodiments of the present invention, but the present invention is not limited to the above specific implementation methods. The above specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which are all protected by the present invention.
Claims
1. An ionizing radiation dose meter made of a polymer structural color material, characterized in that: The dosimeter is a single layer or multiple layers of polymer structural color material film; The polymer structural color material is a three-dimensional ordered structure composed of polymers or a disordered structure composed of stacked monodisperse microspheres composed of polymers; The three-dimensional ordered structure composed of the polymer is an artificial periodic polymer dielectric structure with a two-dimensional or three-dimensional periodic structure; The disordered structure of the monodisperse microspheres composed of the polymer is an amorphous structural color material formed by the disordered accumulation of spherical polymer microstructures with a monodisperse radius of 100-1000 nm, or the inverse structure of the spherical polymer microstructure; The polymer structural color material is a three-dimensional orderly stacked inverse opal structure, that is, a three-dimensional spherical hole structure of a close-packed structure; The polymer structural color material is a polymer formed by biological protein and polysaccharide and chemically modified thereof; The biosource protein is either directly applied or modified with additional double bonds in a methacrylated hydrogel; The disordered structure of the monodisperse microspheres composed of the polymer contains 0%-10% carbon black.
2. The ionizing radiation dosimeter according to claim 1, characterized in that: The thickness of the polymer structural color material film is 10-1000um.
3. The ionizing radiation dose meter according to claim 1 or 2, characterized in that: The polymer structure includes a hydrogel structure.
4. The method for measuring and reading an ionizing radiation dose meter according to claim 1, wherein: The specific steps are: After the dosimeter is exposed to a radiation field, an instrument is used to measure the reflection or absorption spectrum. The dose value of the ionizing radiation received by the dosimeter can be obtained by comparing it with a standard color card or taking a photo to read the color value or measuring its spectrum peak with a spectrum measuring device.
5. The method for measuring and reading an ionizing radiation dose meter according to claim 4, wherein: The measuring instrument used is a fiber optic spectrometer or a spectrophotometer.
6. The method for measuring and reading an ionizing radiation dose meter according to claim 4, wherein: The radiation field includes a neutron beam, a proton beam, an electron beam, an ion beam, an alpha, beta or gamma radiation field.