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CN-122011464-A - X-ray composite radiation shielding material and preparation method and application thereof

CN122011464ACN 122011464 ACN122011464 ACN 122011464ACN-122011464-A

Abstract

The invention provides an X-ray composite radiation shielding material, a preparation method and application thereof, and belongs to the technical field of radiation protection. The invention uses the high atomic number element contained in the metal oxide to obviously enhance the photoelectric effect and scattering effect of X-rays in the material, thereby effectively reducing the transmittance of the X-rays. Meanwhile, the oxide material has good chemical stability and environmental friendliness, and the advantages of toxicity, ageing and the like brought by the traditional lead-based shielding material can be avoided. The composite radiation shielding material prepared by the invention has the advantages of low cost, light weight, easy processing, good flexibility, no toxicity, environmental protection and the like, and the shielding efficiency of the X-ray shielding coating is as high as more than 70 percent below 70kV of X-ray photon energy, and the secondary reflection ratio can be reduced by 35-80 percent compared with lead.

Inventors

  • JIN ZHIWEN
  • CHAI FEIFEI
  • Xu Youkui
  • Di Miaomiao
  • ZHAO SIYING

Assignees

  • 兰州大学

Dates

Publication Date
20260512
Application Date
20260213

Claims (10)

  1. 1. The preparation method of the X-ray composite radiation shielding material is characterized by comprising the following steps of: mixing metal oxide with a high molecular polymer and a dispersion solvent to obtain a mixed solution; And depositing the mixed solution on a substrate, and performing annealing treatment to obtain the X-ray composite radiation shielding material.
  2. 2. The method of claim 1, wherein the metal oxide comprises one or more of aluminum oxide, calcium oxide, zinc oxide, tin oxide, antimony oxide, barium oxide, tungsten oxide, bismuth oxide, lanthanum oxide, cerium oxide, europium oxide, and gadolinium oxide.
  3. 3. The production method according to claim 1 or2, wherein the high molecular polymer comprises one or more of thermoplastic vulcanized rubber, thermoplastic elastomer, sodium carboxymethyl cellulose, polymethyl methacrylate, polyurethane, thermoplastic polyurethane, polyvinyl alcohol, polyimide, polyvinylpyrrolidone, ethylene-vinyl acetate copolymer, hydrogenated styrene-butadiene block copolymer, polyvinylidene fluoride, and polydimethylsiloxane; The mass ratio of the high polymer to the metal oxide is 1-11:4-10.
  4. 4. The preparation method of the metal oxide-containing dispersion liquid according to claim 1 or 2, wherein the dispersion solvent comprises one or more of water, methanol, ethanol, N-butanol, toluene, dimethyl sulfoxide, N-dimethylformamide, isopropanol, acetone, dichloromethane and ethyl acetate, and the dosage ratio of the metal oxide to the dispersion solvent is 1 g:5-20 mL.
  5. 5. The method of claim 1, wherein the depositing comprises one or more of spin coating, knife coating, filling coating, and spray coating.
  6. 6. The method of manufacturing according to claim 1 or 5, wherein the substrate comprises one or more of natural rubber, leather, glass, non-woven fabric, and plastic.
  7. 7. The method according to claim 1, wherein the annealing treatment is performed at a temperature of 40-120 ℃ for 60-360 min.
  8. 8. The method according to claim 1 or 7, wherein the thickness of the barrier coating formed on the substrate after the annealing treatment is 0.15 to 0.5mm.
  9. 9. The X-ray composite radiation shielding material prepared by the preparation method of any one of claims 1-8.
  10. 10. Use of the X-ray composite radiation shielding material according to claim 9 for X-ray shielding.

Description

X-ray composite radiation shielding material and preparation method and application thereof Technical Field The invention relates to the technical field of radiation protection, in particular to an X-ray composite radiation shielding material and a preparation method and application thereof. Background X-rays are electromagnetic waves with extremely high frequency, extremely short wavelength and very high energy, and have the ability to penetrate various substances. As a common ionizing radiation, high-energy ionizing radiation has been widely used in the fields of medical imaging, nuclear facilities, industrial flaw detection, aerospace and the like along with the development of modern science, technology and socioeconomic performance. However, exposure to radiation with high energy and high penetration can be potentially harmful to the human body due to the high energy of X-rays. This is because the high-energy ionizing radiation acts on the living body to change the cell molecules, thereby damaging them. Therefore, in order to reduce the damage from ionizing radiation, it is desirable to protect against radiation with an effective radiation shielding material. At present, the conventional radiation shielding materials commonly used mainly comprise lead plates, lead glass, barium sulfate, concrete and the like. However, although the shielding material has higher radiation attenuation capability, the shielding material still has a plurality of limitations in practical application, such as high processing difficulty, poor material uniformity, insufficient flexibility, easy cracking, limited durability, potential toxicity and the like, and is difficult to meet the development requirements of light weight and environmental protection. In recent years, composite radiation shielding materials based on polymer materials have been attracting attention, and the absorption of X-rays can be achieved by incorporating high atomic number inorganic fillers into the polymer matrix. However, the dispersion characteristics between different inorganic fillers and a polymer matrix are greatly different, so that uneven dispersion (agglomeration) and poor flexibility (powder particles float on the surface) of the fillers are easily caused, and the shielding property and mechanical property of the material are affected. Meanwhile, part of polymer matrix materials still have the defects in terms of environmental friendliness and sustainability. Therefore, a radiation shielding material which has the characteristics of low cost, light weight, easy processing, good flexibility, no toxicity, environmental protection and the like while ensuring the X-ray shielding performance is needed to have important research significance and application value. Disclosure of Invention The invention aims to provide a composite radiation shielding material, a preparation method and application thereof, and the composite radiation shielding material improves the comprehensive performance and environmental friendliness of the material while improving the X-ray shielding performance by reasonably combining an inorganic metal oxide shielding material with an environment-friendly high polymer matrix material. In order to achieve the above object, the present invention provides the following technical solutions: The invention provides a preparation method of an X-ray composite radiation shielding material, which comprises the following steps: mixing metal oxide with a high molecular polymer and a dispersion solvent to obtain a mixed solution; And depositing the mixed solution on a substrate, and performing annealing treatment to obtain the X-ray composite radiation shielding material. Preferably, the metal oxide includes one or more of aluminum oxide, calcium oxide, zinc oxide, tin oxide, antimony oxide, barium oxide, tungsten oxide, bismuth oxide, lanthanum oxide, cerium oxide, europium oxide, and gadolinium oxide. Preferably, the high molecular polymer comprises one or more of thermoplastic vulcanizate (TPV), thermoplastic elastomer (TPE), sodium carboxymethyl cellulose (CMC), polymethyl methacrylate (PMMA), polyurethane (PU), thermoplastic Polyurethane (TPU), polyvinyl alcohol (PVA), polyimide (PI), polyvinylpyrrolidone (PVP), ethylene-vinyl acetate copolymer (EVA), hydrogenated styrene-butadiene block copolymer (SEBS), polyvinylidene fluoride (PVDF) and Polydimethylsiloxane (PDMS); The mass ratio of the high polymer to the metal oxide is 1-11:4-10. Preferably, the dispersing solvent comprises one or more of water, methanol, ethanol, N-butanol, toluene, dimethyl sulfoxide, N-dimethylformamide, isopropanol, acetone, methylene dichloride and ethyl acetate, and the dosage ratio of the metal oxide to the dispersing solvent is 1 g:5-20 mL. Preferably, the deposition means includes one or more of spin coating, knife coating, filling coating and spray coating. Preferably, the substrate comprises one or more of natural rubber, leather, glass, non-woven fabric