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Preparation method of core-shell structure tungsten/gadolinium oxide PVC calendered material for X-ray and gamma-ray protection

A core-shell structure and rolling material technology, applied in the field of X, can solve the problems of long time and many processes.

Active Publication Date: 2021-05-25
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have disadvantages such as many processes and long time consumption, so it is necessary to specify an effective and simple method to overcome these defects

Method used

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  • Preparation method of core-shell structure tungsten/gadolinium oxide PVC calendered material for X-ray and gamma-ray protection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0047] This embodiment provides a method for preparing a core-shell structure tungsten / gadolinium oxide PVC rolling material for X, gamma ray protection, the method comprising the following steps:

[0048] (1) Prepare a dopamine salt solution with a concentration of 2g / L, add tris buffer to adjust the pH value of the solution to 8.5, then add tungsten powder cleaned with ethanol, stir with an electric stirrer for 24 hours, filter and separate, and then use deionized water respectively After washing twice with ethanol, dry at 80°C for 5 hours to obtain W@PDA;

[0049] (2) Add W@PDA obtained in step (1) to 0.3M / L gadolinium nitrate solution, stir magnetically for 2 hours, filter and separate, dry at 80°C for 5 hours, and then dry the prepared sample at 800°C Calcined at high temperature under nitrogen for 2h (heating rate 2°C / min), and finally obtained the core-shell structure W@Gd 2 o 3 powder.

[0050] (3) Evenly disperse the core-shell structure tungsten / gadolinium oxide p...

Embodiment ２

[0057] This embodiment provides a method for preparing a core-shell structure tungsten / gadolinium oxide PVC rolling material for X, gamma ray protection, the method comprising the following steps:

[0058] (1) Prepare a dopamine salt solution with a concentration of 1.5g / L, add tris buffer to adjust the pH value of the solution to 8, then add tungsten powder cleaned with ethanol, stir with an electric stirrer for 20 hours, filter and separate, and then use deionized After washing with water and ethanol for 3 times, it was dried at 60°C for 8 hours to obtain W@PDA;

[0059] (2) Add the W@PDA obtained in step (1) into a 0.35M / L gadolinium nitrate solution, stir magnetically for 3 hours, filter and separate, dry at 60°C for 8 hours, and then dry the prepared sample at 900°C Calcined at high temperature under nitrogen for 2.5h (heating rate 3°C / min), and finally obtained the core-shell structure W@Gd 2 o 3 powder.

[0060] (3) Evenly disperse the core-shell structure tungsten / g...

Embodiment ３

[0066] This embodiment provides a method for preparing a core-shell structure tungsten / gadolinium oxide PVC rolling material for X, gamma ray protection, the method comprising the following steps:

[0067] (1) Prepare a dopamine salt solution with a concentration of 2.5g / L, add tris buffer to adjust the pH value of the solution to 9, then add tungsten powder cleaned with ethanol, stir with an electric stirrer for 18 hours, filter and separate, and then use deionized After washing twice with water and ethanol, dry at 70°C for 6 hours to obtain W@PDA;

[0068](2) Add W@PDA obtained in step (1) to 0.4M / L gadolinium nitrate solution, stir magnetically for 2.5h, filter and separate, dry at 70°C for 6h, and then place the prepared sample in Calcined under nitrogen at 1000°C for 3 hours (heating rate 4°C / min), and finally obtained the core-shell structure W@Gd 2 o 3 powder.

[0069] (3) Evenly disperse the core-shell structure tungsten / gadolinium oxide powder obtained in step (2) ...

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Abstract

The invention relates to a preparation method of a core-shell structure tungsten / gadolinium oxide PVC calendered material for X-ray and gamma-ray protection. The preparation method comprises the following steps: firstly, preparing core-shell structure tungsten / gadolinium oxide powder; and preparing the core-shell structure tungsten / gadolinium oxide PVC calendered material from the powder. The core-shell structure tungsten / gadolinium oxide powder is uniformly smeared on a polyester imine film, the core-shell structure tungsten / gadolinium oxide powder is melted into a core-shell structure tungsten / gadolinium oxide thin skin layer after high-temperature hot pressing, the core-shell structure tungsten / gadolinium oxide powder is added into PVC resin and uniformly mixed with the PVC resin, the mixture is sprayed on the surface of the core-shell structure tungsten / gadolinium oxide thin skin layer, after drying, the fabric is rolled and formed through a roller of a calendaring machine, and a lead-free light X-ray and gamma-ray protection material is prepared. The X-ray and gamma-ray protection material can play a synergistic protection role in radiation protection, eliminate a weak protection area and effectively absorb secondary radiation generated by radiation at the same time. The functional material has the characteristics of no lead and light weight, and has a good application prospect in the aspect of X-ray and gamma-ray radiation protection.

Description

technical field [0001] This application relates to the field of radiation protection, in particular to a method for preparing a core-shell structure tungsten / gadolinium oxide PVC rolling material for X and gamma ray protection. Background technique [0002] While the development of nuclear technology has brought convenience to people, it has also produced a lot of radiation hazards. Lightweight, flexible and excellent radiation protection textiles are the hotspots of current research. Radiation protection materials are mainly divided into leaded materials and lead-free materials. Lead is mainly lead. Although the protective effect is excellent, it is toxic, has poor strength, and has a large scattering of low-energy X-rays. Lead-free materials mainly include composite materials made of rare earth elements and heavy metal compounds such as tin, tungsten, and bismuth, which have excellent protective effects and are lightweight and safe. [0003] In recent years, micro-nano...

Claims

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Application Information

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IPC IPC(8): C08J7/04C08J7/06C08L79/08C09D1/00C09D127/06C09D5/32C09D7/62B05D7/04
CPCC08J7/0423C08J7/06C09D1/00C09D127/06C09D5/32C09D7/62B05D7/04C08J2379/08C08J2427/06C08K2003/0887C08K2003/221C08K9/10C08K9/06C08K3/08C08K3/04C08K3/22
Inventor 姚理荣夏勇杨涛孙通潘刚伟徐思峻季涛高强
Owner NANTONG UNIVERSITY
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