Preparation method of non-woven fabric for X-ray and gamma-ray protection

A non-woven, gamma ray technology, applied in the field of radiation protection, can solve the problems of long time and many processes

Active Publication Date: 2021-06-04
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 non-woven fabric for X-ray and gamma-ray protection

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Experimental program
Comparison scheme
Effect test

Embodiment １

[0054] This embodiment provides a method for preparing a non-woven fabric for protection against X and gamma rays, the method comprising the following steps:

[0055] (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;

[0056] (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.

[0057] (3) The core-shell structure W@Gd obtained in step (2) 2 o 3 The powder and the dried PP masterbatch are adde...

Embodiment ２

[0066] This embodiment provides a method for preparing a non-woven fabric for protection against X and gamma rays, the method comprising the following steps:

[0067] (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;

[0068] (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.

[0069] (3) The core-shell structure W@Gd obtained in step (2) 2 o 3 The powder and the dried PP mas...

Embodiment ３

[0077] This embodiment provides a method for preparing a non-woven fabric for protection against X and gamma rays, the method comprising the following steps:

[0078](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;

[0079] (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 at 1000°C for 3h under nitrogen gas (heating rate 4°C / min), and finally got the core-shell structure W@Gd 2 o 3 powder.

[0080] (3) The core-shell structure W@Gd obtained in step (2) 2 o 3 The powder and the dried PP masterbatch are added to the feeding port of the scre...

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Abstract

The invention provides a preparation method of core-shell structure tungsten/gadolinium oxide PP non-woven fabric for X-ray and gamma-ray protection. The preparation method comprises the following steps: firstly, preparing core-shell structure tungsten/gadolinium oxide powder; preparing a W (at) Gd2O3/PP blended melt according to the powder; then preparing a W-coated Gd2O3/PP composite fiber according to the blended melt; and finally, preparing the W-coated Gd2O3/PP composite non-woven material according to the composite fibers. The core-shell structure tungsten/gadolinium oxide PP non-woven fabric prepared according to the method can play a synergistic protection role in radiation protection, and secondary radiation generated by radiation can be effectively absorbed while weak protection areas are eliminated. Secondly, the prepared functional non-woven fabric 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] The present application relates to the field of radiation protection, in particular to a preparation method of a non-woven fabric for protection against X and gamma rays. 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 core-shell materials with special...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21J3/12
CPCD21J3/12
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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