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Preparation method of core-shell structure tungsten/gadolinium oxide PU coated fabric for X and gamma ray protection

A core-shell structure and gadolinium oxide technology, applied in the X field, can solve the problems of long time-consuming 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 core-shell structure tungsten/gadolinium oxide PU coated fabric for X and gamma ray protection

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Experimental program
Comparison scheme
Effect test

Embodiment １

[0033] This embodiment provides a method for preparing a core-shell structure tungsten / gadolinium oxide PU coating fabric for X, gamma ray protection, the method comprising the following steps:

[0034] (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;

[0035](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.

[0036] (3) The core-shell structure W@Gd obtained in step (2) 2 o 3 The powder is...

Embodiment ２

[0039] This embodiment provides a method for preparing a core-shell structure tungsten / gadolinium oxide PU coating fabric for X, gamma ray protection, the method comprising the following steps:

[0040] (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;

[0041] (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.

[0042] (3) The core-shell structure W@Gd obtained in step (2) 2 ...

Embodiment ３

[0044] This embodiment provides a method for preparing a core-shell structure tungsten / gadolinium oxide PU coating fabric for X, gamma ray protection, the method comprising the following steps:

[0045] (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;

[0046] (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.

[0047] (3) The core-shell structure W@Gd obtained in step (2) 2 o 3 The powder was added to dimethylacetamide fo...

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Abstract

The invention relates to a preparation method of a core-shell structure tungsten / gadolinium oxide PU coated fabric for X and gamma ray protection. The method comprises the following steps of preparing a dopamine salt solution, adding a buffer solution to adjust the pH value, then adding tungsten powder, stirring, filtering, washing and drying to obtain W-coated PDA; adding the obtained W-coated PDA into a gadolinium nitrate solution, stirring, filtering, and carrying out high-temperature calcination to obtain core-shell structure W-coated Gd2O3 powder; and adding the W-coated Gd2O3 powder into dimethylacetamide, adding a certain amount of polyurethane resin adhesive, uniformly stirring, coating the fabric, and drying. According to the preparation method, W-coated PDA is firstly prepared because PDA has extraordinary adhesiveness on the surfaces of different substances, after tungsten is coated, the surface of PDA further contains a large number of phenolic hydroxyl groups, amino groups and other polar groups, rich active sites are provided for complexing Gd <+>, and a nitrogen-doped carbon layer is formed after high-temperature calcination. Compared with a single metal physical blending mode, the core-shell structure can play a synergistic protection role in radiation protection, and secondary radiation generated by radiation is effectively absorbed while a weak protection area is eliminated. The PU resin coated fabric is relatively excellent in wearability and mechanical property, and the W-coated Gd2O3 powder is good in dispersity in the PU resin, so that the final protective property of the coated fabric is more excellent.

Description

technical field [0001] The invention relates to the field of preparing radiation-proof materials, in particular to a method for preparing a core-shell structure tungsten / gadolinium oxide PU coating fabric 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, mic...

Claims

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Application Information

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IPC IPC(8): D06N3/14D06N3/00
CPCD06N3/14D06N3/0061D06N3/0063D06N2209/16
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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