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Rare earth oxide nano-particle doped Mxene material for space charged particle radiation protection, composite coating and preparation method

A rare earth oxide and nanoparticle technology, applied in the field of radiation protection, can solve the problems of poor shielding performance of space charged particles and single protection, and achieve the effect of good shielding effect and wide application prospect.

Active Publication Date: 2022-01-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the shortcomings of the existing anti-radiation materials, which have poor shielding performance on space charged particles and single protection, and provide a preparation method of a radiation protection material with good shielding performance on space charged particles and good thermal stability

Method used

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  • Rare earth oxide nano-particle doped Mxene material for space charged particle radiation protection, composite coating and preparation method
  • Rare earth oxide nano-particle doped Mxene material for space charged particle radiation protection, composite coating and preparation method
  • Rare earth oxide nano-particle doped Mxene material for space charged particle radiation protection, composite coating and preparation method

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Embodiment 1

[0029] Embodiment 1: The preparation method of the rare earth oxide nanoparticles doped Mxene material used for space charged particle radiation protection in this embodiment is carried out in the following steps:

[0030] Preparation of Mxene materials by hydrofluoric acid etching

[0031] 4g of Ti 3 AlC 2 The powder was dispersed in 40 mL of HF solution with a volume concentration of 40%, and the dispersion was stirred at room temperature for 24 hours to remove the Al layer. The slurry was filtered and washed to remove all HF until pH ≈7. Then, the solution was freeze-dried for 24 hours to obtain Ti 3 C 2 T x .

[0032]Preparation of Mxene Doped with Rare Earth Oxide Nanoparticles

[0033] Add 100mL of 1mol / L gadolinium nitrate aqueous solution into 1gMxene and stir evenly, then add 20mL of ammonia water with a mass fraction of 25% and heat and stir, Gd 2 o 3 Nanoparticles are precipitated and uniformly dispersed on the surface between the Mxene layers, and the Mxen...

Embodiment 2

[0036] Embodiment 2: This embodiment differs from Embodiment 1 in that:

[0037] Preparation of Rare Earth Oxide Nanoparticle-doped Mxene Using Another Method

[0038] Via positively charged APTES-Gd 2 o 3 Electrostatic attraction with negatively charged Mxene nanosheets, prepared Gd 2 o 3 / Mxene Composite. Add excess Mxene suspension (100mL, 0.3mg / mL) to APTES-Gd 2 o 3 The dispersion (20 mL, 0.3 mg / mL) was sonicated under Ar flow for 1 h. Then, centrifuge at 3500 rpm for 1 h. Freeze-dried to get Gd 2 o 3 / Mxene Composite.

[0039] APTES-Gd 2 o 3 The preparation method and process parameters of the dispersion: the Gd 2 o 3 Disperse in 200ml of ethanol, sonicate for 30min, add 2ml of cationic surfactant APTES, reflux for 3h, cool to room temperature, wash with ethanol to remove unbound APTES, and vacuum dry the product at 40°C.

[0040] Other steps and parameters are the same as in Example 1.

Embodiment 3

[0041] Embodiment 3. In this embodiment, europium nitrate is used to replace gadolinium nitrate. Other steps and parameters are the same as in embodiment 1.

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Abstract

The invention discloses a rare earth oxide nano-particle doped Mxene material for space charged particle radiation protection, a composite coating and a preparation method, and belongs to the technical field of radiation protection. The invention aims to overcome the defects of poor shielding performance on space charged particles and single protection of an existing anti-radiation material. The rare earth oxide nanoparticle doped Mxene material is prepared by the following steps: adding an excessive amount of negatively charged Mxene suspension into an APTES-Gd2O3 dispersion, carrying out ultrasonic treatment under Ar flow, and then conducting centrifuging and freeze-drying to obtain the rare earth oxide nanoparticle doped Mxene material. According to the invention, the rare earth oxide is doped into the Mxene layer by using the two-dimensional layered structure of the Mxene and the high Z and high neutron absorption cross section of the rare earth oxide, so that high and low Z layered compounding is realized, and full protection is carried out through high Z shielding gamma rays, low Z shielding neutrons and high and low Z matching. The rare earth oxide nano-particle doped Mxene material is suitable for the fields of spacecrafts, nuclear reactors, nuclear protection, medical treatment and the like, and has very wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of radiation protection, and specifically relates to a rare earth oxide nanoparticle-doped Mxene material used for space charged particle radiation protection and a preparation method thereof; and a composite coating used for space charged particle radiation protection and Preparation. Background technique [0002] Radiation is used in power generation, medicine, research and industry. Radiation, especially ionizing radiation (neutrons, gamma, and X-rays), can harm living cells and their genetic material (DNA) if adequate safety precautions are not taken when using it. Therefore, radiation safety is very important to human life and the environment. Moreover, the spacecraft will encounter severe tests from various space radiation environments during its orbital operation, such as electrons, protons, heavy ions, photons, etc., which can cause single event effects and total dose effects on spacecraft material...

Claims

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Application Information

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IPC IPC(8): C09K3/00G21F1/02C09D163/00C09D7/61
CPCC09K3/00G21F1/02C09D163/00C09D7/61C08K2201/011C08K2003/221C08K3/14C08K3/22
Inventor 吴晓宏秦伟李杨卢松涛洪杨
Owner HARBIN INST OF TECH
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