Preparation method of anti-radiation biomimetic membrane

A radiation protection and film technology, applied in the field of preparation of radiation protection bionic films, can solve the problems of poor mechanical properties, migration out, no radiation protection performance, etc., and achieve high strength and radiation protection characteristics, simple methods, and excellent toughness. Effect

Active Publication Date: 2016-09-07
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the past, the anti-radiation filling material used in radiation protection equipment such as gloves, clothes, hats, etc. was PbO, which has a certain protective effect on gamma rays, but PbO cannot be firmly combined with the material of the protective equipment, and it is easy to migrate out of such products. Cause secondary harm to human body and environment
At present, WO is widely used at home and abroad 3 Instead of PbO, although this avoids PbO from moving out from the radiation protection equipment, WO 3 The anti-radiation performance of PbO is not as good as that of PbO. Such appliances have very low protection against γ-rays. For example, the shielding efficiency of 59.5keV γ-rays is generally around 8%-11%. At the same time, their mechanical properties are poor, and their tensile strength Only 4-6MPa, the tensile elongation at break is 500% to 700%, PbWO in recent years 4 As a new type of filling material, PbWO has attracted widespread attention from scholars. 4 It has excellent shielding effect on rays and can be used as a new type of shielding material with high quality

Method used

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Examples

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Effect test

Embodiment 1

[0030] A preparation method of a radiation-proof biomimetic film, comprising the following steps:

[0031] Step 1. Stir 2g of sodium-based montmorillonite into 300g of deionized water, then stir at 3000r / min for 6 days to peel off the sodium-based montmorillonite into single-layer nanosheets; the stripped mixed solution is subjected to 3000r / min× Centrifuge for 10min, take the supernatant to obtain the clay solution; stir 3g chitosan into the mixture of 300g deionized water and 3g glacial acetic acid, stir at room temperature at a speed of 3000r / min for 24 hours, then let it stand for 24 hours , get the supernatant to obtain the chitosan solution;

[0032] Step 2, get 200mL of chitosan solution prepared in step 2, under stirring at 500r / min, add 200mL of equal volume of clay solution dropwise at a rate of 5g / min. Stir at a speed of min for 12 hours to allow chitosan molecules to adsorb on the surface of the sodium-based montmorillonite nanosheets. After the adsorption reactio...

Embodiment 2

[0037] A preparation method of a radiation-proof biomimetic film, comprising the following steps:

[0038] Step 1. Stir 4g of sodium-based montmorillonite into 500g of deionized water, then stir at 5000r / min for 8 days to peel off the sodium-based montmorillonite into single-layer nanosheets; the stripped mixed solution is subjected to 3000r / min× Centrifuge for 10min, take the supernatant to obtain the clay solution; stir 6g of chitosan into the mixture of 500g of deionized water and 6g of glacial acetic acid, stir at room temperature at a speed of 5000r / min for 24 hours, then let stand for 24 hours , get the supernatant to obtain the chitosan solution;

[0039] Step 2, get 500mL of the chitosan solution prepared in step 2, under the stirring of 500r / min, dropwise add 500mL of equal volume of clay solution at a rate of 10g / min, seal after the addition is completed, Stir at a speed of min for 12 hours to allow chitosan molecules to adsorb on the surface of the sodium-based mon...

Embodiment 3

[0044] A preparation method of a radiation-proof biomimetic film, comprising the following steps:

[0045] Step 1. Stir 3g of sodium-based montmorillonite into 400g of deionized water, then stir at 4000r / min for 7 days to peel off the sodium-based montmorillonite into single-layer nanosheets; the stripped mixed solution is subjected to 3000r / min× Centrifuge for 10min, take the supernatant to obtain the clay solution; stir 5g chitosan into the mixture of 400g deionized water and 5g glacial acetic acid, stir at room temperature at a speed of 4000r / min for 24 hours, then let it stand for 24 hours , get the supernatant to obtain the chitosan solution;

[0046] Step 2, get 300mL of chitosan solution prepared in step 2, under stirring at 500r / min, add 300mL of equal volume of clay solution dropwise at a rate of 8g / min, seal after the addition is completed, Stir at a speed of min for 12 hours to allow chitosan molecules to adsorb on the surface of the sodium-based montmorillonite na...

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Abstract

The invention discloses a preparation method of an anti-radiation biomimetic membrane. The preparation method of the anti-radiation biomimetic membrane comprises the following steps: sodium-based montmorillonite nano-plates are taken as 'bricks', chitosan molecules are taken as 'mud', the chitosan molecules are absorbed onto the surfaces of the sodium-based montmorillonite nano-plates through electrostatic adsorption and hydrogen-bond interaction so as to form sodium-based montmorillonite and chitosan hybridized nano-plates, lead tungstate nano-particles are directly decorated on the sodium-based montmorillonite and chitosan hybridized nano-plates, and a montmorillonite and chitosan biomimetic laminated structure hybridized membrane containing the lead tungstate nano-particles can be obtained through vacuum filtration and self assembly. The anti-radiation biomimetic membrane prepared by the invention has a pearl mother imitated structure, the lead tungstate is distributed on the biomimetic membrane better, the membrane has the characteristics of relatively high intensity and radiation resistance, and is excellent in toughness, and the preparation method of the membrane is simple and high in efficiency.

Description

technical field [0001] The invention relates to the technical field of bionic films, in particular to a method for preparing a radiation-proof bionic film. Background technique [0002] Nowadays, with the deepening of the application of various rays, how to effectively and conveniently shield all kinds of harmful rays has become a research hotspot in recent years. The main sources of radiation in contemporary society are medical exposure, nuclear power production, nuclear explosions, cosmic rays, protocosmogenic radionuclides, etc. At present, the main protection methods include time protection, distance protection and shielding protection. Time protection is to reduce the contact time with radioactive sources, make plans in advance, consider various factors as much as possible to optimize the experiment, and reduce contact with radioactive sources. contact time. Distance protection is based on the fact that the dose rate is proportional to the square of the distance, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/08C08K9/00C08K3/34C08K3/24C08J5/18D04H1/728D01D5/00D01D1/02
CPCC08J5/18C08J2305/08C08K3/24C08K3/346C08K9/00C08K2201/011C08L2203/16D01D1/00D01D5/0015D04H1/728C08L5/08
Inventor 竹文坤段涛姚卫棠王茜雷佳周建
Owner SOUTHWEAT UNIV OF SCI & TECH
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