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Bismuth tungstate/tungsten oxide/polymer composite nanofiber membrane for high-energy ray protection and preparation method of membrane

A composite nanofiber, high-energy ray technology, applied in chemical instruments and methods, special compound water treatment, fiber treatment, etc., can solve the problems of lead-containing high-energy ray protection materials that are bulky, affect radio communication, and nanoparticle agglomeration, etc. Application range and application potential, high practicality, comfortable wearing effect

Active Publication Date: 2019-11-12
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a bismuth tungstate / tungsten oxide / polymer composite nanofiber film for high-energy ray protection and its preparation method to solve the problems of traditional lead-containing high-energy ray protection materials being bulky, serious pollution in the production process and lead-free high-energy ray In the use of protective materials, there are problems such as agglomeration of nanoparticles, difficulty in recycling, electromagnetic shielding effect affecting radio communication, etc., so as to maximize the role of rare heavy nuclear metal element compounds and improve their practicability

Method used

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  • Bismuth tungstate/tungsten oxide/polymer composite nanofiber membrane for high-energy ray protection and preparation method of membrane
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  • Bismuth tungstate/tungsten oxide/polymer composite nanofiber membrane for high-energy ray protection and preparation method of membrane

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Experimental program
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Effect test

Embodiment 1

[0036] (1) Dissolve 7mmol sodium tungstate and 3.5mmol sodium sulfate in 40mL deionized water, adjust the pH to 2 with a 2mol / L HCl solution, then put it into a closed hydrothermal reactor and react for 12h at 180℃, and cool to After room temperature, filter the obtained solid product through ultrasonic crushing and centrifugation to screen nanorods with a diameter of less than 100nm and a length of less than 4μm, washing with water and ethanol, and drying to obtain tungsten oxide nanorod seeds;

[0037] (2) Mix polyacrylonitrile, tungsten oxide nanorod seeds, and N,N-dimethylformamide at a mass ratio of 1:0.25:10.75 and stir for 12h. After the polyacrylonitrile is dissolved, ultrasonic treatment is performed for 30min to make the nanorods in Disperse uniformly in the system to obtain an electrostatic spinning precursor suspension;

[0038] (3) Put the electrospinning precursor suspension into the syringe of the electrospinning equipment, the diameter of the stainless steel needle ...

Embodiment 2

[0044] (1) Dissolve 7mmol sodium tungstate and 3.5mmol sodium sulfate in 40mL deionized water, use 2mol / L HCl solution to adjust the pH to 2 and then put it into a closed hydrothermal reactor, react at 180℃ for 12h, and cool naturally. After reaching room temperature, filter the obtained solid product through ultrasonic crushing and centrifugation to screen nanorods with a diameter of less than 100nm and a length of less than 4μm, washing with water and ethanol, and drying to obtain tungsten oxide nanorod seeds;

[0045] (2) Mix polyacrylonitrile, tungsten oxide nanorod seeds, and N,N-dimethylformamide at a mass ratio of 1:0.25:10.75, then stir for 12h to dissolve the polyacrylonitrile, and then ultrasonically treat for 30min to make the nanorods Disperse uniformly in the system to obtain an electrostatic spinning precursor suspension;

[0046] (3) Put the electrospinning precursor suspension into the syringe of the electrospinning equipment, the diameter of the stainless steel nee...

Embodiment 3

[0052] (1) Dissolve 7mmol sodium tungstate and 3.5mmol sodium sulfate in 40mL deionized water, use 2mol / L HCl solution to adjust the pH to 2 and then put it into a closed hydrothermal reactor, react at 180℃ for 12h, and cool naturally. After reaching room temperature, filter the obtained solid product through ultrasonic crushing and centrifugation to screen nanorods with a diameter of less than 100nm and a length of less than 4μm, washing with water and ethanol, and drying to obtain tungsten oxide nanorod seeds;

[0053] (2) Mix polyacrylonitrile, tungsten oxide nanorod seeds, and N,N-dimethylformamide at a mass ratio of 1:0.25:10.75, then stir for 12h to dissolve the polyacrylonitrile, and then ultrasonically treat for 30min to make the nanorods Disperse uniformly in the system to obtain an electrostatic spinning precursor suspension;

[0054] (3) Put the electrospinning precursor suspension into the syringe of the electrospinning equipment, the diameter of the stainless steel nee...

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Abstract

The invention discloses a bismuth tungstate / tungsten oxide / polymer composite nanofiber membrane for high-energy ray protection and a preparation method of the membrane, and belongs to the technical field of ray protection material preparation. Firstly, a tungsten oxide nanorod seed crystal is prepared by hydrothermal synthesis, secondly, the tungsten oxide nanorod seed crystal is mixed with polymer solution to prepare electrospinning precursor solution, the nanofiber membrane is prepared by an electrostatic spinning process, and then a flexible heterogeneous composite nanofiber is prepared bya subsequent two-step hydrothermal process. Owing to physicochemical properties of tungsten and bismuth oxide and structural characteristics of nanofibers, the nanofiber membrane has high protective effects on X and gamma rays and can keep low density, a continuous nanofiber material solves the problem of agglomeration of powder materials, interference of electromagnetic shielding effects in radiocommunication is avoided by introduction of non-conductive materials, the nanofiber membrane can be used for photocatalytic degradation of organic pollutants after the life cycle of the nanofiber membrane serving as a high-energy ray protection is ended, and the nanofiber membrane is a novel nano-material with a good application prospect.

Description

Technical field [0001] The invention belongs to the technical field of preparation of radiation protection materials, and in particular relates to a green environmental protection bismuth tungstate / tungsten oxide / polymer composite nanofiber membrane for high-energy radiation protection and a preparation method thereof. Background technique [0002] X-ray (λ=0.001~100nm) and γ-ray (λ <0.001nm) are electromagnetic waves with very short wavelengths, which mainly exhibit particle properties when interacting with matter, and are called high-energy rays. With the rapid development of many fields such as medical imaging, interventional radiology, nuclear power and aerospace, people have more and more opportunities to be exposed to high-energy rays, and long-term exposure to them has proved harmful to the human body. The existing high-energy rays are shielded The materials are mainly lead plates and lead-containing vulcanized rubber. Lead has strong scattering of low-energy rays in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D01D5/00C02F1/30D06M11/48D06M101/28
CPCC02F1/30C02F2305/10D01D5/003D01D5/0061D04H1/728D06M11/48D06M2101/28
Inventor 王策何大勇马棫滢邱菊金昌显
Owner JILIN UNIV
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