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A kind of wave-absorbing material for medical equipment

A technology of wave-absorbing materials and medical devices, applied in the field of functional polymer materials, can solve problems such as insufficient absorption rate, high amount of wave-absorbing agent, and poor low-frequency absorption performance, and achieve electromagnetic wave absorption frequency band and high absorption rate, mechanical Better performance and heat resistance, better mechanical properties and heat resistance

Active Publication Date: 2021-10-29
潍坊护理职业学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ferrite has a wide absorption frequency band and high absorption rate, but its high density makes the components too heavy, and the high-frequency effect is not ideal; metal iron powder has good temperature stability, but its anti-oxidation, acid and alkali resistance is poor, and low frequency The absorption performance is poor; the polycrystalline iron fiber has a low density, but the absorption rate is not high enough; acetylene carbon black can not only absorb electromagnetic waves, but also effectively inhibit infrared radiation, but has poor high temperature oxidation resistance; ceramic materials are resistant to high temperature, high strength, chemical Good stability, but the preparation process is more complicated; structural absorbing material, the preparation process is simple and mature, but it can only absorb electromagnetic waves of a specific frequency band, and the absorption frequency band is narrow
In addition, the wave-absorbing materials in the prior art still have a more or less high amount of wave-absorbing agent, which not only increases the density of the wave-absorbing material, but also increases the production cost. It is difficult to match the impedance, and it is difficult to It is made very thin, the absorbing range is limited, and the absorbing effect needs to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A wave-absorbing material for medical devices is prepared by the following preparation method:

[0033] Ⅰ Preparation of modifier: 1 kg of 2-(1,1,2,3,3,3-hexafluoropropyl) tetrahydrofuran, 0.1 kg of potassium tert-butylate, 5-bromo-2-(3,4- Add 1.12 kg of vinyldioxythiophene) formaldehyde to 8 kg of N,N-dimethylformamide, stir and react at -30°C for 2 hours, and then remove N,N-dimethylformaldehyde by rotary evaporation after the temperature returns to room temperature formamide, and then wash the product 3 times with acetone, and then rotary evaporate to remove residual acetone to obtain a modifier;

[0034]II Modification of polyaniline: Add 3kg of polyaniline to 10kg of N,N-dimethylacetamide, then add 1kg of the modifier prepared in step I, stir and react at 60°C for 6 hours, then Precipitate in acetone, wash the precipitated product with ethanol for 3 times, and then dry it in a vacuum oven at 60°C to constant weight to obtain modified polyaniline;

[0035] Prepara...

Embodiment 2

[0041] A wave-absorbing material for medical devices is prepared by the following preparation method:

[0042] Ⅰ Preparation of modifier: 1 kg of 2-(1,1,2,3,3,3-hexafluoropropyl) tetrahydrofuran, 0.15 kg of sodium hydride, 5-bromo-2-(3,4-vinylbis Add 1.12kg of oxythiophene) formaldehyde to 9kg of N,N-dimethylformamide, stir and react at -32°C for 2.3 hours, after the temperature returns to room temperature, remove N,N-dimethylformamide by rotary evaporation, Then wash the product 4 times with acetone, and then remove residual acetone by rotary evaporation to obtain a modifier;

[0043] II Modification of polyaniline: Add 3.5 kg of polyaniline to 11 kg of N,N-dimethylformamide, then add 1 kg of the modifier prepared in step I, and stir and react at 65°C for 6.5 hours. Then precipitate in acetone, wash the precipitated product with ethanol for 4 times, and then dry it in a vacuum oven at 65°C to constant weight to obtain modified polyaniline;

[0044] Preparation of Ⅲ addition...

Embodiment 3

[0050] A wave-absorbing material for medical devices is prepared by the following preparation method:

[0051] Ⅰ Preparation of modifier: 1 kg of 2-(1,1,2,3,3,3-hexafluoropropyl) tetrahydrofuran, 0.2 kg of lithium boride, 5-bromo-2-(3,4-ethylene Add 1.12kg of N,N-dimethylformamide to 10kg of N,N-dimethylformamide, stir and react at -35°C for 2.5 hours, after the temperature returns to room temperature, remove N,N-dimethylformamide by rotary evaporation Amide, then wash the product 4 times with acetone, and then remove the residual acetone by rotary evaporation to obtain a modifier;

[0052] II Modification of polyaniline: Add 4kg of polyaniline to 13kg of N-methylpyrrolidone, then add 1kg of modifier prepared through step I, stir and react at 70°C for 7 hours, and then precipitate in acetone , and the precipitated product was washed with ethanol for 4 times, and then dried in a vacuum oven at 70°C to constant weight to obtain modified polyaniline;

[0053] Preparation of Ⅲ a...

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PUM

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Abstract

The invention discloses a wave-absorbing material for medical equipment, which is prepared by the following preparation methods: (1) preparation of a modifying agent, (2) modification of polyaniline, (3) preparation of an addition polymer, (4) ) Preparation of magnetic wave-absorbing active ingredients, (5) Surface treatment of magnetic wave-absorbing active ingredients, (6) Forming of wave-absorbing materials. The wave-absorbing material for medical devices prepared by the present invention overcomes the technical problems that the traditional wave-absorbing material has a limited wave-absorbing range and the wave-absorbing effect needs to be further improved, and has the advantages of high electromagnetic wave absorption frequency band and absorption rate, compatibility, mechanical properties and The advantage of better heat resistance.

Description

technical field [0001] The invention relates to the technical field of functional polymer materials, in particular to a wave-absorbing material for medical equipment. Background technique [0002] With the development of science and technology and the electronic industry, more and more electromagnetic radiation exists around us, and the impact on the environment is increasing. Excessive electromagnetic radiation can cause damage to the nervous system, immune system, reproductive system and blood circulation system, etc. In addition to the occurrence of obstacles, it may even induce serious diseases including various types of cancer. Long-term exposure to the electromagnetic wave environment can easily cause functional lesions in the tissues and organs in the human body, which can be life-threatening in severe cases. Especially in hospitals, all kinds of electromagnetic radiation often interfere with the normal work of various electronic diagnosis and treatment instruments, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L41/00C08L79/02C08K9/06C08K3/38
Inventor 陈培培朱小娟苏靓靓
Owner 潍坊护理职业学院
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