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X/gamma ray shielding composite material based on polyvinyl alcohol through-hole foam and preparation method of X/gamma ray shielding composite material

A polyvinyl alcohol and composite material technology, applied in shielding, reactor, nuclear engineering and other directions, can solve the problems of low shielding efficiency, suffocation, limited addition of shielding materials, etc., to improve compatibility and reinforcement, and improve flexibility. , the effect of good air permeability

Pending Publication Date: 2020-12-11
SWOTO PROTECTION & TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Most of the X-ray shielding materials are coated with rubber or PVC, which are bulky, stuffy and airtight. Although the fabrics or protective clothing made of X-ray shielding fibers have certain air permeability, due to the influence of the spinning process, the addition of shielding materials The amount is limited, so that the overall shielding effectiveness is very low, and it can only have a protective effect on low-energy X / γ rays
Lack of non-lead gas permeable shielding materials for medium to high energy X / γ-ray protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 30 parts by weight of polyvinyl alcohol 1788 (Anhui Wanwei High-tech Materials Co., Ltd.) into 250 parts by weight of water, stir and dissolve at 90-95°C, add 100 parts by weight of bismuth powder, stir evenly, and slowly cool down to 72°C. Then add 15 parts by weight of potato starch (99%, Guyuan Xueguan Starch Co., Ltd.), stir evenly; cool down to 52-54 ° C, add 8 parts by weight of formaldehyde solution for acetalization; add 5 parts by weight of hydrochloric acid, mix and stir Evenly; then pour into the mold and dry at 65°C for 7-8 hours; after demoulding, wash with water to remove residual potato starch, hydrochloric acid, and formaldehyde in the matrix until the water is neutral, and dry to obtain a breathable radiation shielding composite material .

[0031]Thus obtain a polyvinyl alcohol-based breathable foam material with a thickness of 1mm and a square meter weight of 1.8kg / m 2 . For X-rays with a tube voltage of 120KV (average energy 100KeV), it can shi...

Embodiment 2

[0033] 1) Put 100 parts by weight of bismuth trioxide / tantalum powder (mass ratio 1:2) into a high-speed mixer, stir and dry, the temperature of the material reaches 100-110°C, and the drying time is 10-15min, so that the bismuth trioxide / The moisture content of tantalum powder is lower than 0.3%, slowly add 10 parts by weight of isopropanol solution of titanate coupling agent (isopropanol / titanate coupling agent=1:10), stir and control the temperature at 105 ℃, modification time 3-5min;

[0034] 2) Dissolve 15 parts by weight of sodium hydroxymethylcellulose (99%, Shanghai Changguang Enterprise Development Co., Ltd.) in 50 parts by weight of water, stir evenly, form a paste, and set aside;

[0035] 3) Add 40 parts by weight of polyvinyl alcohol 1788 (Anhui Wanwei High-tech Materials Co., Ltd.) / glycerin (mass ratio 1:1) to 200 parts by weight of water, stir and dissolve at 95°C, add 100 parts by weight of modified Bismuth trioxide / tantalum powder, stir evenly, slowly cool do...

Embodiment 3

[0038] 1) Put 100 parts by weight of tungsten carbide / tungsten powder (mass ratio 2:1) into a high-speed mixer, stir and dry, the temperature of the material reaches 100-110°C, and the drying time is 10-15min, so that the moisture content of tungsten carbide is lower than 0.3%, slowly add 10 parts by weight of silane coupling agent (KH-550) in isopropanol solution (isopropanol / silane coupling agent = 1:10), stir, control temperature 105°C, modification time 3 -5min;

[0039] 2) Dissolve 12 parts by weight of hydroxypropyl methylcellulose (CA-F01, 98%, Guangzhou Duomeiduo New Material Co., Ltd.) in 50 parts by weight of water, stir evenly, form a paste, and set aside;

[0040] 3) Add 50 parts by weight of polyvinyl alcohol 1799 (Anhui Wanwei High-tech Materials Co., Ltd.) / xylitol (mass ratio 3:2) to 200 parts by weight of water, stir and dissolve at 95°C, add 100 parts by weight of modified Stir the final tungsten carbide / tungsten powder evenly, slowly cool down to 72°C, then ...

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Abstract

The invention relates to an X / gamma ray shielding composite material based on polyvinyl alcohol through-hole foam and a preparation method of the X / gamma ray shielding composite material. The X / gammaray shielding composite material based on the polyvinyl alcohol through-hole foam is formed by combining a lead-free X / gamma ray shielding material and polyvinyl alcohol through physical or chemical bonds, and comprises the following components in parts by weight: 40-90 parts of the lead-free X / gamma ray shielding material, 10-40 parts of a polyvinyl alcohol mixture, and 0-20 parts of a pore-forming agent, wherein the weight percentage of polyvinyl alcohol in the polyvinyl alcohol mixture is 20-100%. According to the X / gamma ray shielding composite material, the defect that a traditional ray shielding material is stuffy and airtight is overcome, the X / gamma ray shielding material has comfortable and breathable performance on the basis of meeting X / gamma ray shielding so as to protect a human body from ray irradiation, and the ray shielding material and a polyvinyl alcohol matrix are combined in a chemical bond form and are not prone to being separated out or disengaged.

Description

technical field [0001] The invention relates to the field of X / γ-ray shielding materials, in particular to an X / γ-ray shielding composite material based on polyvinyl alcohol through-hole foam and a preparation method thereof. Background technique [0002] Radiation in real life is very common. For example, various electronic products such as mobile phones, computers, wireless transmitters, and microwave ovens will produce a certain amount of radiation, but the amount of radiation irradiated to the human body is relatively small, and the impact on the human body is negligible. Domestic tertiary hospitals basically have X-ray examinations, interventional radiology departments, CT, etc., and a large number of staff are easily exposed to X-rays or γ-rays during work. Although one exposure to X-rays is only equivalent to the amount of radiation that the human body receives from the air for 3 days to 7 months depending on the location of the shooting, there is a cumulative effect ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F1/10
CPCG21F1/106
Inventor 代国亮徐超王炳来蒋春燕陆锋文美莲施楣梧
Owner SWOTO PROTECTION & TECH CO LTD
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