CN113674889A - X-ray radiation protection module and manufacturing method thereof - Google Patents
X-ray radiation protection module and manufacturing method thereof Download PDFInfo
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- CN113674889A CN113674889A CN202110876056.3A CN202110876056A CN113674889A CN 113674889 A CN113674889 A CN 113674889A CN 202110876056 A CN202110876056 A CN 202110876056A CN 113674889 A CN113674889 A CN 113674889A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
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- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims abstract description 53
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 47
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 47
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 47
- 229910052601 baryte Inorganic materials 0.000 claims abstract description 26
- 239000010428 baryte Substances 0.000 claims abstract description 26
- 229910000416 bismuth oxide Inorganic materials 0.000 claims abstract description 25
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 claims abstract description 25
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910001938 gadolinium oxide Inorganic materials 0.000 claims abstract description 24
- 229940075613 gadolinium oxide Drugs 0.000 claims abstract description 24
- CMIHHWBVHJVIGI-UHFFFAOYSA-N gadolinium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[Gd+3].[Gd+3] CMIHHWBVHJVIGI-UHFFFAOYSA-N 0.000 claims abstract description 24
- XWROSHJVVFETLV-UHFFFAOYSA-N [B+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O Chemical compound [B+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O XWROSHJVVFETLV-UHFFFAOYSA-N 0.000 claims abstract description 22
- WRIKHQLVHPKCJU-UHFFFAOYSA-N sodium bis(trimethylsilyl)amide Chemical compound C[Si](C)(C)N([Na])[Si](C)(C)C WRIKHQLVHPKCJU-UHFFFAOYSA-N 0.000 claims abstract description 22
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 84
- 239000002002 slurry Substances 0.000 claims description 70
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 66
- 239000000843 powder Substances 0.000 claims description 46
- 238000002156 mixing Methods 0.000 claims description 43
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 42
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 42
- 229910001868 water Inorganic materials 0.000 claims description 42
- 239000002994 raw material Substances 0.000 claims description 32
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- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 22
- 235000019353 potassium silicate Nutrition 0.000 claims description 22
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 22
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 22
- XYRAEZLPSATLHH-UHFFFAOYSA-N trisodium methoxy(trioxido)silane Chemical compound [Na+].[Na+].[Na+].CO[Si]([O-])([O-])[O-] XYRAEZLPSATLHH-UHFFFAOYSA-N 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 21
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims description 20
- 229910001388 sodium aluminate Inorganic materials 0.000 claims description 20
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Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F1/00—Shielding characterised by the composition of the materials
- G21F1/12—Laminated shielding materials
- G21F1/125—Laminated shielding materials comprising metals
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F1/00—Shielding characterised by the composition of the materials
- G21F1/02—Selection of uniform shielding materials
- G21F1/08—Metals; Alloys; Cermets, i.e. sintered mixtures of ceramics and metals
Abstract
The invention provides an X-ray radiation protection module and a manufacturing method thereof, wherein the X-ray radiation protection module is prepared by adopting multi-component composition, an A layer containing lead powder, bismuth oxide and gadolinium oxide plays roles in shielding, absorbing and reflecting X-rays, and then modifier, sodium bis (trimethylsilyl) amide and boron nitrate are adopted to reduce the hygroscopicity of magnesium oxide and increase the heat conductivity coefficient of the material; the layer B containing barite and barium sulfate powder plays a role in multi-stage refraction and shielding absorption of X rays, and can consume the X rays to the maximum extent; the protective module adopts a multilayer structure design that the layer A is used as an outer layer and the layer B or a mixed layer of the layer A and the layer B is used as an inner layer, can play the roles of multi-stage refraction, shielding absorption and reflection on X rays, can consume the X rays to the maximum extent, reduces the transmissivity and realizes the high protective effect of the X rays with different energy levels.
Description
Technical Field
The invention relates to the technical field of radiation protection, in particular to an X-ray radiation protection module and a manufacturing method thereof.
Background
Ct (computed tomography), an X-ray computed tomography apparatus, belongs to the application of ionizing radiation in the medical field. With the application of X-rays, radiation diagnosis and treatment work such as radiotherapy, interventional radiology, nuclear medicine, radiodiagnosis and the like has rapidly become an essential important element, supporting the development of modern medicine. Their emergence provides a good means and method for diagnosing and treating diseases for a wider range of patients and healthy people. Although the rapid development of CT technology has improved the diagnosis of disease, the International Commission on Radiological Protection (ICRP) states that "X-CT examination may subject a subject to a relatively high exposure dose". The United Nations Atomic Radiation Effects Scientific Committee (United Nations Scientific Committee on the Effects of Atomic Radiation unscape) 2000 statistics showed that the worldwide CT examination accounted for only 5% of all X-ray diagnostic examinations, whereas its resulting public collective dose accounted for 34% of the national collective dose.
Because the CT/DR examination can cause the examinee to be exposed to higher radiation dose, people pay more and more attention to the radiation safety hazard of the examinee caused by the radiation dose caused by the CT/DR examination, and researches show that X-ray radiation is a serious injury to the human body and can increase the incidence rate of various cancers and nervous system diseases. This has become an important public health problem involving members of the public worldwide and their progeny. The research on how to fully utilize CT/DR medical radiation to benefit human beings, and the adoption of novel protective materials and means to control the radiation hazard possibly generated by the CT/DR medical radiation to the greatest extent, achieves the reasonable application of CT/DR examination, reduces the injury and pain of patients and has important social significance.
At present, except for shielding ray radiation in special construction of room medical radiation rooms for rooms such as CT rooms and X-ray rooms, a common protective measure is to wear personal protective articles during common CT or X-ray radiographic examination. The protective areas of these protective measures are not comprehensive enough, time-consuming to wear, bulky, and bacterial infection, and especially the radiation problem cannot be fundamentally solved. Secondly, the problem of electromagnetic radiation reflection caused by the adoption of a heavy lead plate is also considered, an absorption mechanism is adopted as far as possible, electromagnetic radiation pollution is eliminated as an important solution, lead has biotoxicity and environmental hazard, and lead-containing products are very heavy due to the fact that the lead-containing products contain high-density lead. Therefore, innovative approaches must be taken for radiation protection, and new radiation protection materials are actively developed.
In the previous research work, an X-ray radiation protection plate and a manufacturing method thereof are researched (patent number: CN110473641A), wherein the protection plate consists of a lead layer, a steel plate protection layer and a composite absorption layer, can absorb X-ray radiation to the maximum extent, has large X-ray radiation loss and good protection effect, and also has the characteristics of antibiosis and stain resistance, firm material, long durability and convenient production and application, but the protection plate has higher lead content, heavy mass and poor mobility, and has larger construction difficulty in a machine room reconstructed at the later stage. Therefore, based on previous research, the protective plate is further improved, and the X-ray radiation protective material with low lead content and convenient construction is developed.
Disclosure of Invention
In view of the above problems, the present invention provides an X-ray radiation protection module and a method for manufacturing the same.
The invention provides an X-ray radiation protection module, comprising: a layer A and a layer B; the layer A comprises the following raw materials in parts by weight: 40-60 parts of magnesium sulfate, 30-70 parts of water, 1 part of modifier, 10-20 parts of sodium bis (trimethylsilyl) amide, 20-30 parts of boron nitrate, 80-140 parts of magnesium oxide powder, 100-150 parts of lead powder, 20-50 parts of bismuth oxide and 40-70 parts of gadolinium oxide; the layer B comprises the following raw materials in parts by weight: 40-60 parts of magnesium sulfate, 30-70 parts of water, 1 part of modifier, 80-140 parts of magnesium oxide powder, 10-50 parts of barite and 30-50 parts of barium sulfate powder; the modifier comprises the following raw materials in parts by weight: 0.05-0.3 part of sodium polyacrylate, 0.05-0.3 part of sodium methyl silicate, 0.2-0.6 part of citric acid, 0.05-0.3 part of water glass and 0.05-0.2 part of sodium aluminate.
Further, the protection module includes, in a thickness direction: an inner layer and an outer layer on both sides of the inner layer; the outer layer comprises one or more layers A, and the layer structure type of the inner layer comprises one or more of a layer B, a layer A-B and a layer A-B-A.
Further, the thickness of the A layer is 1.0-1.5 mm.
Further, the thickness of the B layer is 10-12 mm.
Further, the activity of the magnesium oxide powder is 80 or more.
Furthermore, the particle sizes of the barite and the barium sulfate powder are both more than 100 meshes.
In another aspect, the present invention further provides a method for manufacturing the X-ray radiation protection module, including the following steps:
s1, preparing a modifier: mixing sodium methyl silicate, water glass and sodium aluminate, ball milling for 3-5min at the speed of 80-90r/min, and adding citric acid and sodium polyacrylate;
s2. preparation of the A layer: uniformly mixing magnesium sulfate, water, sodium bis (trimethylsilyl) amide and boron nitrate, adding a modifier and magnesium oxide powder, performing ball milling for 10-16min, finally adding lead powder, bismuth oxide and gadolinium oxide, and stirring at the speed of 600r/min for 3-10min to obtain layer A slurry;
s3, preparing a B layer: uniformly mixing magnesium sulfate and water, adding a modifier, fully mixing, adding magnesium oxide powder, barite and barium sulfate powder, and stirring at the speed of 500-800r/min for 3-10min to obtain B-layer slurry;
s4, preparing an X-ray radiation protection module: and sequentially pouring the slurry of the layer A or the slurry of the layer B, condensing, forming and maintaining to obtain the X-ray radiation protection module.
Further, the step of pouring the slurry of the layer A or the layer B in sequence is to pour the slurry of the layer A or the layer B, condense and form the slurry, and pour the slurry of the next layer in sequence.
Further, in step S2, the rotation speed of the ball mill is 200-300 r/min.
Furthermore, the mould is a plastic suction mould consisting of a plurality of small modules; the small modules are mutually independent, and two adjacent small modules are connected through a plastic sheet.
Furthermore, the specification of the plastic sheet is that the width is 0.05-0.1mm, the thickness is less than 0.1mm, and the length is equal to the length of the small module.
Further, the size of the small module is 1cm by 1.5 cm.
On the other hand, the invention also provides application of the X-ray radiation protection module in building an X-ray machine room or preparing an X-ray protection tool.
Compared with the prior art, the invention has the beneficial effects that:
the X-ray radiation protection module is prepared by adopting multi-component composition, the layer A containing lead powder, bismuth oxide and gadolinium oxide plays roles in shielding, absorbing and reflecting X-rays, and the modifier, sodium bis (trimethylsilyl) amide and boron nitrate are adopted to reduce the hygroscopicity of magnesium oxide and increase the heat conductivity coefficient of the material; the B layer containing barite and barium sulfate powder has multi-stage refraction, shielding and absorption effects on X-rays, and can consume the X-rays to the maximum extent.
The protective module adopts a multilayer structure design that the layer A is used as an outer layer and the layer B or a mixed layer of the layer A and the layer B is used as an inner layer, can play a role in multi-stage refraction, shielding absorption and reflection of X rays, firstly shields and absorbs and reflects electromagnetic radiation by the layer A, then shields and absorbs the electromagnetic radiation by the layer B in the inner layer and shields and absorbs the layer A, and finally shields and absorbs the electromagnetic radiation again by the layer A, reflects shielding and absorbing redundant radiation back to the inner layer for continuous consumption, reduces the transmissivity, and can realize high protective effect of the X rays with different energy levels.
According to the invention, by adding bismuth oxide and gadolinium oxide, the X-ray shielding and absorbing effect of the material is improved, the using amount of lead powder is reduced, the effect of a modifier and other components is utilized, the reflection degree of the layer A is reduced, the weight of the protective material and secondary radiation caused by reflection energy are reduced, and the protective module also has the characteristics of high protection efficiency, antibiosis and stain resistance, long durability, convenience in application and the like.
The plastic suction mold of the invention prepares the protection module into mutually independent small modules which are connected by the plastic sheets, so that the whole material has the bending characteristic, can be formed into any size, is convenient to use, and can be used for X-ray machine room construction and preparation of protection tools.
Drawings
FIG. 1 is a schematic structural view of an X-ray radiation protection module according to embodiment 1 of the present invention;
fig. 2 is a schematic diagram of a multi-stage transmission absorption reflection shielding protection mechanism of an X-ray radiation protection module manufactured in embodiment 1 of the present invention;
FIG. 3 is a schematic cross-sectional view of the plastic suction mold of the present invention;
FIG. 4 is a top schematic view of the plastic suction mold of the present invention;
FIG. 5 is a schematic structural view of an X-ray radiation protection module according to embodiment 2 of the present invention;
FIG. 6 is a schematic structural view of an X-ray radiation protection module manufactured in example 3 of the present invention;
in the figure, layer 1-a, layer 2-B, 3-small module, 4-mold opening, 5-plastic sheet, 6-mold bottom;
Detailed Description
In order to better understand the technical content of the invention, specific examples are provided below to further illustrate the invention.
The activity of the magnesium oxide powder used in the following of the present invention was more than 80.
The barite and barium sulfate powders used in the following of the present invention are all of particle size greater than 100 mesh.
The following weight portions of the invention are g or kg.
The plastic suction mould of the invention is a plastic suction mould consisting of a plurality of small modules 3; the small modules are mutually independent, and two adjacent small modules 3 are connected through a plastic sheet 4; the specification of the plastic sheet 4 is that the width is 0.05-0.1mm, the thickness is less than 0.1mm, and the length is equal to the length of the small module;
example 1
An X-ray radiation protection module comprising in thickness direction: an inner layer and an outer layer on both sides of the inner layer; the outer layer consists of 1 layer A, and the layer structure type of the inner layer is a layer B;
the layer A comprises the following raw materials in parts by weight: 40 parts of magnesium sulfate, 30 parts of water, 1 part of modifier, 10 parts of sodium bis (trimethylsilyl) amide, 20 parts of boron nitrate, 80 parts of magnesium oxide powder, 100 parts of lead powder, 20 parts of bismuth oxide and 40 parts of gadolinium oxide;
the layer B comprises the following raw materials in parts by weight: 40 parts of magnesium sulfate, 30 parts of water, 1 part of modifier, 80 parts of magnesium oxide powder, 10 parts of barite and 30 parts of barium sulfate powder;
the modifier comprises the following raw materials in parts by weight: 0.1 part of sodium polyacrylate, 0.3 part of sodium methyl silicate, 0.2 part of citric acid, 0.05 part of water glass and 0.05 part of sodium aluminate.
The manufacturing method of the X-ray radiation protection module comprises the following steps:
s1, preparing a modifier: mixing sodium methyl silicate, water glass and sodium aluminate, ball-milling for 5min at the speed of 80r/min, and then adding citric acid and sodium polyacrylate;
s2. preparation of the A layer: uniformly mixing magnesium sulfate, water, sodium bis (trimethylsilyl) amide and boron nitrate, adding a modifier and magnesium oxide powder, performing ball milling at the rotating speed of 200r/min for 10min, finally adding lead powder, bismuth oxide and gadolinium oxide, and stirring at the speed of 500r/min for 5min to obtain layer A slurry;
s3, preparing a B layer: uniformly mixing magnesium sulfate and water, adding a modifier, fully mixing, adding magnesium oxide powder, barite and barium sulfate powder, and stirring at the speed of 500r/min for 5min to obtain layer B slurry;
s4, preparing an X-ray radiation protection module: and sequentially pouring the slurry of the layer A into the mould, after the slurry of the layer A is coagulated and formed, pouring the slurry of the layer B into the mould, after the slurry of the layer A is coagulated and formed, pouring the slurry of the layer A into the mould again, coagulating and forming the mould, and maintaining the mould to obtain the X-ray radiation protection module.
Example 2
An X-ray radiation protection module comprising in thickness direction: an inner layer and an outer layer on both sides of the inner layer; the outer layer consists of 2 layers of A layers, and the layer structure type of the inner layer is a B layer;
the layer A comprises the following raw materials in parts by weight: 50 parts of magnesium sulfate, 60 parts of water, 1 part of modifier, 15 parts of sodium bis (trimethylsilyl) amide, 24 parts of boron nitrate, 100 parts of magnesium oxide powder, 120 parts of lead powder, 30 parts of bismuth oxide and 50 parts of gadolinium oxide;
the layer B comprises the following raw materials in parts by weight: 50 parts of magnesium sulfate, 60 parts of water, 1 part of modifier, 100 parts of magnesium oxide powder, 20 parts of barite and 40 parts of barium sulfate powder;
the modifier comprises the following raw materials in parts by weight: 0.1 part of sodium polyacrylate, 0.2 part of sodium methyl silicate, 0.4 part of citric acid, 0.2 part of water glass and 0.2 part of sodium aluminate.
The manufacturing method of the X-ray radiation protection module comprises the following steps:
s1, preparing a modifier: mixing sodium methyl silicate, water glass and sodium aluminate, ball-milling for 3min at the speed of 90r/min, and then adding citric acid and sodium polyacrylate;
s2. preparation of the A layer: uniformly mixing magnesium sulfate, water, sodium bis (trimethylsilyl) amide and boron nitrate, adding a modifier and magnesium oxide powder, performing ball milling at the rotating speed of 300r/min for 10min, finally adding lead powder, bismuth oxide and gadolinium oxide, and stirring at the speed of 300r/min for 10min to obtain layer A slurry;
s3, preparing a B layer: uniformly mixing magnesium sulfate and water, adding a modifier, fully mixing, adding magnesium oxide powder, barite and barium sulfate powder, and stirring at the speed of 600r/min for 5min to obtain layer B slurry;
s4, preparing an X-ray radiation protection module: and sequentially pouring the slurry of the layer A into the mould, after condensation forming, pouring the slurry of the layer A again, after condensation forming, pouring the slurry of the layer B again, after condensation forming, pouring the slurry of the layer A again, condensation forming and curing to obtain the X-ray radiation protection module.
Example 3
An X-ray radiation protection module comprising in thickness direction: an inner layer and an outer layer on both sides of the inner layer; the outer layer consists of 1 layer A, and the layer structure type of the inner layer comprises a layer B, a layer A and a layer B;
the layer A comprises the following raw materials in parts by weight: 60 parts of magnesium sulfate, 70 parts of water, 1 part of modifier, 20 parts of sodium bis (trimethylsilyl) amide, 30 parts of boron nitrate, 130 parts of magnesium oxide powder, 150 parts of lead powder, 50 parts of bismuth oxide and 70 parts of gadolinium oxide;
the layer B comprises the following raw materials in parts by weight: 60 parts of magnesium sulfate, 70 parts of water, 1 part of modifier, 130 parts of magnesium oxide powder, 10 parts of barite and 50 parts of barium sulfate powder;
the modifier comprises the following raw materials in parts by weight: 0.3 part of sodium polyacrylate, 0.3 part of sodium methyl silicate, 0.6 part of citric acid, 0.3 part of water glass and 0.1 part of sodium aluminate.
The manufacturing method of the X-ray radiation protection module comprises the following steps:
s1, preparing a modifier: mixing sodium methyl silicate, water glass and sodium aluminate, ball-milling for 3min at the speed of 90r/min, and then adding citric acid and sodium polyacrylate;
s2. preparation of the A layer: uniformly mixing magnesium sulfate, water, sodium bis (trimethylsilyl) amide and boron nitrate, adding a modifier and magnesium oxide powder, performing ball milling at the rotating speed of 300r/min for 15min, finally adding lead powder, bismuth oxide and gadolinium oxide, and stirring at the speed of 600r/min for 5min to obtain layer A slurry;
s3, preparing a B layer: uniformly mixing magnesium sulfate and water, adding a modifier, fully mixing, adding magnesium oxide powder, barite and barium sulfate powder, and stirring at the speed of 800r/min for 3min to obtain layer B slurry;
s4, preparing an X-ray radiation protection module: and sequentially pouring the slurry of the layer A into the mould, after the slurry of the layer B is condensed and formed, pouring the slurry of the layer A again after the slurry of the layer B is condensed and formed, condensing and forming, and curing to obtain the X-ray radiation protection module.
Example 4
An X-ray radiation protection module comprising in thickness direction: an inner layer and an outer layer on both sides of the inner layer; the outer layer consists of 1 layer A, and the layer structure type of the inner layer is a layer B;
the layer A comprises the following raw materials in parts by weight: 40 parts of magnesium sulfate, 30 parts of water, 1 part of modifier, 10 parts of sodium bis (trimethylsilyl) amide, 20 parts of boron nitrate, 80 parts of magnesium oxide powder, 100 parts of lead powder, 20 parts of bismuth oxide and 40 parts of gadolinium oxide;
the layer B comprises the following raw materials in parts by weight: 40 parts of magnesium sulfate, 30 parts of water, 1 part of modifier, 80 parts of magnesium oxide powder, 10 parts of barite and 30 parts of barium sulfate powder;
the modifier comprises the following raw materials in parts by weight: 0.1 part of sodium polyacrylate, 0.3 part of sodium methyl silicate, 0.2 part of citric acid, 0.05 part of water glass and 0.05 part of sodium aluminate.
The manufacturing method of the X-ray radiation protection module comprises the following steps:
s1, preparing a modifier: mixing sodium methyl silicate, water glass and sodium aluminate, ball-milling for 5min at the speed of 80r/min, and then adding citric acid and sodium polyacrylate;
s2. preparation of the A layer: uniformly mixing magnesium sulfate, water, sodium bis (trimethylsilyl) amide and boron nitrate, adding a modifier, performing ball milling for 10min at the rotating speed of 300r/min, finally adding magnesium oxide powder, lead powder, bismuth oxide and gadolinium oxide, and stirring for 5min at the speed of 500r/min to obtain layer A slurry;
s3, preparing a B layer: uniformly mixing magnesium sulfate and water, adding a modifier, fully mixing, adding magnesium oxide powder, barite and barium sulfate powder, and stirring at the speed of 500r/min for 5min to obtain layer B slurry;
s4, preparing an X-ray radiation protection module: and sequentially pouring the slurry of the layer A into the mould, after the slurry of the layer A is coagulated and formed, pouring the slurry of the layer B into the mould, after the slurry of the layer A is coagulated and formed, pouring the slurry of the layer A into the mould again, coagulating and forming the mould, and maintaining the mould to obtain the X-ray radiation protection module.
Example 5
An X-ray radiation protection module comprising in thickness direction: an inner layer and an outer layer on both sides of the inner layer; the outer layer consists of 1 layer A, and the layer structure type of the inner layer is a layer B;
the layer A comprises the following raw materials in parts by weight: 40 parts of magnesium sulfate, 30 parts of water, 1 part of modifier, 10 parts of sodium bis (trimethylsilyl) amide, 20 parts of boron nitrate, 80 parts of magnesium oxide powder, 100 parts of lead powder, 20 parts of bismuth oxide and 40 parts of gadolinium oxide;
the layer B comprises the following raw materials in parts by weight: 40 parts of magnesium sulfate, 30 parts of water, 1 part of modifier, 80 parts of magnesium oxide powder, 10 parts of barite and 30 parts of barium sulfate powder;
the modifier comprises the following raw materials in parts by weight: 0.1 part of sodium polyacrylate, 0.3 part of sodium methyl silicate, 0.2 part of citric acid, 0.05 part of water glass and 0.05 part of sodium aluminate.
The manufacturing method of the X-ray radiation protection module comprises the following steps:
s1, preparing a modifier: mixing sodium methyl silicate, water glass and sodium aluminate, ball-milling for 3min at the speed of 90r/min, and then adding citric acid and sodium polyacrylate;
s2. preparation of the A layer: uniformly mixing magnesium sulfate and water, adding sodium bis (trimethylsilyl) amide, boron nitrate and a modifier, performing ball milling at the rotating speed of 200r/min for 10min, finally adding magnesium oxide powder, lead powder, bismuth oxide and gadolinium oxide, and stirring at the speed of 500r/min for 5min to obtain layer A slurry;
s3, preparing a B layer: uniformly mixing magnesium sulfate and water, adding a modifier, fully mixing, adding magnesium oxide powder, barite and barium sulfate powder, and stirring at the speed of 600r/min for 5min to obtain layer B slurry;
s4, preparing an X-ray radiation protection module: and sequentially pouring the slurry of the layer A into the mould, after the slurry of the layer A is coagulated and formed, pouring the slurry of the layer B into the mould, after the slurry of the layer A is coagulated and formed, pouring the slurry of the layer A into the mould again, coagulating and forming the mould, and maintaining the mould to obtain the X-ray radiation protection module.
Example 6
An X-ray radiation protection module comprising in thickness direction: an inner layer and an outer layer on both sides of the inner layer; the outer layer consists of 1 layer B, and the layer structure of the inner layer is 1 layer A;
the layer A comprises the following raw materials in parts by weight: 40 parts of magnesium sulfate, 30 parts of water, 1 part of modifier, 10 parts of sodium bis (trimethylsilyl) amide, 20 parts of boron nitrate, 80 parts of magnesium oxide powder, 100 parts of lead powder, 20 parts of bismuth oxide and 40 parts of gadolinium oxide;
the layer B comprises the following raw materials in parts by weight: 40 parts of magnesium sulfate, 30 parts of water, 1 part of modifier, 80 parts of magnesium oxide powder, 10 parts of barite and 30 parts of barium sulfate powder;
the modifier comprises the following raw materials in parts by weight: 0.1 part of sodium polyacrylate, 0.3 part of sodium methyl silicate, 0.2 part of citric acid, 0.05 part of water glass and 0.05 part of sodium aluminate.
The manufacturing method of the X-ray radiation protection module comprises the following steps:
s1, preparing a modifier: mixing sodium methyl silicate, water glass and sodium aluminate, ball-milling for 5min at the speed of 80r/min, and then adding citric acid and sodium polyacrylate;
s2. preparation of the A layer: uniformly mixing magnesium sulfate, water, sodium bis (trimethylsilyl) amide and boron nitrate, adding a modifier and magnesium oxide powder, performing ball milling at the rotating speed of 200r/min for 10min, finally adding lead powder, bismuth oxide and gadolinium oxide, and stirring at the speed of 500r/min for 5min to obtain layer A slurry;
s3, preparing a B layer: uniformly mixing magnesium sulfate and water, adding a modifier, fully mixing, adding magnesium oxide powder, barite and barium sulfate powder, and stirring at the speed of 500r/min for 5min to obtain layer B slurry;
s4, preparing an X-ray radiation protection module: and sequentially pouring the slurry of the layer B into the mould, after the slurry of the layer A is condensed and formed, pouring the slurry of the layer B again after the slurry of the layer A is condensed and formed, condensing and forming, and maintaining to obtain the X-ray radiation protection module.
Comparative example 1
An X-ray radiation protection module comprises the following raw materials in parts by weight: 80 parts of magnesium sulfate, 70 parts of water, 2 parts of modifier, 10 parts of sodium bis (trimethylsilyl) amide, 20 parts of boron nitrate, 160 parts of magnesium oxide powder, 200 parts of lead powder, 40 parts of bismuth oxide, 80 parts of gadolinium oxide, 10 parts of barite and 30 parts of barium sulfate powder.
The modifier comprises the following raw materials in parts by weight: 0.1 part of sodium polyacrylate, 0.3 part of sodium methyl silicate, 0.2 part of citric acid, 0.05 part of water glass and 0.05 part of sodium aluminate.
The manufacturing method of the X-ray radiation protection module comprises the following steps:
s1, preparing a modifier: mixing sodium methyl silicate, water glass and sodium aluminate, ball-milling for 5min at the speed of 80r/min, and then adding citric acid and sodium polyacrylate;
s2, preparing an X-ray radiation protection module: uniformly mixing magnesium sulfate, water, sodium bis (trimethylsilyl) amide and boron nitrate, adding a modifier and magnesium oxide powder, ball-milling at the rotating speed of 200r/min for 10min, finally adding lead powder, bismuth oxide, gadolinium oxide, barite and barium sulfate powder, and stirring at the speed of 500r/min for 5min to obtain slurry;
s4 forming: and pouring the slurry into a mold, condensing, forming and maintaining to obtain the X-ray radiation protection module.
Comparative example 2
An X-ray radiation protection module comprising in thickness direction: an inner layer and an outer layer on both sides of the inner layer; the outer layer consists of 1 layer A, and the layer structure type of the inner layer is a layer B;
the layer A comprises the following raw materials in parts by weight: 40 parts of magnesium sulfate, 30 parts of water, 1 part of modifier, 80 parts of magnesium oxide powder, 100 parts of lead powder and 20 parts of bismuth oxide;
the layer B comprises the following raw materials in parts by weight: 40 parts of magnesium sulfate, 30 parts of water, 1 part of modifier, 80 parts of magnesium oxide powder, 10 parts of barite and 30 parts of barium sulfate powder;
the modifier comprises the following raw materials in parts by weight: 0.1 part of sodium polyacrylate, 0.3 part of sodium methyl silicate, 0.2 part of citric acid, 0.05 part of water glass and 0.05 part of sodium aluminate.
The manufacturing method of the X-ray radiation protection module comprises the following steps:
s1, preparing a modifier: mixing sodium methyl silicate, water glass and sodium aluminate, ball-milling for 5min at the speed of 80r/min, and then adding citric acid and sodium polyacrylate;
s2. preparation of the A layer: uniformly mixing magnesium sulfate and water, adding a modifier and magnesium oxide powder, performing ball milling for 10min at the rotating speed of 200r/min, finally adding lead powder, bismuth oxide and gadolinium oxide, and stirring for 5min at the speed of 500r/min to obtain layer A slurry;
s3, preparing a B layer: uniformly mixing magnesium sulfate and water, adding a modifier, fully mixing, adding magnesium oxide powder, barite and barium sulfate powder, and stirring at the speed of 500r/min for 5min to obtain layer B slurry;
s4, preparing an X-ray radiation protection module: and sequentially pouring the slurry of the layer A into the mould, after the slurry of the layer A is coagulated and formed, pouring the slurry of the layer B into the mould, after the slurry of the layer A is coagulated and formed, pouring the slurry of the layer A into the mould again, coagulating and forming the mould, and maintaining the mould to obtain the X-ray radiation protection module.
Comparative example 3
An X-ray radiation protection module comprising in thickness direction: an inner layer and an outer layer on both sides of the inner layer; the outer layer consists of 1 layer A, and the layer structure type of the inner layer is a layer B;
the layer A comprises the following raw materials in parts by weight: 40 parts of magnesium sulfate, 30 parts of water, 1 part of modifier, 20 parts of sodium bis (trimethylsilyl) amide, 20 parts of boron nitrate, 80 parts of magnesium oxide powder, 100 parts of lead powder, 30 parts of bismuth oxide and 40 parts of gadolinium oxide;
the layer B comprises the following raw materials in parts by weight: 40 parts of magnesium sulfate, 30 parts of water, 1 part of modifier, 80 parts of magnesium oxide powder, 10 parts of barite and 30 parts of barium sulfate powder;
the modifier comprises the following raw materials in parts by weight: 0.1 part of sodium polyacrylate, 0.3 part of sodium methyl silicate, 0.2 part of citric acid and 0.5 part of water glass.
The manufacturing method of the X-ray radiation protection module comprises the following steps:
s1, preparing a modifier: mixing sodium methyl silicate and water glass, ball-milling for 5min at the speed of 80r/min, and then adding citric acid and sodium polyacrylate;
s2. preparation of the A layer: uniformly mixing magnesium sulfate, water, sodium bis (trimethylsilyl) amide and boron nitrate, adding a modifier and magnesium oxide powder, performing ball milling at the rotating speed of 200r/min for 10min, finally adding lead powder, bismuth oxide and gadolinium oxide, and stirring at the speed of 500r/min for 5min to obtain layer A slurry;
s3, preparing a B layer: uniformly mixing magnesium sulfate and water, adding a modifier, fully mixing, adding magnesium oxide powder, barite and barium sulfate powder, and stirring at the speed of 500r/min for 5min to obtain layer B slurry;
s4, preparing an X-ray radiation protection module: and sequentially pouring the slurry of the layer A into the mould, after the slurry of the layer A is coagulated and formed, pouring the slurry of the layer B into the mould, after the slurry of the layer A is coagulated and formed, pouring the slurry of the layer A into the mould again, coagulating and forming the mould, and maintaining the mould to obtain the X-ray radiation protection module.
The X-ray radiation protection modules prepared in the embodiment and the comparative example are assembled into a protection plate with the thickness of 500mm multiplied by 500mm, and the radiation protection test and the heat conduction performance test are carried out, and the results are shown in the table 1;
the test method comprises the following steps: based on a Monte Carlo MCNP5 program, simulating the penetration conditions of incident X-rays when the energy of the X-rays is respectively 10keV, 40keV, 70keV and 100keV, respectively recording the X-ray flux passing through the protection module and the X-ray flux reflected by the protection module, and calculating the transmittance;
determining the specific lead equivalent of the X-ray radiation protection module according to GBZ/T147-2002 'determination of attenuation performance of X-ray protection material';
measuring the heat conductivity coefficient of the X-ray radiation protection module according to GB/T10294-;
TABLE 1
The results show that the X-ray radiation protection module prepared in embodiments 1 to 3 of the present invention has the best protection effect on X-rays of different energy levels, and the radiation transmittance is 1.2 to 4.6% and the reflectance is 46.8 to 69.6% at each energy level, which indicates that the protection module of the present invention can not only effectively protect X-rays of different energy levels, but also reduce secondary radiation generated by reflection, and has good thermal conductivity. Examples 4-5 had slightly less protective effect than example 1; in the embodiment 6, the B layer is used as the protective module of the outer layer, and the protective effect on the X-rays with different energy levels is poor.
Compared with the example 1, the X-ray radiation protection module prepared by using the composition components of the layer A and the layer B in the comparative example 1 in a mixing way has higher transmittance and reflectivity, and the component composition of the layer A of the invention is not used in the comparative example 2, so that the transmittance is high and the heat conductivity is poor; comparative example 3 has no composition using the modifier of the present invention, and has high reflectance and large secondary radiation.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. An X-ray radiation protection module, comprising: a layer A and a layer B; the layer A comprises the following raw materials in parts by weight: 40-60 parts of magnesium sulfate, 30-70 parts of water, 1 part of modifier, 10-20 parts of sodium bis (trimethylsilyl) amide, 20-30 parts of boron nitrate, 80-140 parts of magnesium oxide powder, 100-150 parts of lead powder, 20-50 parts of bismuth oxide and 40-70 parts of gadolinium oxide; the layer B comprises the following raw materials in parts by weight: 40-60 parts of magnesium sulfate, 30-70 parts of water, 1 part of modifier, 80-140 parts of magnesium oxide powder, 10-50 parts of barite and 30-50 parts of barium sulfate powder; the modifier comprises the following raw materials in parts by weight: 0.05-0.3 part of sodium polyacrylate, 0.05-0.3 part of sodium methyl silicate, 0.2-0.6 part of citric acid, 0.05-0.3 part of water glass and 0.05-0.2 part of sodium aluminate.
2. The X-ray radiation protection module of claim 1, wherein the protection module comprises: an inner layer and an outer layer on both sides of the inner layer; the outer layer comprises one or more layers A, and the layer structure type of the inner layer comprises one or more of a layer B, a layer A-B and a layer A-B-A.
3. The X-ray radiation protection module of claim 1, wherein the a layer has a thickness of 1.0-1.5 mm; the thickness of the B layer is 10-12 mm.
4. The X-ray radiation protection module of claim 1, wherein the magnesium oxide powder has an activity of 80 or more.
5. Method for manufacturing an X-ray radiation protection module according to any one of claims 1 to 4, comprising the following steps:
s1, preparing a modifier: mixing sodium methyl silicate, water glass and sodium aluminate, ball milling for 3-5min at the speed of 80-90r/min, and adding citric acid and sodium polyacrylate;
s2. preparation of the A layer: uniformly mixing magnesium sulfate, water, sodium bis (trimethylsilyl) amide and boron nitrate, adding a modifier and magnesium oxide powder, performing ball milling for 10-16min, finally adding lead powder, bismuth oxide and gadolinium oxide, and stirring at the speed of 600r/min for 3-10min to obtain layer A slurry;
s3, preparing a B layer: uniformly mixing magnesium sulfate and water, adding a modifier, fully mixing, adding magnesium oxide powder, barite and barium sulfate powder, and stirring at the speed of 500-800r/min for 3-10min to obtain B-layer slurry;
s4, preparing an X-ray radiation protection module: and sequentially pouring the slurry of the layer A or the slurry of the layer B, condensing, forming and maintaining to obtain the X-ray radiation protection module.
6. The method for manufacturing an X-ray radiation protection module according to claim 5, wherein the sequential pouring of the slurry for the A layer or the B layer is performed by sequentially pouring the slurry for the A layer or the B layer, coagulating and molding the slurry for the next layer.
7. The method of claim 5, wherein in step S2, the rotation speed of the ball mill is 200-300 r/min.
8. The method of claim 5, wherein the mold is a plastic blister mold comprising a plurality of small modules; the small modules are mutually independent, and two adjacent small modules are connected through a plastic sheet.
9. The method of claim 8, wherein the plastic sheet is sized to have a width of 0.05-0.1mm, a thickness <0.1mm, and a length equal to the small module length.
10. Use of an X-ray radiation protection module according to any one of claims 1-4, 6-9 for building an X-ray room or for producing an X-ray protection appliance.
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