CN115627087A - GF type radiation protection coating and preparation method thereof - Google Patents
GF type radiation protection coating and preparation method thereof Download PDFInfo
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- CN115627087A CN115627087A CN202211424516.XA CN202211424516A CN115627087A CN 115627087 A CN115627087 A CN 115627087A CN 202211424516 A CN202211424516 A CN 202211424516A CN 115627087 A CN115627087 A CN 115627087A
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/32—Radiation-absorbing paints
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/61—Additives non-macromolecular inorganic
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/60—Additives non-macromolecular
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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Abstract
The invention discloses a GF type radiation protection coating and a preparation method thereof, wherein the GF type radiation protection coating comprises the following components: the composite material comprises nano ferrite, ceramic particles, tungsten ore powder, erbium oxide, barium sulfate, ferric sulfate, tungsten alloy fibers, cement, diatom ooze, an accelerant, a binder, octaphenylamino polysilsesquioxane, graphite powder, nano zirconia particles and water. The GF type radiation protection coating has the advantages of large absorbable energy range, good absorption effect, great reduction of the emission of scattered rays, avoidance of secondary damage of scattered rays of workers or patients under the radiation of rays, high viscosity and reliable protection effect. The invention has the advantages of convenient construction, simple operation, good viscosity and easy construction.
Description
Technical Field
The invention belongs to the field of radiation protection materials, relates to a radiation protection material, and particularly relates to a GF type radiation protection coating and a preparation method thereof.
Background
Along with the development of science and technology, electronic devices are gradually applied to various industries, and have some worried aspects while bringing great convenience to human beings, wherein the most widely concerned is the problem that electromagnetic radiation affects human health.
Due to the radiation hazard, radiation-proof composite powder is smeared on walls in hospitals, factories, scientific research places and other places to reduce the hazard of radioactive rays as much as possible, and people are also increasingly applied to office places and family decoration at present. The radiation-proof composite powder can absorb electromagnetic wave energy projected on the surface of the radiation-proof composite powder, and can be converted into heat energy through material loss, so that the interference of clutter on self equipment is reduced, the damage of electromagnetic radiation on surrounding equipment and personnel is effectively prevented, in addition, the radiation-proof composite powder can be coated on complex curved surfaces, tiny corners and the like, a coating film is accurately and firmly formed, and the requirements of industrial, scientific and medical equipment are met.
For example, the chinese invention patent CN 101497757B discloses an aqueous radiation-proof paint, which comprises a main material of an electromagnetic wave absorbing functional material composed of scaly graphite powder, acetylene carbon powder, carbonyl iron powder and ferrite powder, and an auxiliary material including a diffusing agent, an adhesive, a film-forming agent, ammonia water and pure water, and can absorb electromagnetic waves without secondary electromagnetic pollution.
It is known that the conventional radiation protection materials have the following disadvantages in application: firstly, the protection effect is poor, and the whole specific gravity of the protection layer is reduced due to the addition of the river sand and the cement with low specific gravity, so that the protection effect is also greatly reduced; secondly, the painting layer is thick, in order to achieve the protection effect, the thickness of the painting layer usually reaches more than 20mm, the construction difficulty is increased, and the painting layer is too thick and airtight, so that cracking or falling off can be caused, the durability is poor, and the protection effect is greatly reduced; thirdly, the painting layer is uneven, the phenomena of pinholes, bubbles, whitening, light loss and the like are easy to occur, and the quality of the painting layer is poor. More seriously, in order to overcome the defects, some protective coatings adopt a large amount of lead added into barium sulfate or barite powder, so that the cost is increased, the protective coatings are soft, difficult and toxic to construct, the lead content in the air is increased, scattered rays can be caused, and the influence on the health of a human body is great.
In recent years, domestic factories have begun to use metal materials as raw materials for radiation-proof materials, which are mainly barium sulfate or barite powder, and river sand and cement are added to the raw materials and stirred to be painted on walls, ceilings or floors. For example, the Chinese invention patent CN 100588689C discloses an anti-radiation composite coating which comprises the following components: 15-25wt% of ferric oxide, and the granularity is 0.1mm-1.3mm; tungsten mineral powder accounts for 2.7-8wt%, and the particle size is 0.1-0.3 mm; rectorite ore accounts for 4 to 10 weight percent, and the granularity is 100 to 200 meshes; barium sulfate accounts for 40-50wt%, and the granularity is 0.1mm-2.0mm; ferric sulfate accounts for 0.7-1.3wt%, and the granularity is 1.0-1.5 mm; cement accounts for 20-25wt%; 0.5-0.9wt% of borax, which realizes lead-free treatment and has strong absorption effect on X, gamma, beta rays and radioactive nuclide sources, but adopts cement with low specific gravity as a bonding agent to reduce the integral specific gravity of the protective layer, so that the thickness of the painting layer still needs to reach more than 20mm to realize better protective effect, and the protective layer is easy to fall off and crack due to over thick painting, thereby increasing the construction difficulty and greatly reducing the protective effect; and the absorbed or reflected ray energy does not completely cover the energy spectrum range of medical X-ray, the defects generated when the traditional radiation protection material is applied are not solved, and the radiation protection material is not suitable for the workplaces of hospitals, factories, scientific research institutes and the like with X-rays, gamma-rays, beta-rays and radioactive nuclides.
Disclosure of Invention
The GF radiation protection coating has the advantages of large absorbable energy range, good absorption effect, high viscosity and reliable protection effect, and can greatly reduce the emission of scattered rays, avoid secondary damage of scattered rays of workers or patients under the radiation of rays.
In order to achieve the purpose, the invention adopts the following technical scheme:
a GF type radiation protection coating, which comprises the following components in parts by weight: 35-55 parts of nano ferrite, 22-30 parts of ceramic particles, 25-30 parts of tungsten mineral powder, 1-5 parts of erbium oxide, 15-20 parts of barium sulfate, 15-20 parts of ferric sulfate, 2-6 parts of tungsten alloy fibers, 10-15 parts of cement, 7-12 parts of diatom ooze, 1-5 parts of an accelerator, 1-5 parts of a binder, 1-3 parts of octaphenylamino polysilsesquioxane, 0.5-3 parts of graphite powder, 0.1-0.3 part of nano zirconium oxide particles and 50-80 parts of water.
As a preferable scheme of the invention, the GF type radiation protection coating comprises the following components in parts by weight: 40-55 parts of nano ferrite, 25-30 parts of ceramic particles, 25-28 parts of tungsten mineral powder, 1-3 parts of erbium oxide, 15-18 parts of barium sulfate, 18-20 parts of ferric sulfate, 2-5 parts of tungsten alloy fiber, 10-15 parts of cement, 7-12 parts of diatom ooze, 1-5 parts of accelerator, 1-5 parts of binder, 1-3 parts of octaphenylamino polysilsesquioxane, 0.5-1 part of graphite powder, 0.1-0.2 part of nano zirconium oxide particles and 50-80 parts of water.
As a preferable scheme of the invention, the GF type radiation protection coating comprises the following components in parts by weight: 45 parts of nano ferrite, 25 parts of ceramic particles, 28 parts of tungsten mineral powder, 3 parts of erbium oxide, 18 parts of barium sulfate, 18 parts of ferric sulfate, 5 parts of tungsten alloy fiber, 12 parts of cement, 10 parts of diatom ooze, 3 parts of accelerator, 3 parts of binder, 2 parts of octaphenyl amino polysilsesquioxane, 1.5 parts of graphite powder, 0.2 part of nano zirconium oxide particles and 65 parts of water.
In the invention, the octaphenylamino polysilsesquioxane (OAPPOSS) contains a plurality of functional groups which can participate in epoxy curing, can be well dispersed in an epoxy matrix, and the OAPPOSS has eight benzene ring structures, and the pi bond on the benzene ring can ensure that the radiation energy received by individual electrons can be uniformly dispersed to all electrons on the pi bond, thereby reducing the chain breakage of local C-C bonds caused by excitation and improving the radiation resistance of the material.
In a preferable embodiment of the invention, the accelerator is N, N-tetramethyl dithiobis-thionamine, and the binder is one of polyvinyl alcohol, 107 polymer rubber powder, 801 polymer rubber powder, 901 polymer rubber powder or M40 polymer rubber powder.
In a preferred embodiment of the present invention, the particle size of the iron sulfate is 1.0mm to 1.5mm, the particle size of the barium sulfate is 0.5mm to 1.2mm, the particle size of the ceramic particle is 1.2mm to 1.5mm, and the particle size of the graphite powder is 0.3 μm to 0.5 μm.
As a preferable embodiment of the present invention, the preparation method of the octaphenylamino polysilsesquioxane is:
(1) Dispersing 5-10g octaphenyl polysilsesquioxane in 30-60mL nitric acid solution in ice water bath, and uniformly stirring for 30min;
(2) Continuously reacting the OPS nitric acid solution for 15-30h at room temperature, carrying out suction filtration and washing for 3-5 times to obtain yellow precipitate;
(3) Placing 5-10g of the yellow precipitate obtained in the step (2) and 0.5-2g of palladium-carbon catalyst into a round-bottom flask, adding 10-20mL of tetrahydrofuran and 10-20mL of triethylamine under the protection of argon, heating the reaction solution to 60 ℃, adding 4-10mL of formic acid, and continuing to react for 5-10h;
(4) After the reaction is finished, filtering, and washing for 3-5 times by using ethyl acetate and water respectively to obtain octaphenylamino polysilsesquioxane which is light yellow solid.
As a preferable scheme of the present invention, the preparation method of the nano zirconia particles comprises:
1) Dissolving imidazole ligand and polyethyleneimine in a solvent at room temperature to obtain a mixed solution of the imidazole ligand and the polyethyleneimine for later use;
2) Dissolving zirconium silicate in a solvent at room temperature to obtain a zirconium salt solution for later use;
3) Quickly pouring the mixed solution of imidazole ligand and polyethyleneimine obtained in the step 1) into the zirconium salt solution obtained in the step 2), and stirring for reaction to obtain a pre-reaction solution;
4) Centrifuging the pre-reaction solution reacted in the step 3), and heating and washing the centrifuged precipitate;
5) And (3) grinding the washed precipitate obtained in the step (4) at low temperature, and finally sintering at 450-550 ℃ for 2-4 hours to obtain the nano zirconia particles.
The invention provides a preparation method of the GF type radiation protection coating, which comprises the following steps:
1) Mixing and stirring nano ferrite, ceramic particles, tungsten mineral powder, erbium oxide, barium sulfate, ferric sulfate, tungsten alloy fibers, cement, a promoter and a binder with part of water uniformly to obtain a first premix;
2) Adding octaphenylamino polysilsesquioxane and diatom ooze into the first premix, adding the rest water, and uniformly mixing and stirring to obtain a second premix;
3) And adding the accelerator, graphite powder and the nano zirconia particles into the second premix, and uniformly mixing and stirring to obtain the GF type radiation protective coating.
As a preferable scheme of the invention, in the step 1), the stirring speed is 900-1200 r/min; in the step 2), the stirring speed is 1500-2000 r/min; in the step 3), the stirring speed is 600-800r/min.
As a preferable scheme of the invention, in the step 3), before the accelerator, the graphite powder and the nano zirconia particles are added, the second premix is heated to 65-80 ℃.
Compared with the prior art, the invention has the following beneficial effects:
1) The GF type radiation protection coating has the advantages of large absorbable energy range, good absorption effect, great reduction of the emission of scattered rays, avoidance of secondary damage of scattered rays of workers or patients under the radiation of rays, high viscosity and reliable protection effect.
2) The invention has the advantages of convenient construction, simple operation, good viscosity and easy construction.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The raw materials used in the present invention are all commercially available.
The preparation method of the nano ferrite comprises the following steps:
11.92g FeCl3.6H2O and 3.66g FeSO4.7H2O are dissolved in 50mL of distilled water, mechanically stirred for 30min under nitrogen atmosphere and heated to 60 ℃; slowly adding 7.7mL of NH 3. H2O with the mass fraction of 25%, reacting for 1H, adding 2.5mL of oleic acid, heating to 70 ℃, and curing for 1H to obtain the nano ferrite with the size of 5-10 nm. And washing the oleic acid modified nano ferrite with absolute ethyl alcohol for 3 times, and drying in vacuum for later use.
In the invention, the preparation method of the octaphenylamino polysilsesquioxane comprises the following steps:
(1) Dispersing 5-10g octaphenyl polysilsesquioxane in 30-60mL nitric acid solution in ice water bath, and uniformly stirring for 30min;
(2) Continuously reacting the OPS nitric acid solution for 15-30h at room temperature, carrying out suction filtration and washing for 3-5 times to obtain yellow precipitate;
(3) Placing 5-10g of the yellow precipitate obtained in the step (2) and 0.5-2g of palladium-carbon catalyst into a round-bottom flask, adding 10-20mL of tetrahydrofuran and 10-20mL of triethylamine under the protection of argon, heating the reaction solution to 60 ℃, adding 4-10mL of formic acid, and continuing to react for 5-10h;
(4) After the reaction is finished, filtering, and washing for 3-5 times by using ethyl acetate and water respectively to obtain octaphenylamino polysilsesquioxane which is light yellow solid.
In the invention, the preparation method of the nano zirconia particles comprises the following steps:
1) Dissolving imidazole ligand and polyethyleneimine into a solvent at room temperature to obtain a mixed solution of imidazole ligand and polyethyleneimine for later use;
2) Dissolving zirconium silicate in a solvent at room temperature to obtain a zirconium salt solution for later use;
3) Quickly pouring the mixed solution of the imidazole ligand and the polyethyleneimine obtained in the step 1) into the zirconium salt solution obtained in the step 2), and stirring for reaction to obtain a pre-reaction solution;
4) Centrifuging the pre-reaction solution after the reaction in the step 3), and heating and washing the centrifuged precipitate;
5) And (3) grinding the precipitate washed in the step 4) at low temperature, and finally sintering at 450-550 ℃ for 2-4 hours to obtain the nano zirconium oxide particles.
In the invention, the granularity of ferric sulfate is 1.0-1.5 mm, the granularity of barium sulfate is 0.5-1.2 mm, the granularity of ceramic particles is 1.2-1.5 mm, the granularity of graphite powder is 0.3-0.5 μm, and the cement is limestone silicate cement.
Example 1
The embodiment provides a GF type radiation protection coating, which comprises the following components in parts by weight: 35 parts of nano ferrite, 30 parts of ceramic particles, 25 parts of tungsten mineral powder, 1 part of erbium oxide, 20 parts of barium sulfate, 15 parts of ferric sulfate, 2 parts of tungsten alloy fiber, 10 parts of cement, 12 parts of diatom ooze, 1 part of accelerator, 5 parts of binder, 1 part of octaphenyl amino polysilsesquioxane, 0.5 part of graphite powder, 0.1 part of nano zirconium oxide particles and 50 parts of water.
The preparation method of the GF type radiation protection coating comprises the following steps:
1) Mixing and stirring nano ferrite, ceramic particles, tungsten mineral powder, erbium oxide, barium sulfate, ferric sulfate, tungsten alloy fibers, cement, an accelerant, a binder and part of water uniformly at the stirring speed of 900r/min to obtain a first premix;
2) Adding octaphenyl amino polysilsesquioxane and diatom ooze into a first premix, adding the rest water, and uniformly mixing and stirring at the stirring speed of 1500r/min to obtain a second premix;
3) And heating the second premix to 65 ℃, adding the accelerator, graphite powder and nano zirconia particles into the second premix, and uniformly mixing and stirring at the stirring speed of 600r/min to obtain the GF type radiation protective coating.
Example 2
The embodiment provides a GF type radiation protection coating, which comprises the following components in parts by weight: 55 parts of nano ferrite, 30 parts of ceramic particles, 28 parts of tungsten mineral powder, 3 parts of erbium oxide, 15 parts of barium sulfate, 20 parts of ferric sulfate, 4 parts of tungsten alloy fiber, 15 parts of cement, 7 parts of diatom ooze, 5 parts of accelerator, 5 parts of binder, 3 parts of octaphenyl amino polysilsesquioxane, 1 part of graphite powder, 0.15 part of nano zirconium oxide particles and 80 parts of water.
The preparation method of the GF type radiation protection coating comprises the following steps:
1) Mixing and stirring nano ferrite, ceramic particles, tungsten mineral powder, erbium oxide, barium sulfate, ferric sulfate, tungsten alloy fibers, cement, an accelerant and a binder with part of water uniformly at the stirring speed of 1000r/min to obtain a first premix;
2) Adding octaphenyl amino polysilsesquioxane and diatom ooze into a first premix, adding the rest water, and uniformly mixing and stirring at the stirring speed of 1800r/min to obtain a second premix;
3) And heating the second premix to 70 ℃, adding the accelerator, graphite powder and the nano zirconia particles into the second premix, and uniformly mixing and stirring at the stirring speed of 650r/min to obtain the GF type radiation protective coating.
Example 3
The embodiment provides a GF type radiation protection coating, which comprises the following components in parts by weight: 45 parts of nano ferrite, 25 parts of ceramic particles, 28 parts of tungsten mineral powder, 3 parts of erbium oxide, 18 parts of barium sulfate, 18 parts of ferric sulfate, 5 parts of tungsten alloy fiber, 12 parts of cement, 10 parts of diatom ooze, 3 parts of accelerator, 3 parts of binder, 2 parts of octaphenyl amino polysilsesquioxane, 1.5 parts of graphite powder, 0.2 part of nano zirconium oxide particles and 65 parts of water.
The preparation method of the GF type radiation protection coating comprises the following steps:
1) Mixing and stirring nano ferrite, ceramic particles, tungsten mineral powder, erbium oxide, barium sulfate, ferric sulfate, tungsten alloy fibers, cement, a promoter and a binder with part of water uniformly at the stirring speed of 1200r/min to obtain a first premix;
2) Adding octaphenyl amino polysilsesquioxane and diatom ooze into a first premix, adding the rest water, and uniformly mixing and stirring at the stirring speed of 2000r/min to obtain a second premix;
3) And heating the second premix to 80 ℃, adding the accelerator, graphite powder and nano zirconia particles into the second premix, and uniformly mixing and stirring at the stirring speed of 800r/min to obtain the GF type radiation protective coating.
Comparative example 1, made of ordinary barium sulfate.
The GF type radiation protective coating obtained in examples 1 to 3 and the ordinary barium sulfate of comparative example 1 were made into 10mm × 200mm small samples, and radiation protective effect detection and radiation absorption effect detection were performed, main instrumentation was detected: NE2550 secondary standard dosimeter J-067; the detection results of a DCI8500 precision current integrator TK30 ionization chamber J-102 under the conditions of 120kV and 2.5mmA1 are shown in Table 1.
TABLE 1 test results
| Lead equivalent (120kV, 2.5mmA1) | Absorption rate of X-ray | |
| Example 1 | 1.99mmPb | 89.4％ |
| Example 2 | 2.15mmPb | 92.7％ |
| Example 3 | 2.92mmPb | 95.3％ |
| Comparative example 1 | 0.75mmPb | 15.1％ |
As can be seen from Table 1, the GF type radiation protective coating has the advantages of large absorbable energy range, good absorption effect, great reduction of the emission of scattered rays, avoidance of secondary damage of scattered rays of workers or patients under the radiation of rays, high viscosity and reliable protection effect.
The GF radiation protective coatings of examples 1-3 were tested for quality and technical properties, and the results are shown in Table 2.
TABLE 2 quality and technical Performance test results
| Item | Example 1 | Example 2 | Example 3 |
| Apparent density delta (kg/m) 3 ) | 3750 | 3900 | 3980 |
| Lead equivalent (Pb/10 mm) | ≥1.2 | ≥1.2 | ≥1.2 |
| Content of mud cake (by mass,%) | ≤0.5 | ≤0.2 | ≤0.2 |
| Radioactivity | Qualified | Qualified | Qualified |
It can be seen that the GF radiation protective coatings prepared in examples 1 to 3 of the present invention at least meet the standard of grade II barium sulfate coatings, wherein the GF radiation protective coatings prepared in examples 2 and 3 are superior to the standard of grade I barium sulfate coatings.
The GF type radiation protection coating has the advantages of large absorbable energy range, good absorption effect, great reduction of the emission of scattered rays, avoidance of secondary damage of scattered rays of workers or patients under the radiation of rays, high viscosity and reliable protection effect.
While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that the foregoing and other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.
Claims (10)
1. The GF type radiation protection coating is characterized by comprising the following components in parts by weight: 35-55 parts of nano ferrite, 22-30 parts of ceramic particles, 25-30 parts of tungsten mineral powder, 1-5 parts of erbium oxide, 15-20 parts of barium sulfate, 15-20 parts of ferric sulfate, 2-6 parts of tungsten alloy fibers, 10-15 parts of cement, 7-12 parts of diatom ooze, 1-5 parts of an accelerator, 1-5 parts of a binder, 1-3 parts of octaphenylamino polysilsesquioxane, 0.5-3 parts of graphite powder, 0.1-0.3 part of nano zirconium oxide particles and 50-80 parts of water.
2. The GF radiation protective coating according to claim 1, wherein the GF radiation protective coating comprises, in parts by weight: 40-55 parts of nano ferrite, 25-30 parts of ceramic particles, 25-28 parts of tungsten mineral powder, 1-3 parts of erbium oxide, 15-18 parts of barium sulfate, 18-20 parts of ferric sulfate, 2-5 parts of tungsten alloy fiber, 10-15 parts of cement, 7-12 parts of diatom ooze, 1-5 parts of accelerator, 1-5 parts of binder, 1-3 parts of octaphenylamino polysilsesquioxane, 0.5-1 part of graphite powder, 0.1-0.2 part of nano zirconium oxide particles and 50-80 parts of water.
3. A GF-type radiation protective coating according to claim 1, wherein the GF-type radiation protective coating comprises, in parts by weight: 45 parts of nano ferrite, 25 parts of ceramic particles, 28 parts of tungsten mineral powder, 3 parts of erbium oxide, 18 parts of barium sulfate, 18 parts of ferric sulfate, 5 parts of tungsten alloy fiber, 12 parts of cement, 10 parts of diatom ooze, 3 parts of accelerator, 3 parts of binder, 2 parts of octaphenyl amino polysilsesquioxane, 1.5 parts of graphite powder, 0.2 part of nano zirconium oxide particles and 65 parts of water.
4. The GF type radiation protective coating according to claim 1, 2 or 3, wherein the accelerant is N, N-tetramethyl dithiobis-thionamine, and the binder is one of polyvinyl alcohol, 107 polymer rubber powder, 801 polymer rubber powder, 901 polymer rubber powder or M40 polymer rubber powder.
5. A GF-type radiation protective coating according to claim 1, 2 or 3, characterized in that the particle size of the iron sulfate is 1.0mm to 1.5mm, the particle size of the barium sulfate is 0.5mm to 1.2mm, the particle size of the ceramic particles is 1.2mm to 1.5mm, and the particle size of the graphite powder is 0.3 μm to 0.5 μm.
6. A GF-type radiation protective coating according to claim 1, 2 or 3, wherein said octaphenylamino polysilsesquioxane is prepared by:
(1) Dispersing 5-10g octaphenyl polysilsesquioxane in 30-60mL nitric acid solution in ice water bath, and uniformly stirring for 30min;
(2) Continuously reacting the OPS nitric acid solution for 15-30h at room temperature, carrying out suction filtration and washing for 3-5 times to obtain yellow precipitate;
(3) Placing 5-10g of the yellow precipitate obtained in the step (2) and 0.5-2g of palladium-carbon catalyst into a round-bottom flask, adding 10-20mL of tetrahydrofuran and 10-20mL of triethylamine under the protection of argon, heating the reaction solution to 60 ℃, adding 4-10mL of formic acid, and continuing to react for 5-10h;
(4) After the reaction is finished, filtering, and washing for 3-5 times by using ethyl acetate and water respectively to obtain octaphenylamino polysilsesquioxane which is light yellow solid.
7. The GF radiation protective coating according to claim 1, 2 or 3, wherein the nano zirconia particles are prepared by the following steps:
1) Dissolving imidazole ligand and polyethyleneimine in a solvent at room temperature to obtain a mixed solution of the imidazole ligand and the polyethyleneimine for later use;
2) Dissolving zirconium silicate in a solvent at room temperature to obtain a zirconium salt solution for later use;
3) Quickly pouring the mixed solution of the imidazole ligand and the polyethyleneimine obtained in the step 1) into the zirconium salt solution obtained in the step 2), and stirring for reaction to obtain a pre-reaction solution;
4) Centrifuging the pre-reaction solution reacted in the step 3), and heating and washing the centrifuged precipitate;
5) And (3) grinding the precipitate washed in the step 4) at low temperature, and finally sintering at 450-550 ℃ for 2-4 hours to obtain the nano zirconium oxide particles.
8. A process for the preparation of a GF-type radiation protective coating according to any one of claims 1 to 7, characterized in that it comprises the following steps:
1) Mixing and stirring nano ferrite, ceramic particles, tungsten mineral powder, erbium oxide, barium sulfate, ferric sulfate, tungsten alloy fibers, cement, an accelerant and a binder with part of water uniformly to obtain a first premix;
2) Adding octaphenylamino polysilsesquioxane and diatom ooze into the first premix, adding the remaining water, and uniformly mixing and stirring to obtain a second premix;
3) And adding the accelerator, graphite powder and the nano zirconia particles into the second premix, and uniformly mixing and stirring to obtain the GF type radiation protective coating.
9. The method for preparing GF type radiation protective coating according to claim 8, wherein in step 1), the stirring speed is 900-1200 r/min; in the step 2), the stirring speed is 1500-2000 r/min; in the step 3), the stirring speed is 600-800r/min.
10. The method according to claim 8, wherein in step 3), the second premix is heated to 65-80 ℃ before the accelerator, the graphite powder and the nano zirconia particles are added.
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| CN105820707A (en) * | 2016-04-01 | 2016-08-03 | 厦门大学 | Graphene-doped anti-radiation coating and preparation method thereof |
| CN110183177A (en) * | 2019-05-29 | 2019-08-30 | 天一瑞邦环境工程有限公司 | A kind of GF type radiation shielding coating |
| CN112662165A (en) * | 2020-12-21 | 2021-04-16 | 安徽凯沃科技有限公司 | Polyurethane mountain rock bulletproof radiation-proof wallboard |
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| CN102364616A (en) * | 2011-09-22 | 2012-02-29 | 华南师范大学 | Nanometer composite material Fe3O4@PS@Ag with core-shell structure and preparation method thereof |
| CN105820707A (en) * | 2016-04-01 | 2016-08-03 | 厦门大学 | Graphene-doped anti-radiation coating and preparation method thereof |
| CN110183177A (en) * | 2019-05-29 | 2019-08-30 | 天一瑞邦环境工程有限公司 | A kind of GF type radiation shielding coating |
| CN112662165A (en) * | 2020-12-21 | 2021-04-16 | 安徽凯沃科技有限公司 | Polyurethane mountain rock bulletproof radiation-proof wallboard |
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