NL2031238B1 - Crystalline or gel-like artificial snow material - Google Patents
Crystalline or gel-like artificial snow material Download PDFInfo
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Abstract
The present disclosure relates to four types of artificial snow materials. In the present disclosure, by selecting the appropriate type of cross-linking or gel system and reasonably adjusting the ratio of cross-linking or gel system, additives and water, the liquid water in the artificial snow can be effectively locked, so that the obtained artificial snow is closer to the natural snow in the appearance and touch feeling, does not lose water or release water after the temperature is raised, and can maintain the shape for a long time. Furthermore, by adding a foaming agent or a solidification temperature and transmittance regulator into the artificial snow material, the light transmittance of artificial snow is further improved, so that the artificial snow has the light transmittance of ice before solidification and the whiteness of snow after solidification, and is closer to the natural snow in appearance.
Description
CRYSTALLINE OR GEL-LIKE ARTIFICIAL SNOW MATERIAL
[0001] The present disclosure relates to the technical field of preparation and processing of new materials, particularly to a crystalline or gel-like artificial snow material.
[0002] Artificial snow is widely used in ski resorts, drifting snow landscapes, snow environment simulation, etc. Presently, artificial snow is mainly prepared in two ways: one 1s to break the ice cubes into ice crystals of suitable thickness and width; the other is to spray water into the cold atmosphere with a high-pressure water gun to form ice crystals of suitable size, so as to achieve the visual and functional effects of natural snow.
However, since the above ice crystals are directly frozen from water, which are melted into water, cannot maintain their shape and cannot be stored for a long time once the temperature is raised.
[0003] The Chinese patent CN104861931 A discloses a method for preparing artificial snow. The raw materials are sequentially subjected to a batching process, a mixing process and a pre-sintering process to obtain pre-sintered pellets, and then the pre- sintered pellets are used as a magnetic matrix for artificial snow to carry out powder coating process. After the powder coating process is completed, the shaped artificial snow with high coverage rate is obtained. The artificial snow can maintain the shape for a long time, but the compositions of the above artificial snow are quite different from those of the natural snow, and the touch feeling of the artificial snow is quite different from that of natural snow.
[0004] In summary, the existing artificial snow materials cannot give consideration to the characteristics that the appearance and touch feeling are close to natural snow and that they do not lose water or release water.
[0005] In view of this, the present disclosure provides a crystalline or gel-like artificial snow material. The artificial snow provided by the present disclosure is close to natural snow in appearance and touch feeling, does not lose water or release water after the temperature is raised, and can maintain the shape for a long time.
[0006] In order to achieve the above object, the present disclosure adopts the following technical solutions:
[0007] A polyacrylamide crystalline artificial snow material is prepared by the following raw materials of an acrylamide polymerizable monomer, a crosslinking agent, an initiating agent, a catalyst, a foaming agent, aluminum-free carbonate, an aluminum salt, a foam stabilizer, and water in a mass ratio of (5-25): (0.02-0.1): (0.01-0.2): (0.001- 0.02): (0.01-5.0): (0.1-5.2): (0.05-2.6): (0.02-1.5):100.
[0008] A sodium alginate crystalline artificial snow material is prepared by the following raw materials of sodium alginate, a solubilizing agent, a soluble divalent/trivalent metal ion salt, a cross-linking speed regulator, a plasticizer, a gelatinizing agent, a foaming agent, aluminum-free carbonate, an aluminum salt, a foam stabilizer and water in a mass ratio of 1.0: (2.5-6.5): (0.02-0.5): (0.001-0.5): (0-0.2): (0- 0.2): (0.01-0.25): (0.01-0.52): (0.005-0.26): (0.002-0.15): (10-100).
[0009] A polyacrylamide gel-like artificial snow material is prepared by the following raw materials of an acrylamide polymerizable monomer, a crosslinking agent, an initiating agent, a catalyst, a solidification temperature and transmittance regulator, and water in a mass ratio of (5-25): (0.02-0.1): (0.01-0.2): (0.001-0.02): (0.1-30):100.
[0010] A sodium alginate gel-like artificial snow material is prepared by the following raw materials of sodium alginate, a solubilizing agent, a soluble divalent/trivalent metal ion salt, a cross-linking speed regulator, a plasticizer, a gelatinizing agent, a solidification temperature and transmittance regulator, and water in a mass ratio of 1.0: (2.5-6.5): (0.02-0.5): (0.001-0.5): (0-0.2): (0-0.2): (0.05-0.3): (10-100).
[0011] Preferably, the acrylamide polymerizable monomer comprises acrylamide and/or N-isopropylacrylamide; the foaming agent comprises one of more of tea saponin,
sodium dodecylbenzene sulfonate, sodium dodecyl sulfate, an animal and vegetable protein foaming agent, a rosin soap foaming agent and sodium alcohol ether sulphate; the foam stabilizer comprises one or more of carboxymethyl cellulose, polyvinyl alcohol, lauric acid, triethanolamine and gelatin.
[0012] Preferably, the solidification temperature and transmittance regulator comprises chlorate and/or polyol.
[0013] The present disclosure provides four types of artificial snow materials.
According to the present disclosure, by selecting the appropriate type of cross-linking or gel system and reasonably adjusting the ratio of cross-linking or gel system, additives and water, the liquid water in the artificial snow can be effectively locked, so that the obtained artificial snow is closer to the natural snow in the appearance and touch feeling, does not lose water or release water after the temperature is raised, and can maintain the shape for a long time. Furthermore, by adding a foaming agent or a solidification temperature and transmittance regulator into the artificial snow material, the light transmittance of artificial snow is further improved, so that the artificial snow has the light transmittance of ice before solidification and the whiteness of snow after solidification, and is closer to the natural snow in appearance.
[0014] The present disclosure provides a polyacrylamide crystalline artificial snow material (hereinafter referred to as the first artificial snow material), which is prepared by the following raw materials of an acrylamide polymerizable monomer, a crosslinking agent, an initiating agent, a catalyst, a foaming agent, aluminum-free carbonate, an aluminum salt, a foam stabilizer, and water in a mass ratio of (5-25): (0.02-0.1): (0.01- 0.2): (0.001-0.02): (0.01-5.0): (0.1-5.2): (0.05-2.6): (0.02-1.5): 100.
[0015] Unless otherwise specified, the raw materials used in the present disclosure are all commercially available.
[0016] In the present disclosure, the acrylamide polymerizable monomer preferably comprises acrylamide and/or N-isopropylacrylamide; the crosslinking agent preferably comprises one or more of N,N-methylenebisacrylamide, N-methylol acrylamide, diacetone acrylamide, hydroxyethyl methacrylate and hydroxypropyl methacrylate; the initiating agent comprises a thermal initiating agent or a light initiating agent, the thermal initiating agent preferably comprises one or more of potassium persulfate, sodium persulfate and ammonium persulfate; the light initiating agent preferably comprises 2- ketoglutaric acid and/or 2-hydroxy-4-(2-hydroxyethoxy) -2-methylpropiophenone; the catalyst preferably comprises tetramethylethylenediamine. In the present disclosure, the above types of acrylamide polymerizable monomer, crosslinking agent, initiating agent and catalyst are preferably subjected to cross-linking reaction according to the above mass ratio to obtain the cross-linking system in the artificial snow material, so that the prepared cross-linking system has good water-locking ability, and the artificial snow will not lose water or release water, and can maintain its shape for a long time.
[0017] In the present disclosure, the foaming agent preferably comprises one or more of tea saponin, sodium dodecylbenzene sulfonate, sodium dodecyl sulfate, an animal and vegetable protein foaming agent, a rosin soap foaming agent and sodium alcohol ether sulphate; the aluminium-free carbonate preferably comprises sodium carbonate and/or potassium carbonate; the preferred aluminum salt comprises aluminum chloride or aluminum sulfate; the foam stabilizer preferably comprises one or more of carboxymethyl cellulose, polyvinyl alcohol, lauric acid, triethanolamine and gelatin. By adding a foaming agent, a foam stabilizer, carbonate and aluminum salt, a large number of pores at the sub-millimeter, micron, and even nanometer scales are formed inside the artificial snow, which effectively improve the light transmittance of artificial snow and makes the artificial snow to be closer to the natural snow in appearance.
[0018] In the present disclosure, the method for preparing the first artificial snow described in the above technical solution preferably comprises the following steps:
[0019] mixing the raw materials according to the mass ratio to obtain an artificial snow precursor solution;
[0020] injecting the artificial snow precursor solution into a container or a mold, and performing a curing reaction to obtain an artificial snow material.
[0021] In the present disclosure, there is no special requirement for the state of the artificial snow mixture, as long as the solid particles are completely dissolved. In the present disclosure, the artificial snow precursor solution is preferably obtained by vacuum degassing treatment after the mixing. In the present disclosure, the air content inthe precursor solution is preferably reduced by vacuum degassing treatment, which is conducive to the formation of uniformly distributed pores in the foaming agent.
[0022] In the present disclosure, a container or mold with an opening is preferably used. In the present disclosure, the artificial snow precursor solution is preferably injected into a container or a mold, and a glass sheet that is subjected to surface hydrophobic treatment is placed above the container or mold. By adding the glass sheet that is subjected to surface hydrophobic treatment above the container or mold, the escape of artificial snow during shaping can be prevented, to form a regular shape; furthermore, the glass sheet that is subjected to surface hydrophobic treatment can be effectively separated from the artificial snow material, to facilitate to take out the artificial snow material. The present disclosure has no special requirements on the shape of the container or the mold, and it is subjected to the shape required by those skilled in the art.
[0023] In the present disclosure, the curing reaction is preferably a photocuring reaction or a thermal curing reaction. In the present disclosure, when the curing reaction is a photocuring reaction, the wavelength of the photocuring reaction is preferably 365- 405 nm, and the time is preferably 0.5-2 h; when the curing reaction is thermal curing reaction, the heating temperature is preferably 40-70°C, and the time is preferably 1-3 h.
[0024] The present disclosure provides a polyacrylamide gel-like artificial snow material (hereinafter referred to as the second artificial snow material), which is prepared by the following raw materials of an acrylamide polymerizable monomer, a crosslinking agent, an initiating agent, a catalyst, a solidification temperature and transmittance regulator and water in a mass ratio of (5-25): (0.02-0.1): (0.01-0.2): (0.001-0.02}: (0.1- 30):100.
[0025] In the present disclosure, among the raw materials for preparing the second artificial snow material, the types of the acrylamide polymerizable monomer, the crosslinking agent, the initiating agent and the catalyst are the same as those for preparing the first artificial snow material.
[0026] In the present disclosure, the solidification temperature and transmittance regulator preferably comprises chlorate and/or polyol, and the chlorate preferably comprises one or more of sodium chloride, calcium chloride, lithium chloride, potassium chloride and magnesium chloride, the polyol preferably comprises ethylene glycol and/or glycerol. In the present disclosure, preferably, by adjusting the type and content of the solidification temperature and transmittance regulator, the influence of the ambient temperature on the artificial snow material is weakened and the light transmittance of the artificial snow is improved, thereby prolonging the service life of the artificial snow.
[0027] In the present disclosure, the preparation method of the second artificial snow material is the same as that of the first artificial snow material.
[0028] The present disclosure provides a sodium alginate crystalline artificial snow material (hereinafter referred to as the third artificial snow material), which is prepared by the following raw materials of sodium alginate, a solubilizing agent, a soluble divalent/trivalent metal ion salt, a cross-linking speed regulator, a plasticizer, a gelatinizing agent, a foaming agent, aluminum-free carbonate, an aluminum salt, a foam stabilizer, and water in a mass ratio of 1.0: (2.5-6.5): (0.02-0.5): (0.001-0.5): (0-0.2): (0- 0.2): (0.01-0.25): (0.01-0.52): (0.005-0.26): (0.002-0.15): (10-100),
[0029] In the present disclosure, the solubilizing agent preferably comprises one or more of white soft sugar, glucose, fructose, maltose, sucrose and lactose; the soluble divalent metal ion salt preferably comprises one or more of calcium salt, magnesium salt, ferrous salt, the soluble trivalent metal ion salt preferably comprises one of aluminum salt and iron salt, and the calcium salt preferably comprises one or more of calcium sulfate, calcium chloride, calcium bromide, calcium iodide, calcium nitrate, calcium formate and calcium acetate; the cross-linking speed regulator preferably comprises tetrasodium pyrophosphate; the plasticizer preferably comprises one or more of corn starch, tapioca starch, wheat flour and diatomaceous earth; the gelatinizing agent preferably comprises one or more of xanthan gum, pectin and carrageenan.
[0030] In the present disclosure, among the raw materials for preparing the third artificial snow material, the types of the foaming agent, aluminum-free carbonate, the aluminum salt and the foam stabilizer are the same as those for preparing the first artificial snow material.
[0031] In the present disclosure, the method for preparing the third artificial snow material described in the above technical solution preferably comprises the following steps:
[0032] mixing the raw materials according to the mass ratio to obtain an artificial snow precursor solution;
[0033] injecting the artificial snow precursor solution into a container or a mold, and performing a cross-linking reaction to obtain a sodium alginate crystalline artificial snow material.
[0034] In the present disclosure, preferably, the specific method of mixing is: performing the first mixing of sodium alginate, the solubilizing agent, the soluble divalent/trivalent metal ion salt, the cross-linking speed regulator, the plasticizer, the gelatinizing agent, the foaming agent, aluminum-free carbonate, the aluminum salt and the foam stabilizer according to a certain mass ratio, to obtain mixed powder, then performing the second mixing of the mixed powder and water to obtain the artificial snow precursor solution. In the present disclosure, there is no special requirement for the state of the artificial snow mixture, as long as the powder particles are completely dissolved.
[0035] In the present disclosure, the artificial snow precursor solution is preferably obtained by vacuum degassing treatment after the mixing.
[0036] In the present disclosure, the type of the container or mold is the same as the type of the container or mold used for preparing the first artificial snow material.
[0037] Inthe present disclosure, the time of the cross-linking reaction is preferably 5-
30 min, and the temperature is preferably room temperature.
[0038] The present disclosure also provides a sodium alginate gel-like artificial snow material (hereinafter referred to as the fourth artificial snow material), which is prepared by the following raw materials of sodium alginate, a solubilizing agent, a soluble divalent/trivalent metal ion salt , a cross-linking speed regulator, a plasticizer, a gelatinizing agent, a solidification temperature and transmittance regulator, and water in a mass ratio of 1.0: (2.5-6.5). (0.02-0.5): (0.001-0.5): (0-0.2): (0-0.2): (0.05-0.3): (10- 100).
[0039] Inthe present disclosure, among the raw materials used for preparing the fourth artificial snow material, the types of sodium alginate, the solubilizing agent, the soluble divalent/trivalent metal ion salt, the cross-linking speed regulator, the plasticizer, the gelatinizing agent are the same as those for preparing the third artificial snow material.
[0040] Inthe present disclosure, among the raw materials used for preparing the fourth artificial snow material, the type of the solidification temperature and transmittance regulator is the same as that for preparing the second artificial snow material.
[0041] In the present disclosure, the method for preparing the fourth artificial snow material described in the above technical solution preferably comprises the following steps:
[0042] mixing the raw materials according to the mass ratio to obtain an artificial snow precursor solution;
[0043] injecting the artificial snow precursor solution into a container or a mold, and performing a cross-linking reaction to obtain a sodium alginate gel-like artificial snow material.
[0044] In the present disclosure, preferably, the specific method of mixing is: performing the first mixing of sodium alginate, the solubilizing agent, the soluble divalent/trivalent metal ion salt, the cross-linking speed regulator, the plasticizer and the gelatinizing agent to obtain mixed powder; performing the second mixing of the solidification temperature and transmittance regulator and water to obtain a conditioning solution; and then performing the third mixing of the conditioning solution and the mixed powder to obtain an artificial snow mixture. In the present disclosure, there is no special requirement for the state of the artificial snow mixture, as long as the powder particles are completely dissolved.
[0045] In the present disclosure, preferably the artificial snow mixture is obtained by vacuum degassing treatment after the mixing.
[0046] In the present disclosure, the type of the container or mold is the same as that for preparing the first artificial snow material.
[0047] In the present disclosure, the time of the cross-linking reaction is preferably 5- 30 min, and the temperature is preferably room temperature.
[0048] In the present disclosure, sodium alginate is preferably used as the main structure to construct a three-dimensional network structure, so that the prepared artificial snow material has the characteristics of reversible conversion of ice and snow states, and with the foaming system or the solidification temperature and transmittance regulator, the artificial snow has the light transmittance of ice before solidification and the whiteness of snow after solidification, does not release water or lose water after melting, can maintain its original shape, expands the application scenarios, and has good processability.
[0049] The technical solutions of the present disclosure will be clearly and completely described below with reference to the embodiments of the present disclosure.
[0050] Example 1
[0051] A method for preparing a polyacrylamide crystalline artificial snow material is as follows: dissolve 5 g of acrylamide, 0.03 g of N,N-methylenebisacrylamide, 0.01 g of 2-ketoglutaric acid, 0.001 g of tetramethylethylenediamine, 0.003 g of sodium dodecyl sulfate, 1.2 g of foaming agent, 0.1 g of potassium carbonate, 0.17 g of aluminum sulfate, 1 g of carboxymethyl cellulose and 0.5 g of polyvinyl alcohol in 100 g of water, stir until the particles are completely dissolved, and then carry out vacuum degassing, to obtain artificial snow precursor solution;
[0052] Inject the artificial snow precursor solution into a snowflake-shaped decorative mold to fill the entire container or mold, and place a glass sheet that is subjected to surface hydrophobic treatment above the mold, irradiate under ultraviolet light with a wavelength of 365 nm for 1.0 h, and perform curing, to obtain a polyacrylamide crystalline artificial snow material.
[0053] Example 2
[0054] A method for preparing a polyacrylamide crystalline artificial snow material is as follows: dissolve 7 g of acrylamide, 18 g of N-isopropylacrylamide, 0.03g of diacetone acrylamide, 0.07 g of hydroxyethyl methacrylate, 0.2 g of ammonium persulfate, 0.02 g of tetramethylethylenediamine, 1.3 g of sodium dodecyl sulfate, 3.7 g of sodium alcohol ether sulphate, 5.2 g of sodium carbonate, 2.6 g of aluminum chloride, 0.02 g of lauric acid and 0.05 g of triethanolamine in 100g of water and stir until the particles are completely dissolved, and then carry out vacuum degassing, to obtain artificial snow precursor solution;
[0055] Inject the artificial snow precursor solution into a castle-shaped decorative mold to fill the entire container or mold, and place a glass sheet that is subjected to surface hydrophobic treatment above the mold, perform curing for 2.0 h at 70 °C, to obtain a polyacrylamide crystalline artificial snow material.
[0056] Example 3
[0057] A method for preparing a sodium alginate crystalline artificial snow material is as follows: mix 1.0 g of sodium alginate, 1.0 g of glucose, 1.5 g of fructose, 0.5 g of calcium sulfate, 0.2 g of tetrasodium pyrophosphate, 0.001 g of diatomaceous earth, 0.2 g of xanthan gum, 0.01 g of sodium dodecyl sulfate, 0.52 g of sodium carbonate carbonate, 0.005 g of aluminum chloride and 0.15 g of carboxymethyl cellulose, to obtain a mixed powder;
[0058] Dissolve the mixed powder in 15 g of water, stir until the powder is completely dissolved and carry out vacuum degassing, to obtain an artificial snow precursor solution.
[0059] Inject the artificial snow precursor solution into a refrigerator-shaped container, and place a glass sheet that is subjected to surface hydrophobic treatment above the container, conduct cross-linking reaction at room temperature for 5S minutes, to obtain a sodium alginate crystalline artificial snow material.
[0060] Example 4
[0061] A method for preparing a sodium alginate crystalline artificial snow material is as follows: mix 1.0 g of sodium alginate, 4.5 g of white soft sugar, 2.0 g of lactose,
0.02 g of calcium nitrate, 0.3 g of tetrasodium pyrophosphate, 0.5 g of tapioca starch, 0.1 g of carrageenan, 0.25 g of tea saponin, 0.01 g of potassium carbonate, 0.26 g of aluminum sulfate, and 0.002 g of lauric acid, to obtain mixed powder;
[0062] Dissolve the mixed powder in 50 g of water, stir until the powder is completely dissolved and carry out vacuum degassing, to obtain an artificial snow precursor solution;
[0063] Inject the artificial snow precursor solution into a refrigerator-shaped mold, and place a glass sheet that is subjected to surface hydrophobic treatment above the mold, conduct cross-linking reaction at room temperature for 30 minutes, to obtain a sodium alginate crystalline artificial snow material.
[0064] Example 5
[0065] A method for preparing a polyacrylamide gel-like artificial snow material is as follows: dissolve 3 g of acrylamide, 1.5 g of N-isopropylacrylamide , 0.5 g of N-tert- butylacrylamide, 0.1 g of N,N-methylenebisacrylamide, 0.2 g of potassium persulfate, 0.001 g of tetramethylethylenediamine, 8 g of sodium chloride and 22 g of calcium chloride in 100 g of water, stir until the particles are completely dissolved and carry out vacuum degassing, to obtain a gel-type ice and snow material precursor solution;
[0066] Inject the a precursor solution into a castle-shaped mold, and place a glass sheet that is subjected to surface hydrophobic treatment above the mold, perform curing for 3.0 h at 70 °C, to obtain a polyacrylamide crystalline artificial snow material.
[0067] Example 6
[0068] A method for preparing a polyacrylamide gel-like artificial snow material is as follows: dissolve 8 g of N-phenylacrylamide, 17 g of diacetone acrylamide, 0.02 g of hydroxypropyl methacrylate, 0.01 g of 2-ketoglutarate, 002 g of tetramethylethylenediamine and 0.2 g of glycerol in 100 g of water, stir until the particles are completely dissolved and carry out vacuum degassing, to obtain a gel-type ice and snow material precursor solution;
[0069] Inject the precursor solution into a glove-shaped mold, place a glass sheet that is subjected to surface hydrophobic treatment above the mold, irradiate under ultraviolet light with a wavelength of 365 nm for 0.5 h, and perform curing, to obtain a polyacrylamide crystalline artificial snow material.
[0070] Example 7
[0071] A method for preparing a sodium alginate gel-like artificial snow material is as follows: mix 1.0 g of sodium alginate, 1.6 g of white soft sugar, 0.9 g of sucrose, 0.35 g of calcium sulfate, 0.15 g of calcium chloride, 0.02 g of tetrasodium pyrophosphate, 0.2 g of corn starch and 0.2 g of xanthan gum, to obtain a mixed powder;
[0072] Dissolve 0.23 g of sodium chloride and 0.06 g of calcium chloride in 25 g of water to obtain a conditioning solution;
[0073] Dissolve the mixed powder in the conditioning solution, stir until the powder is completely dissolved and carry out vacuum degassing, to obtain an artificial snow mixture;
[0074] Inject the artificial snow mixture into a cap-shaped container, and place a glass sheet that is subjected to surface hydrophobic treatment above the container, conduct cross-linking reaction at room temperature for 5 minutes, to obtain a sodium alginate gel-like artificial snow material.
[0075] Example 8
[0076] A method for preparing a sodium alginate gel-like artificial snow material is as follows: mix 1.0 g of sodium alginate, 5.0g of glucose, 1.5 g of maltose, 0.02 g of calcium nitrate, 0.02 g of tetrasodium pyrophosphate, 0.2 g of wheat flour and 0.2 g of xanthan gum, to obtain a mixed powder;
[0077] Dissolve 0.05 g of ethylene glycol in 100 g of water to obtain a conditioning solution;
[0078] Dissolve the mixed powder in the conditioning solution, stir until the powder is completely dissolved and carry out vacuum degassing, to obtain an artificial snow mixture;
[0079] Inject the artificial snow mixture into a five-pointed star-shaped container, and place a glass sheet that is subjected to surface hydrophobic treatment above the container, conduct cross-linking reaction at room temperature for 30 minutes, to obtain a sodium alginate gel-like artificial snow material.
[0080] The foregoing description merely describes the preferred embodiments of the present disclosure. It should be noted that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the principle of the present disclosure, and these improvements and modifications shall also fall within the scope of protection of the present disclosure.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104861931A (en) | 2015-04-24 | 2015-08-26 | 北矿磁材科技股份有限公司 | Artificial snow preparation method |
| CN111154033A (en) * | 2020-01-15 | 2020-05-15 | 北京理工大学 | Gel type ice and snow material with adjustable solidification temperature and transmittance and preparation method thereof |
| CN111154137A (en) * | 2020-01-15 | 2020-05-15 | 北京理工大学 | Crystal snow material and preparation method thereof |
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- 2022-03-10 NL NL2031238A patent/NL2031238B1/en active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104861931A (en) | 2015-04-24 | 2015-08-26 | 北矿磁材科技股份有限公司 | Artificial snow preparation method |
| CN111154033A (en) * | 2020-01-15 | 2020-05-15 | 北京理工大学 | Gel type ice and snow material with adjustable solidification temperature and transmittance and preparation method thereof |
| CN111154137A (en) * | 2020-01-15 | 2020-05-15 | 北京理工大学 | Crystal snow material and preparation method thereof |
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