Transparent water-based strippable film decontamination material as well as preparation method and application thereof

Abstract

The invention provides a transparent water-based strippable film decontamination material as well as a preparation method and application thereof. According to the invention, water is taken as a solvent, waterborne polyurethane with environmental stability is taken as a film-forming matrix, 2, 2-bis (hydroxymethyl) propionic acid is taken as a hydrophilic chain extender, and a cross-linked network can be formed under the action of a cross-linking agent, so that the cross-linking degree of a polymer is improved. In the normal-temperature curing process, polymer chains can be gradually close to each other along with moisture volatilization, so that a stable cross-linked network structure is further formed, and finally the film is cured. The strippable decontamination material can be completely stripped on substrates with different surface roughness and surface energy, such as glass, stainless steel, cement and the like, and has a relatively high decontamination rate. The decontamination material is relatively high in stability and can meet the requirement of long-term storage; film forming conditions of normal-temperature curing have low requirements on curing equipment, and energy conservation and consumption reduction can be realized; and the transparent film body can also be used for temporary protection of devices and instruments. The preparation method is simple in preparation, low in cost, environment-friendly, wide in application range, excellent and stable in performance and high in application value.

Description

Technical Field

[0001] The invention relates to the technical field of functional materials, and in particular to a transparent water-based peelable film decontamination material and a preparation method and application thereof. Background Art

[0002] With the continuous development of nuclear technology and nuclear industry, nuclear energy has been widely used in many fields. However, during the operation, radioactive nuclide contamination will inevitably occur, posing a threat to the environment and the health and safety of operators. After the decommissioning of nuclear facilities or even after failures and accidents, the radioactively contaminated surfaces need to be cleaned urgently. The methods for removing radioactive contamination mainly include physical methods, such as wiping, high-pressure water washing, and planing; and chemical methods, such as electrochemical methods and solvent chemical decontamination methods. However, these decontamination methods have the disadvantages of low decontamination rate, great damage to equipment, only applicable to specific contaminated surfaces, and secondary pollution caused by a large amount of chemical waste liquid. In the face of the limitations of the above decontamination methods, a strippable membrane decontamination technology has been developed in recent years, which can utilize the mechanical action during the stripping process and the chelation of hydroxyl, amino, carboxyl and other groups in the membrane with pollutant ions to remove pollutants on the substrate surface. At the same time, the strippable membrane decontamination method has the advantages of simple operation, no secondary pollution, and convenient recovery of contaminated membranes.

[0003] At present, the strippable decontamination film generally includes two types: solvent-based and water-based strippable films. The organic solvent used in the solvent-based film will volatilize and produce volatile organic compounds (VOCs) during the curing process, which will cause environmental pollution and harm the health of the manufacturer and the user. Therefore, it is of great significance to choose a "green and healthy" environmentally friendly water-based strippable material. In the process of curing the strippable film, three approaches are usually selected: thermal curing, photocuring and room temperature curing. Thermal curing refers to the curing promoted by heating the detergent coated on the surface, while photocuring is the photocuring monomer in the detergent. Under the energy of ultraviolet rays, free radicals are induced to induce the polymerization of the unsaturated bonds of the monomers, thereby quickly curing to form a film. These two methods have high requirements for curing equipment and curing environment, which limits the application range of strippable decontamination agents. Therefore, the room temperature curing method is currently used (CN 115926515 A, CN 104327660 B, CN 116656188 A). This method not only has simple operation process, low energy consumption, and forms energy-saving and environmentally friendly green coating products, but also has important significance for protecting the environment, ecological balance and sustainable development.

[0004] In water-based strippable films, PVA is often used as a film-forming substrate because it is green and environmentally friendly and has good film-forming properties. However, the stability of PVA solutions is poor, and mold, deterioration, and stratification may occur after long-term storage (CN 111909558 B), which makes it impossible to achieve long-term storage, thereby increasing the preparation cost and storage cost of strippable decontamination materials. Thus, the present invention selects an aqueous polyurethane material with higher stability as a film-forming matrix, which can be stored for a long time. In addition, the strength of polyurethane is high, and it can be applied to a variety of substrate surfaces, and has good stripping properties on substrate surfaces with different surface energies.

[0005] The transparent water-based peelable film decontamination material prepared by the present invention can be completely peeled off on different substrates such as glass, stainless steel, cement, etc., and has a high decontamination rate. The decontamination material has strong stability and can meet the needs of long-term storage; the film-forming conditions of room temperature curing have low requirements on curing equipment, which can meet the current requirements of energy saving, consumption reduction, and green environmental protection; the transparent film body can also be used for temporary protection of devices and equipment to avoid wear, scratches and corrosion on the surface of devices and equipment. Summary of the invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects of existing strippable decontamination materials such as volatile organic compound emissions, high energy consumption, and inability to be stored for a long time, thereby providing a transparent water-based strippable film decontamination material and its preparation method and application.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] In a first aspect, the present invention provides a transparent water-based peelable film decontamination material, characterized in that, in parts by weight, its raw materials include: 500-900 parts of solvent, 100-230 parts of polyol, 60-90 parts of isophorone diisocyanate, 7-18 parts of hydrophilic chain extender, 1-5 parts of cross-linking agent, 7-18 parts of triethylamine, 500-900 parts of water, 20-50 parts of acetone, and 0.5-1 part of dibutyltin dilaurate.

[0009] Furthermore, the solvent is water.

[0010] Furthermore, the hydrophilic chain extender is 2,2-bis(hydroxymethyl)propionic acid.

[0011] Furthermore, the cross-linking agent is one or more of 1,4-butanediol, arbutin, and trimethylolpropane.

[0012] Furthermore, the polyol is one or more of polypropylene carbonate diol, polytetrahydrofuran, castor oil, and polypropylene glycol.

[0013] Furthermore, the relative molecular weight of the polypropylene carbonate diol is 2000-3000.

[0014] Furthermore, the relative molecular weight of the polytetrahydrofuran is 1000-2900.

[0015] Furthermore, the relative molecular weight of the polypropylene glycol is 1000-4000.

[0016] In a second aspect, the present invention provides a method for preparing a transparent water-based peelable film decontamination material, characterized in that it comprises the following steps:

[0017] Step 1, adding polyol, isophorone diisocyanate, and hydrophilic chain extender 2,2-bis(hydroxymethyl)propionic acid into a three-necked flask, and simultaneously dropping a catalyst dibutyltin dilaurate, placing the three-necked flask into an oil bath, and stirring the reaction at 80-100° C. for 2-3 hours to obtain a solution A;

[0018] Step 2, adding a crosslinking agent to the solution A obtained in step 1, stirring and reacting at 80-100° C. for 20-50 minutes to obtain a solution B, and after the reaction is completed, adjusting the temperature of the oil bath to 30-60° C.;

[0019] Step 3, after the temperature drops to 30-60° C., triethylamine is added to the solution B obtained in step 2 and stirred for 0.5-1 h to obtain a solution C. After the reaction is completed, the three-necked flask is taken out from the oil bath and placed on a magnetic stirrer for stirring until the solution C in the flask is cooled to room temperature;

[0020] Step 4, adding water to the solution C obtained in step 3, stirring evenly to obtain emulsion D;

[0021] Step 5, rotary evaporate the emulsion D obtained in step 4 at a temperature of 35 to 55° C. and a pressure of -0.06 to -0.09 MPa for 10 to 40 minutes to remove acetone from the emulsion D, pour in water, stir evenly to obtain the transparent aqueous peelable film decontamination material.

[0022] Furthermore, in steps 1 to 3, if the viscosity is too high to be stirred during the stirring process, acetone is added as a solvent to reduce the viscosity.

[0023] In a third aspect, the present invention provides an application of a transparent water-based peelable film decontamination material, wherein the transparent water-based peelable film decontamination material is coated on a substrate, left to stand at room temperature for 2 to 6 hours, cured to form a peelable decontamination film, and then the peelable decontamination film is peeled off.

[0024] Furthermore, the substrate is glass, metal, cement, ceramic or plastic.

[0025] The technical solution of the present invention has the following advantages:

[0026] 1. The transparent water-based peelable film decontamination material provided by the present invention uses water-based polyurethane as a film-forming matrix, and has the advantages of abundant raw material sources, high safety in use, high stability, and long-term storage. Adding a cross-linking agent during the emulsion polymerization process can link multiple molecular chains to form a cross-linked network, increase the degree of cross-linking and thus enhance the strength of the film; and by increasing the solid content, the water molecules of the peelable film decontamination material can be rapidly volatilized during the room temperature curing process, and the polymer chains gradually approach to form a stable cross-linked network structure, so that a peelable decontamination film can be formed in a relatively short time.

[0027] 2. The synthesis process of the transparent water-based peelable film decontamination material provided by the present invention uses water as a solvent instead of a volatile organic solvent, which is low-cost and environmentally friendly.

[0028] 3. The transparent water-based peelable film decontamination material provided by the present invention is cured at room temperature, does not require the use of curing equipment, is energy-saving and consumption-saving, and is green and environmentally friendly.

[0029] 4. The transparent water-based peelable film decontamination material of the present invention has good film-forming properties and can be applied to a variety of surfaces, such as glass, metal, cement, ceramic, plastic and other substrate surfaces with uneven roughness. After UV curing, it has excellent peelability and excellent decontamination ability. The decontamination rate on different surfaces exceeds 95%, which can meet the requirements of decontamination on different continuous surfaces.

[0030] 5. The transparent water-based peelable film decontamination material provided by the present invention can also be used for short-term protection of devices and equipment to protect the equipment from wear, scratches and corrosion during transportation and placement.

[0031] 6. The transparent water-based peelable film decontamination material provided by the present invention is simple to prepare, low in cost, has stable performance, is environmentally friendly, can be prepared in large quantities, has long-term stability, can be stored for a long time, and has wide application value in actual production and life. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 The transparent water-based peelable film decontamination material provided by the embodiment of the present invention is coated on the surface of glass, cement, and stainless steel, and a peelable film is formed after solidification. DETAILED DESCRIPTION

[0034] The following examples are provided for a better understanding of the present invention, but are not intended to limit the best mode of implementation, nor to limit the content and protection scope of the present invention. Any product identical or similar to the present invention obtained by anyone under the inspiration of the present invention or by combining the features of the present invention with other prior arts shall fall within the protection scope of the present invention.

[0035] If no specific experimental steps or conditions are specified in the examples, the conventional experimental steps or conditions described in the literature in the art can be used. The raw materials or instruments used are all conventional products that can be obtained commercially, including but not limited to the raw materials or instruments used in the examples of this application.

[0036] A transparent water-based peelable film decontamination material, a preparation method and an application thereof provided by an embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] Example 1

[0038] The present embodiment provides a transparent water-based peelable film decontamination material, whose raw materials include, by weight: 150 parts of polyol (polypropylene carbonate diol and polytetramethylene glycol), 78 parts of isophorone diisocyanate, 12 parts of 2,2-bis(hydroxymethyl)propionic acid, 3 parts of arbutin, 8 parts of triethylamine, 600 parts of water, 20 parts of acetone, and 0.5 parts of dibutyltin dilaurate.

[0039] In this embodiment, the method for preparing the transparent water-based peelable film decontamination material comprises the following steps:

[0040] Step (1), adding polyol (polypropylene carbonate and polytetrahydrofuran), isophorone diisocyanate, and 2,2-bis(hydroxymethyl)propionic acid into a three-necked flask, and simultaneously dropping a catalyst dibutyltin dilaurate into the three-necked flask, placing the three-necked flask into an oil bath, and stirring the reaction at 90° C. for 2.5 h to obtain a solution A;

[0041] Step (2), adding arbutin to the solution A obtained in step 1, stirring and reacting at 90° C. for 30 min to obtain a solution B. After the reaction is completed, adjusting the temperature of the oil bath to 50° C.;

[0042] Step (3), after the temperature drops to 50° C., triethylamine is added to the solution B obtained in step 2 and stirred for 0.5 h to obtain a solution C. After the reaction is completed, the three-necked flask is taken out from the oil bath and placed on a magnetic stirrer for stirring until the solution C in the flask is cooled to room temperature;

[0043] Step (4), adding water to the solution C obtained in step 3, stirring evenly, to obtain emulsion D;

[0044] Step (5), rotary evaporating the emulsion D at a temperature of 50° C. and a pressure of −0.08 MPa for 30 min to remove the acetone in the emulsion D, pouring water into the emulsion and stirring evenly to obtain the transparent water-based peelable film decontamination material.

[0045] In this embodiment, the transparent water-based peelable film decontamination material is coated on the surface of glass, stainless steel, and cement substrates, and left to stand at room temperature for 4 hours, and the peelable film is peeled off after solidification.

[0046] Example 2

[0047] The present embodiment provides a transparent water-based peelable film decontamination material, whose raw materials include, by weight: 150 parts of castor oil, 78 parts of isophorone diisocyanate, 12 parts of 2,2-bis(hydroxymethyl)propionic acid, 3 parts of 1,4-butanediol, 8 parts of triethylamine, 600 parts of water, 20 parts of acetone, and 0.5 parts of dibutyltin dilaurate.

[0048] In this embodiment, the preparation method and application of the transparent water-based peelable film decontamination material can refer to Example 1.

[0049] Example 3

[0050] The present embodiment provides a transparent water-based peelable film decontamination material, whose raw materials include, by weight: 150 parts of polypropylene glycol, 78 parts of isophorone diisocyanate, 12 parts of 2,2-bis(hydroxymethyl)propionic acid, 3 parts of trimethylolpropane, 8 parts of triethylamine, 600 parts of water, 20 parts of acetone, and 0.5 parts of dibutyltin dilaurate.

[0051] In this embodiment, the preparation method and application of the transparent water-based peelable film decontamination material can refer to Example 1.

[0052] Example 4

[0053] The present embodiment provides a transparent water-based peelable film decontamination material, whose raw materials include, by weight: 150 parts of polyol (polypropylene carbonate diol and polytetramethylene glycol), 78 parts of isophorone diisocyanate, 12 parts of 2,2-bis(hydroxymethyl)propionic acid, 3 parts of arbutin, 8 parts of triethylamine, 600 parts of water, 20 parts of acetone, and 0.5 parts of dibutyltin dilaurate.

[0054] In this embodiment, the preparation method and application of the transparent water-based peelable film decontamination material can refer to Example 1, the difference being that the transparent water-based peelable film decontamination material is coated on the surface of glass, stainless steel, and cement substrates, respectively, and left to stand at room temperature for 2 hours, and the peelable film is peeled off after curing.

[0055] Example 5

[0056] The present embodiment provides a transparent water-based peelable film decontamination material, whose raw materials include, by weight: 150 parts of polyol (polypropylene carbonate diol and polytetramethylene glycol), 78 parts of isophorone diisocyanate, 12 parts of 2,2-bis(hydroxymethyl)propionic acid, 3 parts of arbutin, 8 parts of triethylamine, 600 parts of water, 20 parts of acetone, and 0.5 parts of dibutyltin dilaurate.

[0057] In this embodiment, the preparation method and application of the transparent water-based peelable film decontamination material can refer to Example 1, the difference being that the transparent water-based peelable film decontamination material is coated on the surface of glass, stainless steel, and cement substrates, respectively, and left to stand at room temperature for 6 hours, and the peelable film is peeled off after curing.

[0058] Experimental Example 1

[0059] The transparent water-based peelable film decontamination material prepared in Example 1 of the present invention was tested for its peelability and film-forming properties.

[0060] Preparation before the test:

[0061] (1) Using a glass sheet, a 304 stainless steel sheet, and a cement sheet with a size of 5 cm × 25 cm as a substrate, the transparent water-based peelable film decontamination material prepared in Example 1 was applied to the surface of the glass sheet, the 304 stainless steel sheet, and the cement sheet by manual brushing, and the coating thickness was 1.0 mm;

[0062] (2) The three substrates were allowed to stand at room temperature for 4 hours to obtain three water-based peelable film samples for later use.

[0063] Peelability test:

[0064] Take three samples, peel off the peelable film from the substrate, and observe the peeling effect of the film on different substrate surfaces. The peeling rate is calculated as follows:

[0065] Peeling rate = one-time peeling area / coating area.

[0066] Film forming rate experiment:

[0067] Take three samples to observe the curing film-forming effect of the transparent water-based peelable film decontamination material at room temperature. The film-forming rate is calculated as follows:

[0068] Film formation rate = film formation area / coating area.

[0069] The test results are shown in Table 1.

[0070] Table 1 Test results of film formation rate and strippability of the transparent water-based strippable film decontamination material prepared in Example 1 coated on different substrate surfaces

[0071] Base Film forming rate (%) Peelability (%) Glass 100 100 304 Stainless Steel 100 100 Cement sheet 100 100

[0072] As can be seen from Table 1, the transparent water-based peelable film decontamination material prepared in Example 1 is coated on the surfaces of three different substrates, namely glass, 304 stainless steel and cement, and is cured at room temperature for 4 hours to form a peelable film. The film-forming property is 100%, and the peelability of the peelable film is 100%, showing good film-forming property and peelability.

[0073] See also Figure 1 As shown in the figure, the transparent water-based peelable film decontamination material prepared in Example 1 was coated on the surfaces of three different substrates: glass, 304 stainless steel and cement. After being cured at room temperature for 4 hours, a peelable film was formed. The obtained peelable films could be completely peeled off from the substrate.

[0074] Experimental Example 2

[0075] The cleansing performance of the transparent water-based peelable film cleansing material prepared in Example 1 of the present invention was tested.

[0076] Preparation before the test:

[0077] (1) A glass sheet, a 3 cm × 3 cm stainless steel sheet, or a cement sheet was used as the substrate;

[0078] (2) dissolving cesium chloride in water to obtain a cesium chloride solution, applying the solution to the surface of a glass sheet, a 304 stainless steel sheet, or a cement sheet substrate, and after the solution is dried, obtaining a contaminated substrate;

[0079] (3) The transparent water-based peelable film decontamination material prepared in Example 1 is brushed onto the surface of the contaminated substrate and cured at room temperature to obtain a transparent water-based peelable film.

[0080] Decontamination rate:

[0081] After the peelable film is peeled off, the surface contamination level of the substrate after decontamination is measured, and the decontamination rate is calculated according to the decontamination formula.

[0082]

[0083] Where DE is the decontamination rate, n1 is the amount of cesium chloride in the solution obtained after decontamination, and n0 is the amount of cesium chloride in the solution prepared before contamination.

[0084] The test results are shown in Table 2.

[0085] Table 2 Decontamination rate test results of the transparent water-based peelable film decontamination material prepared in Example 1

[0086]

[0087]

[0088] As shown in Table 2, the transparent water-based peelable film decontamination material prepared in Example 1 was coated on three different substrate surfaces, namely glass, 304 stainless steel and cement, and formed a peelable film after curing at room temperature. The decontamination rates of the peelable film on the cement surface, 304 stainless steel surface and glass surface were 99.61%, 98.57% and 98.43%, respectively, all showing relatively high decontamination rates.

[0089] Experimental Example 3

[0090] The transparent water-based peelable film decontamination materials prepared in Examples 1 to 5 of the present invention were tested for mechanical properties.

[0091] Preparation before the test:

[0092] The transparent water-based peelable film decontamination materials prepared in Examples 1 to 5 were coated on a standard sample mold and cured at room temperature to obtain a peelable film.

[0093] Mechanical properties test:

[0094] The tensile strength and elongation at break of the peelable film were tested using an Instron 68TM-50,000-watt mechanical testing machine. The test results are shown in Table 3.

[0095] Table 3 Performance test results of the peelable film formed by the transparent aqueous peelable film decontamination material prepared in Examples 1 to 5

[0096]

[0097]

[0098] As shown in Table 3, the transparent water-based peelable film decontamination materials prepared in Examples 1 to 5 are cured at room temperature to form peelable films, and the peelable films formed have a tensile strength of up to 14.93 MPa and a breaking elongation of up to 437.59. It can be seen that the transparent water-based peelable film provided by the present invention has good mechanical properties and meets the requirements of mechanical properties for peelable film peeling.

[0099] Experimental Example 4

[0100] The transparent water-based peelable film decontamination materials prepared in Examples 1 to 3 of the present invention were tested for stability.

[0101] Stability test:

[0102] Three samples of the transparent water-based peelable film decontamination materials prepared in Examples 1 to 3 were taken respectively and dropped into centrifuge tubes. The centrifuge tubes were placed in a centrifuge, and the centrifugal speed was set to 3000 rpm and the centrifugal time was 15 minutes. After the centrifugation, the emulsion was observed to see whether there was obvious stratification, precipitation, and flocculation. The test results are shown in Table 4.

[0103] Table 4 Stability test of transparent aqueous peelable film decontamination materials prepared in Examples 1 to 3.

[0104] Whether to layer Whether it is subsided Whether flocculation Example 1 no no no Example 2 no no no Example 3 no no no

[0105] As shown in Table 4, the transparent water-based peelable film decontamination materials prepared in Examples 1 to 3 showed no stratification, precipitation or flocculation after centrifugation, indicating that the prepared transparent water-based peelable film decontamination materials had good stability.

[0106] In summary, the transparent water-based peelable film decontamination material provided by the present invention uses water-based polyurethane as a film-forming matrix, and has the characteristics of abundant raw material sources, high safety in use, high stability and long-term storage. Adding a cross-linking agent during the emulsion polymerization process can link multiple molecular chains to form a cross-linked network, increase the degree of cross-linking and thus enhance the strength of the film; and by increasing the solid content, the water molecules of the peelable film decontamination material can be rapidly volatilized during the room temperature curing process, and the polymer chains gradually approach to form a stable cross-linked network structure, so that a peelable decontamination film can be formed in a relatively short time.

[0107] The present invention has carried out the strippability and film-forming property test of the transparent water-based strippable film decontamination material, as shown in Table 1, Figure 1 As shown, the film-forming rate on the glass, 304 stainless steel, and rough cement substrate surfaces all reached 100%, and the strippability rate all reached 100%, showing good film-forming and strippability. The decontamination performance test of the transparent water-based strippable film decontamination material of the present invention, as shown in Table 2, shows that the decontamination rate on the rough cement surface reaches 99.61%, and the decontamination rate on the contaminated surfaces of glass and 304 stainless steel is greater than 98%, showing a relatively high decontamination performance. In addition, for the transparent water-based strippable film decontamination material of the present invention with different component ratios, the mechanical properties of the strippable film formed therefrom are tested. As shown in Table 3, the tensile strength can reach up to 14.93MPa and the elongation at break can reach up to 437.59, which meet the mechanical property requirements of the strippable film.

[0108] The transparent water-based peelable film decontamination material of the present invention has good film-forming property and can be applied to various surfaces, such as metal, glass, ceramic, plastic and cement surface with uneven roughness. After being cured at room temperature, it has good peelability and excellent decontamination ability, and can meet the requirements of decontamination operation on different continuous surfaces.

[0109] The preparation process of the aqueous peelable film decontamination material provided by the present invention uses water as a solvent instead of a volatile organic solvent, is low-cost, green and environmentally friendly, and is simple to prepare, has stable performance, and can be stored for a long time, and has wide application value in actual production and life.

[0110] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A transparent water-based peelable film decontamination material, characterized in that: The raw materials include, by weight: 500-900 parts of solvent, 100-230 parts of polyol, 60-90 parts of isophorone diisocyanate, 7-18 parts of hydrophilic chain extender, 1-5 parts of cross-linking agent, 7-18 parts of triethylamine, 20-50 parts of acetone, and 0.5-1 part of dibutyltin dilaurate.

2. The transparent water-based peelable film decontamination material according to claim 1, characterized in that: The solvent is water, and the hydrophilic chain extender is 2,2-bis(hydroxymethyl)propionic acid.

3. The transparent water-based peelable film decontamination material according to claim 1, characterized in that: The cross-linking agent is one or more of 1,4-butanediol, arbutin and trimethylolpropane.

4. The transparent water-based peelable film decontamination material according to claim 1, characterized in that: The polyol is one or more of polypropylene carbonate diol, polytetrahydrofuran, castor oil and polypropylene glycol.

5. The transparent aqueous peelable film decontamination material according to claim 1 or 4, characterized in that: The relative molecular weight of the polypropylene carbonate diol is 2000-3000; the relative molecular weight of the polytetrahydrofuran is 1000-2900; and the relative molecular weight of the polypropylene glycol is 1000-4000.

6. The method for preparing a transparent water-based peelable film decontamination material according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1, adding polyol, isophorone diisocyanate, and hydrophilic chain extender 2,2-bis(hydroxymethyl)propionic acid into a three-necked flask, and simultaneously dropping a catalyst dibutyltin dilaurate, placing the three-necked flask into an oil bath, and stirring the reaction at 80-100° C. for 2-3 hours to obtain a solution A; Step 2, adding a crosslinking agent to the solution A obtained in step 1, stirring and reacting at 80-100° C. for 20-50 minutes to obtain a solution B, and after the reaction is completed, adjusting the temperature of the oil bath to 30-60° C.; Step 3, after the temperature drops to 30-60° C., add triethylamine to the solution B obtained in step 2, and stir the reaction for 0.5-1 h to obtain a solution C. After the reaction is completed, take the three-necked flask out of the oil bath, and place the three-necked flask on a magnetic stirrer for stirring until the solution in the flask cools to room temperature; Step 4, adding water to the solution C obtained in step 3, stirring evenly to obtain emulsion D; Step 5, rotary evaporate the emulsion D obtained in step 4 at a temperature of 35 to 55° C. and a pressure of -0.06 to -0.09 MPa for 10 to 40 minutes to remove acetone from the emulsion D, pour in water, stir evenly to obtain the transparent aqueous peelable film decontamination material.

7. The method for preparing a transparent water-based peelable film decontamination material according to claim 8, characterized in that: In steps 1 to 3, if the viscosity is too high to be stirred during the stirring process, acetone is added as a solvent to reduce the viscosity.

8. Use of the transparent water-based peelable film decontamination material according to any one of claims 1 to 7, characterized in that: The transparent water-based peelable film decontamination material is coated on a substrate, left to stand at room temperature for 2 to 6 hours to solidify to form a peelable decontamination film, and then the peelable decontamination film is peeled off.

9. The use of the transparent water-based peelable film decontamination material according to claim 9, characterized in that: The substrate is glass, metal, cement, ceramic or plastic.

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