Preparation method of thermal-insulation ionic adhesive film and safety glass prepared from thermal-insulation ionic adhesive film

Abstract

The invention discloses a preparation method of a heat-insulating ionic adhesive film and safety glass thereof, and belongs to the technical field of glass preparation. The preparation method comprises the following steps: S1, stirring and mixing Cu (NO3) 2.3 H2O and ionic liquid to obtain a blue colloidal solution; s2, reacting the blue colloidal solution in a reaction kettle, collecting a nano CuS product, and dispersing the nano CuS product in deionized water to obtain flaky nano CuS; s3, a silane coupling agent is dissolved in absolute ethyl alcohol and stirred, a mixed solution is obtained, nano CuS is added into the mixed solution, magnetic stirring is conducted, and then ultrasonic treatment is conducted; s4, blending the solution subjected to ultrasonic treatment with SGP resin, and then taking out and drying to obtain a blend; and S5, extruding the blend into a sheet by using a parallel twin-screw extruder, and pressing and shaping the extruded sheet by using a conveyor belt tractor to obtain the adhesive film. The oxygen vacancy modified CuS improves the photocatalysis, antibacterial or ultraviolet shielding performance and is suitable for building or automobile glass, and the SGP resin matrix has high transparency, weather resistance and flexibility and is suitable for laminated safety glass.

Description

Technical Field

[0001] The present invention belongs to the technical field of glass preparation, and particularly relates to a preparation method of a heat-insulating ionic film and a safety glass thereof. Background Art

[0002] The development and application of science and technology bring convenience and speed to people, but also give rise to new problems. In the era of environmental pollution and excessive energy consumption, it is particularly important to develop new energy and save energy consumption to achieve sustainable development. For modern people, means of transportation such as cars and high-speed rails have become an indispensable part of daily life. However, while these means of transportation bring convenience, they also bring huge energy consumption to us.

[0003] Approximately one-third of the surface area of a car is made of glass. The production of glass requires high-temperature heating in a tank furnace or crucible to form it. According to incomplete statistics, about 46.5 million tons of flat glass were produced in China in 2020. Calculated according to the production energy consumption of flat glass, it requires about 12 million tons or more of standard coal. Calculated according to the carbon emission of standard coal, about 2.57 tons of carbon dioxide can be produced by burning one ton of standard coal. The flat glass produced in China every year will produce 31 million tons of carbon dioxide. If a transparent polymer film is added between double-layer glass, a laminated safety glass will be formed, which can not only reduce the usage amount of glass and increase the mechanical properties of the glass, but also reduce the overall mass of the car, thereby reducing the fuel consumption of the car and achieving the effect of saving energy, and has a certain positive effect on environmental protection.

[0004] At present, the main interlayer films on the market include ethylene-methacrylate ionomer film (SGP), polyvinyl butyral film (PVB), polyurethane film (PU), etc. The interlayer film is bonded to the glass through processes such as hot pressing to form a safety glass, reducing the weight of the glass when used as a structural material. However, these films do not have good heat-insulating effects, so these materials need to be modified for heat insulation without affecting their own properties. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a preparation method of a heat-insulating ionic film and a safety glass thereof to solve the above problems.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] The present invention provides a preparation method of a heat-insulating ionic film, and the method includes the following steps,

[0008] S1. Dissolve Cu(NO3)2·3H2O in an imidazole-based ionic liquid and stir magnetically until completely dissolved; after adding sericin, stir under water bath conditions to form a blue colloidal solution;

[0009] S2. Transfer the blue colloidal solution to a microwave reactor for reaction to obtain nano-CuS; after the reaction is completed, centrifuge to collect nano-CuS, wash it with absolute ethanol, and then disperse the product in deionized water, add 1 mL of H2O2 (30%) and stir at room temperature; then centrifuge and dry to obtain flaky nano-CuS modified with oxygen vacancies;

[0010] S3. Dissolve the silane coupling agent in absolute ethanol and stir magnetically to obtain a colorless and transparent mixed solution, then add the flaky nano-CuS to the mixed solution and stir magnetically until it becomes a paste-like solution; after the stirring is completed, transfer it to an ultrasonic cleaner for ultrasonic dispersion;

[0011] S4. High-mix the ultrasonically treated paste-like solution and SGP resin in a high-speed mixer for 5 min, then take it out and dry it in a forced-air drying oven to obtain a blend;

[0012] S5. Extrude the blend into a sheet using a parallel twin-screw extruder, with the die thickness set to 2 mm, and the processing temperature set from the first section to the die head as follows: 165 °C, 165 °C, 170 °C, 170 °C, and the screw speed set to: 50 rpm / min; the extruded sheet is pressed and shaped by a conveyor belt traction machine, and the sheet is wound up after cooling to obtain a glue film.

[0013] Further, in the step S1, the imidazole-based ionic liquid is [EMIM][SCN] ionic liquid; the stirring duration of Cu(NO3)2·3H2O and the imidazole-based ionic liquid is 25 - 35 min; the water bath temperature after adding sericin is 55 - 65 °C, and the stirring duration is 50 - 70 min.

[0014] Further, in the step S2, the set power in the microwave reactor is 300 W, the temperature is 100 °C, and the reaction time is 15 min.

[0015] Further, the magnetic stirring duration is 30 min and the temperature is 60 °C; the ultrasonic duration is 30 min and the temperature is 50 °C.

[0016] Further, the mass ratio of the paste-like solution to SGP resin is 1 - 10:100; the drying temperature in the forced-air drying oven is 75 - 85 °C, and the time is 3.5 - 4.5 h.

[0017] Further, a method for preparing safety glass with a heat-insulating ionic film includes the following steps:

[0018] P1. Sandwich the adhesive film in a square mold with a thickness of 1 mm and a length and width of 22 cm, place it in a flat vulcanizing machine for molding, cool the template after molding, and open the mold to take out the sample after cooling is completed;

[0019] P2. Wash the glass with distilled water and absolute ethanol, dry it in an oven, then cut the molded sheet into the same size as the glass and sandwich it between the dried glass, place it in a vacuum oven for high-temperature and high-pressure treatment at 100 °C for 1 h, and finally cool it quickly to obtain SGP laminated safety glass.

[0020] Furthermore, in the step P1, the temperatures of the upper and lower templates of the flat vulcanizing machine are both 175 °C, pre-press for 5 min, with a pressure of 1 MPa; keep the pressure for 10 min, with a pressure of 5 MPa; the vacuum pressure is set to -0.09 MPa, and the vacuum is pumped 3 times per minute.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. In the present invention, through the ionic liquid and microwave-assisted synthesis method, the prepared nano-CuS has a uniform flaky structure, and the H2O2 treatment introduces oxygen vacancies, enhancing the material activity. The modification with silane coupling agent improves the interfacial compatibility between CuS and SGP resin, avoids nanoparticle aggregation, and ensures uniform dispersion in the matrix. The CuS modified by oxygen vacancies improves the photocatalytic, antibacterial or ultraviolet shielding performance and is suitable for building or automotive glass, while the SGP resin matrix has high transparency, weather resistance and flexibility, suitable for laminated safety glass applications.

[0023] 2. In the present invention, the introduction of nano-CuS can improve the strength and toughness of the SGP adhesive film, making the laminated glass not easily broken when impacted; CuS can also absorb ultraviolet rays to protect indoor items from aging; the CuS modified by oxygen vacancies may generate reactive oxygen species (ROS) under light, having the potential for antibacterial or decomposing organic pollutants; the SGP resin itself has a high light transmittance, and the uniform dispersion of nano-CuS avoids optical scattering and maintains the transparency of the glass. The high-temperature and high-pressure treatment can ensure the tight adhesion between the adhesive film and the glass, preventing delamination or bubble generation.

[0024] 3. The ionic liquid adopted in the present invention can provide a stable dissolution environment, promote the uniform release of Cu 2+ to avoid nanoparticle aggregation in traditional aqueous phase synthesis; through microwave reaction, it can quickly and uniformly heat to induce the reaction of Cu 2+ with thiocyanate (SCN-) to generate CuS. The local hot spot effect of microwave promotes the formation of flaky structure; the H2O2 treatment can oxidize part of S 2- to sulfur vacancies or oxygen doping (forming CuS 1-x O x) The oxygen vacancies can regulate the electronic structure and enhance the photo / electrochemical activity. The silanol groups (—Si—OH) after the hydrolysis of the silane coupling agent bond with the hydroxyl groups on the surface of CuS, and the organic groups at the other end are compatible with the SGP resin, achieving strong interfacial bonding.

[0025] 4. The present invention provides high shear force through parallel twin-screw extrusion to uniformly plasticize the CuS / SGP blend. In the molding stage, the resin can flow to fill the glass gaps, and the vacuum removes the bubbles.

[0026] 5. The microwave synthesis and low-temperature solution treatment adopted in the present invention reduce energy consumption. The parallel twin-screw extrusion and molding processes can achieve large-scale production. Through the collaborative optimization of nanomaterial design - interface engineering - precision machining, the prepared adhesive film has both functional and mechanical properties, while the laminated safety glass is outstanding in transparency, safety, and durability, meeting the high-end market demands.

[0027] Other advantages, objectives, and features of the present invention will be described in the subsequent specification, and to some extent, they are obvious to those skilled in the art, or those skilled in the art can obtain teachings from the practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To make the objectives, technical solutions, and beneficial effects of the invention clearer, the present invention provides the following drawings for description:

[0029] Figure 1 It is the XRD pattern of flaky nano-CuS in the present invention;

[0030] Figure 2 It is the field emission EDS energy spectrum diagram of flaky nano-CuS in the present invention;

[0031] Figure 3 It is the field emission transmission electron microscope image of flaky nano-CuS in the present invention;

[0032] Figure 4 (a - b) are the mechanical property diagrams of pure SGP and the flaky nano-CuS / SGP blend intermediate film respectively;

[0033] Figure 5 It is the light transmittance display diagram of the safety glass prepared from pure SGP and the flaky nano-CuS / SGP blend intermediate film;

[0034] Figure 6 It is the transmittance display diagram of the flaky nano-CuS / SGP blend intermediate film safety glass at different wavelength bands;

[0035] Figure 7It is the ultraviolet-visible-near-infrared light spectrum display diagram of the sheet-like nano CuS / SGP blended intermediate film safety glass. Specific embodiments

[0036] As Figures 1 - 7 shown, the present invention provides a preparation method of a heat-insulating ionic film and safety glass.

[0037] Example 1

[0038] S1. Dissolve 0.5 g of Cu(NO3)2·3H2O in 20 mL of [EMIM][SCN] ionic liquid and stir magnetically for 30 min to completely dissolve it; then add 0.1 g of sericin and stir in a water bath at 60 °C for 60 min to form a blue colloidal solution.

[0039] S2. Transfer the blue colloidal solution to a microwave reactor, react at 300 W and 100 °C for 15 min to obtain nano CuS; after the reaction, centrifuge to collect nano CuS, wash it 3 times with absolute ethanol, and then disperse the product in 10 mL of deionized water, add 1 mL of H2O2 (30%) and stir at room temperature for 2 h, and then centrifuge and dry to obtain oxygen vacancy-modified sheet-like nano CuS.

[0040] S3. Dissolve the silane coupling agent in absolute ethanol (mass concentration of 5%) and stir magnetically. When the mixed solution becomes colorless and transparent, add the sheet-like nano CuS to a beaker and stir magnetically at 60 °C for 30 min to prepare a paste solution with a mass concentration of 10%; after stirring, transfer it to an ultrasonic cleaner and ultrasonically disperse it at 50 °C for 30 min.

[0041] S4. Mix the ultrasonically prepared paste solution and SGP resin in a high-speed mixer at a mass ratio of 2:100 for 5 min, then take it out and place it in a blast drying oven to dry at 80 °C for 4 h, and the nano CuS is coated on the surface of the SGP particles to obtain a blend.

[0042] S5. Extrude the blend into a sheet using a parallel twin-screw extruder, with the die thickness of 2 mm. The processing temperature is set from the first section to the head as follows: 165 °C, 165 °C, 170 °C, 170 °C, and the screw speed is set to: 50 rpm / min; the extruded sheet is pressed and shaped by a conveyor belt traction machine, and after the sheet cools, it is wound up to obtain a film.

[0043] S6. Clamp the film in a square mold with a thickness of 1 mm and a length and width of 22 cm, place it in a flat vulcanizer for molding, set the upper and lower template temperatures of the flat vulcanizer to 175 °C, pre-press for 5 min, pressure 1 MPa; keep the pressure for 10 min, pressure 5 MPa; the vacuum pressure is set to -0.09 MPa, and evacuate 3 times per minute. After molding, cool the template, and after cooling, open the mold to take out the sample.

[0044] S7. Wash the glass with distilled water and absolute ethanol, dry it in an oven, then cut the molded sheet into the same size as the glass and sandwich it between the dried glasses, place it in a vacuum oven and treat it at 100 °C under high temperature and pressure for 1 h, and finally quickly cool it to obtain SGP laminated safety glass.

[0045] Example 2

[0046] The difference between Example 2 and Example 1 is that in step S4, the mass ratio of the paste solution to the SGP resin is 4:100.

[0047] Example 3

[0048] The difference between Example 3 and Example 1 is that in step S4, the mass ratio of the paste solution to the SGP resin is 6:100.

[0049] Example 4

[0050] The difference between Example 4 and Example 1 is that in step S4, the mass ratio of the paste solution to the SGP resin is 8:100.

[0051] To prove the superiority of the ratio of the paste solution to the SGP resin in the present invention, Comparative Examples 1-3 are set here.

[0052] Comparative Example 1

[0053] The difference between Comparative Example 1 and Example 1 is that in step S4, the mass ratio of the paste solution to the SGP resin is 12:100.

[0054] Comparative Example 2

[0055] The difference between Comparative Example 2 and Example 1 is that in step S4, the mass ratio of the paste solution to the SGP resin is 14:100.

[0056] Comparative Example 3

[0057] The difference between Example 3 and Example 1 is that in step S4, the mass ratio of the paste solution to the SGP resin is 16:100.

[0058] Comparative Example 4

[0059] The difference between Example 4 and Example 1 is that in step S4, the mass ratio of the paste solution to the SGP resin is 18:100.

[0060] ① XRD phase analysis

[0061] As Figure 1As shown in the figure, the main diffraction peaks of the flaky nano-CuS particles in the spectrum are at 2θ of 27.717° (111), 32.113° (200), 46.053° (220), etc., which are consistent with the standard card PDF: 00-024-0061 of cubic phase CuS, indicating that the sample is composed of cubic phase CuS crystals, with a space group of Fm-3m and lattice parameters of: a = b = c = 5.57 Å.

[0062] ② TEM and EDS analysis

[0063] To further study the morphology and structure of flaky nano-CuS, scanning electron microscopy and transmission electron microscopy were performed on it.

[0064] Figure 2 Figure 10 is the field emission EDS spectrum of flaky nano-CuS, showing that the sample is mainly composed of two elements, Cu and S, and the atomic ratio of Cu to S is 63.73:36.27, indicating that the sample contains a certain amount of Cu2-xS.

[0065] Figure 3 Figure 14 is the field emission transmission electron microscopy image of flaky nano-CuS, indicating that the prepared flaky nano-CuS is composed of irregular quadrilateral flakes stacked together, with a size of about 100 nm.

[0066] ③ Mechanical property analysis

[0067] Figure 4 (a), Figure 4 (b) are the tensile strength, elastic modulus, and elongation at break of pure SGP and SGP / flaky nano-CuS blends, respectively. Table 2 shows the corresponding data.

[0068] As Figure 4 (a) and Table 1 show that the tensile strength of the blend decreases overall after adding flaky nano-CuS in the comparative example compared with the pure SGP sample; when the mass fraction of flaky nano-CuS is 0.2%, the tensile strength of the blend is 36.2 MPa, which is 3.7 MPa lower than the tensile strength of the pure SGP sample of 39.9 MPa. The analysis may be that the amount of flaky nano-CuS is too small. Although it is modified by KH570 silane coupling agent, the compatibility with the SGP blend is increased, but the density of flaky nano-CuS in a certain area is too low and the interaction force with the macromolecular chains inside the blend is too small. When subjected to continuous external tensile force, the flaky nano-CuS falls off. At this time, the flaky nano-CuS is equivalent to an impurity and forms voids inside the matrix, resulting in a decrease in the tensile strength of the SGP / flaky nano-CuS blend.

[0069] With the increase in the dosage of flaky nano-CuS, the tensile strength of the SGP / flaky nano-CuS blend gradually increases; when the dosage of flaky nano-CuS is 1.8%, the tensile strength of the SGP / flaky nano-CuS blend is 40.1 MPa, which is 3.9 MPa higher than the tensile strength of the sample in Example 1 and 0.2 MPa higher than that of the pure SGP sample. This is because with the increase in the dosage of flaky nano-CuS, the density of its distribution in the SGP blend matrix also increases, resulting in an increase in the interaction force between the modified flaky nano-CuS and the macromolecular chains in the blend. When the external tensile force acts continuously, the flaky nano-CuS is not easily detached from the matrix to form defects, so the tensile strength of the blend increases with the increase in the dosage of flaky nano-CuS.

[0070] From Figure 4 (b) and Table 2, it can be seen that after the addition of flaky nano-CuS, the elongation at break of the polymer increases from the original 355% to 738%, 630%, 664%, 617%, and 654% respectively. When the content of flaky nano-CuS is 0.2%, the polymer has the highest elongation at break, which is about 107.8% higher than that of the pure SGP sample; then, with the increase in the dosage of flaky nano-CuS, the elongation at break of the polymer fluctuates around 600%. The elastic modulus of the SGP blend gradually decreases with the addition of flaky nano-CuS.

[0071] Based on the above conclusions, it can be speculated that flaky nano-CuS can reduce the interaction force between the SGP macromolecular chains, increase the mobility and flexibility of the macromolecular chains, thereby increasing the elongation at break and reducing the elastic modulus of the SGP / flaky nano-CuS blend.

[0072] Table 1

[0073] Number Tensile Strength (MPa) Elastic Modulus (MPa) Elongation at Break (%) Pure SGP 39.9 75.33 355 Example 1 36.2 31.8 738 Comparative Example 1 36.6 43.29 630 Comparative Example 2 37.6 37.40 664 Comparative Example 3 39.1 46.68 617 Comparative Example 4 40.1 42.3 654

[0074] ④ Transmittance analysis

[0075] The visible light transmittance of the interlayer film of safety glass is particularly important.

[0076] As Figure 5 shown, Figure 5 are the transmittances of the blank glass and the safety glasses prepared with the flaky nano-CuS / SGP blend interlayer films prepared from pure SGP, Example 1, and Comparative Examples 1-4 respectively; Table 2 is the transmittance of the blank glass and the safety glasses prepared with the flaky nano-CuS / SGP blend interlayer films prepared from pure SGP, Example 1, and Comparative Examples 1-4 at a wavelength of 560 nm.

[0077] From Figure 5As can be seen from Table 2, the light transmittance of the blank glass and the sample pure SGP is similar in the wavelength range of 300 - 600 nm. This is because the light transmittance of safety glass mainly depends on the light transmittance of the interlayer film. The light transmittance of the interlayer film prepared in Example 1 is affected by the crystallinity of the blend, the grain size, and the filler. When the crystallinity is relatively low or the crystal size is small, light can directly pass through the amorphous region and the fine grains. Since SGP itself has a very low crystallinity, the light transmittance of the sample pure SGP is similar to that of the blank glass.

[0078] The blank glass and the sample pure SGP have a high transmittance to ultraviolet light and do not have the ability to block it. After adding copper sulfide nanoparticles, the laminated glass has the ability to block ultraviolet light, and the blocking ability gradually increases with the increase of the dosage. In daily life, the visible light transmittance at 560 nm is usually used to judge the transparency of an object. As can be seen from Table 3, the light transmittance of the interlayer film with added copper sulfide nanoparticles at 560 nm decreases with the increase of the dosage of copper sulfide nanoparticles, and the blocking property of the safety glass to visible light gradually increases.

[0079] Table 2

[0080] Number Transmittance (560nm) (%) Pure Glass 88.1 Pure SGP 86.3 Example 1 81.5 Comparative Example 1 72.6 Comparative Example 2 62.4 Comparative Example 3 55 Comparative Example 4 47.9

[0081] ⑤ Thermal insulation performance analysis

[0082] Figure 6 The transmittance of the sheet-like nano-CuS / SGP blend interlayer film safety glass prepared in Example 1 at different wavelengths, namely ultraviolet UV (365 nm), infrared IR (940 nm), and visible light VL (680 - 760 nm).

[0083] Figure 7 The ultraviolet-visible-near-infrared light spectrum of the sheet-like nano-CuS / SGP blend interlayer film safety glass prepared in Example 1.

[0084] Table 3 shows the thermal conductivity data of the interlayer film of SGP blended with different mass fractions of sheet-like nano-CuS.

[0085] From Figure 6 As can be seen, with the increase of the content of sheet-like nano-CuS, the ultraviolet light transmittance gradually decreases. When the content of the sheet-like nano-CuS blend is 1.8%, the transmittance is the lowest at 60%. This indicates that the sheet-like nano-CuS of the present invention has a good blocking effect on ultraviolet light.

[0086] With the increase of the dosage of sheet-like nano-CuS, the blocking ability of the blend adhesive film to infrared light gradually increases. When the content of sheet-like nano-CuS is 1.8%, the transmittance of infrared light is only 57.5%. Combining Figure 7It can be seen that the middle film of the blend has a certain blocking effect on infrared light. This is because the local surface plasmon resonance absorption phenomenon generated by flaky nano-CuS has a certain absorption effect on infrared, blocking the infrared light from passing through the glue film, so that the blend glue film has a certain heat insulation ability.

[0087] As can be seen from Table 3, the thermal conductivity of the blend glue film decreases first and then levels off with the increase of the dosage of flaky nano-CuS. The thermal conductivity of flaky nano-CuS is higher than that of SGP, but the thermal conductivity of the blend glue film is lower than that of SGP. This is because after ultrasonic dispersion and treatment with KH570 silane coupling agent, flaky nano-CuS can be evenly distributed in the SGP glue film. Flaky nano-CuS can be covered by the SGP matrix with low thermal conductivity and cannot form a relatively perfect heat conduction channel in the matrix, resulting in a large thermal resistance during the heat conduction process, making the blend glue film show a lower thermal conductivity than the matrix material.

[0088] The above conclusion shows that the ratio of flaky nano-CuS selected in the present invention can increase the heat insulation ability of the blend glue film by a heat insulation method of reducing the thermal conductivity and blocking.

[0089] Table 3

[0090] Sample Number Pure SGP Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Thermal Conductivity (W / (m·K)) 0.253 0.218 0.215 0.212 0.210 0.208

[0091] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A method for preparing a heat-insulating ionic film, characterized in that: The method includes the following steps: S1. Dissolve Cu(NO3)2·3H2O in an imidazole-based ionic liquid and stir magnetically until completely dissolved; after adding sericin, stir under water bath conditions to form a blue colloidal solution. S2. Transfer the blue colloidal solution to a microwave reactor for reaction to obtain nano-CuS; after the reaction ends, centrifuge to collect nano-CuS, wash it with absolute ethanol, and then obtain the product. Disperse the product in deionized water, add 1 mL of H2O2 (30%) and stir at room temperature; then centrifuge and dry to obtain sheet-like nano-CuS modified with oxygen vacancies. S3. Dissolve the silane coupling agent in absolute ethanol and stir magnetically to obtain a colorless and transparent mixed solution, and then add the sheet-like nano-CuS to the mixed solution and stir magnetically until it becomes a paste-like solution; after the stirring ends, transfer it to an ultrasonic cleaner for ultrasonic dispersion. S4. High-mix the ultrasonicated paste-like solution and SGP resin in a high-speed mixer for 5 min, then take it out and put it in a blast drying oven to dry to obtain a blend. S5. Extrude the blend into a sheet using a parallel twin-screw extruder, the thickness of the die head is 2 mm, and the processing temperature is set from the first section to the head as follows: 165 °C, 165 °C, 170 °C, 170 °C, and the screw speed is set to: 50 rpm / min; the extruded sheet is pressed and shaped by a conveyor traction machine, and after the sheet cools, it is wound up to obtain a glue film.

2. The preparation method of a heat-insulating ionic film according to claim 1, characterized in that: In the step S1, the imidazole-based ionic liquid is [EMIM][SCN] ionic liquid; the stirring time of Cu(NO3)2·3H2O and the imidazole-based ionic liquid is 25 - 35 min; the water bath temperature after adding sericin is 55 - 65 °C, and the stirring time is 50 - 70 min.

3. The preparation method of a heat-insulating ionic adhesive film according to claim 1, wherein: In the step S2, the set power in the microwave reactor is 300 W, the temperature is 100 °C, and the reaction time is 15 min.

4. The preparation method of a heat-insulating ionic adhesive film according to claim 1, characterized in that: In the step S3, the magnetic stirring time is 30 min, and the temperature is 60 °C; the ultrasonic time is 30 min, and the temperature is 50 °C.

5. The preparation method of a heat-insulating ionic adhesive film according to claim 1, characterized in that: In the step S4, the mass ratio of the paste-like solution to SGP resin is 1 - 10:100; the drying temperature in the blast drying oven is 75 - 85 °C, and the time is 3.5 - 4.5 h.

6. A method for preparing safety glass using the heat-insulating ionic film according to any one of claims 1-5, characterized in that: It includes the following steps: P1. Clamp the glue film in a square mold with a thickness of 1 mm and a length and width of 22 cm, put it into a flat vulcanizer for molding, cool the template after molding, and open the mold to take out the sample after cooling. P2. Wash the glass with distilled water and absolute ethanol, dry it in an oven, then cut the molded sheet into the same size as the glass and clamp it in the middle of the dried glass, put it into a vacuum oven for high-temperature and high-pressure treatment at 100 °C for 1 h, and finally quickly cool it to obtain SGP laminated safety glass.

7. A method for preparing safety glass using a heat-insulating ionic film according to claim 1, characterized in that: In the step P1, the temperatures of the upper and lower templates of the flat vulcanizer are both 175 °C, pre-press for 5 min, pressure 1 MPa; hold the pressure for 10 min, pressure 5 MPa; the vacuum pressure is set to -0.09 MPa, and vacuum is pumped 3 times per minute.

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