Flexible composite electrostatic adsorption film and preparation method thereof

Abstract

The invention discloses a flexible composite electrostatic adsorption film and a preparation method thereof, the flexible composite electrostatic adsorption film is formed by compounding an electrostatic film, polyester taffeta black-out cloth, oxford cloth and polyester pongee, and the electrostatic film comprises the following components in parts by weight: 20-30 parts of sodium alginate, 12-18 parts of polyethylene oxide, 10-20 parts of calcium chloride, 20-30 parts of polyvinylpyrrolidone and 15-25 parts of absolute ethyl alcohol. The novel electrostatic adsorption film is prepared by compounding the electrostatic film, the polyester taffeta shading cloth, the oxford cloth and the polyester pongee, the technology is beneficial to popularization and application, common products in life can be prepared, for example, the novel electrostatic adsorption film can be used for an automobile electrostatic film sunshade, is convenient to mount and take, can also be used for shading and privacy prevention in glass, and is suitable for popularization and application. The electrostatic film is also a novel technology and has high elasticity, high flexibility, high conductivity and high voltage resistance, the adopted materials can be directly bought from the market, the price is low, the efficiency of the preparation process is high, batch preparation can be achieved, and good application prospects are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of the preparation of electrostatic adsorption films, and specifically relates to a flexible composite electrostatic adsorption film and a preparation method thereof. Background Art

[0002] Electrostatic adsorption is an electrically controllable adsorption technology. By applying a voltage to the electrodes on the adsorption device (adsorption film), static charges are generated on the surface of the object to be adsorbed, and the electrodes interact with the charges on the object surface to generate an electrostatic adsorption force between the electrodes and the object surface.

[0003] The electrostatic film has a good electrostatic adsorption effect. However, its material has too good ductility, resulting in its inability to be compounded with other materials. Moreover, the preparation method is relatively complex, the raw materials are not easily obtained, the cost is relatively high, which is not conducive to popularization and use. The formed product has a poor adsorption effect and does not have a good market prospect, making it difficult to meet the needs of workers. Summary of the Invention

[0004] To solve the above technical problems, a flexible composite electrostatic adsorption film and a preparation method thereof are provided. The present technical solution solves the problems raised in the above background art, that is, the electrostatic film has a good electrostatic adsorption effect, but its material has too good ductility, resulting in its inability to be compounded with other materials. Moreover, the preparation method is relatively complex, the raw materials are not easily obtained, the cost is relatively high, which is not conducive to popularization and use. The formed product has a poor adsorption effect and does not have a good market prospect.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows: A flexible composite electrostatic adsorption film, which is composed of a composite of an electrostatic film, polyester taffeta light-shielding cloth, Oxford cloth and polyester pongee. The electrostatic film, calculated by weight, includes: 20-30 parts of sodium alginate, 12-18 parts of polyethylene oxide, 10-20 parts of calcium chloride, 20-30 parts of polyvinylpyrrolidone, 15-25 parts of absolute ethanol, 8-20 parts of phosphate buffer solution, and 10-18 parts of deionized water.

[0006] Preferably, it is composed of a composite of an electrostatic film, polyester taffeta light-shielding cloth, Oxford cloth and polyester pongee. The electrostatic film, calculated by weight, includes: 20 parts of sodium alginate, 12 parts of polyethylene oxide, 10 parts of calcium chloride, 20 parts of polyvinylpyrrolidone, 15 parts of absolute ethanol, 8 parts of phosphate buffer solution, and 10 parts of deionized water.

[0007] A preparation method of a flexible composite electrostatic adsorption film includes: S101. Install the electrostatic film roll on the first unwinding unit, and install the polyester taffeta light-shielding cloth, Oxford cloth and polyester pongee on the second unwinding unit, and guide the materials through the guide roller, glue tank, pressure roller to the winding device in sequence, ensuring that the path has no crossing and no friction; S102. Select a hot-melt composite adhesive, stir it for 3 - 5 minutes until it is uniform after opening the lid, and control the amount of glue injected into the glue tank to be less than 80% of the glue tank volume. S103. Adjust the gap between the rubber roller and the guide roller to ensure that the thickness of the glue layer is uniform. S104. Start the heating system. After the temperature reaches the preset value, turn on the drive motor for composite compression to obtain a flexible composite electrostatic adsorption film.

[0008] Preferably, in S103, the gap between the rubber roller and the guide roller is 0.1 - 0.3 mm.

[0009] Preferably, in S104, the preset temperature of the heating system is 70 - 100 °C.

[0010] Preferably, the preparation steps of the electrostatic film are as follows: S201. Weigh 1.0 g of sodium alginate and place it in 49 g of deionized water. Stir it in a magnetic stirrer for 8 h to obtain a sodium alginate aqueous solution with a solute mass fraction of 2.0% and a volume of 50 ml. S202. Similarly, weigh 4.0 g of polyethylene oxide and place it in 46 g of deionized water. Stir it in a magnetic stirrer for 8 h to obtain a polyethylene oxide aqueous solution with a solute mass fraction of 8.0% and a volume of 50 ml. S203. Mix the prepared sodium alginate aqueous solution and polyethylene oxide aqueous solution to prepare a spinning solution, stir it for 4 h and place it in an ultrasonic cleaner for defoaming. S204. Use an electrospinning device to adjust the spinning voltage and receiving distance during the spinning process, and collect the sodium alginate / polyethylene oxide composite fiber membrane with a polypropylene spunbond cloth as the receiving base cloth. S205. Place the experimentally prepared sodium alginate / polyethylene oxide composite fiber membrane in a calcium chloride solution and seal it for crosslinking at room temperature. S206. After the crosslinking is completed, take out the sample, wash the surface with anhydrous ethanol to remove the excess calcium chloride solution, and then dry it at room temperature for 24 h to obtain a crosslinked and modified electrostatic film.

[0011] Preferably, in S203, the volume ratio of the sodium alginate aqueous solution to the polyethylene oxide aqueous solution is 1:1.

[0012] Preferably, in S204, the spinning process is carried out under the conditions of a humidity of 40% and a temperature of 25 °C.

[0013] Preferably, in S205, the crosslinking reaction is sealed at room temperature for 4 h.

[0014] Preferably, in S206, it is dried at room temperature for 24 h.

[0015] Compared with the prior art, the present invention provides a flexible composite electrostatic adsorption film and a preparation method thereof, having the following beneficial effects: The present invention prepares a new type of electrostatic adsorption film by compounding an electrostatic film, a taffeta light-shielding cloth, an Oxford cloth and a polyester pongee. This technology is conducive to popularization and can be used to prepare common products in life, such as electrostatic film sunshades for cars, which are convenient to install and take, and can also be used for internal sunshading, light shielding and privacy protection of glass. Moreover, the electrostatic film in the present invention is also a new technology, having high elasticity, high flexibility, high conductivity, high voltage resistance. The materials used can be directly purchased from the market, with affordable prices. The preparation process is efficient, can be prepared in batches, and has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the preparation method of the flexible composite electrostatic adsorption film in the present invention; Figure 2 It is a schematic diagram of the preparation method of the electrostatic film in the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations.

[0018] Example 1 A flexible composite electrostatic adsorption film, comprising an electrostatic film, a taffeta light-shielding cloth, an Oxford cloth and a polyester pongee compounded together. The electrostatic film, by weight, comprises: 20 parts of sodium alginate, 12 parts of polyethylene oxide, 10 parts of calcium chloride, 20 parts of polyvinylpyrrolidone, 15 parts of absolute ethanol, 8 parts of phosphate buffer solution, and 10 parts of deionized water.

[0019] Please refer to Figure 1 As shown, a preparation method of a flexible composite electrostatic adsorption film comprises: S101. Install the electrostatic film roll on the first unwinding unit, and install the taffeta light-shielding cloth, the Oxford cloth and the polyester pongee on the second unwinding unit, and guide the materials through the guide roller, the glue tank, the pressure roller to the winding device in sequence, ensuring no cross and no friction in the path; S102. Select a hot melt composite adhesive, stir for 3 - 5 minutes until uniform after opening the cover, and control the glue amount to be less than 80% of the glue tank volume when injecting into the glue tank; S103. Adjust the gap between the rubber roller and the guide roller to ensure uniform thickness of the glue layer; S104. Start the heating system, after the temperature reaches the preset value, start the drive motor for composite compression to obtain a flexible composite electrostatic adsorption film.

[0020] The gap between the rubber roller and the guide roller in S103 is 0.1 - 0.3 mm.

[0021] The preset temperature of the heating system in S104 is 70-100 °C.

[0022] Please refer to Figure 2 As shown in the figure, the preparation steps of the electrostatic film are as follows: S201. Weigh 1.0 g of sodium alginate and place it in 49 g of deionized water. Stir it in a magnetic stirrer for 8 h to obtain an aqueous sodium alginate solution with a solute mass fraction of 2.0% and a volume of 50 ml. S202. Similarly, weigh 4.0 g of polyethylene oxide and place it in 46 g of deionized water. Stir it in a magnetic stirrer for 8 h to obtain an aqueous polyethylene oxide solution with a solute mass fraction of 8.0% and a volume of 50 ml. S203. Mix the prepared aqueous sodium alginate solution and aqueous polyethylene oxide solution to prepare a spinning solution. Stir it for 4 h and place it in an ultrasonic cleaner for defoaming. S204. Use an electrospinning device to adjust the spinning voltage and receiving distance during the spinning process, and collect the sodium alginate / polyethylene oxide composite fiber membrane with a polypropylene spunbond fabric as the receiving base fabric. S205. Place the experimentally prepared sodium alginate / polyethylene oxide composite fiber membrane in a calcium chloride solution and seal it for crosslinking at room temperature. S206. After the crosslinking is completed, take out the sample, wash the surface with excess calcium chloride solution with absolute ethanol, and then dry it at room temperature for 24 h to obtain a crosslinked and modified electrostatic film.

[0023] In S203, the volume ratio of the aqueous sodium alginate solution to the aqueous polyethylene oxide solution is 1:1.

[0024] In S204, the spinning process is carried out under the conditions of a humidity of 40% and a temperature of 25 °C.

[0025] In S205, the crosslinking reaction is carried out for 4 h at room temperature in a sealed state.

[0026] In S206, it is dried at room temperature for 24 h.

[0027] Example 2 A flexible composite electrostatic adsorption film, which is composed of an electrostatic film, polyester taffeta light-shielding cloth, Oxford cloth and spring sub-fabric. The electrostatic film includes, by weight: 25 parts of sodium alginate, 15 parts of polyethylene oxide, 15 parts of calcium chloride, 25 parts of polyvinylpyrrolidone, 20 parts of absolute ethanol, 15 parts of phosphate buffer solution, and 15 parts of deionized water.

[0028] Please refer to Figure 1 As shown in the figure, a preparation method of a flexible composite electrostatic adsorption film includes: S101. Install the static film roll on the first unwinding unit, install the taffeta light-blocking cloth, Oxford cloth and polyester pongee on the second unwinding unit, and guide the materials through the guide roller, glue tank, pressure roller to the winding device in sequence, ensuring that the path has no intersection and no friction; S102. Select a hot-melt composite adhesive, stir it for 3 - 5 minutes until it is uniform after opening the lid, and control the amount of glue injected into the glue tank to be less than 80% of the glue tank volume; S103. Adjust the gap between the rubber roller and the guide roller to ensure that the thickness of the glue layer is uniform; S104. Start the heating system, after the temperature reaches the preset value, turn on the drive motor for composite compression to obtain a flexible composite static adsorption film.

[0029] In S103, the gap between the rubber roller and the guide roller is 0.1 - 0.3 mm.

[0030] In S104, the preset temperature of the heating system is 70 - 100 °C.

[0031] Please refer to Figure 2 as shown, the preparation steps of the static film are as follows: S201. Weigh 1.0 g of sodium alginate and place it in 49 g of deionized water, stir it in a magnetic stirrer for 8 h to obtain a sodium alginate aqueous solution with a solute mass fraction of 2.0% and a volume of 50 ml; S202. Similarly, weigh 4.0 g of polyethylene oxide and place it in 46 g of deionized water, stir it in a magnetic stirrer for 8 h to obtain a polyethylene oxide aqueous solution with a solute mass fraction of 8.0% and a volume of 50 ml; S203. Mix the prepared sodium alginate aqueous solution and polyethylene oxide aqueous solution to prepare a spinning solution, stir it for 4 h and place it in an ultrasonic cleaner for defoaming; S204. Use an electrospinning device to adjust the spinning voltage and receiving distance during the spinning process, and collect the sodium alginate / polyethylene oxide composite fiber membrane with a polypropylene spunbond cloth as the receiving base cloth; S205. Place the experimentally prepared sodium alginate / polyethylene oxide composite fiber membrane in a calcium chloride solution and seal it for crosslinking at room temperature; S206. After the crosslinking is completed, take out the sample, wash the surface with excess calcium chloride solution with absolute ethanol, and then dry it at room temperature for 24 h to obtain a crosslinked and modified static film.

[0032] In S203, the volume ratio of the sodium alginate aqueous solution to the polyethylene oxide aqueous solution is 1:1.

[0033] In S204, the spinning process is carried out under the conditions of a humidity of 40% and a temperature of 25 °C.

[0034] In S205, the crosslinking reaction is sealed at room temperature for 4 h.

[0035] Air dry at room temperature for 24 h in S206.

[0036] Example 3 A flexible composite electrostatic adsorption film, which is composed of an electrostatic film, taffeta light-shielding cloth, Oxford cloth and polyester pongee. The electrostatic film includes, by weight: 30 parts of sodium alginate, 18 parts of polyethylene oxide, 20 parts of calcium chloride, 30 parts of polyvinylpyrrolidone, 25 parts of absolute ethanol, 20 parts of phosphate buffer solution, and 18 parts of deionized water.

[0037] Please refer to Figure 1 As shown, a preparation method of a flexible composite electrostatic adsorption film includes: S101. Install the electrostatic film roll on the first unwinding unit, install the taffeta light-shielding cloth, Oxford cloth and polyester pongee on the second unwinding unit, and guide the materials through the guide roller, glue tank, pressure roller to the winding device in sequence, ensuring that the path has no intersection and no friction; S102. Select a hot-melt composite adhesive, stir for 3 - 5 minutes until uniform after opening the lid, and control the glue volume below 80% of the glue tank volume when injecting it into the glue tank; S103. Adjust the gap between the rubber roller and the guide roller to ensure uniform glue layer thickness; S104. Start the heating system, and after the temperature reaches the preset value, start the drive motor for composite compression to obtain a flexible composite electrostatic adsorption film.

[0038] In S103, the gap between the rubber roller and the guide roller is 0.1 - 0.3 mm.

[0039] In S104, the preset temperature of the heating system is 70 - 100 °C.

[0040] Please refer to Figure 2 As shown, the preparation steps of the electrostatic film are as follows: S201. Weigh 1.0 g of sodium alginate and place it in 49 g of deionized water, stir in a magnetic stirrer for 8 h to obtain a sodium alginate aqueous solution with a solute mass fraction of 2.0% and a volume of 50 ml; S202. Similarly, weigh 4.0 g of polyethylene oxide and place it in 46 g of deionized water, stir in a magnetic stirrer for 8 h to obtain a polyethylene oxide aqueous solution with a solute mass fraction of 8.0% and a volume of 50 ml; S203. Mix the prepared sodium alginate aqueous solution and polyethylene oxide aqueous solution to prepare a spinning solution, stir for 4 h and place it in an ultrasonic cleaner for defoaming; S204. Use an electrospinning device to adjust the spinning voltage and receiving distance during the spinning process, and collect the sodium alginate / polyethylene oxide composite fiber membrane with a polypropylene spunbond cloth as the receiving base cloth; S205. Place the sodium alginate / polyethylene oxide composite fiber membrane prepared by experiment in a calcium chloride solution and seal it for crosslinking at room temperature. S206. After the crosslinking is completed, take out the specimen, wash the excess calcium chloride solution on the surface with absolute ethanol, and then air-dry it at room temperature for 24 h to obtain a crosslinked and modified electrostatic membrane.

[0041] In S203, the volume ratio of the sodium alginate aqueous solution to the polyethylene oxide aqueous solution is 1:1.

[0042] In S204, the spinning process is carried out under the conditions of a humidity of 40% and a temperature of 25 °C.

[0043] In S205, the crosslinking reaction is sealed at room temperature for 4 h.

[0044] In S206, it is air-dried at room temperature for 24 h.

[0045] Example 4 A flexible composite electrostatic adsorption membrane, which is composed of an electrostatic membrane, polyester taffeta light-shielding cloth, Oxford cloth and spring sub-fabric. The electrostatic membrane includes, by weight: 25 parts of sodium alginate, 18 parts of polyethylene oxide, 20 parts of calcium chloride, 30 parts of polyvinylpyrrolidone, 20 parts of absolute ethanol, 18 parts of phosphate buffer solution, and 10 parts of deionized water.

[0046] Please refer to Figure 1 As shown, a preparation method of a flexible composite electrostatic adsorption membrane includes: S101. Install the electrostatic membrane roll on the first unwinding unit, install the polyester taffeta light-shielding cloth, Oxford cloth and spring sub-fabric on the second unwinding unit, and guide the materials through the guide roller, glue tank, pressure roller to the winding device in sequence to ensure that there is no crossing and no friction in the path. S102. Select a hot-melt composite adhesive, stir it for 3 - 5 minutes until it is uniform after opening the lid, and control the amount of glue injected into the glue tank to be less than 80% of the volume of the glue tank. S103. Adjust the gap between the rubber roller and the guide roller to ensure that the thickness of the glue layer is uniform. S104. Start the heating system. After the temperature reaches the preset value, start the drive motor for composite compression to obtain a flexible composite electrostatic adsorption membrane.

[0047] In S103, the gap between the rubber roller and the guide roller is 0.1 - 0.3 mm.

[0048] In S104, the preset temperature of the heating system is 70 - 100 °C.

[0049] Please refer to Figure 2 As shown, the preparation steps of the electrostatic membrane are as follows: S201. Weigh 1.0 g of sodium alginate and place it in 49 g of deionized water. Stir it in a magnetic stirrer for 8 h to obtain an aqueous sodium alginate solution with a solute mass fraction of 2.0% and a volume of 50 ml. S202. Similarly, weigh 4.0 g of polyethylene oxide and place it in 46 g of deionized water. Stir it in a magnetic stirrer for 8 h to obtain an aqueous polyethylene oxide solution with a solute mass fraction of 8.0% and a volume of 50 ml. S203. Mix the prepared aqueous sodium alginate solution and aqueous polyethylene oxide solution to prepare a spinning solution. Stir it for 4 h and place it in an ultrasonic cleaner for degassing. S204. Use an electrospinning device to adjust the spinning voltage and receiving distance during the spinning process, and collect the sodium alginate / polyethylene oxide composite fiber membrane with a polypropylene spunbond cloth as the receiving base cloth. S205. Place the experimentally prepared sodium alginate / polyethylene oxide composite fiber membrane in a calcium chloride solution and seal it for crosslinking at room temperature. S206. After the crosslinking is completed, take out the sample, wash the surface with excess calcium chloride solution with absolute ethanol, and then dry it at room temperature for 24 h to obtain a crosslinked and modified electrostatic membrane.

[0050] In S203, the volume ratio of the aqueous sodium alginate solution to the aqueous polyethylene oxide solution is 1:1.

[0051] In S204, the spinning process is carried out under the conditions of a humidity of 40% and a temperature of 25 °C.

[0052] In S205, the crosslinking reaction is sealed at room temperature for 4 h.

[0053] In S206, it is dried at room temperature for 24 h.

[0054] Example 5 A flexible composite electrostatic adsorption membrane, which is composed of a composite of an electrostatic membrane, taffeta light-shielding cloth, Oxford cloth and polyester pongee. The electrostatic membrane includes, by weight: 20 parts of sodium alginate, 18 parts of polyethylene oxide, 20 parts of calcium chloride, 25 parts of polyvinylpyrrolidone, 25 parts of absolute ethanol, 18 parts of phosphate buffer solution, and 18 parts of deionized water.

[0055] Please refer to Figure 1 As shown, a preparation method of a flexible composite electrostatic adsorption membrane includes: S101. Install the electrostatic membrane roll on the first unwinding unit, install the taffeta light-shielding cloth, Oxford cloth and polyester pongee on the second unwinding unit, and guide the materials through the guide roller, glue tank, pressure roller to the winding device in turn, ensuring that the path has no crossing and no friction. S102. Select a hot-melt composite adhesive, stir it for 3 - 5 minutes until it is uniform after opening the lid, and control the glue volume below 80% of the glue tank volume when injecting it into the glue tank. S103. Adjust the gap between the rubber roller and the guide roller to ensure uniform thickness of the rubber layer; S104. Start the heating system. After the temperature reaches the preset value, turn on the drive motor for composite compression to obtain a flexible composite electrostatic adsorption film.

[0056] In S103, the gap between the rubber roller and the guide roller is 0.1 - 0.3 mm.

[0057] In S104, the preset temperature of the heating system is 70 - 100 °C.

[0058] Please refer to Figure 2 as shown below for the preparation steps of the electrostatic film: S201. Weigh 1.0 g of sodium alginate and place it in 49 g of deionized water. Stir in a magnetic stirrer for 8 h to obtain a sodium alginate aqueous solution with a solute mass fraction of 2.0% and a volume of 50 ml; S202. Similarly, weigh 4.0 g of polyethylene oxide and place it in 46 g of deionized water. Stir in a magnetic stirrer for 8 h to obtain a polyethylene oxide aqueous solution with a solute mass fraction of 8.0% and a volume of 50 ml; S203. Mix the prepared sodium alginate aqueous solution and polyethylene oxide aqueous solution to prepare a spinning solution. Stir for 4 h and place it in an ultrasonic cleaner for defoaming; S204. Use an electrospinning device to adjust the spinning voltage and receiving distance during the spinning process, and collect the sodium alginate / polyethylene oxide composite fiber membrane with a polypropylene spunbond fabric as the receiving substrate; S205. Place the experimentally prepared sodium alginate / polyethylene oxide composite fiber membrane in a calcium chloride solution and seal it for crosslinking at room temperature; S206. After crosslinking is completed, take out the sample, wash the surface with excess calcium chloride solution with anhydrous ethanol, and then dry it at room temperature for 24 h to obtain a crosslinked and modified electrostatic film.

[0059] In S203, the volume ratio of the sodium alginate aqueous solution to the polyethylene oxide aqueous solution is 1:1.

[0060] In S204, the spinning process is carried out under the conditions of a humidity of 40% and a temperature of 25 °C.

[0061] In S205, the crosslinking reaction is carried out for 4 h under sealed conditions at room temperature.

[0062] In S206, it is dried at room temperature for 24 h.

[0063] In summary, the present invention prepares a novel electrostatic adsorption film by compounding an electrostatic film, taffeta light-blocking cloth, Oxford cloth and polyester pongee. This technology is conducive to popularization and can be used to prepare common products in life, such as electrostatic film sunshades for cars, which are convenient to install and take. It can also be used for internal sunshading, light-blocking and privacy protection of glass. Moreover, the electrostatic film in the present invention is also a novel technology, with high elasticity, high flexibility, high conductivity and high voltage resistance. The materials used can be directly purchased from the market, with affordable prices. The preparation process is efficient and can be mass-produced, having good application prospects.

[0064] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the principles described in the specification are only for the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A flexible composite electrostatic adsorption film, characterized in that: The invention comprises an electrostatic film, polyester taffeta shading cloth, oxford cloth and polyester pongee. The electrostatic film comprises, by weight, 20-30 parts of sodium alginate, 12-18 parts of polyethylene oxide, 10-20 parts of calcium chloride, 20-30 parts of polyvinyl pyrrolidone, 15-25 parts of anhydrous ethanol, 8-20 parts of phosphate buffer solution and 10-18 parts of deionized water.

2. A flexible composite electrostatic adsorption film according to claim 1, characterized in that: The invention comprises an electrostatic film, polyester taffeta shading cloth, oxford cloth and polyester pongee. The electrostatic film comprises, by weight, 20 parts of sodium alginate, 12 parts of polyethylene oxide, 10 parts of calcium chloride, 20 parts of polyvinyl pyrrolidone, 15 parts of anhydrous ethanol, 8 parts of phosphate buffer solution and 10 parts of deionized water.

3. A method for preparing a flexible composite electrostatic adsorption film, characterized in that: include: S101, install the electrostatic film roll on the first unwinding unit, install the polyester taffeta blackout cloth, Oxford cloth and polyester pongee on the second unwinding unit, and guide the materials to pass through the guide roller, the glue groove, the pressure roller to the winding device in sequence, ensuring that there is no cross and friction on the path; S102, use hot melt composite adhesive, stir for 3-5 minutes after opening the cover until it is evenly mixed, and control the amount of adhesive to be less than 80% of the volume of the adhesive tank when injecting it into the adhesive tank; S103, adjust the gap between the rubber roller and the guide roller to ensure uniform thickness of the rubber layer; S104, starting the heating system, and after the temperature reaches a preset value, turning on the transmission motor to perform composite compression to obtain a flexible composite electrostatic adsorption film.

4. The method for preparing a flexible composite electrostatic adsorption film according to claim 3, characterized in that: The preset temperature of the heating system in S104 is 70-100°C.

5. The method for preparing a flexible composite electrostatic adsorption film according to claim 3, characterized in that: In the S103, the gap between the rubber roller and the guide roller is 0.1-0.3 mm.

6. The method for preparing a flexible composite electrostatic adsorption film according to claim 3, characterized in that: The preparation steps of the electrostatic film are as follows: S201, weigh 1.0 g of sodium alginate and put it into 49 g of deionized water, stir it in a magnetic stirrer for 8 hours to obtain a sodium alginate aqueous solution with a solute mass fraction of 2.0% and a volume of 50 ml; S202, similarly weighing 4.0 g of polyethylene oxide and placing it in 46 g of deionized water, placing it in a magnetic stirrer and stirring it for 8 hours to obtain a polyethylene oxide aqueous solution with a solute mass fraction of 8.0% and a volume of 50 ml; S203, mixing the prepared sodium alginate aqueous solution and polyethylene oxide aqueous solution to prepare a spinning solution, stirring for 4 hours and placing in an ultrasonic cleaning machine for degassing; S204, using an electrospinning device, adjusting the spinning voltage and receiving distance during the spinning process, and collecting the sodium alginate / polyethylene oxide composite fiber membrane using a polypropylene spunbond fabric as a receiving base fabric; S205, placing the sodium alginate / polyethylene oxide composite fiber membrane prepared in the experiment in a calcium chloride solution, and sealing and cross-linking at room temperature; S206. After the cross-linking is completed, take out the sample, clean the excess calcium chloride solution on the surface with anhydrous ethanol, and then dry it at room temperature for 24 hours to obtain a cross-linked modified electrostatic film.

7. The method for preparing a flexible composite electrostatic adsorption film according to claim 6, characterized in that: The spinning process in S204 is carried out under the conditions of a humidity of 40% and a temperature of 25°C.

8. The method for preparing a flexible composite electrostatic adsorption film according to claim 6, characterized in that: In the S205, the cross-linking reaction is sealed at room temperature for 4 hours.

9. The method for preparing a flexible composite electrostatic adsorption film according to claim 6, characterized in that: The volume ratio of the sodium alginate aqueous solution to the polyethylene oxide aqueous solution in S203 is 1:

1.

10. The method for preparing a flexible composite electrostatic adsorption film according to claim 6, characterized in that: In the S206, the mixture is dried at room temperature for 24 hours.

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