Laryngoscopic lens with anti-fog function and preparation method thereof

Abstract

The invention relates to the technical field of preparation of medical instruments, and particularly discloses a laryngoscopic lens with an anti-fog function and a preparation method thereof.The preparation method comprises the steps that firstly, nano-silica is modified, and a sodium p-styrenesulfonate polymer is grafted to the surface of the nano-silica; then N-vinyl pyrrolidone and 1-vinyl-3-ethylimidazole bis (trifluoromethanesulfonyl) imide salt are used as main raw materials, a hydrophilic polymer chain is formed through free radical polymerization reaction, then the hydrophilic polymer chain is compounded with sodium p-styrenesulfonate polymer grafted nano silicon dioxide, and the anti-fog coating liquid is obtained. The prepared anti-fog coating liquid has good hydrophilic performance, and a coating formed after curing has excellent anti-fog performance and light transmittance.

Description

Technical Field

[0001] The invention relates to the technical field of medical device preparation, and in particular to a laryngoscope blade with an anti-fogging function and a preparation method thereof. Background Art

[0002] Laryngoscope blades are important tools used in the medical field to examine and treat laryngeal diseases, and their performance directly affects the accuracy of diagnosis and the convenience of operation. Since laryngoscopy usually needs to be performed in the patient's throat, the hot and humid air in the throat easily forms fog when it contacts the surface of the blade, resulting in blurred vision, which seriously affects the doctor's operating efficiency and diagnostic effect. Therefore, existing laryngoscope blades generally face the problem of insufficient anti-fogging performance during use. This problem is particularly prominent during long-term operation or high ambient temperature, which brings many inconveniences to clinical work.

[0003] At present, the mainstream anti-fogging technology for laryngoscope blades on the market mainly relies on adding a heating device or coating treatment. By adding a heating device to heat the corresponding lens to eliminate the temperature difference, the purpose of removing water mist is achieved. However, adding a heating device will increase the difficulty of structural setting for products with more lenses, increase resource waste and cost; coating treatment is currently a more commonly used method. Coating treatment is to reduce fog formation by coating anti-fogging materials on the surface of the lens substrate, but its effect is often not long-lasting and is easily ineffective due to frequent cleaning or friction.

[0004] Therefore, developing a laryngoscope blade with long-lasting and stable anti-fog performance has become an important research direction in the current medical equipment field. Laryngoscope blades with long-lasting anti-fog performance have broad market prospects. Summary of the invention

[0005] In view of the deficiencies in the prior art, an object of the present invention is to provide a laryngoscope blade with anti-fogging function and a preparation method thereof.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme:

[0007] A laryngoscope blade with anti-fog function, the laryngoscope blade comprising a substrate and an anti-fog coating coated on the surface of the substrate, and a method for preparing an anti-fog coating liquid used in the anti-fog coating, comprising the following steps:

[0008] S1, ultrasonically dispersing nano-silica in an ethanol aqueous solution, then adding vinyl triethoxysilane thereto, stirring for reaction, then adding sodium styrene sulfonate and an initiator thereto, heating and stirring for reaction, and after the reaction is completed, centrifuging, washing, and freeze-drying to obtain modified nano-silica;

[0009] S2, ultrasonically dispersing the modified nano-silicon dioxide in deionized water to obtain solution A for later use;

[0010] S3. Add N-vinylpyrrolidone to deionized water, stir to dissolve, then add 1-vinyl-3-ethylimidazolium bis(trifluoromethanesulfonyl)imide and ammonium persulfate thereto, heat and stir for reaction. After the reaction is completed, cool to room temperature to obtain Solution B;

[0011] S4. Under stirring, add Solution A to Solution B and mix evenly to obtain the anti-fog coating liquid.

[0012] Specifically, in step S1, the mass ratio of nano-silica, vinyltriethoxysilane, sodium styrenesulfonate and initiator is 8-12:1-2:4-8:0.5-1.

[0013] Specifically, in step S1, the temperature of the heating and stirring reaction is 50-70°C, and the time of the heating and stirring reaction is 3-5 h.

[0014] Specifically, in step S2, the mass ratio of the modified nano-silica to deionized water is 10-15:100.

[0015] Specifically, in step S3, the mass ratio of N-vinylpyrrolidone, deionized water, 1-vinyl-3-ethylimidazolium bis(trifluoromethanesulfonyl)imide and ammonium persulfate is 20-40:200-300:5-10:1-2.

[0016] Specifically, in step S3, the temperature of the heating and stirring reaction is 60-80°C, and the time of the heating and stirring reaction is 2-5 h.

[0017] Specifically, in step S4, the mass ratio of Solution A to Solution B is 20-40:100.

[0018] Specifically, the material of the substrate is selected from polyacrylic resin, polycarbonate resin, polymethyl methacrylate resin, polyethylene terephthalate resin, polybutylene terephthalate or polyimide resin.

[0019] Specifically, the coating process is spraying, scraping, spin coating or dip coating.

[0020] The present invention also provides a preparation method of the above-mentioned laryngeal lens with anti-fog function, including the following steps: coat the anti-fog coating liquid on the surface of the substrate, dry it, and form an anti-fog coating on the surface of the substrate to obtain the laryngeal lens with anti-fog function.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) In the present invention, nano-silica is first modified, and sodium styrene sulfonate polymer is grafted onto the surface of nano-silica. Subsequently, using N-vinylpyrrolidone and 1-vinyl-3-ethylimidazolium bis(trifluoromethanesulfonyl)imide as the main raw materials, a hydrophilic polymer chain is formed through a free radical polymerization reaction, and then it is compounded with sodium styrene sulfonate polymer grafted nano-silica to obtain an anti-fog coating solution. The anti-fog coating solution prepared by the present invention has good hydrophilic properties, and the coating formed after curing has excellent anti-fog properties and light transmittance.

[0023] (2) For the first time in the present invention, N-vinylpyrrolidone monomer and 1-vinyl-3-ethylimidazolium bis(trifluoromethanesulfonyl)imide are used as the main film-forming substances, and 1-vinyl-3-ethylimidazolium bis(trifluoromethanesulfonyl)imide is introduced into the polymer molecular chain. 1-vinyl-3-ethylimidazolium bis(trifluoromethanesulfonyl)imide has a low surface tension and good wettability, and can effectively spread on the surface of the substrate to form a uniform thin film, which helps to reduce interface defects and enhance the binding force between the polymer molecular chain and the substrate, forming a stable coating on the surface of the substrate, thereby improving the anti-fog performance.

[0024] (3) In the present invention, sodium styrene sulfonate polymer is grafted onto the surface of nano-silica, which improves the hydrophilicity and surface activity of nano-silica. At the same time, compared with the acrylic polymer commonly used in the prior art, sodium styrene sulfonate polymer has better anti-fog stability and light transmittance. The reason may be that the sulfonic acid group in sodium styrene sulfonate polymer is negatively charged and can undergo electrostatic interaction with the imidazole group in 1-vinyl-3-ethylimidazolium bis(trifluoromethanesulfonyl)imide, enhancing the intermolecular interaction force, and thus effectively improving the anti-fog stability of the coating. At the same time, the sodium styrene sulfonate polymer contains a benzene ring group, which has a relatively strong absorption effect on ultraviolet light, thereby improving the light transmittance of the coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of a laryngeal lens with anti-fog function provided by the present invention;

[0026] Figure 2 is a graph showing the anti-fog performance test results of different groups provided by the present invention;

[0027] Figure 3 is a graph showing the test results of visible light transmittance of different groups provided by the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0028] The present invention will be further described in detail below through specific preferred embodiments, but the present invention is not limited to the following embodiments.

[0029] It should be noted that unless otherwise specified, the chemical reagents involved in the present invention are all purchased through commercial channels.

[0030] As Figure 1 shown, the present invention provides a laryngeal lens with an anti-fog function, and the laryngeal lens includes a substrate 1 and an anti-fog coating 2 coated on the surface of the substrate.

[0031] Specifically, the substrate used in the present invention is a processed and formed laryngeal lens substrate.

[0032] Specifically, the material of the substrate is selected from polyacrylic resin, polycarbonate resin, polymethyl methacrylate resin, polyethylene terephthalate resin, polybutylene terephthalate or polyimide resin.

[0033] Specifically, in the present invention, the anti-fog coating liquid can also be coated on the entire surface of the substrate.

[0034] Specifically, the coating process used in the present invention includes spraying, scraping, spin coating or dip coating.

[0035] Specifically, the preparation method of the anti-fog coating liquid used in the present invention includes the following steps:

[0036] S1. Prepare modified nano-silica

[0037] Ultrasonically disperse nano-silica in an ethanol aqueous solution, then add vinyltriethoxysilane thereto, stir and react, then add sodium styrenesulfonate and an initiator thereto, heat and stir to react, and after the reaction is completed, centrifuge, wash, and freeze-dry to obtain modified nano-silica;

[0038] In this step, the mass ratio of nano-silica, vinyltriethoxysilane, sodium styrenesulfonate and the initiator is 8-12:1-2:4-8:0.5-1.

[0039] Specifically, the initiator is selected from persulfates, and for example, sodium persulfate, potassium persulfate or ammonium persulfate can be selected.

[0040] In this step, the stirring reaction time is 1-2 h, and for example, 1 h, 1.5 h, 2 h can be selected, but it is not limited to the listed values, and other unlisted values within the numerical range are equally applicable.

[0041] In this step, the temperature of the heat and stir reaction is 50-70 °C, and for example, 50 °C, 55 °C, 60 °C, 65 °C, 70 °C can be selected; the heat and stir reaction time is 3-5 h, and for example, 3 h, 3.5 h, 4 h, 4.5 h, 5 h can be selected, but it is not limited to the listed values, and other unlisted values within the numerical range are equally applicable.

[0042] In this step, nano-silica is first treated with vinyltriethoxysilane to graft double bonds on the surface of nano-silica. Subsequently, through the addition reaction between the double bonds, sodium styrene sulfonate polymer is grafted on the surface of nano-silica, improving the hydrophilicity and surface activity of nano-silica.

[0043] S2. Prepare Solution A

[0044] The modified nano-silica is ultrasonically dispersed in deionized water to obtain Solution A for standby.

[0045] In this step, the mass ratio of the modified nano-silica to deionized water is 10 - 15:100. In some embodiments of the present invention, for example, 10:100, 11:100, 12:100, 13:100, 14:100, 15:100 can be selected, but it is not limited to the listed values, and other unlisted values within the numerical range are equally applicable.

[0046] S3. Prepare Solution B

[0047] N-vinylpyrrolidone is added to deionized water and stirred until dissolved. Then, 1-vinyl-3-ethylimidazolium bis(trifluoromethanesulfonyl)imide and ammonium persulfate are added thereto, and the mixture is heated and stirred for reaction. After the reaction is completed, it is cooled to room temperature to obtain Solution B.

[0048] In this step, the mass ratio of N-vinylpyrrolidone, deionized water, 1-vinyl-3-ethylimidazolium bis(trifluoromethanesulfonyl)imide, and ammonium persulfate is 20 - 40:200 - 300:5 - 10:1 - 2.

[0049] In this step, the temperature of the heating and stirring reaction is 60 - 80°C, for example, 60°C, 65°C, 70°C, 75°C, 80°C can be selected; the time of the heating and stirring reaction is 2 - 5 h, for example, 2 h, 2.5 h, 3 h, 3.5 h, 4 h, 4.5 h, 5 h, but it is not limited to the listed values, and other unlisted values within the numerical range are equally applicable.

[0050] In this step, under the action of the initiator ammonium persulfate, N-vinylpyrrolidone and 1-vinyl-3-ethylimidazolium bis(trifluoromethanesulfonyl)imide undergo a double bond addition reaction to form a polymer.

[0051] S4. Prepare the anti-fog coating liquid

[0052] While stirring, Solution A is added to Solution B and mixed evenly to obtain the anti-fog coating liquid.

[0053] In this step, the mass ratio of solution A to solution B is 20 - 40:100. For example, 20:100, 25:100, 30:100, 35:100, 40:100 can be selected, but it is not limited to the listed values. Other unlisted values within the numerical range are equally applicable.

[0054] The anti-fog coating liquid in the present invention will be further described through specific examples below. The particle size of the nano-silica is 20 - 30 nm, and the CAS number of 1-vinyl-3-ethylimidazolium bis(trifluoromethylsulfonyl)imide is 204854-22-8.

[0055] Example 1

[0056] A preparation method of an anti-fog coating liquid includes the following steps:

[0057] S1. Ultrasonically disperse 10 g of nano-silica in 100 mL of 60 wt% ethanol aqueous solution, then add 1.5 g of vinyltriethoxysilane thereto, stir and react at room temperature for 2 h. Subsequently, add 6 g of sodium styrenesulfonate and 0.8 g of initiator ammonium persulfate, heat and stir at 50 °C for 5 h. After the reaction is completed, centrifuge, wash, and freeze-dry to obtain modified nano-silica;

[0058] S2. Ultrasonically disperse 12 g of modified nano-silica in 100 mL of deionized water to obtain solution A for standby;

[0059] S3. Add 30 g of N-vinylpyrrolidone to 250 mL of deionized water, stir and dissolve it. Then add 8 g of 1-vinyl-3-ethylimidazolium bis(trifluoromethylsulfonyl)imide and 1.5 g of ammonium persulfate, heat and stir at 60 °C for 5 h. After the reaction is completed, cool to room temperature to obtain solution B;

[0060] S4. Under stirring, add 30 g of solution A to 100 g of solution B and mix evenly to obtain the anti-fog coating liquid.

[0061] Example 2

[0062] A preparation method of an anti-fog coating liquid includes the following steps:

[0063] S1. Ultrasonically disperse 8 g of nano-silica in 100 mL of 60 wt% ethanol aqueous solution, then add 1 g of vinyltriethoxysilane thereto, stir and react at room temperature for 2 h. Subsequently, add 4 g of sodium styrenesulfonate and 0.5 g of initiator ammonium persulfate, heat and stir at 70 °C for 3 h. After the reaction is completed, centrifuge, wash, and freeze-dry to obtain modified nano-silica;

[0064] S2. Ultrasonically disperse 10 g of modified nano-silica in 100 mL of deionized water to obtain solution A for later use;

[0065] S3. Add 20 g of N-vinylpyrrolidone to 200 mL of deionized water, stir to dissolve, then add 5 g of 1-vinyl-3-ethylimidazolium bis(trifluoromethylsulfonyl)imide and 1 g of ammonium persulfate thereto, heat and stir the reaction at 80 °C for 2 h. After the reaction is completed, cool to room temperature to obtain solution B;

[0066] S4. Under stirring, add 20 g of solution A to 100 g of solution B and mix evenly to obtain the anti-fog coating liquid.

[0067] Example 3

[0068] A method for preparing an anti-fog coating liquid, comprising the following steps:

[0069] S1. Ultrasonically disperse 12 g of nano-silica in 100 mL of 60 wt% ethanol aqueous solution, then add 2 g of vinyltriethoxysilane thereto, stir and react at room temperature for 2 h. Subsequently, add 8 g of sodium styrenesulfonate and 1 g of initiator ammonium persulfate thereto, heat and stir the reaction at 60 °C for 4 h. After the reaction is completed, perform centrifugation, washing, and freeze-drying to obtain modified nano-silica;

[0070] S2. Ultrasonically disperse 15 g of modified nano-silica in 100 mL of deionized water to obtain solution A for later use;

[0071] S3. Add 40 g of N-vinylpyrrolidone to 300 mL of deionized water, stir to dissolve, then add 10 g of 1-vinyl-3-ethylimidazolium bis(trifluoromethylsulfonyl)imide and 2 g of ammonium persulfate thereto, heat and stir the reaction at 70 °C for 3 h. After the reaction is completed, cool to room temperature to obtain solution B;

[0072] S4. Under stirring, add 40 g of solution A to 100 g of solution B and mix evenly to obtain the anti-fog coating liquid.

[0073] Example 4

[0074] A method for preparing an anti-fog coating liquid, comprising the following steps:

[0075] S1. Ultrasonically disperse 10 g of nano-silica in 100 mL of 60 wt% ethanol aqueous solution, then add 1.5 g of vinyltriethoxysilane thereto, stir and react at room temperature for 2 h. Subsequently, add 5 g of sodium styrenesulfonate and 1 g of initiator ammonium persulfate thereto, heat and stir the reaction at 60 °C for 4 h. After the reaction is completed, perform centrifugation, washing, and freeze-drying to obtain modified nano-silica;

[0076] S2. Ultrasonically disperse 15 g of modified nano-silica in 100 mL of deionized water to obtain solution A for standby;

[0077] S3. Add 25 g of N-vinylpyrrolidone to 300 mL of deionized water, stir to dissolve, then add 6 g of 1-vinyl-3-ethylimidazolium bis(trifluoromethanesulfonyl)imide and 1.5 g of ammonium persulfate thereto, and heat and stir for reaction at 80 °C for 2 h. After the reaction is completed, cool to room temperature to obtain solution B;

[0078] S4. With stirring, add 25 g of solution A to 100 g of solution B and mix evenly to obtain the anti-fog coating liquid.

[0079] Comparative Example 1

[0080] A method for preparing an anti-fog coating liquid includes the following steps:

[0081] S1. Ultrasonically disperse 12 g of nano-silica in 100 mL of deionized water to obtain solution A for standby;

[0082] S2. Add 30 g of N-vinylpyrrolidone to 250 mL of deionized water, stir to dissolve, then add 8 g of 1-vinyl-3-ethylimidazolium bis(trifluoromethanesulfonyl)imide and 1.5 g of ammonium persulfate thereto, and heat and stir for reaction at 60 °C for 5 h. After the reaction is completed, cool to room temperature to obtain solution B;

[0083] S3. With stirring, add 30 g of solution A to 100 g of solution B and mix evenly to obtain the anti-fog coating liquid.

[0084] Compared with Example 1, the nano-silica in Comparative Example 1 was not subjected to modification treatment.

[0085] Comparative Example 2

[0086] A method for preparing an anti-fog coating liquid includes the following steps:

[0087] S1. Ultrasonically disperse 10 g of nano-silica in 100 mL of 60 wt% ethanol aqueous solution, then add 1.5 g of vinyltriethoxysilane thereto, stir and react at room temperature for 2 h, and then add 6 g of acrylic acid and 0.8 g of initiator ammonium persulfate thereto, and heat and stir for reaction at 50 °C for 5 h. After the reaction is completed, perform centrifugation, washing, and freeze-drying to obtain modified nano-silica;

[0088] S2. Ultrasonically disperse 12 g of modified nano-silica in 100 mL of deionized water to obtain solution A for standby;

[0089] S3. Add 30 g of N-vinylpyrrolidone to 250 mL of deionized water, stir to dissolve, then add 8 g of 1-vinyl-3-ethylimidazolium bis(trifluoromethylsulfonyl)imide and 1.5 g of ammonium persulfate thereto, heat and stir the reaction at 60 °C for 5 h. After the reaction is completed, cool to room temperature to obtain Solution B;

[0090] S4. With stirring, add 30 g of Solution A to 100 g of Solution B and mix evenly to obtain the anti-fog coating liquid.

[0091] In Comparative Example 2 compared with Example 1, acrylic acid was used to replace sodium styrenesulfonate.

[0092] Comparative Example 3

[0093] A method for preparing an anti-fog coating liquid, comprising the following steps:

[0094] S1. Ultrasonically disperse 10 g of nano-silica in 100 mL of 60 wt% ethanol aqueous solution, then add 1.5 g of vinyltriethoxysilane thereto, stir and react at room temperature for 2 h, and then add 6 g of sodium styrenesulfonate and 0.8 g of initiator ammonium persulfate thereto, heat and stir the reaction at 50 °C for 5 h. After the reaction is completed, perform centrifugation, washing, and freeze-drying to obtain modified nano-silica;

[0095] S2. Ultrasonically disperse 12 g of modified nano-silica in 100 mL of deionized water to obtain Solution A for standby;

[0096] S3. Add 30 g of N-vinylpyrrolidone to 250 mL of deionized water, stir to dissolve, then add 1.5 g of ammonium persulfate thereto, heat and stir the reaction at 60 °C for 5 h. After the reaction is completed, cool to room temperature to obtain Solution B;

[0097] S4. With stirring, add 30 g of Solution A to 100 g of Solution B and mix evenly to obtain the anti-fog coating liquid.

[0098] In Comparative Example 3 compared with Example 1, 1-vinyl-3-ethylimidazolium bis(trifluoromethylsulfonyl)imide was not added.

[0099] Coat the anti-fog coating liquids prepared in Example 1 and Comparative Examples 1-3 respectively on a PC resin, dry in a vacuum drying oven, form an anti-fog coating on the surface of the PC resin substrate, the thickness of the anti-fog coating is 40 μm, and then perform performance tests:

[0100] Anti-fog performance test:

[0101] Humidification by humidifier: Place the PC resin coated with an anti-fog coating 10 cm above the humidifier, and conduct humidification treatment on the anti-fog coating on the PC resin under the conditions of 80% humidity and 27.5 °C temperature;

[0102] Humidification by boiling water: Place the PC resin coated with an anti-fog coating 10 cm above boiling water, and conduct humidification treatment on the anti-fog coating on the PC resin;

[0103] Under two different humidification environments, continuously humidify the PC resin coated with an anti-fog coating until the anti-fog coating on the PC resin loses its anti-fog effect. The results are as Figure 2 shown. As can be seen from Figure 2 this, in Comparative Example 1, the nano-silica was not modified, and in Comparative Example 2, acrylic acid was used to replace sodium styrene sulfonate in the present invention. Its anti-fog effect is significantly inferior to that of the examples of the present invention, indicating that the introduction of sodium styrene sulfonate polymer can significantly improve the anti-fog stability of the coating; in Comparative Example 3, 1-vinyl-3-ethylimidazolium bis(trifluoromethanesulfonyl)imide salt was not added, the bonding force between the anti-fog coating and the PC resin decreased, and the anti-fog coating was easily peeled off, resulting in a significant reduction in anti-fog performance.

[0104] This application also detected the light transmittance of the anti-fog coatings prepared in Example 1 and Comparative Example 2. As can be seen from Figure 3 this, the coating prepared by the present invention has a high light transmittance. In the visible light range, the light transmittance can reach 95%, which is about 2% higher than that of Comparative Example 2 for visible light transmittance.

[0105] Finally, it should be noted that the above embodiments do not limit the present invention in any form. For those skilled in the art, based on the present invention, some modifications and improvements can be made. Therefore, any modification or improvement made without departing from the spirit of the present invention falls within the scope of protection required by the present invention.

Claims

1. A laryngoscope blade with anti-fog function, the laryngoscope blade comprising a substrate and an anti-fog coating coated on the surface of the substrate, characterized in that: The method for preparing the anti-fog coating liquid used in the anti-fog coating comprises the following steps: S1, ultrasonically dispersing nano-silica in an ethanol aqueous solution, then adding vinyl triethoxysilane thereto, stirring for reaction, then adding sodium styrene sulfonate and an initiator thereto, heating and stirring for reaction, and after the reaction is completed, centrifuging, washing, and freeze-drying to obtain modified nano-silica; S2, ultrasonically dispersing the modified nano-silicon dioxide in deionized water to obtain solution A for later use; S3, adding N-vinyl pyrrolidone to deionized water, stirring to dissolve, then adding 1-vinyl-3-ethyl imidazole bis trifluoromethanesulfonyl imide salt and ammonium persulfate thereto, heating and stirring to react, after the reaction is completed, cooling to room temperature to obtain solution B; S4. Add solution A to solution B under stirring and mix well to obtain an anti-fog coating solution.

2. The laryngoscope blade according to claim 1, characterized in that: In step S1, the mass ratio of nano-silica, vinyl triethoxysilane, sodium styrene sulfonate and initiator is 8-12:1-2:4-8:0.5-1.

3. The laryngoscope blade according to claim 1, characterized in that: In step S1, the temperature of the heating and stirring reaction is 50-70° C., and the time of the heating and stirring reaction is 3-5 h.

4. The laryngoscope blade according to claim 1, characterized in that: In step S2, the mass ratio of modified nano-silicon dioxide to deionized water is 10-15:

100.

5. The laryngoscope blade according to claim 1, characterized in that: In step S3, the mass ratio of N-vinyl pyrrolidone, deionized water, 1-vinyl-3-ethylimidazole bistrifluoromethanesulfonyl imide salt and ammonium persulfate is 20-40:200-300:5-10:1-2.

6. The laryngoscope blade according to claim 1, characterized in that: In step S3, the temperature of the heating and stirring reaction is 60-80° C., and the time of the heating and stirring reaction is 2-5 h.

7. The laryngoscope blade according to claim 1, characterized in that: In step S4, the mass ratio of solution A to solution B is 20-40:

100.

8. The laryngoscope blade according to claim 1, characterized in that: The material of the substrate is selected from polyacrylic resin, polycarbonate resin, polymethyl methacrylate resin, polyethylene terephthalate resin, polybutylene terephthalate or polyimide resin.

9. The laryngoscope blade according to claim 1, characterized in that: The coating process is spraying, knife coating, spin coating or dipping.

10. The method for preparing a laryngoscope blade with anti-fog function according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: coating the anti-fog coating liquid on the surface of a substrate, drying, and forming an anti-fog coating on the surface of the substrate, thereby obtaining a laryngoscope blade with an anti-fog function.

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