Anti-glare multifunctional flexible film material and preparation method and application thereof

Abstract

This invention relates to the field of nanofiber membrane technology, and discloses an anti-glare multifunctional flexible thin film material, its preparation method, and its application. The preparation method of the anti-glare multifunctional flexible thin film material includes the following steps: selecting a spinnable polymer material with a refractive index matching that of the matrix resin; placing the spinnable polymer material in an organic solvent system to prepare spinnable polymer solutions of different concentrations as spinning precursor solutions; and using electrospinning technology to prepare an anti-glare multifunctional flexible thin film material. When the film is spun, it has high transparency and high haze, achieving the anti-glare function. At the same time, it increases the hydrophobic angle on one side of the fiber membrane, making the nanofiber membrane superhydrophobic. The final composite membrane has the characteristics of high transparency, high haze, self-adhesion, and superhydrophobicity.

Description

Technical Field

[0001] This invention relates to the field of nanofiber membrane technology, and in particular to an anti-glare multifunctional flexible thin film material, its preparation method, and its application. Background Technology

[0002] Vision is a crucial way for humans to acquire information from the outside world, and most information originates from it. Therefore, a good visual environment is essential for people to obtain effective information. However, inappropriate illuminance, uneven light distribution, and glare in the environment can all affect labor productivity and visual health to some extent, and in severe cases, can lead to eye diseases and endanger human health. Glare is caused by unsuitable brightness in the visual environment; the greater the contrast of the visual environment, the easier it is to produce glare. Glare is divided into direct glare and indirect glare in terms of its generation method, and into adaptive glare, uncomfortable glare, and disabling glare in terms of its visual impact. Common hazards of glare include: in road lighting, most urban buildings use LEDs as the light source. Due to the concentrated light source and the lack of an external reflector, the incident light is strong and bright, which is harmful to the eyes; in vehicle driving, high beams are bright and have a long illumination distance when driving at night, and are also affected by roadside lights and night scene lights, greatly reducing the visibility of targets on the road. Drivers cannot see clearly under strong glare, leading to visual fatigue and life-threatening situations. Current traditional anti-glare films have complex manufacturing processes, high costs, cannot simultaneously achieve high light transmittance and high haze, have poor film flexibility, lack superhydrophobicity, and are easily contaminated. Therefore, we have prepared a multifunctional flexible anti-glare film material with high light transmittance, high haze, and good anti-glare function, and endowed the composite nanofiber membrane with superhydrophobicity.

[0003] Therefore, developing a high-haze thin film material with high light transmittance to improve the effective transmission of light, reduce direct reflection and glare, can adhere to glass and lenses and not fall off for a long time, and has superhydrophobicity to achieve waterproof fogging and self-cleaning capabilities remains a huge challenge. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an anti-glare multifunctional flexible thin film material, its preparation method, and its application.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A method for preparing an anti-glare multifunctional flexible thin film material includes the following steps:

[0007] Step 1: Select a spinnable polymer material whose refractive index matches that of the matrix resin, and prepare spinnable polymer solutions of different concentrations in an organic solvent system as spinning precursor solutions.

[0008] Step 2: On the surface of the cleaned and dried aluminum foil, a layer of uncured resin with high light transmittance is uniformly coated as a receiving substrate. The spinning precursor solution obtained in Step 1 is electrospun and then cured to obtain a flexible film material.

[0009] Step 3: Place the inorganic particles in a fluorinated solvent system and sonicate and stir to disperse them evenly to obtain an air-spray solution. Use the air-spray method to evenly spray one side of the electrospun fiber membrane obtained in Step 2 to obtain an anti-glare multifunctional flexible film material.

[0010] Preferably, the spinnable polymer material is one or a mixture of several of polyvinyl butyral, polyvinylidene fluoride, and polyacrylonitrile; the concentration of the spinnable polymer material in the spinning precursor solution of step 1 is 10-25 wt%.

[0011] Preferably, the refractive index of polyvinyl butyral is 1.406, the refractive index of polyvinylidene fluoride is 1.42, and the refractive index of polyacrylonitrile is 1.51.

[0012] Preferably, the organic solvent system is one or a mixture of several of ethanol, acetone, dimethylformamide, dichloromethane, methanol, and ethyl acetate.

[0013] Preferably, the high-transmittance uncured resin is one or a mixture of several of polydimethylsiloxane, polymethyltrichlorosilane, and polydimethyldichlorosilane.

[0014] Preferably, the refractive index of polydimethylsiloxane is 1.406, the refractive index of polymethyltrichlorosilane is 1.411, and the refractive index of polydimethyldichlorosilane is 1.4023.

[0015] Preferably, the inorganic particles are one or a mixture of several of silicon dioxide, calcium silicate, and magnesium silicate.

[0016] Preferably, the fluorinated solvent system is one or a mixture of several of FAS-17, polytetrafluoroethylene, and polydimethylsiloxane.

[0017] Preferably, the spinnable polymer material is polyvinyl butyral, the high-transmittance uncured resin is polydimethylsiloxane, and the inorganic particles are silicon dioxide.

[0018] Preferably, in steps 2 and 3, the voltage for electrospinning is 12–20 kV; and the propulsion speed of the propulsion pump during electrospinning is 0.4–0.8 mL / h.

[0019] An anti-glare multifunctional flexible thin film material is prepared by the above-mentioned method for preparing an anti-glare multifunctional flexible thin film material.

[0020] Preferably, the fiber thickness of the anti-glare multifunctional flexible film material is 0.06-0.14 mm, the light transmittance of the nanofiber film is 94.04%-90.76%, and the haze is 94.27%-94.50%.

[0021] Preferably, the superhydrophobic coating side of the anti-glare multifunctional flexible film material exhibits a silver mirror effect in water, serving to prevent water fogging and provide self-cleaning.

[0022] The above-mentioned anti-glare multifunctional flexible film material has applications in road lighting, vehicle driving, and people's visual health.

[0023] The beneficial effects of this invention are as follows:

[0024] This invention provides a method for preparing an anti-glare multifunctional flexible thin film material. The material is prepared using electrospinning technology. Upon completion of the spinning process, the film exhibits high transparency and high haze because individual fibers are embedded in a high-transmittance resin with a similar refractive index under the influence of electrostatic force and gravity. Then, a hydrophobic inorganic material is sprayed onto the fiber membrane. The F17@SiO2 particles on the surface of the composite membrane generate a small amount of light scattering, resulting in a slight increase in haze, further enhancing the anti-glare function. Simultaneously, the hydrophobic angle on one side of the fiber membrane is increased, giving the nanofiber membrane superhydrophobicity. The resulting composite membrane possesses high transparency, high haze, self-adhesion, and superhydrophobicity. This anti-glare multifunctional flexible thin film material can provide new ideas for research and development in road lighting, vehicle driving, and human visual health, improving safety. Attached Figure Description

[0025] Figure 1 A schematic flowchart illustrating a method for preparing an anti-glare multifunctional flexible thin film material according to an embodiment of the present invention;

[0026] Figure 2 The graph shows the transparency changes of films prepared by electrospinning with different concentrations of P-PVB for 1 hour, films prepared by electrospinning with P-20wt% PVB for different times, and films prepared by electrospinning with different spinning substrates for 1 hour.

[0027] Figure 3 The haze variation diagrams are for films prepared by electrospinning with different concentrations of P-PVB for 1 hour, films prepared by electrospinning with P-20wt% PVB for different times, and films prepared by electrospinning with different spinning substrates for 1 hour according to the present invention.

[0028] Figure 4This is a graph showing the change in illuminance values ​​after laser penetration of blank, pure PDMS, P-PVB, and P-PVB / F17@SiO2 composite nanofiber membranes according to the present invention.

[0029] Figure 5 The diagram shows the variation of water contact angle for the pure PDMS, PVB, P-PVB, P-PVB / SiO2, and P-PVB / F17@SiO2 composite nanofiber membranes of this invention.

[0030] Figure 6 This is a graph showing the change in surface water contact angle of the film after six different treatments according to the present invention;

[0031] Figure 7 This is a diagram showing the self-adsorption of the P-PVB / F17@SiO2 composite nanofiber membrane of the present invention. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] Comparative Example 1

[0034] As attached Figure 1 As shown, this comparative example provides a method for preparing an anti-glare multifunctional flexible thin film material, which includes the following steps:

[0035] S1. Weigh a certain amount of polyvinyl butyral (PVB) powder into a reagent bottle, then add a certain amount of ethanol to the reagent bottle to prepare polyvinyl butyral solutions of different concentrations. Stir on a magnetic stirrer until completely dissolved.

[0036] S2. Coat the aluminum foil surface evenly with polydimethylsiloxane (PDMS), ensuring the upper surface is completely covered by PDMS. Electrospinning equipment is attached. Figure 1 As shown, the positive terminal of the high-voltage power supply was connected to the syringe needle, and the negative terminal was connected to the aluminum foil covering PDMS. Electrospinning parameters were then set. At a constant voltage of 15 kV and a spinning distance of 20 cm, the aforementioned spinning precursor solution was injected into a 5 mL plastic syringe, with the pump speed at 0.6 mL / h. The relative humidity was controlled at 40 ± 5%. After electrospinning for a certain period, the electrospun membrane carrying the aluminum foil was placed in an oven to cure and remove the aluminum foil, yielding a nanofiber membrane with a thickness of 0.1 ± 0.04 mm.

[0037] Comparative Example 2

[0038] As attached Figure 1 As shown, this comparative example provides a method for preparing an anti-glare multifunctional flexible thin film material, which includes the following steps:

[0039] S1. Weigh a certain amount of polyvinyl butyral (PVB) powder into a reagent bottle, then add a certain amount of ethanol to the reagent bottle to prepare polyvinyl butyral solutions of different concentrations. Stir on a magnetic stirrer until completely dissolved.

[0040] S2. Coat the aluminum foil surface evenly with polydimethylsiloxane (PDMS), ensuring the upper surface is completely covered by PDMS. Electrospinning equipment is attached. Figure 1 As shown, the positive terminal of the high-voltage power supply was connected to the syringe needle, and the negative terminal was connected to the aluminum foil covering PDMS. Electrospinning parameters were then set. At a constant voltage of 15 kV and a spinning distance of 20 cm, the aforementioned spinning precursor solution was injected into a 5 mL plastic syringe, with the pump speed at 0.6 mL / h. The relative humidity was controlled at 40 ± 5%. After electrospinning for a certain period, the electrospun membrane carrying the aluminum foil was placed in an oven to cure and remove the aluminum foil, yielding a nanofiber membrane with a thickness of 0.1 ± 0.04 mm.

[0041] S3, air jet equipment as attached Figure 1 As shown, a certain amount of silica particles were weighed into a reagent bottle, and then a certain amount of ethanol, deionized water, and FAS-17 were added to the reagent bottle. After ultrasonication in an ultrasonic oscillator for a certain time, an aerosol solution was obtained. The aerosol solution was injected into a 5 mL syringe, fixed on a micro-injection pump, and the P-PVB film was placed on the receiving substrate. Then, the injection pump parameters were set as follows: the micro-injection pump's advance speed was set to 5 mL / h, the air pump pressure was 50 kPa, the distance between the film and the nozzle was 20 cm, the ambient temperature during aerosol injection was 15 ± 2 °C, and the relative humidity was 40 ± 5%. After 10 min, the sample was placed in an oven and dried to obtain a superhydrophobic composite film.

[0042] Example 1

[0043] As attached Figure 1 As shown, this embodiment provides a method for preparing an anti-glare multifunctional flexible thin film material, which includes the following steps:

[0044] S1. Weigh a certain amount of polyvinyl butyral (PVB) powder into a reagent bottle, then add a certain amount of ethanol to the reagent bottle to prepare a 10wt% polyvinyl butyral solution. Stir the solution on a magnetic stirrer until it is completely dissolved.

[0045] S2. Coat the aluminum foil surface evenly with polydimethylsiloxane (PDMS), ensuring the upper surface is completely covered by PDMS. Electrospinning equipment is attached. Figure 1As shown, the positive terminal of the high-voltage power supply was connected to the syringe needle, and the negative terminal was connected to the aluminum foil covering PDMS. Electrospinning parameters were then set: a constant voltage of 15 kV and a spinning distance of 20 cm were used. The aforementioned spinning precursor solution was injected into a 5 mL plastic syringe, and the feed pump's speed was 0.6 mL / h. The relative humidity was controlled at 40 ± 5%. The power was turned on, and spinning was carried out for 1 hour. The electrospun membrane carrying the aluminum foil was then placed in an oven to cure and remove the aluminum foil, yielding a nanofiber membrane with a thickness of 0.1 ± 0.04 mm.

[0046] Example 2

[0047] As attached Figure 1 As shown, this embodiment provides a method for preparing an anti-glare multifunctional flexible thin film material, which includes the following steps:

[0048] S1. Weigh a certain amount of polyvinyl butyral (PVB) powder into a reagent bottle, then add a certain amount of ethanol to the reagent bottle to prepare a 15wt% polyvinyl butyral solution. Stir the solution on a magnetic stirrer until it is completely dissolved.

[0049] S2. Coat the aluminum foil surface evenly with polydimethylsiloxane (PDMS), ensuring the upper surface is completely covered by PDMS. Electrospinning equipment is attached. Figure 1 As shown, the positive terminal of the high-voltage power supply was connected to the syringe needle, and the negative terminal was connected to the aluminum foil covering PDMS. Electrospinning parameters were then set: a constant voltage of 15 kV and a spinning distance of 20 cm were used. The aforementioned spinning precursor solution was injected into a 5 mL plastic syringe, and the feed pump's speed was 0.6 mL / h. The relative humidity was controlled at 40 ± 5%. The power was turned on, and spinning was carried out for 1 hour. The electrospun membrane carrying the aluminum foil was then placed in an oven to cure and remove the aluminum foil, yielding a nanofiber membrane with a thickness of 0.1 ± 0.04 mm.

[0050] Example 3

[0051] As attached Figure 1 As shown, this embodiment provides a method for preparing an anti-glare multifunctional flexible thin film material, which includes the following steps:

[0052] S1. Weigh a certain amount of polyvinyl butyral (PVB) powder into a reagent bottle, then add a certain amount of ethanol to the reagent bottle to prepare a 20wt% polyvinyl butyral solution. Stir the solution on a magnetic stirrer until it is completely dissolved.

[0053] S2. Coat the aluminum foil surface evenly with polydimethylsiloxane (PDMS), ensuring the upper surface is completely covered by PDMS. Electrospinning equipment is attached. Figure 1As shown, the positive terminal of the high-voltage power supply was connected to the syringe needle, and the negative terminal was connected to the aluminum foil covering PDMS. Electrospinning parameters were then set: a constant voltage of 15 kV and a spinning distance of 20 cm were used. The aforementioned spinning precursor solution was injected into a 5 mL plastic syringe, and the feed pump's speed was 0.6 mL / h. The relative humidity was controlled at 40 ± 5%. The power was turned on, and spinning was carried out for 1 hour. The electrospun membrane carrying the aluminum foil was then placed in an oven to cure and remove the aluminum foil, yielding a nanofiber membrane with a thickness of 0.1 ± 0.04 mm.

[0054] Example 4

[0055] As attached Figure 1 As shown, this embodiment provides a method for preparing an anti-glare multifunctional flexible thin film material, which includes the following steps:

[0056] S1. Weigh a certain amount of polyvinyl butyral (PVB) powder into a reagent bottle, then add a certain amount of ethanol to the reagent bottle to prepare a 25wt% polyvinyl butyral solution. Stir the solution on a magnetic stirrer until it is completely dissolved.

[0057] S2. Coat the aluminum foil surface evenly with polydimethylsiloxane (PDMS), ensuring the upper surface is completely covered by PDMS. Electrospinning equipment is attached. Figure 1 As shown, the positive terminal of the high-voltage power supply was connected to the syringe needle, and the negative terminal was connected to the aluminum foil covering PDMS. Electrospinning parameters were then set: a constant voltage of 15 kV and a spinning distance of 20 cm were used. The aforementioned spinning precursor solution was injected into a 5 mL plastic syringe, and the feed pump's speed was 0.6 mL / h. The relative humidity was controlled at 40 ± 5%. The power was turned on, and spinning was carried out for 1 hour. The electrospun membrane carrying the aluminum foil was then placed in an oven to cure and remove the aluminum foil, yielding a nanofiber membrane with a thickness of 0.1 ± 0.04 mm.

[0058] Example 5

[0059] As attached Figure 1 As shown, this embodiment provides a method for preparing an anti-glare multifunctional flexible thin film material, which includes the following steps:

[0060] S1. Weigh a certain amount of polyvinyl butyral (PVB) powder into a reagent bottle, then add a certain amount of ethanol to the reagent bottle to prepare a 20wt% polyvinyl butyral solution. Stir the solution on a magnetic stirrer until it is completely dissolved.

[0061] S2. Coat the aluminum foil surface evenly with polydimethylsiloxane (PDMS), ensuring the upper surface is completely covered by PDMS. Electrospinning equipment is attached. Figure 1As shown, the positive terminal of the high-voltage power supply was connected to the syringe needle, and the negative terminal was connected to the aluminum foil covering PDMS. Electrospinning parameters were then set. At a constant voltage of 15 kV and a spinning distance of 20 cm, the aforementioned spinning precursor solution was injected into a 5 mL plastic syringe, with the feed pump operating at a speed of 0.6 mL / h. The relative humidity was controlled at 40 ± 5%. The power was turned on, and spinning was carried out for 30 minutes. The electrospun membrane carrying the aluminum foil was then placed in an oven to cure and remove the aluminum foil, yielding a nanofiber membrane with a thickness of 0.1 ± 0.04 mm.

[0062] Example 6

[0063] As attached Figure 1 As shown, this embodiment provides a method for preparing an anti-glare multifunctional flexible thin film material, which includes the following steps:

[0064] S1. Weigh a certain amount of polyvinyl butyral (PVB) powder into a reagent bottle, then add a certain amount of ethanol to the reagent bottle to prepare a 20wt% polyvinyl butyral solution. Stir the solution on a magnetic stirrer until it is completely dissolved.

[0065] S2. Coat the aluminum foil surface evenly with polydimethylsiloxane (PDMS), ensuring the upper surface is completely covered by PDMS. Electrospinning equipment is attached. Figure 1 As shown, the positive terminal of the high-voltage power supply was connected to the syringe needle, and the negative terminal was connected to the aluminum foil covering PDMS. Electrospinning parameters were then set. At a constant voltage of 15 kV and a spinning distance of 20 cm, the aforementioned spinning precursor solution was injected into a 5 mL plastic syringe, with the feed pump operating at a speed of 0.6 mL / h. The relative humidity was controlled at 40 ± 5%. The power was turned on, and spinning was carried out for 45 minutes. The electrospun membrane carrying the aluminum foil was then placed in an oven for curing and removal of the aluminum foil, yielding a nanofiber membrane with a thickness of 0.1 ± 0.04 mm.

[0066] Example 7

[0067] As attached Figure 1 As shown, this embodiment provides a method for preparing an anti-glare multifunctional flexible thin film material, which includes the following steps:

[0068] S1. Weigh a certain amount of polyvinyl butyral (PVB) powder into a reagent bottle, then add a certain amount of ethanol to the reagent bottle to prepare a 20wt% polyvinyl butyral solution. Stir the solution on a magnetic stirrer until it is completely dissolved.

[0069] S2. Coat the aluminum foil surface evenly with polydimethylsiloxane (PDMS), ensuring the upper surface is completely covered by PDMS. Electrospinning equipment is attached. Figure 1As shown, the positive terminal of the high-voltage power supply was connected to the syringe needle, and the negative terminal was connected to the aluminum foil covering PDMS. Electrospinning parameters were then set: a constant voltage of 15 kV and a spinning distance of 20 cm were used. The aforementioned spinning precursor solution was injected into a 5 mL plastic syringe, and the feed pump was used at a speed of 0.6 mL / h. The relative humidity was controlled at 40 ± 5%. The power was turned on, and spinning was carried out for 60 minutes. The electrospun membrane carrying the aluminum foil was then placed in an oven to cure and remove the aluminum foil, yielding a nanofiber membrane with a thickness of 0.1 ± 0.04 mm.

[0070] Example 8

[0071] As attached Figure 1 As shown, this embodiment provides a method for preparing an anti-glare multifunctional flexible thin film material, which includes the following steps:

[0072] S1. Weigh a certain amount of polyvinyl butyral (PVB) powder into a reagent bottle, then add a certain amount of ethanol to the reagent bottle to prepare a 20wt% polyvinyl butyral solution. Stir the solution on a magnetic stirrer until it is completely dissolved.

[0073] S2. Coat the aluminum foil surface evenly with polydimethylsiloxane (PDMS), ensuring the upper surface is completely covered by PDMS. Electrospinning equipment is attached. Figure 1 As shown, the positive terminal of the high-voltage power supply was connected to the syringe needle, and the negative terminal was connected to the aluminum foil covering PDMS. Electrospinning parameters were then set. At a constant voltage of 15 kV and a spinning distance of 20 cm, the aforementioned spinning precursor solution was injected into a 5 mL plastic syringe, with the feed pump operating at a speed of 0.6 mL / h. The relative humidity was controlled at 40 ± 5%. The power was turned on, and spinning was carried out for 75 minutes. The electrospun membrane carrying the aluminum foil was then placed in an oven for curing and removal of the aluminum foil, yielding a nanofiber membrane with a thickness of 0.1 ± 0.04 mm.

[0074] Example 9

[0075] As attached Figure 1 As shown, this embodiment provides a method for preparing an anti-glare multifunctional flexible thin film material, which includes the following steps:

[0076] S1. Weigh a certain amount of polyvinyl butyral (PVB) powder into a reagent bottle, then add a certain amount of ethanol to the reagent bottle to prepare a 20wt% polyvinyl butyral solution. Stir the solution on a magnetic stirrer until it is completely dissolved.

[0077] S2. Coat the aluminum foil surface evenly with polydimethylsiloxane (PDMS), ensuring the upper surface is completely covered by PDMS. Electrospinning equipment is attached. Figure 1As shown, the positive terminal of the high-voltage power supply was connected to the syringe needle, and the negative terminal was connected to the aluminum foil covering PDMS. Electrospinning parameters were then set: a constant voltage of 15 kV and a spinning distance of 20 cm were used. The aforementioned spinning precursor solution was injected into a 5 mL plastic syringe, and the feed pump was used at a speed of 0.6 mL / h. The relative humidity was controlled at 40 ± 5%. The power was turned on, and spinning was carried out for 90 minutes. The electrospun membrane carrying the aluminum foil was placed in an oven for curing and removal of the aluminum foil, yielding a nanofiber membrane with a thickness of 0.1 ± 0.04 mm.

[0078] Example 10

[0079] As attached Figure 1 As shown, this embodiment provides a method for preparing an anti-glare multifunctional flexible thin film material, which includes the following steps:

[0080] S1. Weigh a certain amount of gelatin powder into a reagent bottle, then add a certain amount of ethanol to the reagent bottle to prepare a gelatin solution with a concentration of 20wt%, and stir on a magnetic stirrer until completely dissolved.

[0081] S2. Coat the aluminum foil surface evenly with polydimethylsiloxane (PDMS), ensuring the upper surface is completely covered by PDMS. Electrospinning equipment is attached. Figure 1 As shown, the positive terminal of the high-voltage power supply was connected to the syringe needle, and the negative terminal was connected to the aluminum foil covering PDMS. Electrospinning parameters were then set: a constant voltage of 15 kV and a spinning distance of 20 cm were used. The aforementioned spinning precursor solution was injected into a 5 mL plastic syringe, and the feed pump's speed was 0.6 mL / h. The relative humidity was controlled at 40 ± 5%. The power was turned on, and spinning was carried out for 1 hour. The electrospun membrane carrying the aluminum foil was then placed in an oven to cure and remove the aluminum foil, yielding a nanofiber membrane with a thickness of 0.1 ± 0.04 mm.

[0082] Example 11

[0083] As attached Figure 1 As shown, this embodiment provides a method for preparing an anti-glare multifunctional flexible thin film material, which includes the following steps:

[0084] S1. Weigh a certain amount of polyvinylidene fluoride (PVDF) powder into a reagent bottle, then add a certain amount of ethanol to the reagent bottle to prepare a 20wt% polyvinylidene fluoride solution. Stir the solution on a magnetic stirrer until it is completely dissolved.

[0085] S2. Coat the aluminum foil surface evenly with polydimethylsiloxane (PDMS), ensuring the upper surface is completely covered by PDMS. Electrospinning equipment is attached. Figure 1As shown, the positive terminal of the high-voltage power supply was connected to the syringe needle, and the negative terminal was connected to the aluminum foil covering PDMS. Electrospinning parameters were then set: a constant voltage of 15 kV and a spinning distance of 20 cm were used. The aforementioned spinning precursor solution was injected into a 5 mL plastic syringe, and the feed pump's speed was 0.6 mL / h. The relative humidity was controlled at 40 ± 5%. The power was turned on, and spinning was carried out for 1 hour. The electrospun membrane carrying the aluminum foil was then placed in an oven to cure and remove the aluminum foil, yielding a nanofiber membrane with a thickness of 0.1 ± 0.04 mm.

[0086] Example 12

[0087] As attached Figure 1 As shown, this embodiment provides a method for preparing an anti-glare multifunctional flexible thin film material, which includes the following steps:

[0088] S1. Weigh a certain amount of polyacrylonitrile (PAN) powder into a reagent bottle, then add a certain amount of ethanol to the reagent bottle to prepare a 20wt% polyacrylonitrile solution. Stir the solution on a magnetic stirrer until it is completely dissolved.

[0089] S2. Coat the aluminum foil surface evenly with polydimethylsiloxane (PDMS), ensuring the upper surface is completely covered by PDMS. Electrospinning equipment is attached. Figure 1 As shown, the positive terminal of the high-voltage power supply was connected to the syringe needle, and the negative terminal was connected to the aluminum foil covering PDMS. Electrospinning parameters were then set: a constant voltage of 15 kV and a spinning distance of 20 cm were used. The aforementioned spinning precursor solution was injected into a 5 mL plastic syringe, and the feed pump's speed was 0.6 mL / h. The relative humidity was controlled at 40 ± 5%. The power was turned on, and spinning was carried out for 1 hour. The electrospun membrane carrying the aluminum foil was then placed in an oven to cure and remove the aluminum foil, yielding a nanofiber membrane with a thickness of 0.1 ± 0.04 mm.

[0090] Example 13

[0091] As attached Figure 1 As shown, this embodiment provides a method for preparing an anti-glare multifunctional flexible thin film material, which includes the following steps:

[0092] S1. Coat the aluminum foil surface evenly with polydimethylsiloxane (PDMS) so that the upper surface is completely covered by PDMS, place it in an oven, cure and remove the aluminum foil.

[0093] Example 14

[0094] As attached Figure 1 As shown, this embodiment provides a method for preparing an anti-glare multifunctional flexible thin film material, which includes the following steps:

[0095] S1. Weigh a certain amount of polyvinyl butyral (PVB) powder into a reagent bottle, then add a certain amount of ethanol to the reagent bottle to prepare a 20wt% polyvinyl butyral solution. Stir the solution on a magnetic stirrer until it is completely dissolved.

[0096] S2. Coat the aluminum foil surface evenly with polydimethylsiloxane (PDMS), ensuring the upper surface is completely covered by PDMS. Electrospinning equipment is attached. Figure 1 As shown, the positive terminal of the high-voltage power supply was connected to the syringe needle, and the negative terminal was connected to the aluminum foil covering PDMS. Electrospinning parameters were then set: a constant voltage of 15 kV and a spinning distance of 20 cm were used. The aforementioned spinning precursor solution was injected into a 5 mL plastic syringe, and the feed pump's speed was 0.6 mL / h. The relative humidity was controlled at 40 ± 5%. The power was turned on, and spinning was carried out for 1 hour. The electrospun membrane carrying the aluminum foil was then placed in an oven to cure and remove the aluminum foil, yielding a nanofiber membrane with a thickness of 0.1 ± 0.04 mm.

[0097] S3, air jet equipment as attached Figure 1 As shown, a certain amount of silica particles were weighed into a reagent bottle, and then a certain amount of ethanol, deionized water, and FAS-17 were added to the reagent bottle. After ultrasonication in an ultrasonic oscillator for a certain time, an aerosol solution was obtained. The aerosol solution was injected into a 5 mL syringe, fixed on a micro-injection pump, and the P-PVB film was placed on the receiving substrate. Then, the injection pump parameters were set as follows: the micro-injection pump's advance speed was set to 5 mL / h, the air pump pressure was 50 kPa, the distance between the film and the nozzle was 20 cm, the ambient temperature during aerosol injection was 15 ± 2 °C, and the relative humidity was 40 ± 5%. After 10 min, the sample was placed in an oven and dried to obtain a composite nanofiber membrane.

[0098] In the above embodiments, a composite anti-glare multifunctional flexible film material of polyvinyl butyral (PVB), polydimethylsiloxane (PDMS), and F17@SiO2 was prepared using electrospinning and air-jet methods. PVB possesses excellent transparency, good flexibility, and high impact strength. PDMS exhibits high transparency, good chemical stability, and high shear strength. F17@SiO2 possesses superhydrophobicity, endowing the fiber membrane with excellent waterproof performance. Using PDMS as the receiving substrate, a single PVB fiber is embedded in uncured PDMS with a similar refractive index, resulting in a fiber membrane with high light transmittance and high haze. Due to the adhesiveness of PDMS, fiber movement is hindered, leading to large pores in the mesh fiber structure and multi-level scattering of incident light, thus increasing haze. Fluorinated silica is sprayed onto one side of the fiber membrane to improve the hydrophobic angle of the composite fiber membrane, giving it self-cleaning properties. When exposed to direct external light, the high transmittance and high haze of the composite nanofiber membrane cause multi-level scattering of light during propagation, achieving an anti-glare function. This invention provides a method for preparing an anti-glare superhydrophobic composite nanofiber membrane, which has promising applications in road lighting, vehicle operation, and human visual health.

[0099] Experimental example:

[0100] I. The transparency changes of the anti-glare multifunctional flexible film materials (a) P-10wt% PVB, (b) P-15wt% PVB, (c) P-20wt% PVB, and (d) P-25wt% PVB prepared in Comparative Example 1 and Examples 1-4 are shown in the attached figure. Figure 2 As shown, due to the beaded structure of the P-10wt% PVB fiber membrane, the average transmittance of visible light is the lowest. As the solution concentration gradually increases, the beaded structure disappears and the transmittance increases. At the P-20wt% PVB concentration, the transmittance reaches the highest value of 94.04%. When the PVB concentration is further increased, the fibers become thicker, which increases the light reflectivity and the degree of backscattering, resulting in a decrease in transmittance.

[0101] II. The transparency changes of the anti-glare multifunctional flexible film materials prepared in Comparative Examples 1 and Examples 5-9 (a) 20wt% PVB-30min, (b) 20wt% PVB-45min, (c) 20wt% PVB-60min, (d) 20wt% PVB-75min, and (e) 20wt% PVB-90min are shown in the attached figure. Figure 2 As shown, with prolonged spinning time, the fiber membrane thickness increases, light reflectivity increases, and therefore light transmittance decreases.

[0102] III. The transparency changes of the (a) P-PVB, (b) P-Gel, (c) P-PVDF, (d) P-PAN, and (e) Pure PDMS anti-glare multifunctional flexible film materials prepared in Comparative Example 1, Examples 7, 10-13 are shown in the attached figure. Figure 2 As shown, in the visible light range of 400-800nm, the average transmittance of each substrate film is similar, all above 90%, with pure PDMS having an average transmittance as high as 97.12%, and the average transmittance of P-PVB nanofiber film also being higher than that of other substrates.

[0103] IV. The haze changes of the anti-glare multifunctional flexible thin film materials (a) P-10wt% PVB, (b) P-15wt% PVB, (c) P-20wt% PVB, and (d) P-25wt% PVB prepared in Comparative Example 1 and Examples 1-4 are shown in the attached figure. Figure 3 As shown, the P-10wt% PVB fiber membrane exhibits a beaded structure. As the solution concentration gradually increases, the beaded structure disappears, the fiber diameter increases, and the membrane thickness increases, leading to increased light reflectivity and backscattering, which in turn increases haze.

[0104] V. The haze changes of the anti-glare multifunctional flexible film materials prepared in Comparative Examples 1 and Examples 5-9 (a) 20wt% PVB-30min, (b) 20wt% PVB-45min, (c) 20wt% PVB-60min, (d) 20wt% PVB-75min, and (e) 20wt% PVB-90min are shown in the attached figure. Figure 3 As shown, with prolonged spinning time, the fiber membrane thickness increases, leading to increased light scattering and haze.

[0105] VI. The haze changes of the (a) P-PVB, (b) P-Gel, (c) P-PVDF, (d) P-PAN, and (e) Pure PDMS anti-glare multifunctional flexible thin film materials prepared in Comparative Example 1, Examples 7, 10-13 are shown in the attached figure. Figure 3 As shown, the closer the refractive indices of the two materials are, the less light scattering occurs, and the lower the haze. PVB and PDMS have the largest RI difference (0.082), therefore P-PVB nanofiber membranes have the highest haze. PAN fibers have a smaller diameter than the visible light range, resulting in less light scattering and lower haze.

[0106] VII. The changes in illuminance values ​​after laser penetration of blank, pure PDMS, P-PVB, and P-PVB / F17@SiO2 composite nanofiber films prepared in Comparative Examples 1-2 and Examples 7 and 14 are shown in the appendix. Figure 4As shown, the illuminance is highest in the blank state. After passing through the P-PVB and P-PVB / F17@SiO2 films, the illuminance decreases linearly. The F17@SiO2 particles on the surface of the composite film produce a small amount of light scattering, and the haze increases slightly, indicating that the prepared nanofiber composite film has anti-glare function.

[0107] 8. The changes in water contact angle of the pure PDMS, PVB, P-PVB, P-PVB / SiO2, and P-PVB / F17@SiO2 composite nanofiber membranes prepared in Comparative Examples 1-2 and Examples 7 and 14 are shown in the attached figure. Figure 5 As shown, after the fiber membrane was fluorinated with F17@SiO2, the hydrophobic angle increased from 154.1° to 170.3°.

[0108] IX. The surface water contact angle changes of the P-PVB / F17@SiO2 composite nanofiber membranes prepared in Comparative Examples 1-2 and Examples 7 and 14 after being treated in six different ways are shown in the attached figure. Figure 6 As shown, after being treated with acid and alkali, high temperature heating, mechanical and other physical and chemical means, it still has a hydrophobic angle greater than 150° and has good hydrophobic angle stability.

[0109] 10. The self-adsorption properties of the P-PVB / F17@SiO2 composite nanofiber membranes prepared in Comparative Examples 1-2 and Examples 7 and 14 are as shown in the attached figure. Figure 7 As shown, when the non-hydrophobic side of the P-PVB / F17@SiO2 composite nanofiber membrane was brought into contact with glass and resin lenses, it was found that the composite nanofilm self-adheded to the surface of the object and did not fall off for a long time, exhibiting self-adhesion.

[0110] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for preparing an anti-glare multifunctional flexible thin film material, characterized in that, Includes the following steps: Step 1: Select one or more of polyvinyl butyral, polyvinylidene fluoride, and polyacrylonitrile as the spinnable polymer material, and prepare spinnable polymer solutions of different concentrations in an organic solvent system as spinning precursor solutions. Step 2: On the surface of the cleaned and dried aluminum foil, a layer of uncured resin with high light transmittance is uniformly coated as a receiving substrate. The spinning precursor solution obtained in Step 1 is electrospun and then cured to obtain a flexible film material. Step 3: Place the inorganic particles in a fluorinated solvent system and sonicate and stir to disperse them evenly to obtain an air-spray solution. Use the air-spray method to uniformly spray one side of the electrospun fiber membrane obtained in Step 2 to obtain an anti-glare multifunctional flexible film material.

2. The method for preparing an anti-glare multifunctional flexible thin film material according to claim 1, characterized in that, In the spinning precursor solution of step 1, the concentration of the spinnable polymer material is 10~25 wt%.

3. The method for preparing an anti-glare multifunctional flexible thin film material according to claim 1, characterized in that, The organic solvent system is one or a mixture of several of the following: ethanol, acetone, dimethylformamide, dichloromethane, methanol, and ethyl acetate.

4. The method for preparing an anti-glare multifunctional flexible thin film material according to claim 1, characterized in that, The high-transmittance uncured resin is one or a mixture of several of polydimethylsiloxane, polymethyltrichlorosilane, and polydimethyldichlorosilane.

5. The method for preparing an anti-glare multifunctional flexible thin film material according to claim 1, characterized in that, The inorganic particles are one or a mixture of several of silicon dioxide, calcium silicate, and magnesium silicate.

6. The method for preparing an anti-glare multifunctional flexible thin film material according to claim 1, characterized in that, The fluorinated solvent system is one or a mixture of several of FAS-17, polytetrafluoroethylene, and polydimethylsiloxane.

7. The method for preparing an anti-glare multifunctional flexible thin film material according to claim 1, characterized in that, The spinnable polymer material is polyvinyl butyral, the high-transmittance uncured resin is polydimethylsiloxane, and the inorganic particles are silicon dioxide.

8. The method for preparing an anti-glare multifunctional flexible thin film material according to claim 1, characterized in that, In steps 2 and 3, the voltage for electrospinning is 12~20 kV; during electrospinning, the propulsion speed of the feed pump is 0.4~0.8 mL / h.

9. A multifunctional flexible thin film material with anti-glare properties, characterized in that, It is prepared by the preparation method of the anti-glare multifunctional flexible thin film material according to any one of claims 1-8.

10. The application of the anti-glare multifunctional flexible film material as described in claim 9 in the fields of road lighting, vehicle driving, and people's visual health.

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