High-barrier flexible optically conductive film and preparation method thereof

Abstract

The application relates to the technical field of flexible electronic devices, and particularly discloses a high-barrier flexible optical conductive film and a preparation method thereof, which comprises a flexible polymer substrate, an interface modification layer, a composite barrier layer, a conductive layer and a wear-resistant coating layer; the application is from three aspects, one is that modified acrylate solution is added in the preparation of the composite barrier layer, the modified acrylate solution is prepared by mixing trimethylolpropane triacrylate, polyurethane acrylate and KH-560 at a specific ratio, two is that modified conductive liquid is added in the preparation of the conductive layer, the modified conductive liquid is prepared by mixing PEDOT:PSS, 1-hydroxyethyl-3-methyl imidazole bis(trifluoromethane sulfonate) imidazole salt, polyvinyl alcohol and modified monomers at a specific ratio; and three is that functional acid ester is added in the wear-resistant coating liquid; through the synergistic effect of the above-mentioned substances, the mechanical property, the water vapor barrier property and the conductive property of the high-barrier flexible optical conductive film are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of flexible electronic device technology, and more specifically, to a high-barrier flexible optical conductive film and its preparation method. Background Technology

[0002] High-barrier flexible optical conductive films have wide applications in optoelectronic thin film devices such as solar cells, flat panel displays, transparent electrodes, and gas sensors due to their high water and oxygen barrier properties, low resistance, and ultra-flexibility.

[0003] In the existing technology, indium tin oxide (ITO) is often used as a photoelectric medium in the preparation of flexible optical conductive films with high barrier properties. However, the indium element in ITO is extremely limited in nature and is highly toxic, resulting in high preparation costs. At the same time, its physical properties differ greatly from those of organic PET substrates. The hard and brittle ITO layer cannot deform in coordination with the flexible polymer substrate. When the strain exceeds its fracture limit, penetrating cracks will be generated, leading to the interruption of the conductive path and a surge in resistance. In addition, in the existing technology, the barrier layer on the flexible polymer substrate is prone to pinholes and cracks due to microscopic particles or defects on the substrate surface, resulting in a reduction in water vapor barrier performance.

[0004] Based on the above statements, it is particularly important to develop a high-barrier flexible optical conductive film with good mechanical properties, excellent electrical conductivity, and good water vapor barrier properties. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a high-barrier flexible optical conductive film and its preparation method.

[0006] A high-barrier flexible optical conductive film comprises, from bottom to top, a flexible polymer substrate, an interface modification layer, a composite barrier layer, a conductive layer, and a wear-resistant coating. The flexible polymer substrate is a PET substrate; the raw material for preparing the interface modification layer is a modification liquid; the raw material for preparing the conductive layer is a modified conductive liquid; the raw material for preparing the wear-resistant coating is a wear-resistant coating liquid; the composite barrier layer is prepared by first depositing zinc oxide on the surface of the interface modification layer by atomic layer deposition to obtain a zinc oxide layer, and then coating the surface of the zinc oxide layer with a modified acrylate solution and performing a thermosetting treatment.

[0007] A method for preparing a high-barrier flexible optical conductive film includes the following steps: Step S1: Clean the flexible polymer substrate, dry it, and then treat it with plasma to obtain a pretreated flexible polymer substrate. Step S2: Coat the modified liquid onto the surface of the pretreated flexible polymer substrate to obtain an interface modified layer; Step S3: Deposit zinc oxide on the surface of the interface modified layer using atomic layer deposition to obtain a zinc oxide layer. Coat the surface of the zinc oxide layer with a modified acrylate solution and then perform a thermosetting treatment to obtain a composite barrier layer. Step S4: Spin-coat the modified conductive liquid onto the surface of the composite barrier layer, and then perform heat preservation treatment to obtain the conductive layer; Step S5: Apply the wear-resistant coating liquid to the surface of the conductive layer, cure it with ultraviolet light to obtain the wear-resistant coating, and after cutting, obtain a high-barrier flexible optical conductive film.

[0008] Furthermore, the specific process parameters for the plasma treatment are: power of 80-100W, oxygen flow rate of 15-20sccm, pressure of 50-100Pa, and treatment time of 2-5min.

[0009] Furthermore, the atomic layer deposition method specifically involves using diethylzinc as a metal precursor and deionized water as an oxygen source, with the two being alternately pulsed into the reaction chamber, followed by nitrogen purging after each pulse.

[0010] Furthermore, the specific process parameters of the atomic layer deposition method are as follows: DEZ pulse time is 0.1-0.3s, H2O pulse time is 0.1-0.3s, DEZ post-purge time is 4-6s, H2O post-purge time is 4-6s, deposition temperature is 80-120℃, carrier gas is nitrogen or argon, carrier gas flow rate is 50-100sccm, gas purge flow rate is 100-300sccm, deposition rate per cycle is 0.18-0.22nm / cycle, and the number of cycles is 75-125.

[0011] Furthermore, the thickness of the zinc oxide layer is 15-25 nm.

[0012] Furthermore, the thermosetting treatment specifically involves heating to 200-220°C at a rate of 2-4°C / min under a nitrogen protective atmosphere, and then performing the thermosetting treatment for 10-20 minutes.

[0013] Furthermore, the specific parameters of the spin coating process are: spin coating speed of 1500-2200 rpm and spin coating time of 40-60 s.

[0014] Furthermore, the specific process parameters for the heat preservation treatment are as follows: the atmosphere is nitrogen, the temperature is increased to 60°C at a heating rate of 2-4°C / min, the heat curing treatment is carried out for 20-40 minutes, and then the temperature is increased to 85-95°C at a heating rate of 5°C / min, and the heat preservation time is 50-80 minutes.

[0015] Furthermore, the thickness of the conductive layer is 10-30 nm.

[0016] Furthermore, the specific process parameters for the ultraviolet curing treatment are: ultraviolet wavelength of 365nm, light intensity of 600-800mW / cm², and curing time of 6-10s.

[0017] Furthermore, the modified liquid is prepared by the following steps: Add KH-560 to an ethanol-water solution and stir until homogeneous. Then add isobornyl acrylate and continue stirring for 12-16 minutes to obtain the modified solution.

[0018] Furthermore, the mass ratio of KH-560, aqueous ethanol solution, and isoborneol acrylate is 1-1.6:100-120:4.6-5.

[0019] Furthermore, the mass fraction of the ethanol aqueous solution is 60-64%.

[0020] Further, the modified acrylate solution is prepared by the following steps: Polyurethane acrylate and trimethylolpropane triacrylate are mixed and stirred evenly. Then, 2,6-di-tert-butyl-p-cresol is added and stirred evenly. KH-560, BYK-052 and ethyl acetate are added in sequence, and stirring is continued for 0.8-1.2 hours. After standing, the mixture is filtered to obtain a modified acrylate solution.

[0021] Further, the mass ratio of the polyurethane acrylate, trimethylolpropane triacrylate, 2,6-di-tert-butyl-p-cresol, KH-560, BYK-052 and ethyl acetate is 40-50:25-35:0.01-0.03:1.5-2.5:0.2-0.4:20-30.

[0022] Furthermore, the modified conductive liquid is prepared by the following steps: Mix polyvinyl alcohol, PEDOT:PSS and 1-hydroxyethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt evenly, then add the modified monomer and continue stirring for 12-16 minutes to obtain the modified conductive liquid.

[0023] Further, the mass ratio of the polyvinyl alcohol, PEDOT:PSS, 1-hydroxyethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt and the modified monomer is 9-11:100:11-13:1.8-2.2.

[0024] Furthermore, the modified monomer is prepared by the following steps: 2-Allylphenol was ultrasonically dispersed in methyl isobutyl ketone (MOH), and the temperature was raised to 86-92°C while stirring. Tetrabutylammonium bromide and toluene were then added, followed by dropwise addition of epichlorohydrin. The mixture was stirred for 3.6-4.2 hours, cooled to room temperature, and alkali solution was added dropwise. Stirring continued for 0.6-0.8 hours, followed by dropwise addition of alkali solution and stirring for another 1.8-2.2 hours. The mixture was then filtered under reduced pressure, washed, and dried to obtain the modified monomer. In the above reaction, MOH was used as the solvent, tetrabutylammonium bromide as the catalyst, and toluene as the dehydrating agent. The phenolic hydroxyl groups on the modified monomer first underwent a nucleophilic substitution reaction with epichlorohydrin, and then, under the action of alkali solution, the ring was closed and hydrogen chloride was removed to obtain the modified monomer.

[0025] Further, the mass ratio of the total amount of 2-allylphenol, methyl isobutyl ketone, tetrabutylammonium bromide, toluene, epichlorohydrin and alkali solution is 5-7:56-64:0.04-0.06:6-10:3.4-4:22-26.

[0026] Furthermore, the first added alkali solution is a sodium hydroxide aqueous solution with a mass fraction of 42-48%, and the second added alkali solution is a sodium hydroxide aqueous solution with a mass fraction of 32-36%, with the same mass of alkali solution added in both cases.

[0027] Furthermore, the wear-resistant coating liquid is prepared by the following steps: Mix polyurethane acrylate, functional acid ester and nano silica dispersion evenly, add photoinitiator, and ultrasonically disperse for 20-30 minutes to obtain wear-resistant coating liquid.

[0028] Furthermore, the mass ratio of the polyurethane acrylate, functional ester, nano silica dispersion and photoinitiator is 60-70:7-9:15-25:1.6-2.8.

[0029] Furthermore, the photoinitiator is 2,4,6-trimethylbenzoyl-diphenylphosphine oxide.

[0030] Furthermore, the nano-silica dispersion is prepared by mixing nano-silica and deionized water at a mass ratio of 3-4:40 and then uniformly dispersing the mixture using ultrasound.

[0031] Further, the functional ester is prepared by the following steps: Under nitrogen protection, 2-mercaptonicotinic acid, pentaerythritol, p-toluenesulfonic acid, and 2,6-di-tert-butyl-p-cresol were added to toluene, heated to 64-70°C, stirred for 8-10 hours, cooled to room temperature, washed until neutral, and distilled under reduced pressure to obtain the functional ester.

[0032] Further, the mass ratio of 2-mercaptonicotinic acid, pentaerythritol, p-toluenesulfonic acid, 2,6-di-tert-butyl-p-cresol and toluene is 3.4-3.8: 6.2-6.6: 0.02-0.04: 0.01-0.014: 80-120.

[0033] Compared with the prior art, the present invention has the following beneficial effects: To improve the mechanical properties, moisture barrier properties, and electrical conductivity of the prepared optically conductive film, this invention addresses this issue from three aspects. First, a modified acrylate solution is added during the preparation of the composite barrier layer. This modified acrylate solution is prepared by mixing trimethylolpropane triacrylate, polyurethane acrylate, and KH-560 in a specific ratio. Trimethylolpropane triacrylate can undergo free radical polymerization with polyurethane acrylate under the initiation of benzoyl peroxide, forming a three-dimensional network structure of acrylate and improving the mechanical properties of the optically conductive film. Second, it can act as anchoring points to undergo ring-opening reactions with the epoxy groups on KH-560, further enhancing the optically conductive properties. The mechanical properties of the membrane; the epoxy groups contained in KH-560 can chemically react with the hydroxyl groups on the surface of zinc oxide and the active groups contained in the interface modification layer, increasing the crosslinking degree of the composite barrier layer, strengthening the intermolecular bonding force, making it difficult for water molecules to penetrate the membrane and improve the water vapor barrier performance of the optical conductive film; secondly, a modified conductive liquid was added during the preparation of the conductive layer. The modified conductive liquid was prepared by mixing PEDOT:PSS, 1-hydroxyethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt, polyvinyl alcohol and modified monomers in a specific ratio. 1-hydroxyethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt has high conductivity and can react with PEDOT on the one hand. The sulfonic acid groups on PSS form hydrogen bonds, promoting the uniform dispersion of ionic liquids between molecular chains and filling agglomeration gaps. On the other hand, it can synergistically construct an "electron-ion" dual conductive pathway with the electronic conductivity properties of PEDOT:PSS, while reducing the charge transport resistance between PEDOT:PSS molecular chains and improving the overall conductivity of the optical conductive film. Polyvinyl alcohol not only forms hydrogen bonds with the PEDOT:PSS molecular chains, preventing PEDOT:PSS agglomeration and ensuring uniform dispersion in the conductive layer to form continuous conductive pathways, reducing conductive dead zones and improving the conductivity of the optical conductive film, but it can also entangle with the acrylate network structure to form… The semi-interpenetrating network structure, with its rigid benzene ring in the modified monomer, can generate π-π conjugation and π-π stacking interactions with the imidazole group on the 1-hydroxyethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt to form a continuous electron delocalization system, effectively improving carrier mobility and the continuity of conductive channels, and significantly enhancing the material's conductivity. Thirdly, functional acid esters are added to the wear-resistant coating liquid. The functional acid esters in the wear-resistant coating liquid not only have rigid pyridine rings, but also contain thiol groups that can chemically crosslink with the unsaturated double bonds in the modified monomer, thereby introducing rigid pyridine rings. Through their synergistic effect, the mechanical properties, water vapor barrier properties, and conductivity of the optical conductive film are improved. Detailed Implementation

[0034] To make the embodiments of the present invention easier to understand, the present invention will be described in detail below with reference to specific embodiments. These embodiments are for illustrative purposes only and are not limited to the application scope of the present invention.

[0035] The present invention will be further described in detail below with reference to embodiments and comparative examples.

[0036] This invention provides a high-barrier flexible optical conductive film, which, from bottom to top, comprises a flexible polymer substrate, an interface modification layer, a composite barrier layer, a conductive layer, and a wear-resistant coating. The flexible polymer substrate is a PET substrate; the raw material for preparing the interface modification layer is a modification liquid; the raw material for preparing the conductive layer is a modified conductive liquid; the raw material for preparing the wear-resistant coating is a wear-resistant coating liquid; the composite barrier layer is prepared by first depositing zinc oxide on the surface of the interface modification layer by atomic layer deposition to obtain a zinc oxide layer, and then coating the surface of the zinc oxide layer with a modified acrylate solution and performing a thermosetting treatment.

[0037] The modified liquid is prepared by the following steps: Add KH-560 to an ethanol-water solution and stir until homogeneous. Then add isobornyl acrylate and continue stirring for 12-16 minutes to obtain the modified solution.

[0038] The mass ratio of KH-560, ethanol aqueous solution and isoborneol acrylate is 1-1.6:100-120:4.6-5.

[0039] The modified acrylate solution is prepared by the following steps: Polyurethane acrylate and trimethylolpropane triacrylate are mixed and stirred evenly. Then, 2,6-di-tert-butyl-p-cresol is added and stirred evenly. KH-560, BYK-052 and ethyl acetate are added in sequence, and stirring is continued for 0.8-1.2 hours. After standing, the mixture is filtered to obtain a modified acrylate solution.

[0040] The mass ratio of the polyurethane acrylate, trimethylolpropane triacrylate, 2,6-di-tert-butyl-p-cresol KH-560, BYK-052 and ethyl acetate is 40-50:25-35:0.01-0.03:1.5-2.5:0.2-0.4:20-30.

[0041] The modified conductive liquid is prepared by the following steps: Polyvinyl alcohol, PEDOT:PSS, and 1-hydroxyethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt are mixed evenly, and then the modified monomer is added. The mixture is stirred for 12-16 minutes to obtain the modified conductive liquid. The mass ratio of polyvinyl alcohol, PEDOT:PSS, 1-hydroxyethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt and modified monomer is 9-11:100:11-13:1.8-2.2.

[0042] The modified monomer is prepared by the following steps: 2-Allylphenol was ultrasonically dispersed in methyl isobutyl ketone, and the mixture was heated to 86-92℃ while stirring. Tetrabutylammonium bromide and toluene were then added, followed by epichlorohydrin. The mixture was stirred for 3.6-4.2 h, cooled to room temperature, and alkali solution was added dropwise. Stirring continued for 0.6-0.8 h, followed by another dropwise addition of alkali solution and stirring for another 1.8-2.2 h. The mixture was then filtered under reduced pressure, washed, and dried to obtain the modified monomer. The mass ratio of 2-allylphenol, methyl isobutyl ketone, tetrabutylammonium bromide, toluene, epichlorohydrin, and alkali solution was 5-7:56-64:0.04-0.06:6-10:3.4-4:22-26.

[0043] The wear-resistant coating liquid is prepared by the following steps: The polyurethane acrylate, functional acid ester, and nano silica dispersion are mixed evenly, and a photoinitiator is added. The mixture is ultrasonically dispersed for 20-30 minutes to obtain a wear-resistant coating liquid. The mass ratio of polyurethane acrylate, functional acid ester, nano silica dispersion, and photoinitiator is 60-70:7-9:15-25:1.6-2.8.

[0044] The functional ester is prepared by the following steps: Under nitrogen protection, 2-mercaptonicotinic acid, pentaerythritol, p-toluenesulfonic acid, and 2,6-di-tert-butyl-p-cresol were added to toluene. The mixture was heated to 64-70°C and stirred for 8-10 hours. After cooling to room temperature, the mixture was washed and distilled under reduced pressure to obtain a functional ester. The mass ratio of 2-mercaptonicotinic acid, pentaerythritol, p-toluenesulfonic acid, 2,6-di-tert-butyl-p-cresol, and toluene was 3.4-3.8: 6.2-6.6: 0.02-0.04: 0.01-0.014: 80-120.

[0045] A method for preparing a high-barrier flexible optical conductive film includes the following steps: Step S1: Clean the flexible polymer substrate, dry it, and then treat it with plasma to obtain a pretreated flexible polymer substrate. Step S2: Coat the modified liquid onto the surface of the pretreated flexible polymer substrate to obtain an interface modified layer; Step S3: Deposit zinc oxide on the surface of the interface modified layer using atomic layer deposition to obtain a zinc oxide layer. Coat the surface of the zinc oxide layer with a modified acrylate solution and then perform a thermosetting treatment to obtain a composite barrier layer. Step S4: Spin-coat the modified conductive liquid onto the surface of the composite barrier layer, and then perform heat preservation treatment to obtain the conductive layer; Step S5: Apply the wear-resistant coating liquid to the surface of the conductive layer, cure it with ultraviolet light to obtain the wear-resistant coating, and after cutting, obtain a high-barrier flexible optical conductive film.

[0046] The specific parameters and sources of the raw materials used in the embodiments of this invention are as follows: PET substrate was purchased from Advanced Institute of Technology (Shenzhen) Co., Ltd., batch number 20221201519; PEDOT: PSS was purchased from Chengdu Jingyi New Materials Co., Ltd., brand: Heraeus, solid content: (1±0.1)%, conductivity: ≥1500S / cm; KH-560 was purchased from Wuhan Kemike Biomedical Technology Co., Ltd., CAS number 2530-83-8; polyurethane acrylate was purchased from Jining Tangyi Chemical Co., Ltd., brand name NeoRad. TM U-6282, product number U-6282; nano silica was purchased from Wanqing (Jiangyin) Chemical Technology Co., Ltd., CAS number 112945-52-5; 1-hydroxyethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt was purchased from Wuhan Smike Biotechnology Co., Ltd., CAS number 174899-86-6; polyvinyl alcohol was purchased from Wuhan Shuer Biotechnology Co., Ltd., CAS number 9002-89-5; isoborneol acrylate was purchased from Hubei Shuaiyan Ligao Biomedical Co., Ltd., CAS number 5888-33-5; trimethylolpropane triacrylate was purchased from Shandong Xinhongyunguang Chemical Co., Ltd., CAS number 15625-89-5.

[0047] Examples 1-3 and Comparative Examples 1-5 provide a high-barrier flexible optical conductive film and a method for preparing the same.

[0048] Example 1 This embodiment provides a high-barrier flexible optical conductive film, which, from bottom to top, includes a flexible polymer substrate, an interface modification layer, a composite barrier layer, a conductive layer, and a wear-resistant coating. The flexible polymer substrate is a PET substrate; the raw material for preparing the interface modification layer is a modification liquid; the raw material for preparing the conductive layer is a modified conductive liquid; the raw material for preparing the wear-resistant coating is a wear-resistant coating liquid; the composite barrier layer is prepared by first depositing zinc oxide on the surface of the interface modification layer by atomic layer deposition to obtain a zinc oxide layer, and then coating the surface of the zinc oxide layer with a modified acrylate solution and performing a thermosetting treatment. A method for preparing a high-barrier flexible optical conductive film includes the following steps: Step S1: Place the PET substrate in an ultrasonic cleaning tank for cleaning, dry at 55°C, and then treat with plasma to obtain a pretreated flexible polymer substrate. The cleaning process is as follows: ultrasonically clean the substrate sequentially with deionized water and anhydrous ethanol for 16 minutes each. The amount of deionized water is 60% of the effective volume of the ultrasonic cleaning tank, and the amount of anhydrous ethanol is 50% of the effective volume of the ultrasonic cleaning tank. Both deionized water and anhydrous ethanol must completely immerse the PET substrate, with the liquid level 2 cm above the highest point of the PET substrate. The specific parameters for ultrasonic cleaning are: ultrasonic frequency 80 kHz, ultrasonic power 20 W, and temperature 40°C. The specific parameters for plasma treatment are: power 80 W, oxygen flow rate 15 sccm, pressure 50 Pa, and treatment time 2 minutes. Step S2: The modified liquid is coated onto the surface of the pretreated flexible polymer substrate using a slit extrusion coating machine. The slit die gap is set to 40 μm, the pump flow rate is 0.8 mL / min, the back pressure roller linear pressure is 0.15 N / mm, the coating speed is controlled to be 1 m / min, and the coating amount is 5 g / m², resulting in an interface modified layer with a thickness of 8 nm. Step S3: Zinc oxide is deposited on the surface of the interface-modified layer using atomic layer deposition (ALD) to obtain a zinc oxide layer with a thickness of 15 nm. A modified acrylate solution is then coated onto the zinc oxide layer surface using a slot extrusion coating machine. The slot die gap is set to 50 μm, the pump flow rate to 1.0 mL / min, the back pressure roller linear pressure to 0.05 N / mm, the coating amount to 5 g / m², and the coating speed to 1 m / min. After thermosetting, a composite barrier layer with a thickness of 260 nm is obtained. The atomic layer deposition method has… The bulk process parameters are as follows: DEZ pulse time is 0.1s, H2O pulse time is 0.1s, DEZ post-purge time is 4s, H2O post-purge time is 4s, deposition temperature is 80℃, carrier gas is nitrogen, carrier gas flow rate is 50sccm, gas purge flow rate is 100sccm, deposition rate per cycle is 0.18nm / cycle, number of cycles is 75, and the specific thermal curing treatment is as follows: under nitrogen protection atmosphere, the temperature is increased to 200℃ at a heating rate of 2℃ / min, and the thermal curing treatment is performed for 10min. Step S4: Spin-coat the modified conductive liquid onto the surface of the composite barrier layer, and after heat preservation treatment, obtain a conductive layer with a thickness of 10nm. The specific parameters of the spin-coating process are: spin-coating speed 1500rpm, spin-coating time 40s. The specific process parameters of the heat preservation treatment are: nitrogen atmosphere, heating to 60℃ at a heating rate of 2℃ / min, heat curing treatment for 20min, then heating to 85℃ at a heating rate of 5℃ / min, and heat preservation time for 50min. Step S5: Apply the wear-resistant coating liquid to the surface of the conductive layer using a slit extrusion coating machine. Set the slit die gap to 80μm, the pump flow rate to 1.5mL / min, the back pressure roller linear pressure to 0.08N / mm, control the coating speed to 1m / min, and the coating amount to 8g / m². After UV curing, a wear-resistant coating with a thickness of 40nm is obtained. Cut the coating into a film with a size of 100mm×80mm to obtain a high-barrier flexible optical conductive film. The specific process parameters for UV curing are: UV wavelength of 365nm, light intensity of 600mW / cm², and curing time of 6s. The modified liquid is prepared by the following steps: KH-560 was added to a 60% ethanol aqueous solution, and the stirring speed was controlled at 460 rpm for 6 minutes until homogeneous. Then, isobornyl acrylate was added, and the stirring speed was kept constant for 12 minutes to obtain the modified solution. The mass ratio of KH-560, ethanol aqueous solution and isobornyl acrylate was 1:100:4.6. The modified acrylate solution is prepared by the following steps: Polyurethane acrylate and trimethylolpropane triacrylate were mixed and stirred at 300 rpm for 12 min until homogeneous. Then, 2,6-di-tert-butyl-p-cresol was added, and the stirring was maintained at the same speed for 8 min until homogeneous. KH-560, BYK-052 and ethyl acetate were added in sequence, the stirring speed was adjusted to 500 rpm, and stirring was continued for 0.8 h. After standing for 20 min, the mixture was filtered to obtain a modified acrylate solution. The mass ratio of polyurethane acrylate, trimethylolpropane triacrylate, 2,6-di-tert-butyl-p-cresol, KH-560, BYK-052 and ethyl acetate was 40:25:0.01:1.5:0.2:20. The modified conductive liquid is prepared by the following steps: Polyvinyl alcohol, PEDOT:PSS, and 1-hydroxyethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt were stirred at 540 rpm for 14 min until homogeneous. Then, the modified monomer was added, and stirring was continued for 12 min to obtain the modified conductive liquid. The mass ratio of polyvinyl alcohol, PEDOT:PSS, 1-hydroxyethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt, and modified monomer was 9:100:11:1.8. The modified monomer is prepared by the following steps: 2-Allylphenol was ultrasonically dispersed in methyl isobutyl ketone at a frequency of 25 kHz and a power of 450 W for 24 min. The mixture was stirred at 500 rpm while the temperature was increased to 86 °C. Tetrabutylammonium bromide and toluene were then added, followed by dropwise addition of epichlorohydrin over 10 min. After the addition was complete, the mixture was stirred for 3.6 h. The mixture was then cooled to room temperature, and while maintaining the stirring speed, an alkaline solution was added dropwise over 30 min. Stirring continued for 0.6 h, followed by another dropwise addition of the alkaline solution over 30 min. Stirring continued for 1.8 h, and the mixture was then subjected to reduced pressure. The mixture was filtered and washed three times each with anhydrous ethanol and deionized water (each time the mass of anhydrous ethanol and deionized water was 20% of the mass of methyl isobutyl ketone). It was then dried at 50°C to constant weight to obtain the modified monomer. The mass ratio of 2-allylphenol, methyl isobutyl ketone, tetrabutylammonium bromide, toluene, epichlorohydrin and the total amount of alkali solution was 5:56:0.04:6:3.4:22. The first drop of alkali solution was a 42% sodium hydroxide aqueous solution, and the second drop of alkali solution was a 32% sodium hydroxide aqueous solution. The mass of alkali solution added in both drops was the same. The wear-resistant coating liquid is prepared by the following steps: A polyurethane acrylate, functional ester, and nano silica dispersion were mixed at 500 rpm for 12 min until homogeneous. 2,4,6-trimethylbenzoyl-diphenylphosphine oxide was added, and the mixture was ultrasonically dispersed at 25 kHz and 400 W for 20 min to obtain a wear-resistant coating liquid. The mass ratio of polyurethane acrylate, functional ester, nano silica dispersion, and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide was 60:7:15:1.6. The nano silica dispersion was prepared by mixing nano silica and deionized water at a mass ratio of 3:40 and ultrasonically dispersing at 25 kHz and 400 W for 14 min until homogeneous. The functional ester is prepared by the following steps: Under nitrogen protection, 2-mercaptonicotinic acid, pentaerythritol, p-toluenesulfonic acid, and 2,6-di-tert-butyl-p-cresol were added to toluene. The mixture was heated to 64°C, stirred at 600 rpm for 8 hours, cooled to room temperature, and washed with a 0.5% sodium bicarbonate aqueous solution until neutral. The mixture was then distilled under reduced pressure at a vacuum of -0.095 MPa, at 90°C for 2.2 hours to obtain a functional ester. The mass ratio of 2-mercaptonicotinic acid, pentaerythritol, p-toluenesulfonic acid, 2,6-di-tert-butyl-p-cresol, and toluene was 3.4:6.2:0.02:0.01:80.

[0049] Example 2 This embodiment provides a high-barrier flexible optical conductive film, which, from bottom to top, includes a flexible polymer substrate, an interface modification layer, a composite barrier layer, a conductive layer, and a wear-resistant coating. The flexible polymer substrate is a PET substrate; the raw material for preparing the interface modification layer is a modification liquid; the raw material for preparing the conductive layer is a modified conductive liquid; the raw material for preparing the wear-resistant coating is a wear-resistant coating liquid; the composite barrier layer is prepared by first depositing zinc oxide on the surface of the interface modification layer by atomic layer deposition to obtain a zinc oxide layer, and then coating the surface of the zinc oxide layer with a modified acrylate solution and performing a thermosetting treatment. A method for preparing a high-barrier flexible optical conductive film includes the following steps: Step S1: Place the PET substrate in an ultrasonic cleaning tank for cleaning, dry at 60°C, and then treat with plasma to obtain a pretreated flexible polymer substrate. The cleaning process is as follows: ultrasonically clean with deionized water and anhydrous ethanol for 19 minutes in sequence. The amount of deionized water is 65% of the effective volume of the ultrasonic cleaning tank, and the amount of anhydrous ethanol is 65% of the effective volume of the ultrasonic cleaning tank. Both deionized water and anhydrous ethanol must completely immerse the PET substrate, with the liquid level 2.6 cm above the highest point of the PET substrate. The specific parameters for ultrasonic cleaning are: ultrasonic frequency 90 kHz, ultrasonic power 25 W, and temperature 45°C. The specific parameters for plasma treatment are: power 90 W, oxygen flow rate 18 sccm, pressure 75 Pa, and treatment time 4 minutes. Step S2: The modified liquid is coated onto the surface of the pretreated flexible polymer substrate using a slit extrusion coating machine. The slit die gap is set to 50 μm, the pump flow rate is 1.0 mL / min, the back pressure roller linear pressure is 0.20 N / mm, the coating speed is controlled to be 1.5 m / min, and the coating amount is 6.5 g / m², resulting in an interface modified layer with a thickness of 10 nm. Step S3: Zinc oxide is deposited on the surface of the interface-modified layer using atomic layer deposition (ALD) to obtain a zinc oxide layer with a thickness of 20 nm. A modified acrylate solution is then coated onto the zinc oxide layer surface using a slot extrusion coating machine. The slot die gap is set to 60 μm, the pump flow rate to 1.2 mL / min, the back pressure roller linear pressure to 0.08 N / mm, the coating amount to 6 g / m², and the coating speed to 1.5 m / min. After thermosetting, a composite barrier layer with a thickness of 290 nm is obtained. The atomic layer deposition method... The specific process parameters are as follows: DEZ pulse time is 0.2s, H2O pulse time is 0.2s, DEZ post-purge time is 5s, H2O post-purge time is 5s, deposition temperature is 100℃, carrier gas is argon, carrier gas flow rate is 75sccm, gas purge flow rate is 200sccm, deposition rate per cycle is 0.2nm / cycle, number of cycles is 100, and the specific thermal curing treatment is as follows: under nitrogen protection atmosphere, the temperature is increased to 210℃ at a heating rate of 3℃ / min, and the thermal curing treatment is performed for 15min. Step S4: Spin-coat the modified conductive liquid onto the surface of the composite barrier layer, and after heat preservation treatment, obtain a conductive layer with a thickness of 20nm. The specific parameters of the spin-coating process are: spin-coating speed 1850rpm, spin-coating time 50s. The specific process parameters of the heat preservation treatment are: nitrogen atmosphere, heating to 60℃ at a heating rate of 3℃ / min, heat curing treatment for 30min, then heating to 90℃ at a heating rate of 5℃ / min, and heat preservation time for 65min. Step S5: Apply the wear-resistant coating liquid to the surface of the conductive layer using a slit extrusion coating machine. Set the slit die gap to 100μm, the pump flow rate to 1.8mL / min, the back pressure roller linear pressure to 0.10N / mm, control the coating speed to 1.5m / min, and the coating amount to 10g / m². After UV curing, a wear-resistant coating with a thickness of 50nm is obtained. Cut the coating into a film with a size of 150mm×120mm to obtain a high-barrier flexible optical conductive film. The specific process parameters for UV curing are: UV wavelength of 365nm, light intensity of 700mW / cm², and curing time of 8s. The modified liquid is prepared by the following steps: KH-560 was added to a 62% ethanol aqueous solution, and the mixture was stirred at 500 rpm for 9 minutes until homogeneous. Then, isobornyl acrylate was added, and the stirring was continued for 14 minutes while maintaining the same speed to obtain the modified solution. The mass ratio of KH-560, ethanol aqueous solution and isobornyl acrylate was 1.3:110:4.8. The modified acrylate solution is prepared by the following steps: Polyurethane acrylate and trimethylolpropane triacrylate were mixed and stirred at 350 rpm for 14 min until homogeneous. Then, 2,6-di-tert-butyl-p-cresol was added, and the stirring speed was maintained at a constant speed for 10 min until homogeneous. KH-560, BYK-052 and ethyl acetate were added sequentially, the stirring speed was adjusted to 550 rpm, and stirring was continued for 1 h. After standing for 25 min, the mixture was filtered to obtain a modified acrylate solution. The mass ratio of polyurethane acrylate, trimethylolpropane triacrylate, 2,6-di-tert-butyl-p-cresol, KH-560, BYK-052 and ethyl acetate was 45:30:0.02:2:0.3:25. The modified conductive liquid is prepared by the following steps: Polyvinyl alcohol, PEDOT:PSS, and 1-hydroxyethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt were stirred at 560 rpm for 17 min until homogeneous. Then, the modified monomer was added, and stirring was continued for 14 min to obtain the modified conductive liquid. The mass ratio of polyvinyl alcohol, PEDOT:PSS, 1-hydroxyethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt, and modified monomer was 10:100:12:2. The modified monomer is prepared by the following steps: 2-Allylphenol was ultrasonically dispersed in methyl isobutyl ketone at a frequency of 30 kHz and a power of 500 W for 26 min. The mixture was stirred at 550 rpm while the temperature was increased to 89 °C. Tetrabutylammonium bromide and toluene were then added, followed by dropwise addition of epichlorohydrin over 10 min. After the addition was complete, the mixture was stirred for 3.9 h. The mixture was then cooled to room temperature, and while maintaining the stirring speed, an alkaline solution was added dropwise over 30 min. Stirring continued for 0.7 h, followed by another dropwise addition of the alkaline solution over 30 min. Stirring continued for 2 h, and the mixture was then filtered under reduced pressure. The mixture was washed four times each with anhydrous ethanol and deionized water (each time the mass of anhydrous ethanol and deionized water was 20% of the mass of methyl isobutyl ketone), and dried at 55°C to constant weight to obtain the modified monomer. The mass ratio of 2-allylphenol, methyl isobutyl ketone, tetrabutylammonium bromide, toluene, epichlorohydrin and the total amount of alkali solution was 6:60:0.05:8:3.7:24. The first drop of alkali solution was a 45% sodium hydroxide aqueous solution, and the second drop of alkali solution was a 34% sodium hydroxide aqueous solution. The mass of alkali solution added in both drops was the same. The wear-resistant coating liquid is prepared by the following steps: A polyurethane acrylate, functional ester, and nano silica dispersion were mixed at 550 rpm for 14 min until homogeneous. 2,4,6-trimethylbenzoyl-diphenylphosphine oxide was added, and the mixture was ultrasonically dispersed at 30 kHz and 450 W for 25 min to obtain a wear-resistant coating liquid. The mass ratio of polyurethane acrylate, functional ester, nano silica dispersion, and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide was 65:8:20:2.2. The nano silica dispersion was prepared by mixing nano silica and deionized water at a mass ratio of 3.5:40 and ultrasonically dispersing at 30 kHz and 450 W for 16 min until homogeneous. The functional ester is prepared by the following steps: Under nitrogen protection, 2-mercaptonicotinic acid, pentaerythritol, p-toluenesulfonic acid, and 2,6-di-tert-butyl-p-cresol were added to toluene. The mixture was heated to 67°C, stirred at 650 rpm for 9 hours, cooled to room temperature, and washed with a 0.5% sodium bicarbonate aqueous solution until neutral. The mixture was then distilled under reduced pressure at a vacuum of -0.096 MPa, at 95°C for 2.4 hours to obtain a functional ester. The mass ratio of 2-mercaptonicotinic acid, pentaerythritol, p-toluenesulfonic acid, 2,6-di-tert-butyl-p-cresol, and toluene was 3.6:6.4:0.03:0.012:100.

[0050] Example 3 This embodiment provides a high-barrier flexible optical conductive film, which, from bottom to top, includes a flexible polymer substrate, an interface modification layer, a composite barrier layer, a conductive layer, and a wear-resistant coating. The flexible polymer substrate is a PET substrate; the raw material for preparing the interface modification layer is a modification liquid; the raw material for preparing the conductive layer is a modified conductive liquid; the raw material for preparing the wear-resistant coating is a wear-resistant coating liquid; the composite barrier layer is prepared by first depositing zinc oxide on the surface of the interface modification layer by atomic layer deposition to obtain a zinc oxide layer, and then coating the surface of the zinc oxide layer with a modified acrylate solution and performing a thermosetting treatment. A method for preparing a high-barrier flexible optical conductive film includes the following steps: Step S1: Place the PET substrate in an ultrasonic cleaning tank for cleaning, dry at 65°C, and then treat with plasma to obtain a pretreated flexible polymer substrate. The cleaning process is as follows: ultrasonically clean with deionized water and anhydrous ethanol for 22 minutes in sequence. The amount of deionized water is 70% of the effective volume of the ultrasonic cleaning tank, and the amount of anhydrous ethanol is 60% of the effective volume of the ultrasonic cleaning tank. Both deionized water and anhydrous ethanol must completely immerse the PET substrate, with the liquid level 3 cm above the highest point of the PET substrate. The specific parameters for ultrasonic cleaning are: ultrasonic frequency 100 kHz, ultrasonic power 30 W, and temperature 50°C. The specific parameters for plasma treatment are: power 100 W, oxygen flow rate 20 sccm, pressure 100 Pa, and treatment time 5 minutes. Step S2: The modified liquid is coated onto the surface of the pretreated flexible polymer substrate using a slit extrusion coating machine. The slit die gap is set to 60 μm, the pump flow rate is 1.2 mL / min, the back pressure roller linear pressure is 0.25 N / mm, the coating speed is controlled to be 2 m / min, and the coating amount is 8 g / m², resulting in an interface modified layer with a thickness of 12 nm. Step S3: Zinc oxide is deposited on the surface of the interface-modified layer using atomic layer deposition (ALD) to obtain a zinc oxide layer with a thickness of 25 nm. A modified acrylate solution is then coated onto the zinc oxide layer using a slot extrusion coating machine. The slot die gap is set to 70 μm, the pump flow rate to 1.5 mL / min, the back pressure roller linear pressure to 0.10 N / mm, the coating amount to 7 g / m², and the coating speed to 2 m / min. After thermosetting, a composite barrier layer with a thickness of 320 nm is obtained. The specific details of the atomic layer deposition method are as follows: The process parameters are as follows: DEZ pulse time is 0.3s, H2O pulse time is 0.3s, DEZ post-purge time is 6s, H2O post-purge time is 6s, deposition temperature is 120℃, carrier gas is nitrogen, carrier gas flow rate is 100sccm, gas purge flow rate is 300sccm, deposition rate per cycle is 0.22nm / cycle, number of cycles is 125, and the specific thermal curing treatment is as follows: under nitrogen protection atmosphere, the temperature is increased to 220℃ at a heating rate of 4℃ / min, and the thermal curing treatment is performed for 20min. Step S4: Spin-coat the modified conductive liquid onto the surface of the composite barrier layer, and after heat preservation treatment, obtain a conductive layer with a thickness of 30nm. The specific parameters of the spin-coating process are: spin-coating speed 2200rpm, spin-coating time 60s. The specific process parameters of the heat preservation treatment are: nitrogen atmosphere, heating to 60℃ at a heating rate of 4℃ / min, heat curing treatment for 40min, then heating to 95℃ at a heating rate of 5℃ / min, and heat preservation time for 80min. Step S5: Apply the wear-resistant coating liquid to the surface of the conductive layer using a slit extrusion coating machine. Set the slit die gap to 120μm, the pump flow rate to 2.0mL / min, the back pressure roller linear pressure to 0.12N / mm, control the coating speed to 2m / min, and the coating amount to 12g / m². After UV curing, a wear-resistant coating with a thickness of 60nm is obtained. Cut the coating into films with a size of 200mm×150mm to obtain a high-barrier flexible optical conductive film. The specific process parameters for UV curing are: UV wavelength of 365nm, light intensity of 800mW / cm², and curing time of 10s. The modified liquid is prepared by the following steps: KH-560 was added to a 64% ethanol aqueous solution, and the stirring speed was controlled at 540 rpm for 12 min until homogeneous. Then, isobornyl acrylate was added, and the stirring speed was kept constant for 16 min to obtain the modified solution. The mass ratio of KH-560, ethanol aqueous solution and isobornyl acrylate was 1.6:120:5. The modified acrylate solution is prepared by the following steps: Polyurethane acrylate and trimethylolpropane triacrylate were stirred at 400 rpm for 16 min until homogeneous. Then, 2,6-di-tert-butyl-p-cresol was added, and the stirring speed was maintained at a constant speed for 12 min until homogeneous. KH-560, BYK-052 and ethyl acetate were added sequentially, the stirring speed was adjusted to 600 rpm, and stirring was continued for 1.2 h. After standing for 30 min, the mixture was filtered to obtain a modified acrylate solution. The mass ratio of polyurethane acrylate, trimethylolpropane triacrylate, 2,6-di-tert-butyl-p-cresol, KH-560, BYK-052 and ethyl acetate was 50:35:0.03:2.5:0.4:30. The modified conductive liquid is prepared by the following steps: Polyvinyl alcohol, PEDOT:PSS, and 1-hydroxyethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt were stirred at 580 rpm for 20 min until homogeneous. Then, the modified monomer was added, and stirring was continued for 16 min to obtain the modified conductive liquid. The mass ratio of polyvinyl alcohol, PEDOT:PSS, 1-hydroxyethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt, and modified monomer was 11:100:13:2.2. The modified monomer is prepared by the following steps: 2-Allylphenol was ultrasonically dispersed in methyl isobutyl ketone at a frequency of 35 kHz and a power of 550 W for 28 min. The mixture was stirred at 600 rpm while the temperature was increased to 92 °C. Tetrabutylammonium bromide and toluene were then added, followed by dropwise addition of epichlorohydrin over 10 min. After the addition was complete, the mixture was stirred for 4.2 h. The mixture was then cooled to room temperature, and while maintaining the stirring speed, an alkaline solution was added dropwise over 30 min. Stirring continued for 0.8 h, followed by another dropwise addition of the alkaline solution over 30 min. Stirring continued for 2.2 h, and the mixture was then subjected to reduced pressure. The mixture was filtered and washed five times each with anhydrous ethanol and deionized water (each time the mass of anhydrous ethanol and deionized water was 20% of the mass of methyl isobutyl ketone). It was then dried at 60°C to constant weight to obtain the modified monomer. The mass ratio of 2-allylphenol, methyl isobutyl ketone, tetrabutylammonium bromide, toluene, epichlorohydrin, and the total amount of alkali solution was 7:64:0.06:10:4:26. ​​The first drop of alkali solution was a 48% sodium hydroxide aqueous solution, and the second drop of alkali solution was a 36% sodium hydroxide aqueous solution. The mass of alkali solution added in both drops was the same. The wear-resistant coating liquid is prepared by the following steps: A polyurethane acrylate, functional acid ester, and nano silica dispersion were mixed at 600 rpm for 16 min until homogeneous. 2,4,6-trimethylbenzoyl-diphenylphosphine oxide was added, and the mixture was ultrasonically dispersed at 35 kHz and 500 W for 30 min to obtain a wear-resistant coating liquid. The mass ratio of polyurethane acrylate, functional acid ester, nano silica dispersion, and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide was 70:9:25:2.8. The nano silica dispersion was prepared by mixing nano silica and deionized water at a mass ratio of 4:40 and ultrasonically dispersing at 35 kHz and 500 W for 18 min until homogeneous. The functional ester is prepared by the following steps: Under nitrogen protection, 2-mercaptonicotinic acid, pentaerythritol, p-toluenesulfonic acid, and 2,6-di-tert-butyl-p-cresol were added to toluene. The mixture was heated to 70°C, stirred at 700 rpm for 10 h, cooled to room temperature, and washed with a 0.5% sodium bicarbonate aqueous solution until neutral. The mixture was then distilled under reduced pressure at a vacuum of -0.098 MPa, at 100°C for 2.6 h to obtain a functional ester. The mass ratio of 2-mercaptonicotinic acid, pentaerythritol, p-toluenesulfonic acid, 2,6-di-tert-butyl-p-cresol, and toluene was 3.8:6.6:0.04:0.014:120.

[0051] Comparative Example 1 Comparative Example 1 is the same as Example 1, except that in the preparation of the modified acrylate solution, trimethylolpropane triacrylate is replaced with an equal mass of ethylene glycol diacrylate, while the remaining steps and raw materials are the same as in Example 1.

[0052] Comparative Example 2 Comparative Example 2 is the same as Example 1, except that in the preparation of the modified monomer, 2-allylphenol is replaced with an equal mass of 4-propylphenol, while the remaining steps and raw materials are the same as in Example 1.

[0053] Comparative Example 3 Comparative Example 3 is the same as Example 1, except that in the preparation of the modified conductive liquid, 1-hydroxyethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt is replaced with an equal mass of polyvinylpyrrolidone, while the remaining steps and raw materials are the same as in Example 1.

[0054] Comparative Example 4 Comparative Example 4 is the same as Example 1, except that in the preparation of the modified conductive liquid, polyvinyl alcohol is replaced with an equal mass of polyvinylpyrrolidone, while the remaining steps and raw materials are the same as in Example 1.

[0055] Comparative Example 5 Comparative Example 5 is the same as Example 1, except that in the preparation of the functional ester, 2-mercaptonicotinic acid is replaced with an equal mass of 3-mercaptopropionic acid, while the other steps and raw materials are the same as in Example 1.

[0056] Performance testing The high-barrier flexible optical conductive films prepared in Examples 1-3 and Comparative Examples 1-5 of this invention were subjected to performance tests. The specific test methods are as follows: Mechanical property testing: Tensile strength, elongation at break, and tensile strength retention were tested according to GB / T 25255-2010 "Method for Determination of Tensile Properties of Optical Functional Films Polyethylene Terephthalate (PET) Films"; adhesion was tested according to GB / T9286-2021 "Cross-cut Test of Paint and Varnish Films"; the specific test results are shown in Table 1. Table 1. Test results of mechanical properties of high-barrier flexible optical conductive films

[0057] As can be seen from Table 1, compared with Comparative Examples 1-5, the high-barrier flexible optical conductive films prepared by the methods provided in Examples 1-3 have excellent mechanical properties.

[0058] Water vapor barrier performance test: The water vapor transmission rate was tested according to GB / T 26253-2010 "Determination of water vapor transmission rate of plastic films and sheets - Infrared detector method". The formula for calculating the water vapor transmission rate retention rate is as follows:

[0059] The specific test results are shown in Table 2; Table 2. Test results of water vapor barrier performance of high-barrier flexible optical conductive films

[0060] As shown in Table 2, compared with Comparative Examples 1-5, the high-barrier flexible optical conductive films prepared in Examples 1-3 have better water vapor barrier properties.

[0061] Conductivity test: According to GB / T 1551-2022 "Test method for resistivity and Hall coefficient of semiconductor single crystal" (four-probe method), the conductivity of optical conductive films placed for 1000h under environmental conditions of 23℃ and RH 50% and environmental conditions of 85℃ and RH 85% were tested using a four-probe sheet resistance tester. The specific test results are shown in Table 3. Table 3. Test results of conductivity properties of high-barrier flexible optical conductive films

[0062] As shown in Table 3, compared with Comparative Examples 1-5, the high-barrier flexible optical conductive films prepared in Examples 1-3 have lower initial sheet resistance and conductivity attenuation rate. This indicates that the high-barrier flexible optical conductive films prepared by the method provided in Examples 1-3 have superior conductivity.

[0063] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A high-barrier flexible optical conductive film, characterized in that, From bottom to top, it includes a flexible polymer substrate, an interface modification layer, a composite barrier layer, a conductive layer, and a wear-resistant coating. The flexible polymer substrate is a PET substrate; the raw material for preparing the interface modification layer is a modification liquid; the raw material for preparing the conductive layer is a modified conductive liquid; the raw material for preparing the wear-resistant coating is a wear-resistant coating liquid; the composite barrier layer is prepared by first depositing zinc oxide on the surface of the interface modification layer by atomic layer deposition to obtain a zinc oxide layer, and then coating the surface of the zinc oxide layer with a modified acrylate solution and subjecting it to thermosetting treatment. The modified acrylate solution is prepared by the following steps: Polyurethane acrylate and trimethylolpropane triacrylate are mixed and stirred evenly. Then 2,6-di-tert-butyl-p-cresol is added and stirred evenly. KH-560, BYK-052 and ethyl acetate are added in sequence and stirred for 0.8-1.2 hours. After standing, the mixture is filtered to obtain a modified acrylate solution. The modified conductive liquid is prepared by the following steps: Polyvinyl alcohol, PEDOT:PSS and 1-hydroxyethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt are mixed evenly, then the modified monomer is added and the mixture is stirred for 12-16 minutes to obtain the modified conductive liquid. The modified monomer is prepared by the following steps: 2-Allylphenol was ultrasonically dispersed in methyl isobutyl ketone, and the mixture was heated to 86-92°C while stirring. Tetrabutylammonium bromide and toluene were then added, followed by epichlorohydrin. The mixture was stirred for 3.6-4.2 hours, cooled to room temperature, and alkali solution was added dropwise. The mixture was stirred for another 0.6-0.8 hours, and alkali solution was added again. The mixture was stirred for another 1.8-2.2 hours. The mixture was then filtered under reduced pressure, washed, and dried to obtain the modified monomer. The wear-resistant coating liquid is prepared by the following steps: Mix polyurethane acrylate, functional acid ester and nano silica dispersion evenly, add photoinitiator, and ultrasonically disperse for 20-30 minutes to obtain wear-resistant coating liquid; The functional ester is prepared by the following steps: Under nitrogen protection, 2-mercaptonicotinic acid, pentaerythritol, p-toluenesulfonic acid, and 2,6-di-tert-butyl-p-cresol were added to toluene, heated to 64-70°C, stirred for 8-10 hours, cooled to room temperature, washed, and distilled under reduced pressure to obtain the functional ester.

2. The high-barrier flexible optical conductive film according to claim 1, characterized in that, The modified liquid is prepared by the following steps: Add KH-560 to an ethanol-water solution and stir until homogeneous. Then add isobornyl acrylate and continue stirring for 12-16 minutes to obtain the modified solution.

3. The high-barrier flexible optical conductive film according to claim 2, characterized in that, The mass ratio of KH-560, ethanol aqueous solution and isoborneol acrylate is 1-1.6:100-120:4.6-5.

4. The high-barrier flexible optical conductive film according to claim 1, characterized in that, The mass ratio of the polyurethane acrylate, trimethylolpropane triacrylate, 2,6-di-tert-butyl-p-cresol, KH-560, BYK-052 and ethyl acetate is 40-50:25-35:0.01-0.03:1.5-2.5:0.2-0.4:20-30.

5. The high-barrier flexible optical conductive film according to claim 1, characterized in that, The mass ratio of polyvinyl alcohol, PEDOT:PSS, 1-hydroxyethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt and modified monomer is 9-11:100:11-13:1.8-2.

2.

6. The high-barrier flexible optical conductive film according to claim 1, characterized in that, The mass ratio of the total amount of 2-allylphenol, methyl isobutyl ketone, tetrabutylammonium bromide, toluene, epichlorohydrin and alkali solution is 5-7:56-64:0.04-0.06:6-10:3.4-4:22-26.

7. The high-barrier flexible optical conductive film according to claim 1, characterized in that, The mass ratio of the polyurethane acrylate, functional acid ester, nano silica dispersion and photoinitiator is 60-70:7-9:15-25:1.6-2.

8.

8. The high-barrier flexible optical conductive film according to claim 1, characterized in that, The mass ratio of 2-mercaptonicotinic acid, pentaerythritol, p-toluenesulfonic acid, 2,6-di-tert-butyl-p-cresol, and toluene is 3.4-3.8: 6.2-6.6: 0.02-0.04: 0.01-0.014: 80-120.

9. A method for preparing a high-barrier flexible optical conductive film as described in any one of claims 1-8, comprising the following steps: Step S1: Clean the flexible polymer substrate, dry it, and then treat it with plasma to obtain a pretreated flexible polymer substrate. Step S2: Coat the modified liquid onto the surface of the pretreated flexible polymer substrate to obtain an interface modified layer; Step S3: Deposit zinc oxide on the surface of the interface modified layer using atomic layer deposition to obtain a zinc oxide layer. Coat the surface of the zinc oxide layer with a modified acrylate solution and then perform a thermosetting treatment to obtain a composite barrier layer. Step S4: Spin-coat the modified conductive liquid onto the surface of the composite barrier layer, and then perform heat preservation treatment to obtain the conductive layer; Step S5: Apply the wear-resistant coating liquid to the surface of the conductive layer, cure it with ultraviolet light to obtain the wear-resistant coating, and after cutting, obtain a high-barrier flexible optical conductive film.

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