阅读说明：本技术 一种抗静电涂布液及其制备方法和应用 (Antistatic coating liquid and preparation method and application thereof ) 是由 伊青松 孙兵 饶莎莎 王平平 于 2021-08-05 设计创作，主要内容包括：本发明提供一种抗静电涂布液及其制备方法和应用,该抗静电涂布液,按重量份计,包括以下组分：PEDOT/PSS水分散体原液：5-75份,pH值调节剂：0.05-0.75份,导电助剂：1-8份,基体树脂：5-15份,偶联剂0.05-0.5份、去离子水：1-20份,润湿流平剂：0.05-0.5份,消泡剂：0.05-0.5份,其中,基体树脂为自制。本发明的抗静电涂布液具有性能稳定、导电率高、耐溶剂、安全环保等优点,其在特定基材表面涂布干燥后表面电阻达到10～(5)-10～(6)Ω,多次醇洗后表面电阻保持在10～(6)-10～(7)Ω,没有明显的雾化现象。(The invention provides an antistatic coating liquid and a preparation method and application thereof, wherein the antistatic coating liquid comprises the following components in parts by weight: stock solutions of aqueous PEDOT/PSS dispersions: 5-75 parts of a pH value regulator: 0.05-0.75 part of conductive additive: 1-8 parts of matrix resin: 5-15 parts of coupling agent, 0.05-0.5 part of deionized water: 1-20 parts of wetting and leveling agent: 0.05-0.5 part of defoaming agent: 0.05-0.5 part of self-made matrix resin. The antistatic coating liquid has the advantages of stable performance, high conductivity, solvent resistance, safety, environmental protection and the like, and the surface resistance of the antistatic coating liquid reaches 10 after the antistatic coating liquid is coated and dried on the surface of a specific substrate 5 ‑10 6 Omega, surface resistance after multiple alcohol washes was maintained at 10 6 ‑10 7 Omega, no significant fogging.)

1. The antistatic coating liquid is characterized by comprising the following components in parts by weight: stock solutions of aqueous PEDOT/PSS dispersions: 5-75 parts of a pH value regulator: 0.05-0.75 part of conductive additive: 1-8 parts of matrix resin: 5-15 parts of coupling agent: 0.05-0.5 part of deionized water: 1-20 parts of wetting and leveling agent: 0.05-0.5 part of defoaming agent: 0.05-0.5 part;

the matrix resin is prepared by the following method: mixing the dehydrated polycarbonate diol, polytetrahydrofuran and aromatic diisocyanate according to a certain ratio, heating to 65-85 ℃, adding dimethylolpropionic acid and epoxy resin, reacting for 1-3 hours, adding propylene glycol, trimethylolpropane and acetone, reacting at 60-80 ℃ until the reaction is finished, and cooling to 50-70 ℃ to obtain a prepolymer; and adding triethylamine and water into the prepolymer, stirring for 30-50 minutes to obtain white emulsion, adding the nanoparticles, stirring for 1-3 hours, and removing the solvent to obtain the matrix resin.

2. The antistatic coating liquid as claimed in claim 1, wherein the stock solution of aqueous PEDOT/PSS dispersion has a solid content of 0.5 to 5% and a pH value at 25 ℃ of 6 to 10.

3. The antistatic coating liquid according to claim 1, wherein the pH adjuster is one or more selected from diethanolamine, triethanolamine, ethylenediamine, N-dimethylethanolamine, N-diethylethanolamine, aqueous ammonia, sodium hydroxide and potassium hydroxide.

4. The antistatic coating liquid according to claim 1, wherein the conductive auxiliary is one or two of ethylene glycol, glycerol, dimethyl sulfoxide and N-methylpyrrolidone.

5. The antistatic coating liquid of claim 1, wherein the nanoparticles are one or more of carbon nanotubes, graphene, calcium carbonate, silica and titanium dioxide.

6. The antistatic coating liquid according to claim 1, wherein the wetting and leveling agent is one or more of silicone-based, nonionic-based, and acrylic surface control agents.

7. The antistatic coating liquid according to claim 1, wherein the defoaming agent is one or more of silicone defoaming agent, nonionic defoaming agent and polyether defoaming agent.

8. The method for preparing an antistatic coating liquid according to any one of claims 1 to 7, characterized by comprising the steps of:

and mixing and stirring the PEDOT/PSS aqueous dispersion stock solution, the pH value regulator, the conductive auxiliary agent, the matrix resin, the coupling agent, the deionized water, the wetting and leveling agent and the defoaming agent to obtain the antistatic coating liquid.

9. The method for preparing an antistatic coating liquid according to claim 8, wherein the stirring rate of the mixing and stirring is 100-500 rpm, and the stirring time is 1-24 hours.

10. Use of the antistatic coating liquid according to any one of claims 1 to 7 in the antistatic industry, characterized by comprising the following steps:

coating the antistatic coating liquid on a substrate by a wire rod, and drying at the temperature of 100-140 ℃ for 0.5-1 min to obtain an antistatic PEDOT/PSS coating;

the base material is one or more of PET, PE and glass.

Technical Field

The invention relates to the technical field of antistatic coatings, and particularly relates to an antistatic coating liquid and a preparation method and application thereof.

Background

The organic conductive polymer has the performances of both traditional high molecular materials and novel semiconductor materials, and particularly, the doped PEDOT film has the characteristics of high conductivity, good light transmission, excellent thermal stability and environmental stability and the like, so that the organic conductive polymer is the novel conductive polymer which is most widely commercialized at present. The typical poly (3, 4-ethylenedioxythiophene)/polystyrene sulfonic acid (PEDOT/PSS) water-dispersible compound has important application value in the fields of solid capacitor electrode materials, antistatic coatings, electroluminescent materials, organic solar cells and the like due to good conductivity and processability.

In the production and use processes of small electronic components, surface charge accumulation is easily caused by contact friction, a high-strength electric field is formed in a local range, electrostatic discharge is generated, dust pollution or short circuit is adsorbed, and the electronic components are damaged. Thus conductive PEDOT/PSS coatings are an effective means of ensuring the quality of electronic components. This requires that the PEDOT/PSS coatings should not only have good electrical conductivity, but also have excellent mechanical friction resistance and high light transmittance, and at the same time have good alcohol washing resistance.

According to different technical requirements, PEDOT/PSS preparation technical patents with different specifications are published. The Chinese patent with the publication number of CN 102731971A discloses a preparation process of a high-conductivity PEDOT/PSS solution doped with sodium pentosan sulfate, and the product has excellent antistatic performance and high transparency. The Chinese patent with publication number CN 103865364A discloses a formula of a polythiophene antistatic coating liquid raw material, and a high-conductivity antistatic film can be obtained by drying for 10 minutes at 150 ℃ after coating on a PET substrate. The Chinese patent with the publication number of CN 106750449A discloses a preparation process of a nano-modified PEDOT/PSS antistatic coating, and the alcohol washing resistance of an antistatic coating can be improved by increasing the drying temperature and time. Most of the antistatic coating liquid preparation processes disclosed by the above patents have the defects that PEDOT/PSS aqueous dispersion needs to be prepared by self, organic reagents are high in toxicity, alcohol washing resistance is poor, curing conditions are harsh, long-term storage performance is unstable, and the like, and cannot meet specific production requirements of enterprises.

Disclosure of Invention

In view of the above, the invention aims to provide an antistatic coating liquid to solve the problems that the existing antistatic coating liquid PEDOT/PSS aqueous dispersion needs to be self-made, an organic reagent has high toxicity, poor alcohol washing resistance, harsh curing conditions and unstable long-term storage performance.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

an antistatic coating liquid comprises the following components in parts by weight: stock solutions of aqueous PEDOT/PSS dispersions: 5-75 parts of a pH value regulator: 0.05-0.75 part of conductive additive: 1-8 parts of matrix resin: 5-15 parts of coupling agent: 0.05-0.5 part of deionized water: 1-20 parts of wetting and leveling agent: 0.05-0.5 part of defoaming agent: 0.05-0.5 part;

the matrix resin is prepared by the following method: mixing the dehydrated polycarbonate diol, polytetrahydrofuran and aromatic diisocyanate according to a certain ratio, heating to 65-85 ℃, adding dimethylolpropionic acid and epoxy resin, reacting for 1-3 hours, adding propylene glycol, trimethylolpropane and acetone, reacting at 60-80 ℃ until the reaction is finished, and cooling to 50-70 ℃ to obtain a prepolymer; and adding triethylamine and water into the prepolymer, stirring for 30-50 minutes to obtain white emulsion, adding the nanoparticles, stirring for 1-3 hours, and removing the solvent to obtain the matrix resin.

Optionally, the stock solution of the aqueous PEDOT/PSS dispersion has a solids content of 0.5-5% and a pH value of 6-10 at 25 ℃.

Optionally, the pH regulator is one or more of diethanolamine, triethanolamine, ethylenediamine, N-dimethylethanolamine, N-diethylethanolamine, ammonia, sodium hydroxide, and potassium hydroxide.

Alternatively, the conductive auxiliary agent can be one or two of ethylene glycol, glycerol, dimethyl sulfoxide and N-methylpyrrolidone.

Optionally, the nanoparticle is one or more of carbon nanotube, graphene, calcium carbonate, silica, and titanium dioxide.

Optionally, the wetting and leveling agent is one or more of silicone, nonionic, and acrylic surface control agents.

Optionally, the defoaming agent is one or more of silicone defoaming agent, nonionic defoaming agent and polyether defoaming agent.

A second object of the present invention is to provide a method for preparing the above antistatic coating liquid, comprising the steps of:

and mixing and stirring the PEDOT/PSS aqueous dispersion stock solution, the pH value regulator, the conductive auxiliary agent, the matrix resin, the coupling agent, the deionized water, the wetting and leveling agent and the defoaming agent to obtain the antistatic coating liquid.

Optionally, the stirring speed of the mixing stirring is 100-500 rpm, and the stirring time is 1-24 hours.

The third purpose of the present invention is to provide an application of the antistatic coating liquid in the antistatic industry, which comprises the following steps:

coating the antistatic coating liquid on a substrate by a wire rod, and drying at the temperature of 100-140 ℃ for 0.5-1 minute to obtain a PEDOT/PSS antistatic coating for antistatic;

the base material is one or more of PET, PE and glass.

Compared with the prior art, the antistatic coating liquid has the following advantages:

1. the invention adopts commercial PEDOT/PSS aqueous dispersion stock solution, the source supply is stable, the stock solution can be used in large quantity, the raw materials of the coating liquid mostly adopt organic reagents or inorganic reagents with low toxicity, the environment-friendly effect is good, meanwhile, the antistatic coating liquid can obtain the antistatic coating liquid with high conductivity and good alcohol-washing resistance in shorter drying time, the energy source is saved, the cost is reduced, the antistatic coating liquid is more suitable for industrial production, and the surface resistance reaches 10 after the antistatic coating liquid is coated and dried on the surface of a specific base material⁵-10⁶Omega, surface resistance after multiple alcohol washes was maintained at 10⁶-10⁷Omega, no significant fogging.

2. The self-made matrix resin has certain performances of solvent resistance, friction resistance and good stability, so that the antistatic coating liquid can be stored for a long time without affecting the performances of solvent resistance, friction resistance and the like.

3. The preparation method is simple, low in cost and environment-friendly, the product can be stored for a long time, the conductivity of the coating film formed on the surface of a specific substrate is excellent, the alcohol washing resistance is good, the light transmittance is high, and the preparation method is suitable for industrial mass production.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail with reference to examples.

Example 1

The antistatic coating liquid is prepared by the following method:

1) mixing the dehydrated polycarbonate diol, polytetrahydrofuran and aromatic diisocyanate according to a certain ratio, heating to 65 ℃, adding dimethylolpropionic acid and epoxy resin, reacting for 3 hours, adding propylene glycol, trimethylolpropane and acetone, reacting at 80 ℃ until the reaction is finished, and cooling to 70 ℃ to obtain a prepolymer; adding triethylamine and water into the prepolymer, stirring for 30 minutes to obtain white emulsion, adding the carbon nano tube, stirring for 3 hours, removing the solvent to obtain matrix resin, wherein the obtained matrix resin has the performances of solvent resistance, friction resistance and good stability, can be wiped by ethanol for more than 200 times, and can be placed at room temperature for more than 6 months;

2) taking 6 parts by weight of the matrix resin in the step 1), adding 0.5 part of 5M ammonia water, gradually and sequentially dropwise adding 5.0 parts of dimethyl sulfoxide, 15 parts of PEDOT/PSS aqueous dispersion stock solution, KH 5600.5 parts of coupling agent, 0.15 part of organic silicon wetting and leveling agent, 0.15 part of polyether defoaming agent and 5 parts of deionized water, accelerating the stirring speed to 400r/min, continuously stirring to be uniform, and obtaining the antistatic coating liquid after the reaction is finished.

A small amount of PEDOT/PSS coating liquid (the antistatic coating liquid in the embodiment) is dropwise added on a PET base film, a No. 2 linear coating rod is used for rolling and forming a film, then the film is placed into a baking oven preheated to 110 ℃, is dried for 1 minute, and is subjected to high-temperature film forming, so that the PEDOT/PSS antistatic coating for preventing the static electricity of the electronic element is obtained.

The resistance of the obtained PEDOT/PSS antistatic coating was measured with a MODEL-100 resistance tester.

As shown by the test, the surface resistance value of the PEDOT/PSS antistatic coating obtained in the embodiment is 10⁶～10⁷Omega, and the surface of the film is uniform and transparent without atomization phenomenon.

The PEDOT/PSS antistatic coating obtained in this example was subjected to an alcohol wash resistance test, which specifically includes the following steps: the surface of the film-forming substrate was soaked with ethanol using absorbent cotton, then wiped continuously 200 times or more, and again placed in the oven under the above conditions to be dried for 30 seconds, and then the surface resistance value of the film was measured with a MODEL-100 resistance tester.

As shown by tests, the surface resistance value of the PEDOT/PSS antistatic coating obtained in the embodiment after being subjected to alcohol washing treatment is 10⁷～10⁸Omega, the film surface is uniform and transparent, and the atomization phenomenon is avoided.

Example 2

The antistatic coating liquid is prepared by the following method:

1) mixing the dehydrated polycarbonate diol, polytetrahydrofuran and aromatic diisocyanate according to a certain ratio, heating to 70 ℃, adding dimethylolpropionic acid and epoxy resin, reacting for 2 hours, adding propylene glycol, trimethylolpropane and acetone, reacting at 70 ℃ until the reaction is finished, and cooling to 60 ℃ to obtain a prepolymer; adding triethylamine and water into the prepolymer, stirring for 40 minutes to obtain white emulsion, adding nano graphene and calcium carbonate, stirring for 3 hours, removing the solvent to obtain matrix resin, wherein the obtained matrix resin has the performances of solvent resistance, friction resistance and good stability, can be wiped by ethanol for more than 200 times, and can be placed at room temperature for more than 6 months;

2) taking 6 parts by weight of the matrix resin in the step 1), adding 0.25 part of N, N-dimethylethanolamine, gradually and sequentially dropwise adding 3.5 parts of dimethyl sulfoxide, 5 parts of PEDOT/PSS aqueous dispersion stock solution, KH 5600.5 parts of coupling agent, 0.16 part of organic silicon wetting and leveling agent, 0.16 part of polyether defoaming agent and 6 parts of deionized water, accelerating the stirring speed to 400r/min, continuously stirring to be uniform, and obtaining the antistatic coating liquid after the reaction is finished.

A small amount of PEDOT/PSS coating liquid (the antistatic coating liquid in the embodiment) is taken and dripped on a PET base film, a No. 2 linear coating rod is used for rolling and forming a film, then the film is placed in a baking oven preheated to 120 ℃, the drying is carried out for 0.5 minute, and the high-temperature film forming is carried out, so that the PEDOT/PSS antistatic coating for preventing the static electricity of the electronic element is obtained.

The resistance of the obtained PEDOT/PSS antistatic coating was measured with a MODEL-100 resistance tester.

As shown by the test, the surface resistance value of the PEDOT/PSS antistatic coating obtained in the embodiment is 10⁵～10⁶Omega, and the surface of the film is uniform and transparent, and the atomization phenomenon can not be observed.

The PEDOT/PSS antistatic coating obtained in this example was subjected to an alcohol wash resistance test, which specifically includes the following steps: the surface of the film-forming substrate was soaked with absorbent cotton in ethanol, wiped continuously 200 times or more, placed again in the oven under the above conditions and dried for 30 seconds, and then the surface resistance of the film was measured with a MODEL-100 resistance tester.

As shown by tests, the surface resistance value of the PEDOT/PSS antistatic coating obtained in the embodiment after being subjected to alcohol washing treatment is 10⁶～10⁷Omega, the film surface is uniform and transparent, and the atomization phenomenon cannot be observed.

Example 3

The antistatic coating liquid is prepared by the following method:

1) mixing the dehydrated polycarbonate diol, polytetrahydrofuran and aromatic diisocyanate according to a certain proportion, heating to 65 ℃, adding dimethylolpropionic acid and epoxy resin, reacting for 1.5 hours, adding propylene glycol, trimethylolpropane and acetone, reacting at 60 ℃ until the reaction is finished, and cooling to 50 ℃ to obtain a prepolymer; adding triethylamine and water into the prepolymer, stirring for 30 minutes to obtain white emulsion, adding the carbon nano tube and silicon dioxide, stirring for 3 hours, removing the solvent to obtain matrix resin, wherein the obtained matrix resin has the performances of solvent resistance, friction resistance and good stability, can be wiped by ethanol for more than 200 times, and can be placed at room temperature for more than 6 months;

2) taking 6 parts by weight of the matrix resin in the step 1), adding 0.5 part of 5M ammonia water, gradually and sequentially dropwise adding 3.0 parts of dimethyl sulfoxide, 8 parts of PEDOT/PSS aqueous dispersion stock solution, 1.0 part of KH 560 coupling agent, 0.16 part of organic silicon wetting and leveling agent, 0.16 part of polyether defoaming agent and 3.0 parts of deionized water, accelerating the stirring speed to 400r/min, continuously stirring to be uniform, and obtaining the antistatic coating liquid after the reaction is finished.

A small amount of PEDOT/PSS coating liquid (the antistatic coating liquid in the embodiment) is dropwise added on a PET base film, a No. 2 linear coating rod is used for rolling and forming a film, then the film is placed in a baking oven preheated to 120 ℃, is dried for 1 minute, and is subjected to high-temperature film forming, so that the PEDOT/PSS antistatic coating for preventing the static electricity of the electronic element is obtained.

The resistance of the obtained PEDOT/PSS antistatic coating was measured with a MODEL-100 resistance tester.

As shown by the test, the surface resistance value of the PEDOT/PSS antistatic coating obtained in the embodiment is 10⁵～10⁶Omega. The film surface is uniform and transparent, and has no atomization phenomenon.

The PEDOT/PSS antistatic coating obtained in this example was subjected to an alcohol wash resistance test, which specifically includes the following steps: the surface of the film-forming substrate was soaked with absorbent cotton in ethanol, wiped continuously 200 times or more, placed again in the oven under the above conditions and dried for 30 seconds, and then the surface resistance of the film was measured with a MODEL-100 resistance tester.

As shown by tests, the surface resistance value of the PEDOT/PSS antistatic coating obtained in the embodiment after being subjected to alcohol washing treatment is 10⁶～10⁷Omega, the film surface is uniform and transparent, and the atomization phenomenon is avoided.

Example 4

The antistatic coating liquid is prepared by the following method:

1) mixing the dehydrated polycarbonate diol, polytetrahydrofuran and aromatic diisocyanate according to a certain ratio, heating to 70 ℃, adding dimethylolpropionic acid and epoxy resin, reacting for 1 hour, adding propylene glycol, trimethylolpropane and acetone, reacting at 70 ℃ until the reaction is finished, and cooling to 70 ℃ to obtain a prepolymer; adding triethylamine and water into the prepolymer, stirring for 30 minutes to obtain white emulsion, adding titanium dioxide, stirring for 2 hours, removing the solvent to obtain matrix resin, wherein the obtained matrix resin has the performances of solvent resistance, friction resistance and good stability, can be wiped by ethanol for more than 200 times, and can be placed at room temperature for more than 6 months;

2) taking 6 parts by weight of the matrix resin in the step 1), adding 0.5 part of 5M ammonia water, gradually and sequentially dropwise adding 3.0 parts of dimethyl sulfoxide, 15 parts of PEDOT/PSS aqueous dispersion stock solution, 1.5 parts of KH 560 coupling agent, 0.2 part of organic silicon wetting and leveling agent, 0.2 part of polyether defoaming agent, 5 parts of deionized water and 3 parts of N-methylpyrrolidone, accelerating the stirring speed to 500r/min, continuously stirring to be uniform, and obtaining the antistatic coating liquid after the reaction is finished.

A small amount of PEDOT/PSS coating liquid (the antistatic coating liquid in the embodiment) is dropwise added on a PET base film, a No. 2 linear coating rod is used for rolling and forming a film, then the film is placed in a baking oven preheated to 120 ℃, is dried for 1 minute, and is subjected to high-temperature film forming, so that the PEDOT/PSS antistatic coating for preventing the static electricity of the electronic element is obtained.

The resistance of the obtained PEDOT/PSS antistatic coating was measured with a MODEL-100 resistance tester.

As shown by the test, the surface resistance value of the PEDOT/PSS antistatic coating obtained in the embodiment is 10⁶～10⁷Omega, and the surface of the film is uniform and transparent without atomization phenomenon.

The PEDOT/PSS antistatic coating obtained in this example was subjected to an alcohol wash resistance test, which specifically includes the following steps: the surface of the film-forming substrate was soaked with absorbent cotton in ethanol, wiped continuously 200 times or more, placed again in the oven under the above conditions and dried for 30 seconds, and then the surface resistance of the film was measured with a MODEL-100 resistance tester.

As shown by tests, the surface resistance value of the PEDOT/PSS antistatic coating obtained in the embodiment after being subjected to alcohol washing treatment is 10⁸～10⁹Omega, the film surface is uniform and transparent, and the atomization phenomenon is avoided.

Comparative example 1

The antistatic coating liquid is prepared by the following method:

according to the weight portion, 6 portions of commercial aqueous polyacrylic resin is taken, 0.5 portion of 5M ammonia water is added, then 5.0 portions of dimethyl sulfoxide, 15 portions of PEDOT/PSS aqueous dispersion stock solution, 0.5 portion of KH 560 coupling agent, 0.15 portion of organic silicon wetting and leveling agent, 0.15 portion of polyether defoaming agent and 5 portions of deionized water are gradually and sequentially added in a dropwise manner, the stirring speed is increased to 400r/min, the stirring is continuously carried out until the uniform stirring is achieved, and after the reaction is finished, the antistatic coating liquid is obtained.

And (3) dropwise adding a small amount of PEDOT/PSS coating liquid (the antistatic coating liquid of the comparative example) on the PET base film, rolling by using a No. 2 linear coating rod to form a film, then putting the film into a baking oven preheated to 110 ℃, drying for 1 minute, and forming a film at a high temperature to obtain the PEDOT/PSS antistatic coating for preventing the static electricity of the electronic element.

The resistance of the obtained PEDOT/PSS antistatic coating was measured with a MODEL-100 resistance tester.

As shown by tests, the surface resistance value of the PEDOT/PSS antistatic coating obtained by the comparative example is 10⁷～10⁸Omega, and the surface of the film is uniform and transparent without atomization phenomenon.

The PEDOT/PSS antistatic coating obtained by the comparative example is subjected to an alcohol washing resistance test, and the specific test method comprises the following steps: the surface of the film-forming substrate was soaked with absorbent cotton in ethanol, wiped continuously 200 times or more, placed again in the oven under the above conditions and dried for 30 seconds, and then the surface resistance of the film was measured with a MODEL-100 resistance tester.

Tests show that the surface resistance value of the PEDOT/PSS antistatic coating obtained by the comparative example after alcohol washing treatment exceeds 10¹¹Omega, and the film surface has scratch and fog phenomena.

After the coating, the coating film was heated in an oven at 110 ℃ for 20 minutes, and the surface resistance of the film was measured to be 10 after curing and film formation⁶～10⁷Omega, the film surface is uniform and transparent without atomization. After the film is washed with alcohol and wiped for 200 times and dried for 0.5 minute, the surface resistance value of the film is 10⁷～10⁸Omega, no scratch and fogging phenomena.

Comparative example 2

The antistatic coating liquid is prepared by the following method:

according to the weight portion, 6 portions of commercial water-based polycarbonate polyurethane resin is taken, 0.25 portion of N, N-dimethylethanolamine is added, then 3.5 portions of dimethyl sulfoxide, 5 portions of PEDOT/PSS aqueous dispersion stock solution, 0.5 portion of KH 560 coupling agent, 0.16 portion of organic silicon wetting and leveling agent, 0.16 portion of polyether defoaming agent and 6 portions of deionized water are gradually and sequentially added in a dropwise manner, the stirring speed is increased to 400r/min, the stirring is continuously carried out until the uniform stirring is realized, and after the reaction is finished, the antistatic coating liquid is obtained.

And (3) dropwise adding a small amount of PEDOT/PSS coating liquid (the antistatic coating liquid of the comparative example) on the PET base film, rolling by using a No. 2 linear coating rod to form a film, then putting the film into a baking oven preheated to 120 ℃, drying for 1 minute, and forming a film at a high temperature to obtain the PEDOT/PSS antistatic coating for preventing the static electricity of the electronic element.

The resistance of the obtained PEDOT/PSS antistatic coating was measured with a MODEL-100 resistance tester.

As shown by tests, the surface resistance value of the PEDOT/PSS antistatic coating obtained by the comparative example is 10⁶～10⁷Omega, and the surface of the film is uniform and transparent without atomization phenomenon.

The PEDOT/PSS antistatic coating obtained by the comparative example is subjected to an alcohol washing resistance test, and the specific test method comprises the following steps: the surface of the film-forming substrate was soaked with absorbent cotton in ethanol, wiped continuously 200 times or more, placed again in the oven under the above conditions and dried for 30 seconds, and then the surface resistance of the film was measured with a MODEL-100 resistance tester.

Tests show that the surface resistance value of the PEDOT/PSS antistatic coating obtained by the comparative example after alcohol washing treatment exceeds 10¹⁰Omega, and the film surface has scratch and fog phenomena.

After the coating, the coating film was heated in an oven at 120 ℃ for 15 minutes, and the surface resistance of the film was measured to be 10 after curing and film formation⁵～10⁶Omega, the film surface is uniform and transparent without atomization. After the film is washed with alcohol and wiped for 200 times and dried for 0.5 minute, the surface resistance value of the film is 10⁶～10⁷Omega, no scratch and fogging phenomena.

Comparative example 3

The antistatic coating liquid is prepared by the following method:

according to the weight portion, 4 portions of commercial water-based polycarbonate polyurethane resin and 2 portions of matrix resin prepared in the embodiment 1 are taken, 0.5 portion of 5M ammonia water is added, then 5.0 portions of dimethyl sulfoxide, 15 portions of PEDOT/PSS aqueous dispersion stock solution, 0.5 portion of KH 560 coupling agent, 0.15 portion of organic silicon wetting and leveling agent, 0.15 portion of polyether defoaming agent and 5 portions of deionized water are gradually and sequentially dripped, the stirring speed is accelerated to 400r/min, the stirring is continuously carried out until the uniform stirring is achieved, and after the reaction is finished, the antistatic coating liquid is obtained.

And (3) dropwise adding a small amount of PEDOT/PSS coating liquid (the antistatic coating liquid of the comparative example) on the PET base film, rolling by using a No. 2 linear coating rod to form a film, then putting the film into a baking oven preheated to 140 ℃, drying for 1 minute, and forming a film at a high temperature to obtain the PEDOT/PSS antistatic coating for preventing the static electricity of the electronic element.

The resistance of the obtained PEDOT/PSS antistatic coating was measured with a MODEL-100 resistance tester.

As shown by tests, the surface resistance value of the PEDOT/PSS antistatic coating obtained by the comparative example is 10⁶～10⁷Omega, and the surface of the film is uniform and transparent without atomization phenomenon.

The PEDOT/PSS antistatic coating obtained by the comparative example is subjected to an alcohol washing resistance test, and the specific test method comprises the following steps: the surface of the film-forming substrate was soaked with absorbent cotton in ethanol, wiped continuously 200 times or more, placed again in the oven under the above conditions and dried for 30 seconds, and then the surface resistance of the film was measured with a MODEL-100 resistance tester.

Tests show that the surface resistance value of the PEDOT/PSS antistatic coating obtained by the comparative example after alcohol washing treatment exceeds 10¹⁰Omega, and the film surface has scratch and fog phenomena.

After the coating, the coating film was heated in an oven at 140 ℃ for 10 minutes, and the surface resistance of the film was measured to be 10 after curing and film formation⁶～10⁷Omega, the film surface is uniform and transparent without atomization. After the film is washed with alcohol and wiped for 200 times and dried for 0.5 minute, the surface resistance value of the film is 10⁷～10⁸Omega, no scratch and fogging phenomena.

It should be noted that the stock solutions of aqueous PEDOT/PSS dispersions used in the examples and comparative examples according to the invention have a solids content of 0.5-5% and a pH value of 6-10 at 25 ℃.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.