阅读说明：本技术 一种柔性纳米触控膜的制备方法 (Preparation method of flexible nano touch film ) 是由 司荣美 刘彩风 李�杰 于 2020-12-18 设计创作，主要内容包括：本发明是一种柔性纳米触控膜的制备方法,先对基材进行清洗,再制作有机硅薄膜,在有机硅薄膜上进行印刷刻画,利用渗透发泡液发泡形成导线槽,再将银浆溶液倒入导线槽内,微蒸处理形成导电网络,再涂覆一层光学胶,得到纳米触控膜。本发明由于不需要在玻璃盖板等基板上进行ITO的溅射和刻蚀,简化了工艺流程,制备方法简单,保证了成品良率,解决了传统方式银浆与纳米线不能有效导通方面的问题,同时确保在柔性基材上的结合力；本发明采用微蒸发泡为主,能够良好填补效果,能够填补缺陷问题,能够大大光电传导性；本发明采用通过钛酸正丁酯对银浆溶液进行混合改性,大大提高了普通银导丝的损耗,大大提高了导电感应膜的传导性能。(The invention relates to a preparation method of a flexible nanometer touch control film, which comprises the steps of cleaning a base material, manufacturing an organic silicon film, printing and engraving on the organic silicon film, foaming by utilizing a permeable foaming liquid to form a wire groove, pouring a silver paste solution into the wire groove, carrying out micro-steaming treatment to form a conductive network, and coating a layer of optical adhesive to obtain the nanometer touch control film. According to the invention, ITO sputtering and etching are not required to be carried out on substrates such as a glass cover plate, the process flow is simplified, the preparation method is simple, the yield of finished products is ensured, the problem that silver paste and nanowires cannot be effectively conducted in the traditional mode is solved, and meanwhile, the binding force on a flexible substrate is ensured; the invention mainly adopts micro-steaming foaming, can well fill up the effect, can fill up the defect problem and can greatly improve photoelectric conductivity; according to the invention, the silver paste solution is modified by mixing with n-butyl titanate, so that the loss of a common silver guide wire is greatly improved, and the conductivity of the conductive induction film is greatly improved.)

1. A preparation method of a flexible nanometer touch film is characterized by comprising the following steps:

step 1, soaking a base material into an alcohol solution, and cleaning and drying the base material by using distilled water after ultrasonic cleaning;

step 2, coating organic silicon liquid on the upper end of the foaming film to form an organic silicon film;

step 3, printing and engraving on the organic silicon film to form a wire network diagram, and coating the surface wire lines with a permeable foaming liquid;

step 4, placing the organic silicon film coated with the permeable foaming liquid in the step 3 into an oven for micro-thermal foaming to form a wire groove;

step 5, pouring mixed silver paste solution in the wire groove, obtaining a wire network layer by adopting a circulating micro-vibration ultrasonic method, and carrying out micro-evaporation treatment to obtain a conductive network with a nano structure;

and 6, coating a layer of optical cement on the surface of the nanowire network, and drying to obtain the nano touch film.

2. The preparation method of the flexible nano touch film according to claim 1, wherein in the step 1, the alcohol solution is one of ethanol, propanol and isopropanol, the ultrasonic frequency is 40kHz, and the ultrasonic time is 20 min.

3. The method for preparing the flexible nanometer touch film according to claim 1, wherein the organic silicon solution in the step 2 is an ethyl acetate solution of modified organic silicon resin, and the capacity of the modified organic silicon resin is 11-15%.

4. The method for preparing a flexible nano touch film according to claim 1, wherein the coating amount in the step 2 is 1-7mL/cm²The coating reaction temperature is 70-80 deg.C.

5. The method for preparing a flexible nano touch film according to claim 1, wherein the printing in the step 3 is performed by using a wire die, that is, a scratch is formed on the surface of the silicone film by using a blade.

6. The preparation method of the flexible nanometer touch film according to claim 1, wherein the penetrating foaming liquid in the step 3 is an ethanol solution of diazoaminobenzene and fatty alcohol-polyoxyethylene ether, and the coating amount is 5-19mL/cm²。

7. The preparation method of the flexible nano touch film according to claim 1, wherein the mixed silver paste solution in the step 5 is composed of 3 parts by weight of n-butyl titanate, 12 parts by weight of silver nitrate, 10 parts by weight of alkaline powder and 35 parts by weight of alcohol solution.

8. The method for preparing a flexible nano touch film according to claim 7, wherein the alkaline powder is sodium hydroxide, and the alcohol solution is propanol.

9. The method for preparing a flexible nano touch film according to claim 1, wherein the micro-steaming treatment in the step 5 is to slightly heat the bottom, and the heating temperature is not higher than 80 ℃.

10. The method for preparing a flexible nano touch film according to claim 1, wherein the coating thickness of the optical adhesive in the step 6 is less than 1 μm, and the drying temperature is 40-60 ℃.

Technical Field

The invention relates to the technical field of touch control film production, in particular to a preparation method of a flexible nanometer touch control film.

Background

The nanometer touch control film is an induction film mainly used for packaging nanometer wires, integrates multiple functions of accurate induction positioning, flexibility, high transparency and the like, is used for accurate touch control positioning of a touch control screen of more than 10 inches, and is also applied to accurate interactive projection and security positioning. At present, the equipment that can independent complete large-scale production nanometer touch membrane still does not exist in the market, and its production still is in the lab scale stage, and its equipment and instruments are mostly experimental precision equipment, and the price is expensive, and manufacturing cost is high, and secondly, because the limitation of equipment, operating procedure is more complicated, and assembly line production is difficult, extravagant manpower and materials, and the yield is difficult to control. Moreover, the international existing ITO conductive film has small size and low transparency, and the product is monopolized by foreign industries, so that the international competitiveness of touch screen enterprises in China is seriously influenced, however, the ordinary nano touch film adopts a PET film, but the effect of the ordinary nano touch film cannot achieve good and rapid conduction, and simultaneously, a large potential energy difference is brought, and loss is brought.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a preparation method of a flexible nanometer touch control film.

In order to achieve the purpose, the invention adopts the following technical scheme: a preparation method of a flexible nanometer touch film is characterized by comprising the following steps:

step 1, soaking a base material into an alcohol solution, and cleaning and drying the base material by using distilled water after ultrasonic cleaning;

step 2, coating organic silicon liquid on the upper end of the base material to form an organic silicon film;

step 3, printing and engraving on the organic silicon film to form a wire network diagram, and coating the surface wire lines with a permeable foaming liquid;

step 4, placing the organic silicon film coated with the permeable foaming liquid in the step 3 into an oven for micro-thermal foaming to form a wire groove;

step 5, pouring mixed silver paste solution in the wire groove, obtaining a wire network layer by adopting a circulating micro-vibration ultrasonic method, and carrying out micro-evaporation treatment to obtain a conductive network with a nano structure;

and 6, coating a layer of optical cement on the surface of the nanowire network, and drying to obtain the nano touch film.

In the step 1, the alcoholic solution is one of ethanol, propanol and isopropanol, the ultrasonic frequency is 40kHz, and the ultrasonic time is 20 min.

The organic silicon liquid in the step 2 adopts ethyl acetate solution of modified organic silicon resin, and the capacity of the modified organic silicon resin is 11-15%.

The coating amount in the step 2 is 1-7mL/cm²The coating reaction temperature is 70-80 deg.C.

And 3, printing and engraving in the step 3 by adopting a wire die, namely, forming scratches on the surface of the organic silicon film by adopting a blade.

The penetrating foaming liquid in the step 3 is an ethanol solution of diazoaminobenzene and fatty alcohol-polyoxyethylene ether, and the brushing amount is 5-19mL/cm²。

And 5, the mixed silver paste solution consists of 3 parts by weight of n-butyl titanate, 12 parts by weight of silver nitrate, 10 parts by weight of alkaline powder and 35 parts by weight of alcohol solution.

The alkaline powder is sodium hydroxide, and the alcohol solution is propanol.

The micro-steaming treatment in the step 5 is to slightly heat the bottom, wherein the heating temperature is not higher than 80 ℃.

In the step 6, the coating thickness of the optical cement is less than 1 mu m, and the drying temperature is 40-60 ℃.

The invention has the beneficial effects that: according to the invention, ITO sputtering and etching are not required to be carried out on substrates such as a glass cover plate, the process flow is simplified, the preparation method is simple, the yield of finished products is ensured, the problem that silver paste and nanowires cannot be effectively conducted in the traditional mode is solved, and meanwhile, the binding force on a flexible substrate is ensured; the invention mainly adopts micro-steaming foaming, can well fill up the effect, can fill up the defect problem and can greatly improve photoelectric conductivity; according to the invention, the silver paste solution is modified by mixing with n-butyl titanate, so that the loss of a common silver guide wire is greatly improved, and the conductivity of the conductive induction film is greatly improved.

Detailed Description

The invention will be further illustrated with reference to specific examples:

a preparation method of a flexible nanometer touch film is characterized by comprising the following steps:

step 1, soaking a base material into an alcohol solution, and cleaning and drying the base material by using distilled water after ultrasonic cleaning;

step 2, coating organic silicon liquid on the upper end of the base material to form an organic silicon film;

step 3, printing and engraving on the organic silicon film to form a wire network diagram, and coating the surface wire lines with a permeable foaming liquid;

step 4, placing the organic silicon film coated with the permeable foaming liquid in the step 3 into an oven for micro-thermal foaming to form a wire groove;

step 5, pouring mixed silver paste solution in the wire groove, obtaining a wire network layer by adopting a circulating micro-vibration ultrasonic method, and carrying out micro-evaporation treatment to obtain a conductive network with a nano structure;

and 6, coating a layer of optical cement on the surface of the nanowire network, and drying to obtain the nano touch film.

In the step 1, the alcoholic solution is one of ethanol, propanol and isopropanol, the ultrasonic frequency is 40kHz, and the ultrasonic time is 20 min.

The organic silicon liquid in the step 2 adopts ethyl acetate solution of modified organic silicon resin, and the capacity of the modified organic silicon resin is 11-15%.

The coating amount in the step 2 is 1-7mL/cm²The coating reaction temperature is 70-80 deg.C.

And 3, printing and engraving in the step 3 by adopting a wire die, namely, forming scratches on the surface of the organic silicon film by adopting a blade.

The penetrating foaming liquid in the step 3 is an ethanol solution of diazoaminobenzene and fatty alcohol-polyoxyethylene ether, and the brushing amount is 5-19mL/cm²。

And 5, the mixed silver paste solution consists of 3 parts by weight of n-butyl titanate, 12 parts by weight of silver nitrate, 10 parts by weight of alkaline powder and 35 parts by weight of alcohol solution.

The alkaline powder is sodium hydroxide, and the alcohol solution is propanol.

The micro-steaming treatment in the step 5 is to slightly heat the bottom, wherein the heating temperature is not higher than 80 ℃.

In the step 6, the coating thickness of the optical cement is less than 1 mu m, and the drying temperature is 40-60 ℃.

Example 1

A preparation method of a flexible nanometer touch film is characterized by comprising the following steps:

step 1, soaking a base material into an alcohol solution, and cleaning and drying the base material by using distilled water after ultrasonic cleaning;

step 2, coating organic silicon liquid on the upper end of the base material to form an organic silicon film;

step 3, printing and engraving on the organic silicon film to form a wire network diagram, and coating the surface wire lines with a permeable foaming liquid;

step 4, placing the organic silicon film coated with the permeable foaming liquid in the step 3 into an oven for micro-thermal foaming to form a wire groove;

step 5, pouring mixed silver paste solution in the wire groove, obtaining a wire network layer by adopting a circulating micro-vibration ultrasonic method, and carrying out micro-evaporation treatment to obtain a conductive network with a nano structure;

and 6, coating a layer of optical cement on the surface of the nanowire network, and drying to obtain the nano touch film.

In the step 1, the alcoholic solution is one of ethanol, propanol and isopropanol, the ultrasonic frequency is 40kHz, and the ultrasonic time is 20 min.

The organic silicon liquid in the step 2 adopts ethyl acetate solution of modified organic silicon resin, and the capacity of the modified organic silicon resin is 11%.

The coating amount in step 2 was 1mL/cm²The coating reaction temperature was 70 ℃ heating.

And 3, printing and engraving in the step 3 by adopting a wire die, namely, forming scratches on the surface of the organic silicon film by adopting a blade.

The penetrating foaming liquid in the step 3 is an ethanol solution of diazoaminobenzene and fatty alcohol-polyoxyethylene ether, and the brushing amount is 5mL/cm²。

And 5, the mixed silver paste solution consists of 3 parts by weight of n-butyl titanate, 12 parts by weight of silver nitrate, 10 parts by weight of alkaline powder and 35 parts by weight of alcohol solution.

The alkaline powder is sodium hydroxide, and the alcohol solution is propanol.

The micro-steaming treatment in the step 5 is to slightly heat the bottom, wherein the heating temperature is not higher than 80 ℃.

In the step 6, the coating thickness of the optical cement is less than 1 mu m, and the drying temperature is 40 ℃.

Example 2

A preparation method of a flexible nanometer touch film is characterized by comprising the following steps:

step 1, soaking a base material into an alcohol solution, and cleaning and drying the base material by using distilled water after ultrasonic cleaning;

step 2, coating organic silicon liquid on the upper end of the base material to form an organic silicon film;

step 3, printing and engraving on the organic silicon film to form a wire network diagram, and coating the surface wire lines with a permeable foaming liquid;

step 4, placing the organic silicon film coated with the permeable foaming liquid in the step 3 into an oven for micro-thermal foaming to form a wire groove;

step 5, pouring mixed silver paste solution in the wire groove, obtaining a wire network layer by adopting a circulating micro-vibration ultrasonic method, and carrying out micro-evaporation treatment to obtain a conductive network with a nano structure;

and 6, coating a layer of optical cement on the surface of the nanowire network, and drying to obtain the nano touch film.

In the step 1, the alcoholic solution is one of ethanol, propanol and isopropanol, the ultrasonic frequency is 40kHz, and the ultrasonic time is 20 min.

The organic silicon liquid in the step 2 adopts ethyl acetate solution of modified organic silicon resin, and the capacity of the modified organic silicon resin is 15%.

The coating amount in step 2 was 7mL/cm²The coating reaction temperature was 80 ℃.

And 3, printing and engraving in the step 3 by adopting a wire die, namely, forming scratches on the surface of the organic silicon film by adopting a blade.

The penetrating foaming liquid in the step 3 is an ethanol solution of diazoaminobenzene and fatty alcohol-polyoxyethylene ether, and the brushing amount is 19mL/cm²。

And 5, the mixed silver paste solution consists of 3 parts by weight of n-butyl titanate, 12 parts by weight of silver nitrate, 10 parts by weight of alkaline powder and 35 parts by weight of alcohol solution.

The alkaline powder is sodium hydroxide, and the alcohol solution is propanol.

The micro-steaming treatment in the step 5 is to slightly heat the bottom, wherein the heating temperature is not higher than 80 ℃.

In the step 6, the coating thickness of the optical cement is less than 1 mu m, and the drying temperature is 60 ℃.

Example 3

A preparation method of a flexible nanometer touch film is characterized by comprising the following steps:

step 1, soaking a base material into an alcohol solution, and cleaning and drying the base material by using distilled water after ultrasonic cleaning;

step 2, coating organic silicon liquid on the upper end of the base material to form an organic silicon film;

step 3, printing and engraving on the organic silicon film to form a wire network diagram, and coating the surface wire lines with a permeable foaming liquid;

step 4, placing the organic silicon film coated with the permeable foaming liquid in the step 3 into an oven for micro-thermal foaming to form a wire groove;

step 5, pouring mixed silver paste solution in the wire groove, obtaining a wire network layer by adopting a circulating micro-vibration ultrasonic method, and carrying out micro-evaporation treatment to obtain a conductive network with a nano structure;

and 6, coating a layer of optical cement on the surface of the nanowire network, and drying to obtain the nano touch film.

In the step 1, the alcoholic solution is one of ethanol, propanol and isopropanol, the ultrasonic frequency is 40kHz, and the ultrasonic time is 20 min.

The organic silicon liquid in the step 2 adopts ethyl acetate solution of modified organic silicon resin, and the capacity of the modified organic silicon resin is 13%.

The coating amount in step 2 was 6mL/cm²The coating reaction temperature was 75 ℃.

And 3, printing and engraving in the step 3 by adopting a wire die, namely, forming scratches on the surface of the organic silicon film by adopting a blade.

The penetrating foaming liquid in the step 3 is an ethanol solution of diazoaminobenzene and fatty alcohol-polyoxyethylene ether, and the brushing amount is 11mL/cm²。

And 5, the mixed silver paste solution consists of 3 parts by weight of n-butyl titanate, 12 parts by weight of silver nitrate, 10 parts by weight of alkaline powder and 35 parts by weight of alcohol solution.

The alkaline powder is sodium hydroxide, and the alcohol solution is propanol.

The micro-steaming treatment in the step 5 is to slightly heat the bottom, wherein the heating temperature is not higher than 80 ℃.

In the step 6, the coating thickness of the optical cement is less than 1 mu m, and the drying temperature is 50 ℃.

The present invention has been described in connection with the specific embodiments, and it is obvious that the specific implementation of the present invention is not limited by the above-mentioned manner, and it is within the protection scope of the present invention as long as various modifications are made by using the method concept and technical solution of the present invention, or the present invention is directly applied to other occasions without modification.