Method for manufacturing flexible material having surface protecting layer

Patent metadata

Field	Value
Publication number	US-11059204-B2
Application number	US-201815775005-A
Country	US
Kind code	B2
Filing date	Mar 16, 2018
Priority date	Feb 27, 2018
Publication date	Jul 13, 2021
Grant date	Jul 13, 2021

Abstract

According to the present disclosure, a plurality of aluminum oxide nanoparticles and a polymerizable monomer are dissolved in a polyimide solution to obtain a polyimide mixed solution. Next, the polyimide mixed solution is coated onto a glass substrate. Then, the surface of the glass substrate is irradiated with UV light to form a network polymer on the surface of the glass substrate, the network polymer enclosing the aluminum oxide nanoparticles. Finally, the glass substrate is heated to form the flexible material having the surface protecting layer. Abrasion resistance of the flexible material manufactured according to the present disclosure is excellent.

First claim

What is claimed is:

1. A method for manufacturing a flexible material having a surface protecting layer, comprising:
dissolving and uniformly mixing a plurality of aluminum oxide nanoparticles and a polymerizable monomer into a polyimide solution to obtain a polyimide mixed solution, wherein the polymerizable monomer includes acrylamide-based acrylate and derivatives thereof;
coating the polyimide mixed solution onto a glass substrate, such that the aluminum oxide nanoparticles are uniformly distributed on a surface of the glass substrate;
irradiating the surface of the glass substrate with UV light to form a network polymer on the surface of the glass substrate, the network polymer enclosing the aluminum oxide nanoparticles; and
heating the glass substrate to form the flexible material having the surface protecting layer, wherein heating the glass substrate to form the flexible material having the surface protecting layer includes:
heating the glass substrate at 100-120° C. for 5-10 minutes;
heating the glass substrate at 200-250° C. for 20-60 minutes; and
heating the glass substrate at 300-350° C. for 5-15 minutes.

2. The method for manufacturing the flexible material having the surface protecting layer according to claim 1 , wherein the polymerizable monomer has a general formula of Sa-Sp-Sb,
Sa is

wherein R is H or CH 3 —(CH 2 ) n —, n is an integer of 1-8, and one or more H of CH 3 —(CH 2 ) n —can be replaced by F;
Sp is —(CH 2 ) n —, wherein n is an integer of 1-5, and when n=2, 3, 4, or 5, one CH 2 of —(CH 2 ) n —can be replaced by —O—, —S—, —CO—, —CO—O—, —O—CO—, —O—CO—O—, —OCH 2 —, —CH 2 O—, —CH═CH—, —CF═CF—, —C≡C—, —CH═CH—COO—, or —OCO—CH═CH—; and
Sb is

wherein R is H or CH 3 —(CH 2 ) n —, n is an integer of 1-8, and one or more H of CH 3 —(CH 2 ) n —can be replaced by F.

3. The method for manufacturing the flexible material having the surface protecting layer according to claim 2 , wherein the polymerizable monomer is

4. The method for manufacturing the flexible material having the surface protecting layer according to claim 1 , wherein an irradiation energy of the UV light is 85-100 mW/cm 2 , and an irradiation duration of the UV light is 10-60 minutes.

5. The method for manufacturing the flexible material having the surface protecting layer according to claim 1 , wherein before dissolving and uniformly mixing the aluminum oxide nanoparticles and the polymerizable monomer into the polyimide solution to obtain the polyimide mixed solution, the method further comprises:
dissolving one or more dianhydride monomers and one or more diamine monomers into an organic solvent selected from N-methyl-pyrrolidone, N-ethylpyrrolidine, γ-hexalactone, dimethyl sulfoxide, or dichloromethane to obtain a polyimide solution.

6. The method for manufacturing the flexible material having the surface protecting layer according to claim 1 , wherein after heating the glass substrate to form the flexible material having the surface protecting layer, the method further comprises:
separating the glass substrate from the flexible material having the surface protecting layer.

7. The method for manufacturing the flexible material having the surface protecting layer according to claim 6 , wherein separating the glass substrate from the flexible material having the surface protecting layer is implemented by a laser or a mechanical separation method.

8. A method for manufacturing a flexible material having a surface protecting layer, comprising:
dissolving and uniformly mixing a plurality of aluminum oxide nanoparticles and a polymerizable monomer into a polyimide solution to obtain a polyimide mixed solution;
coating the polyimide mixed solution onto a glass substrate, such that the aluminum oxide nanoparticles are uniformly distributed on a surface of the glass substrate;
irradiating the surface of the glass substrate with UV light to form a network polymer on the surface of the glass substrate, the network polymer enclosing the aluminum oxide nanoparticles; and
heating the glass substrate to form the flexible material having the surface protecting layer.

9. The method for manufacturing the flexible material having the surface protecting layer according to claim 8 , wherein the polymerizable monomer includes acrylamide-based acrylate and derivatives thereof.

10. The method for manufacturing the flexible material having the surface protecting layer according to claim 9 , wherein the polymerizable monomer has a general formula of Sa-Sp-Sb,
Sa is

wherein R is H or CH 3 —(CH 2 ) n —, n is an integer of 1-8, and one or more H of CH 3 —(CH 2 ) n —can be replaced by F;
Sp is —(CH 2 ) n —, wherein n is an integer of 1-5, and when n=2, 3, 4, or 5, one CH 2 of —(CH 2 ) n —can be replaced by —O—, —S—, —CO—, —CO—O—, —O—CO—, —O—CO—O—, —OCH 2 —, —CH 2 O—, —CH═CH—, —CF═CF—, —C≡C—, —CH═CH—COO—, or —OCO—CH═CH—; and
Sb is

wherein R is H or CH 3 —(CH 2 ) n —, n is an integer of 1-8, and one or more H of CH 3 —(CH 2 ) n —can be replaced by F.

11. The method for manufacturing the flexible material having the surface protecting layer according to claim 10 , wherein the polymerizable monomer is

12. The method for manufacturing the flexible material having the surface protecting layer according to claim 8 , wherein an irradiation energy of the UV light is 85-100 mW/cm 2 , and an irradiation duration of the UV light is 10-60 minutes.

13. The method for manufacturing the flexible material having the surface protecting layer according to claim 8 , wherein heating the glass substrate to obtain the polyimide mixed solution includes:
heating the glass substrate at 100-120° C. for 5-10 minutes;
heating the glass substrate at 200-250° C. for 20-60 minutes; and
heating the glass substrate at 300-350° C. for 5-15 minutes.

14. The method for manufacturing the flexible material having the surface protecting layer according to claim 8 , wherein before dissolving and uniformly mixing the aluminum oxide nanoparticles and the polymerizable monomer into the polyimide solution to obtain the polyimide mixed solution, the method further comprises:
dissolving one or more dianhydride monomers and one or more diamine monomers into an organic solvent selected from N-methyl-pyrrolidone, N-ethylpyrrolidine, y-hexalactone, dimethyl sulfoxide, or dichloromethane to obtain a polyimide solution.

15. The method for manufacturing the flexible material having the surface protecting layer according to claim 8 , wherein after heating the glass substrate to form the flexible material having the surface protecting layer, the method further comprises:
separating the glass substrate from the flexible material having the surface protecting layer.

16. The method for manufacturing the flexible material having the surface protecting layer according to claim 15 , wherein separating the glass substrate from the flexible material having the surface protecting layer is implemented by a laser or a mechanical separ

Assignees

• Shenzhen China Star Optoelectronics Semiconductor Display Tech Co Ltd

Inventors

• Lan Song

Classifications

• C08G73/1071

  Wholly aromatic polyimides containing oxygen in the form of ether bonds in the main chain · CPC title

• C08L2203/16

  used for films · CPC title

• B29K2509/02

  Ceramics · CPC title

• C08J2433/26

  Homopolymers or copolymers of acrylamide or methacrylamide · CPC title

• C08G73/1067 Primary

  Wholly aromatic polyimides, i.e. having both tetracarboxylic and diamino moieties aromatically bound · CPC title