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Polymer film modified by fluororesin and preparation method thereof

A polymer film and polymer technology, applied in the direction of coating, can solve the problems of poor adhesion, achieve the effect of improving barrier performance, easy industrialized large-area processing, and retaining physical properties

Active Publication Date: 2015-12-23
CHENGDU SCI & TECH DEV CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to solve the problem of poor adhesion of the fluororesin coating on the surface of the polymer film, provide a mild surface modification method, and improve the surface of the polymer film.

Method used

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  • Polymer film modified by fluororesin and preparation method thereof
  • Polymer film modified by fluororesin and preparation method thereof
  • Polymer film modified by fluororesin and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] The polychlorinated p-xylylene film (thickness 100μm) was treated with air plasma (100V, 2min), so that the surface was activated and modified. The film was placed in a PAA solution (10mg / mL) and dip-coated for 1min. Pre-dry in an oven at 80°C for 3 minutes for use; then dip-coat the pre-dried sample in a pre-prepared fluororesin solution (50 mg / mL) for 1 minute, and then cure it in an oven at 80°C for 1 hour to obtain a certain Flat polymer film surface for barrier to moisture vapor and adhesion.

Embodiment 2

[0036] The polychlorinated p-xylylene film (thickness 100 μm) was ultrasonically cleaned in acetone and ethanol for 10 min and 15 min in turn, and dried with nitrogen. Treat the clean polymer film with air plasma (150V, 1.5min) to activate and modify the surface. The film is sprayed with PEI solution (30mg / mL) for 1min and then placed in an oven at 75°C for 5min for pre-drying. Then put the pre-dried sample in the pre-prepared fluororesin solution (40mg / mL) for dip coating for 1min, and then cure it in an oven at 80°C for 1h to obtain a flat polymer film surface with a certain barrier to water vapor and adhesion .

Embodiment 3

[0038] Put the polychlorinated p-xylylene film (thickness 100 μm) into a container containing acetone and ethanol for ultrasonic cleaning for 15 min, and dry it with nitrogen. Treat the clean polymer film with air plasma (200V, 1min) to activate the modified film on the surface and place it in a container containing a mixed solution (50mg / mL) of PVA and KH550 (ratio: 3:1) Dip coating for 2 minutes, put it in an oven at 80°C for 5 minutes and pre-dry it for use; then spray the pre-dried sample with a pre-prepared fluororesin solution (30mg / mL) for 1 minute, and then cure it in an oven at 80°C for 1 hour to obtain Flat polymer film surface with certain water vapor barrier and adhesion.

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Abstract

The invention discloses a polymer film modified by fluororesin. The surface-modified polymer film comprises a polymer substrate layer, a transition layer attached to the polymer substrate layer and a fluororesin layer attached to the transition layer; the polymer substrate layer is made of polymers with low surface energy, and the transition layer is made of polymer materials with polar functional groups. Meanwhile, the invention further provides a method for preparing the polymer film. Activating treatment is performed on the polymer film with plasma, the polymer film is coated with a polymer solution with the polar functional groups, dried, coated with the fluororesin, dried and cured, and then the surface-modified polymer film product is obtained. According to the modified film product, pretreatment activation is performed with the air plasma, and co-treatment of the polymer film and the polar coating can achieve industrialized large-area treatment; meanwhile, due to the fact that hydrogen-bond interaction is formed between the polar transition layer and the fluororesin, the bonding force is excellent. In addition, the barrier property (especially the water vapor barrier property) of the modified polymer film is improved.

Description

technical field [0001] The invention relates to a method for modifying the surface of a polymer material, in particular to a method for improving the adhesion between a polymer film and a coating. Background technique [0002] There are many kinds of functional polymer film materials (such as polyethylene, polypropylene, polyester film, etc.), good flexibility and easy processing, and have a wide range of applications in electronic devices, food packaging, military and other fields. These functional films are usually composed of multilayer structures, which are prepared by superimposing various coatings on the polymer film substrate. The addition of coatings can endow the film surface with new physical and chemical properties. For example, coating emulsion and polyurethane on the surface of polyester film can improve the surface wettability and surface hardness of the film respectively (CN102604523A). However, most polymer films have low surface energy, lack of active group...

Claims

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Application Information

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IPC IPC(8): C08J7/04C08J7/00C09D127/12C08L65/00C08L67/02C08L23/06
Inventor 唐昶宇帅茂兵邵虹何周坤梅军刘焕明
Owner CHENGDU SCI & TECH DEV CENT CHINA ACAD OF ENG PHYSICS
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