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A method for improving the water vapor barrier performance of polymer films by surface crosslinking

A polymer film and water vapor barrier technology, which is applied in the field of improving the water vapor barrier performance of polymer films, can solve problems such as poor stability and damage, and achieve high water vapor barrier ability, firm combination, and retain physical properties.

Active Publication Date: 2019-01-22
CHENGDU SCI & TECH DEV CENT CHINA ACAD OF ENG PHYSICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem of poor stability or new damage caused by the method for improving the barrier properties of polymer films in the prior art, and provide a mild surface crosslinking method to improve the barrier properties of polymer films

Method used

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  • A method for improving the water vapor barrier performance of polymer films by surface crosslinking
  • A method for improving the water vapor barrier performance of polymer films by surface crosslinking
  • A method for improving the water vapor barrier performance of polymer films by surface crosslinking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]Fix the polychlorinated p-xylylene film (thickness 100 μm) on the sample stage of the superthermal hydrogen system (CN 102414359 A), the distance of the processed polymer film sample from the plasma discharge area is 50cm, and the place above the film sample is 10-20cm There are two repelling electrode plates, positive and negative, respectively. Turn on the vacuum pump to evacuate, then pass in 14SCCM (standard ml / min) hydrogen, and turn on the microwave plasma, turn on the acceleration power supply and the repulsion power supply, the acceleration voltage is 100V, and the film sample is bombarded with hydrogen for 1min to obtain modification and improve the surface water vapor barrier. performance polymer films.

Embodiment 2

[0032] The same polychlorinated p-xylylene film as in Example 1 is fixed on the sample stage of the superthermohydrogen system, and the processed polymer film sample is 60 cm away from the plasma discharge area, and the 10-20 cm above the film sample is respectively placed There are positive and negative two repelling electrode plates. Turn on the vacuum pump to make the vacuum in the cavity reach 6×10 -4 At Pa, 14SCCM hydrogen gas was introduced in sequence, and the microwave plasma was turned on, and the acceleration power supply and repulsion power supply were turned on. The microwave power was 300W, the acceleration voltage was 100V, and the film sample was bombarded with hydrogen for 1min to obtain a film with enhanced surface water vapor barrier properties.

Embodiment 3

[0034] The polychlorinated p-xylylene film (thickness 100 μm) was ultrasonically cleaned in a container containing acetone for 15 min, and dried with nitrogen. Fix the film on the sample stage of the superthermal hydrogen system. The distance between the processed polymer film sample and the plasma discharge area is 45cm, and two positive and negative repelling electrode plates are respectively placed at 10-20cm above the film sample. Turn on the vacuum pump to make the vacuum in the cavity reach 6×10 -4 At Pa, 14 SCCM hydrogen gas was introduced in sequence, and the microwave plasma was turned on, and the acceleration power supply and the repulsion power supply were turned on. The microwave power was 300W, the acceleration voltage was 100V, and the film sample was bombarded with hydrogen for 1min to obtain a film with enhanced surface water vapor barrier properties.

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Abstract

The invention discloses a method for improving water vapor barrier property of a polymer film by virtue of surface crosslinking. The polymer surface is bombarded by using hydrogen molecules with energy under vacuum conditions, a crosslinking reaction on the surface of the polymer is initiated, and the polymer of which the surface is provided with water vapor barrier property is obtained. The polymer surface is bombarded by virtue of the high-energy neutral hydrogen molecules, the crosslinking reaction on the polymer surface is initiated, and a surface crosslinking layer which is firmly bound and is dense is formed, so that the polymer has good water vapor barrier property. The most important is that the method disclosed by the invention is mild in reaction conditions, the condition that the polymer molecules are degraded and damaged in the process of crosslinking the polymer surface is avoided, the water vapor barrier property of the film can be effectively improved, and the original physical properties of the polymer film are remained.

Description

technical field [0001] The invention relates to a method for improving the water vapor barrier performance of a polymer film through surface crosslinking. Background technique [0002] Blocking water vapor in the air is of great significance to metal anticorrosion, electronic components protection, food preservation and cultural relics protection. Polymer barrier protection materials have the characteristics of good flexibility, low cost, and easy processing, and are widely used to isolate moisture. However, compared to inorganic barrier materials, polymeric barrier materials suffer from insufficient water vapor barrier properties due to their low chain packing density and crystallinity. [0003] At present, methods such as vacuum vapor deposition of inorganic coatings, addition of inorganic flake fillers, and cross-linking reactions are used to improve the water vapor barrier properties of polymers. diffusion. Among them, the deposition of dense inorganic coatings (such ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/12
Inventor 唐昶宇邵虹胡歆何周坤杨建帅茂兵刘焕明梅军
Owner CHENGDU SCI & TECH DEV CENT CHINA ACAD OF ENG PHYSICS
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