A polymer composite material with high gas and liquid barrier performance and its preparation method

Abstract

The invention discloses a polymer composite material. The polymer composite material comprises a polymer matrix layer, a modification layer and a barrier function layer, wherein the modification layeris a functional material layer which is chemically grafted with the surface of the polymer matrix layer through super-thermal hydrogen treatment; the barrier function layer is a silicon rubber polymer composite coating containing graphene oxide. According to the polymer composite material disclosed by the invention, the barrier function layer adopts the composite coating of the graphene oxide anda silicon rubber polymer; a sheet-shaped and laminar barrier structure is formed in silicon rubber through a sheet-shaped structure of the graphene oxide; the structure is cooperated with a silicon rubber material to have a natural hydrophobic property, and the surface energy is extremely low, so that the composite material has a super-hydrophobic liquid barrier and waterproof effect; meanwhile,the efficient gas and liquid water barrier performance of the composite material is realized.

Description

technical field [0001] The invention belongs to the field of composite materials, and relates to a polymer composite material with high gas and liquid barrier properties and a preparation method thereof. By preparing a composite film layer structure, the composite material has outstanding gas and liquid barrier properties to meet special application requirements . Background technique [0002] High material barrier properties such as high barrier packaging materials can improve the preservation effect and prolong the storage time of products, and have achieved rapid development in the field of food packaging such as cans, beverages, juices, and milk. Components and other industrial fields also have a wide range of applications. Usually high barrier means that a material has a strong ability to prevent another material such as common gas, water vapor, liquid, organic matter, etc. access to the low concentration side). [0003] Polymer materials are widely used for their ex...

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Problems solved by technology

[0004] In addition, it is difficult for common barrier materials to meet the high-efficiency barrier to different gases or liquids at the same time. For example, the barrier performance of polyethylene (PE) to oxygen is worse than that of ethylene / vinyl alcohol copolymer (EVOH), but the water vapor barrier performance of PE However, it is better than EVOH. At the same time, the barrier performance of PE to liquid water droplets, that is, the commonly said waterproof performance, is also better than EVOH. Therefore, high barrier materials that can simultaneously have different types of gases and liquids can further expand their practical application fields.

For the barrier of liquid water droplets, because superhydrophobic materials have excellent properties that water droplets cannot infiltrate on the surface of the material, it can effectively achieve high-efficiency barriers, but the insufficient mechanical damage resistance of superhydrophobic materials has always been a fatal flaw in its practical application.

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