High-barrier graphene masterbatch for degradable packaging plastic and preparation method thereof

Abstract

The invention belongs to the technical field of a degraded plastic, and concretely provides a high-barrier graphene masterbatch for a degradable packaging plastic and a preparation method thereof. Thenegatively charged polyacrylic acid modified graphene is prepared, then is combined with hydrotalcite, the PAA-graphene is uniformly laminated with the hydrotalcite, the combination is tight, shedding is not easy, the probability of secondary agglomeration of graphene is reduced, graphene with a layered structure and hydrotalcite are uniformly dispersed in a film matrix, and the barrier properties of the degradable packaging plastic can be significantly improved.

Description

technical field [0001] The invention belongs to the technical field of degradable plastics, and specifically provides a high-barrier graphene masterbatch for degradable packaging plastics and a preparation method. Background technique [0002] Biodegradable plastics refer to, under natural conditions such as soil or sandy soil, and / or under specific conditions such as composting conditions or anaerobic digestion conditions or in aqueous culture fluid, microorganisms such as bacteria, mold and seaweed that exist in nature And other effects cause degradation, and finally completely degrade into carbon dioxide (CO2) or / and methane (CH4), water (H2O) and mineralized inorganic salts of the elements contained in it, as well as plastics of new biomass. Biodegradable plastics have been a hot topic in the research of new materials since they came out in the 1980s. They are ideal green polymer materials that can replace petroleum-based plastics, and their cost is only 1 / 5 of that of p...

AI Technical Summary

Problems solved by technology

Although adding graphene to rubber, plastics, coatings, etc. can greatly improve the mechanical properties, however, graphene, as a nanoscale material, has a very high specific surface area, which leads to its agglomeration is very serious

If graphene is directly used in polymer matrices such as rubber, plastics, and coatings, it is easy to reunite, and this agglomeration occurs between atoms, which is an irreversible agglomeration, which makes it impossible to fully utilize the excellent characteristics of graphene sheets.

[0008] Graphene material powder has a high degree of agglomeration and poor dispersion, which is not conducive to the application of graphene materials in barrier products

The traditional coupling modification treatment technology can only partially reduce the surface energy of filled graphene, but it cannot realize the uniform blending of graphene and organic carrier resin, resulting in uneven dispersion of graphene in the preparation of barrier materials and the inability to fully utilize graphene. The advantages of layered structure; in addition, if the bond strength of the loaded graphene is not high, it is easy to fall off, resulting in secondary agglomeration and affecting the performance of the film

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