Method for preparing biodegradable composite material with high steam barrier property

Abstract

The invention provides a method for preparing a biodegradable composite material with a high steam barrier property. The method is mainly characterized in that a biodegradable high polymer is used as a matrix and a hydrophobic biodegradable ester type compound is used as a dispersion phase; the matrix and the dispersion phase are melted and mixed and a morphological structure of the morphological structure in the morphological structure matrix is regulated and controlled; effective compounding is utilized so that on one hand, the polarity of the composite material is reduced, influences of steam on the composite material are weakened and a diffusion path of the steam on the surface of the composite material is locked; on the other hand, a diffusion path of the steam in the composite material is increased so that the high steam barrier property is obtained and the steam barrier property can be stabilized for environment humidity. The method provided by the invention is a continuous production process and a process is simple; the quality indexes of products between different batches are stable and the method can be used for larges-scale industrial production; the method has wide industrialization and market prospects and has important significance in the aspects of theoretical researches, application development and the like of the composite material.

Description

technical field [0001] The invention relates to a preparation method of a high water vapor barrier biodegradable composite material, more particularly to a preparation method that is completely biodegradable, melt processable, excellent in mechanical properties, excellent in water vapor barrier properties and whose barrier properties do not follow The invention relates to a method for a biodegradable composite material with high water vapor barrier in the case of environmental humidity changes, and relates to the technical field of composite materials. Background technique [0002] Biodegradable polymer materials are a wide range of renewable resources, with good biocompatibility, easy to degrade in the natural environment without causing pollution, and have become the preferred alternative to traditional petroleum-based plastics, and are widely used in barrier materials. . However, some biodegradable polymer materials, such as natural polymer materials, contain polar group...

AI Technical Summary

Problems solved by technology

[0012] In view of the shortcomings of traditional biodegradable barrier materials, such as poor water vapor barrier performance and failure of barrier performance in high humidity environments, and the shortcomings of the existing solution method for preparing water vapor barrier composite materials, the purpose of the present invention is to propose a melt co- A method for preparing a high water vapor barrier biodegradable composite material that is completely biodegradable, can be produced continuously, has excellent mechanical properties, excellent water vapor barrier properties, and its barrier properties do not change with the ambient humidity. The method biodegrades the polymer matrix And the effective compounding of the hydrophobic dispersed phase in the melt processing process, as well as the effective regulation of the structure of the composite material, in a simple solvent-free process, the water vapor barrier performance of the material can be improved, and high water vapor barrier performance and good mechanical properties can be achieved. Both features