A kind of preparation method of fully biodegradable nanocomposite polyester plastic

Abstract

The invention relates to a preparation method of a polysaccharide nanocrystalline composite polyester material. A preparation method of a biodegradable nanocomposite material, characterized in that it comprises the steps of: 1) selecting polysaccharide nanocrystals with a mass ratio of 1:1 to 30 according to the mass ratio of polypolysaccharide nanocrystals and polybutylene succinate (cellulose whiskers or starch nanocrystals), polybutylene succinate raw materials; 2) then adopt the method for solution blending or melt blending respectively, polysaccharide nanocrystals, polybutylene succinate Uniform compounding to obtain a solid mixture; 3) hot-pressing the solid mixture, drying the material, and preparing a polysaccharide nanocrystal modified polybutylene succinate bionano composite material product. The invention has many advantages such as low cost, non-toxic and harmless, environmental protection, complete biodegradability, simple process, etc. The prepared products can be processed into films, sheets, profiles, fibers and containers; they can be used in packaging, biological, medical, Engineering plastics and other material fields.

Description

technical field [0001] The invention relates to a polysaccharide nanocrystal composite modified polyester material and a method for preparing biodegradable materials, which belong to the field of degradable ecological environment materials and also belong to the field of natural polymer materials. Background technique [0002] Various natural polymers in nature belong to biomass resources, such as cellulose, starch and other biomass polysaccharides. They have many types of active functional groups, and have the advantages of being renewable, degradable, and non-toxic. They are regarded as excellent "green" chemical raw materials, and their comprehensive utilization has attracted much attention. Nanocrystals extracted from polysaccharides are a new type of biomass nanoparticles, which not only inherit all the advantages of biomass sources, but also have nanoscale effects such as high surface activity and high specific surface area, and their intrinsic rigid structure shows E...

AI Technical Summary

Problems solved by technology

However, this degradable polyester synthetic material with excellent performance has limited its practical application in the field of materials due to its inherent softness, poor barrier properties, and high price.

In recent years, many organic and inorganic substances have been introduced into the modification research of polybutylene succinate materials, such as natural polymers (cellulose acetate, cellulose, corn starch], chitosan, silk protein, plant or red algal fibers); synthetic polymers (polylactic acid, poly(3-hydroxybutyrate-co-4-hydroxybutyrate), polyethylene oxide); and inorganic nanoparticles (layered silicate, hydrotalcite , carbon nanotubes, silicon nanoparticles), in order to obtain composite materials with high mechanical properties, thermal properties and excellent barrier properties, but the effect is not obvious

[0004] At present, there are few studies on the introduction of biomass polysaccharide nanocrystals into polybutylene succinate materials.