Microcapsule starch-based bioplastic and preparation method

Abstract

Belonging to the technical field of bioplastics, the invention relates to a microcapsule starch-based bioplastic and a preparation method. Technically, the invention aims to provide a microcapsule starch-based bioplastic and a preparation method. The method utilizes the characteristic that the capsule wall material and matrix resin have good compatibility, bonds polyvinyl alcohol and starch as thecore, employs polytetrafluoroethylene as the capsule wall material to coat starch so as to obtain microcapsules, and disperses the microcapsules in resin to obtain masterbatch, thus improving the compatibility of starch and resin, and enhancing the mechanical properties of the film. Also compared with the conventional modification treatment process of starch biomass materials, microencapsulationtreatment solves the problem of tedious steps and broadens the application fields.

Description

technical field [0001] The invention relates to a microcapsule starch-based bioplastic and a preparation method thereof, belonging to the technical field of bioplastics. Background technique [0002] With the increasing energy crisis caused by oil shortage and the "white pollution" caused by waste plastics, bioplastics have attracted widespread attention from researchers due to their natural, environmentally friendly and renewable properties. Bioplastics refer to plastics prepared on the basis of natural biomass materials such as starch. They are high-molecular substances that have excellent performance during use and can be rapidly decomposed by enzymes or microorganisms after use. Bioplastics developed from starch not only effectively control "white pollution", but also can replace petroleum-based plastics, and the cost is only 1 / 5 of that of petroleum-based plastics. Developed countries such as Germany, Austria, the Netherlands, the United States, Italy, and Japan have l...

AI Technical Summary

Problems solved by technology

[0005] In summary, the above methods are all directly blending starch with polymers to obtain plastics. However, since starch molecules contain a large number of hydroxyl groups and form strong crystallization through hydrogen bonds, a large number of molecular chains gather together to form a tight double helix structure. Crystallization The regular arrangement causes the starch crystalline particles to have a hard shell, and many of the characteristics brought about by this limit the direct use of starch for processing or replacing plastic films and other products, especially agricultural mulch, which is more difficult

In addition, when nanocellulose is used as a reinforcement in composite materials, it has disadvantages such as difficult dispersion, easy thermal degradation, and poor compatibility with polymer matrices.

Therefore, currently, bio-based films made of bioplastics suffer from rather poor mechanical properties, good hydrophilicity, and poor processability, which limit their industrial applications.