A kind of bio-based fully degradable plastic masterbatch, its preparation method and application

Abstract

The invention provides bio-based fully-degradable plastic masterbatch as well as a preparation method and application thereof. The bio-based fully-degradable plastic masterbatch is prepared by carrying out extrusion and granulation on a mixed material; the mixed material is prepared from hydrophobic modified starch, matrix resin, an oxidative degradation additive and a biodegradable auxiliary, wherein the mass ratio of the hydrophobic modified starch to the matrix resin is (60 to 80) to (20 to 40), the mass of the oxidative degradation additive accounts for 1 to 20 percent of the total mass of the hydrophobic modified starch and the matrix resin, and the mass of the biodegradable auxiliary accounts for 1 to 10 percent of the total mass of the hydrophobic modified starch and the matrix resin. The modified starch of the plastic masterbatch disclosed by the invention has obvious hydrophobicity, and the compatibility of the starch and plastic polymer requiring degradation can be improved, so that the content of biomass carbon in the plastic to be degraded is increased, and the production processing cost is effectively reduced. The oxidative degradation additive and the biodegradable auxiliary are added in the bio-based masterbatch disclosed by the invention, so that the bio-based masterbatch has multiple degradation effects, the effects of the bio-based masterbatch are superior to the effects of existing starch masterbatch, and the application is wide.

Description

technical field

[0001] The invention relates to the technical field of starch masterbatch, in particular to a bio-based fully degradable plastic masterbatch, its preparation method and application. Background technique

[0002] With the continuous increase of plastic consumption, waste plastics are also increasing, especially the use of plastic products such as mulch film and disposable lunch boxes has caused serious pollution to the environment. In order to solve the problem of environmental pollution caused by plastic waste, biodegradable plastics have been extensively studied. In terms of degradation mechanism, currently researched biodegradable plastics are mainly divided into fully biodegradable plastics and incompletely biodegradable plastics. Fully biodegradable plastics are polymer materials that eventually decompose into inorganic substances such as water and carbon dioxide. However, such degradable plastics have problems such as processing difficulties, poor water...