Fully-biodegradable material as well as preparation method and application thereof

Abstract

The invention discloses a fully-biodegradable material as well as a preparation method and application thereof. The fully-biodegradable material is prepared from the following raw materials in percentage by weight: 15%-70% of polylactic acid, 20%-50% of starch, 3%-65% of a copolymer of butanediol adipate and butanediol terephthalate, 1%-10% of polylactide polyol, 0.1%-5% of a titanate coupling agent and 0-5% of an aid. The fully-biodegradable material has excellent mechanical property, can be biologically degraded and is relatively low in cost. The preparation method can be easily implemented by virtue of existing high-speed mixing equipment and double-screw extruders. The fully-biodegradable material has excellent and stable performance, can be biologically degraded, is relatively low in cost and is applicable to the fields of plastic packaging materials, agricultural plastic mulching films, disposable tableware and the like.

Description

technical field [0001] The invention relates to the technical field of fully biodegradable materials, in particular to a fully biodegradable material and its preparation method and application. Background technique [0002] With the rapid development of the plastics industry, plastics have been widely used in various fields of the national economy and have a wide range of uses. However, it is followed by the generation of a large amount of waste plastics (for example, about 5 million tons of waste plastics are produced in China every year), most of which are polypropylene (PP), polyethylene (PE) and polystyrene ( PS) materials, these materials cannot be decomposed naturally, therefore, after the products such as disposable plastic packaging materials, agricultural films and disposable tableware made of PP materials, PE materials and PS materials are used, if their wastes are discarded at will , will accumulate on the land due to its non-degradability, causing serious white ...

AI Technical Summary

Problems solved by technology

This technical solution adds phenolic epoxy compounds to the polylactic acid base material, which can promote the combination of the special molecular structures of polylactic acid, phenolic epoxy compounds, and natural starch, thereby improving the biodegradability of the polylactic acid / starch bio-based The mechanical properties of composite materials. On the other hand, adding native starch directly to the polylactic acid base material can reduce the cost of the material to a certain extent, but it still contains certain non-degradable components.

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