A kind of thermoplastic biodegradable material and preparation method thereof

Abstract

The invention aims to solve the problems that conventional plastic products are degraded hardly and can cause white pollution and other serious environmental problems in the prior art, and provides a thermoplastic biodegradable material. The thermoplastic biodegradable material comprises the following raw materials by weight: 10-20 g of starch, 2.5-4 g of a plasticizer, 12-25 g of cellulose, 8-12 g of chitin, 2.0-3.5 g of benzophenone, 1-1.5 g of p-benzoquinone, 2-10 g of carbonyl compound and 10-20 g of polypropylene carbonate. According to the thermoplastic biodegradable material, the adopted starch is wide in source and low in price, the added cellulose is a natural macromolecule, and has excellent biodegradability, and the chitin is adopted, so that the thermoplastic biodegradable material has high heat resistance, water resistance, ageing resistance and fracture resistance. Meanwhile, the invention further provides a preparation method for the thermoplastic biodegradable material, the process is simple, the operation is easy, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of biochemistry, in particular to a thermoplastic biodegradable material and a preparation method thereof. Background technique [0002] Traditional plastics are derived from petroleum. With the rapid development of the global economy, the demand for petroleum in various countries is increasing year by year, and petroleum resources will inevitably be exhausted. Therefore, in the face of the two major problems of environmental pollution and resource shortage, the development of biodegradable plastics has become a hot topic of social concern and technical research in the industry. [0003] Biodegradable plastic refers to a type of plastic that is degraded by the action of microorganisms such as bacteria, mold (fungi) and algae that exist in nature under certain conditions. The ideal biodegradable plastic is a polymer material that has excellent performance, can be completely decomposed by environmental microorganisms a...

AI Technical Summary

Problems solved by technology

[0005] 1. The process is complex, and the starch is separated from the linear chain and the branched chain. The process is complicated, which is one of the reasons that affects the cost.

[0006] 2. Compared with ordinary plastics, thermoplastic starch plastics produced at this stage have poor heat and water resistance and low mechanical strength

[0007] 3. The thermoplastic starch-based materials produced at this stage are prone to recrystallization, aging and brittleness during the placement process and lose their usability

It is sensitive to water, and its hydraulic performance will decrease, so it is not suitable for wide application

[0008] 4. Due to the production process, formula and other reasons, the cost of the product has increased, and the price of the final product is relatively high, which is not easy to promote in the market