Degradable seedling growing tray with lignin modified PBAT/PLA (poly (butyleneadipate-co-terephthalate)/polylactic acid) as base material and preparation method of degradable seedling growing tray

Abstract

The invention discloses a degradable seedling growing tray with lignin modified PBAT / PLA (poly (butyleneadipate-co-terephthalate) / polylactic acid) as a base material and a preparation method of the degradable seedling growing tray. The degradable seedling growing tray is prepared by steps as follows: after raw material components are sufficiently mixed, a mixture is extruded and granulated, finally, injection molding is performed by an injection molding machine, and the degradable seedling growing tray is obtained. The degradable seedling growing tray is prepared from raw material components in parts by mass as follows: 30-80 parts of lignin, 5-70 parts of PBAT, 5-60 parts of polylactic acid and 1-10 parts of an auxiliary. According to the degradable seedling growing tray containing ligninmodified PBAT / PLA as the base material and prepared with the method, lignin in a papermaking black liquid can be effectively utilized, waste is recycled, and the environment is protected; meanwhile,the seedling growing tray can be degraded under the natural condition and cannot pollute the environment.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to a degradable seedling raising tray with lignin modified PBAT / PLA as the base material and a preparation method thereof. Background technique [0002] In nature, lignin is regenerated at a rate of 50 billion tons per year. The pulp and paper industry separates about 140 million tons of cellulose from plants every year, and at the same time obtains about 50 million tons of lignin by-products, but so far, more than 95% of lignin is still directly discharged into rivers or rivers as "black liquor". It is burned after being concentrated, and is rarely used effectively. Due to the good similarity between lignin structure and degradable plastics, it is determined that lignin can be combined with degradable plastics with a high content, and the cost of lignin-degradable seedling trays is greatly reduced; lignin comes from nature and is Natural polymers can be well degraded un...

AI Technical Summary

Problems solved by technology

Plastic trays are not biodegradable and need to be recycled and carefully stored by specialized personnel, resulting in increased management costs

Due to the high cost of degradable plastic raw materials, it is difficult to realize the popularization and application of resin trays

The rice plant plaster is made of rice straw as the main raw material. During the processing and production process, the rice straw needs to be pulverized in a pulverizer for subsequent processing. The crushing process increases the cost, and the strength of the rice plant plaster is also low, resulting in the failure of the rice plant plaster. It is also difficult to promote the application

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