Biodegradable film modified by epoxidized lignin and preparation method thereof

A biodegradation and lignin technology, applied in the field of polymer materials, can solve the problems of poor processing performance, high production cost and low strength of biodegradable films, and can solve the problems of reduced processing performance and mechanical properties, good environment, and improved melt. the effect of strength

Active Publication Date: 2020-07-31
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: The technical problem to be solved by this invention is to provide a biodegradable film mo

Method used

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  • Biodegradable film modified by epoxidized lignin and preparation method thereof
  • Biodegradable film modified by epoxidized lignin and preparation method thereof
  • Biodegradable film modified by epoxidized lignin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0046] Example 1

[0047] (1) Disperse alkali lignin in a mixed solution of 50 parts of water / acetone with a volume ratio of 1:20 in a mass ratio of 1:20, filter to remove insolubles, and then add 3 parts of sodium hydroxide and 20 parts of epoxy Add chloropropane to the mixed solution, stir and react at 55°C for 5h, then add 50 parts of water, adjust the pH to 3.5 with 0.1M hydrochloric acid, wash the solid collected by filtration with water to remove residual acid, dry and crush to obtain epoxidized wood Vegetarian. Among them, alkali lignin is obtained from the black liquor of corn cob and straw after alkali cooking;

[0048] (2) Add 60 parts of PBAT, 10 parts of PLA, 30 parts of the epoxidized lignin described in step (1), 3 parts of tributyl citrate, 2 parts of zinc stearate in the high-speed mixer, Rotate speed and mix for 20min to obtain premix;

[0049] (3) The premix described in step (2) is mixed by a twin-screw extruder and then pelletized to obtain modified particles. ...

Example Embodiment

[0051] Example 2

[0052] (1) Disperse the enzymatically hydrolyzed lignin at a mass ratio of 1:20 in a mixed solution of 50 parts of water / acetone with a volume ratio of 1:1, filter to remove insolubles, and then add 3 parts of sodium hydroxide and 20 parts of cyclic Add oxychloropropane to the mixed solution, stir and react at 55°C for 5h, then add 50 parts of water, adjust the pH to 3.5 with 0.1M hydrochloric acid, wash the solid collected by filtration with water to remove residual acid, dry and crush to obtain epoxidation Lignin; the enzymatically hydrolyzed lignin is obtained from the residue of corn cob and straw after cellulase hydrolysis;

[0053] (2) Add 45 parts of PBAT, 30 parts of PBS, 25 parts of the epoxidized lignin described in step (1), 2 parts of triacetin, 1 part of ethylene bisstearic acid amide in the high-mixer to Rotate speed of 1000rpm, mix for 10min to obtain premix;

[0054] (3) The premix described in step (2) is mixed by a twin-screw extruder and then p...

Example Embodiment

[0056] Example 3

[0057] (1) Disperse the enzymatically hydrolyzed lignin at a mass ratio of 1:20 in a mixed solution of 50 parts of water / acetone with a volume ratio of 1:1, filter to remove insolubles, and then add 3 parts of sodium hydroxide and 20 parts of cyclic Add oxychloropropane to the mixed solution, stir and react at 55°C for 5h, then add 50 parts of water, adjust the pH to 3.5 with 0.1M hydrochloric acid, wash the solid collected by filtration with water to remove residual acid, dry and crush to obtain epoxidation Lignin; the enzymatically hydrolyzed lignin is obtained from the residue of corn cob and straw after cellulase hydrolysis;

[0058] (2) Add 50 parts of PBS, 25 parts of PLA, 25 parts of epoxidized lignin as described in step (1), 2 parts of triacetin, 1 part of ethylene bisstearic acid amide in the high mixer to Rotate speed of 1000rpm, mix for 10min to obtain premix;

[0059] (3) The premix described in step (2) is mixed by a twin-screw extruder and then pel...

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Abstract

The invention discloses a biodegradable film modified by epoxidized lignin and a preparation method thereof. The biodegradable film comprises the following components in parts by weight: 50-95 parts of degradable plastic; 5 to 45 parts of epoxidized lignin; 0.5 to 5 parts of a plasticizer; and 0.5-3 parts of a lubricant, wherein the weight-average molecular weight of the epoxidized lignin is not less than 5000. The epoxidized lignin with a certain molecular weight is used for modifying and degrading plastic, the compatibility and dispersity of lignin in a plastic matrix are improved, meanwhile, an epoxy group of the epoxidized lignin and plastic macromolecules are subjected to a grafting chain extension reaction, and the processing performance and mechanical performance of the material areimproved.

Description

technical field [0001] The invention relates to a biodegradable film modified by epoxidized lignin and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] Plastic films play an irreplaceable role in the fields of packaging and agricultural coverage. Compared with traditional non-degradable or partially degradable films, fully biodegradable films can be completely degraded by microorganisms in nature in a short period of time, leaving no plastic residues Debris greatly reduces the adverse impact on the ecological environment, so the development of fully biodegradable films is currently the main direction to solve the problem of plastic film pollution in the world. [0003] A variety of polyester plastics such as polybutylene terephthalate / adipate (PBAT), polylactic acid (PLA), polycaprolactone (PCL), polybutylene succinate (PBS), Polybutylene succinate / adipate (PBSA), aliphatic polycarbonate (APC), etc. have been proven to...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04C08L97/00C08K5/11C08K5/103C08K5/098C08K5/20C08J5/18
CPCC08J5/18C08J2367/02C08J2467/02C08J2467/04C08J2497/00C08K5/098C08K5/103C08K5/11C08K5/20
Inventor 应汉杰贾运秀李明朱晨杰庄伟唐成伦谭卓涛沈涛柳东陈勇牛欢青杨朋朋吴菁岚高南欧阳平凯
Owner NANJING UNIV OF TECH
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