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Lignin-based biodegradable polymer composite film and preparation method thereof

A composite material film and polymer material technology, applied in the field of lignin-based biodegradable polymer composite material film and its preparation, can solve the problems of easy combustion, high price, low strength, etc. The effect of uniform and sufficient nucleation ability

Active Publication Date: 2021-01-29
HUAIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing degradable polymer material films have disadvantages such as flammability, low strength and high price.

Method used

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  • Lignin-based biodegradable polymer composite film and preparation method thereof
  • Lignin-based biodegradable polymer composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] After 25 parts of lignin are air-pulverized to a particle size of 0.2 μm-8 μm, they are stirred and mixed with 5 parts of caprolactone in a high-speed mixer at 90°C for 20 minutes, then cooled to room temperature to obtain caprolactone-grafted lignin ( Lignin-PCL); Lignin-PCL is mixed with 100 parts of butylene adipate and butylene terephthalate copolymer (PBAT) to obtain a precursor, and the resulting precursor is extruded through a twin-screw The lignin / PBAT composite material is obtained by machine melt blending extrusion and granulation; the lignin / PBAT composite material is blown upward by a blow molding machine to obtain a lignin / PBAT composite material film. The first zone of the twin-screw extruder is 100°C, the second zone is 120°C, the third zone is 140°C, the fourth zone is 150°C, the fifth zone is 160°C, the sixth zone is 165°C, the head is 165°C, the screw speed is 100rpm; the first zone of the blow molding machine is 120°C ℃, the second zone is 140°C, the ...

Embodiment 2

[0030] After 20 parts of lignin is air-pulverized to a particle size of 0.2 μm-8 μm, it is stirred and mixed with 2 parts of caprolactone in a high-speed mixer at 85°C for 30 minutes, then cooled to room temperature to obtain caprolactone-grafted lignin ( Lignin-PCL); Lignin-PCL is mixed with 100 parts of polylactic acid (PLLA) to obtain a precursor, and the obtained precursor is melt blended and extruded by a twin-screw extruder, and pelletized to obtain a lignin / PLLA composite material; The lignin / PLLA composite material is blow-molded upward through a blow molding machine to obtain a lignin / PLLA composite material film. The first zone of the twin-screw extruder is 120°C, the second zone is 140°C, the third zone is 150°C, the fourth zone is 160°C, the fifth zone is 170°C, the sixth zone is 175°C, the head is 175°C, the screw speed is 120rpm; the first zone of the blow molding machine is 120°C ℃, the second zone is 150°C, the third zone is 170°C, the fourth zone is 180°C, and...

Embodiment 3

[0032] After 10 parts of lignin is air-pulverized to a particle size of 0.2 μm-8 μm, it is stirred and mixed with 2 parts of caprolactone in a high-speed mixer at 90°C for 10 minutes, then cooled to room temperature to obtain caprolactone-grafted lignin ( Lignin-PCL); Lignin-PCL is mixed with 100 parts of polybutylene succinate (PBS) to obtain a precursor, and the obtained precursor is melt-blended and extruded by a twin-screw extruder, and pelletized to obtain a wood The lignin / PBS composite material; the lignin / PBS composite material is blow-molded upwards through a blow molding machine to obtain a lignin / PBS composite material film. The first zone of the twin-screw extruder is 90°C, the second zone is 100°C, the third zone is 110°C, the fourth zone is 120°C, the fifth zone is 130°C, the sixth zone is 140°C, the head is 140°C, the screw speed is 100rpm; the first zone of the blow molding machine is 100°C ℃, the second zone is 120°C, the third zone is 140°C, the fourth zone i...

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Abstract

The invention discloses a lignin-based biodegradable polymer composite film which is prepared from the following raw materials in parts by weight: 100 parts of a biodegradable polymer material, 5-30 parts of lignin and 0.2-6 part of caprolactone. The invention also provides a preparation method of the lignin-based biodegradable polymer composite film. The preparation method has the advantages thatthe prepared lignin-based biodegradable polymer composite film is high in tensile strength and tear strength, resistant to ultraviolet radiation, flame-retardant, simple in preparation process, low-carbon, environment-friendly, high in production efficiency and easy to industrialize.

Description

【Technical field】 [0001] The invention relates to the technical field of polymer materials, in particular to a lignin-based biodegradable polymer composite film and a preparation method thereof. 【Background technique】 [0002] Since the 21st century, while traditional plastic films have brought convenience to human life, the problem of "white pollution" caused by non-degradability has become increasingly serious. With the promulgation of plastic restrictions and bans in recent years, degradable polymer films have developed rapidly. However, existing degradable polymer material films have disadvantages such as flammability, low strength and high price. [0003] Industrial lignin (lignin is a natural biomass material) is papermaking industrial waste with low price; about 95% of industrial lignin in the world is burned as fuel or directly discharged every year, which not only causes serious resource and energy losses Waste, and also produce serious pollution to the environmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L97/00C08J5/18C08G83/00C08H7/00
CPCC08J5/18C08G83/00C08H6/00C08J2367/02C08J2367/04C08J2497/00
Inventor 苏胜培舒友欧阳跃军林红卫罗琼林向德轩张再兴李佩瑛赵怡馨
Owner HUAIHUA UNIV
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