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Special efficient nucleating agent for lignin grafted polylactic acid as well as preparation method and application of special efficient nucleating agent

A technology of polylactic acid and lignin, which is applied in the field of biodegradable polymer materials, can solve the problems of restricting the processing and application of polylactic acid resin, insufficient heat resistance of molded products, and long molding cycle, so as to improve the crystal structure and chemical reagents. Effect of less residue, increase in crystallization rate and degree of crystallization

Pending Publication Date: 2022-08-09
南京塑净新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polylactic acid resin has slow crystallization rate, long molding cycle, and insufficient heat resistance of molded products during use, which seriously restricts the processing and application of polylactic acid resin products. This urgent technical problem has become a hot issue in the field of polylactic acid resin preparation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Dry PLA-3001D and alkali lignin (Shandong Longli Biotechnology Co., Ltd.) at 60° C. for 2 hours, and set aside for use;

[0035] (2) After drying, take PLA-3001D (75 parts by weight) and alkali lignin (1 part by weight), and then weigh the catalyst: 1,5,7-triazabicyclo[4.4. 0] Dec-5-ene (TBD) (part by weight is 1 part), anti-hydrolysis agent: carbodiimide trade mark is UN-150 (part by weight is 0.3 part) and added to the high-speed mixer successively and stirred for 5 ~8 minutes, ready to use;

[0036] (3) adding the mixture of step (2) into a twin-screw extruder for melt blending and extrusion, then coarsely grinding the particles by a grinder, and dissolving 150g of the ground material in 15mg of dichloromethane and 200mL of glacial acetic acid in the mixed solution, after waiting for complete dissolution, precipitation through a mixed solution of absolute ethanol and water (v / v=9:1, 400mL), centrifugation, and vacuum drying to obtain the product, which is finall...

Embodiment 2

[0041] (1) Dry PLA-3001D and alkali lignin (Shandong Longli Biotechnology Co., Ltd.) at 60° C. for 2 hours, and set aside for use;

[0042] (2) After drying, take PLA-3001D (80 parts by weight) and alkali lignin (1.5 parts by weight), and then weigh the catalyst: 1,5,7-triazabicyclo[4.4. 0] Dec-5-ene (TBD) (part by weight is 1 part), anti-hydrolysis agent: carbodiimide trade mark is UN-150 (part by weight is 0.3 part) and added to the high-speed mixer successively and stirred for 5 ~8 minutes, ready to use;

[0043](3) adding the mixture of step (2) into a twin-screw extruder for melt blending and extrusion, then coarsely grinding the particles by a grinder, and dissolving 150g of the ground material in 15mg of dichloromethane and 200mL of glacial acetic acid in the mixed solution, after waiting for complete dissolution, precipitation through a mixed solution of absolute ethanol and water (v / v=9:1, 400mL), centrifugation, and vacuum drying to obtain the product, which is fina...

Embodiment 3

[0048] (1) Dry PLA-3001D and alkali lignin (Shandong Longli Biotechnology Co., Ltd.) at 60°C for 2 hours, and set aside for use;

[0049] (2) After drying, take PLA-3001D (85 parts by weight) and alkali lignin (2 parts by weight), and then weigh the catalyst: 1,5,7-triazabicyclo[4.4. 0] Dec-5-ene (TBD) (part by weight is 1 part), anti-hydrolysis agent: carbodiimide trade mark is UN-150 (part by weight is 0.3 part) and added to the high-speed mixer successively and stirred for 5 ~8 minutes, ready to use;

[0050] (3) adding the mixture of step (2) into a twin-screw extruder for melt blending and extrusion, then coarsely grinding the particles by a grinder, and dissolving 150g of the ground material in 15mg of dichloromethane and 200mL of glacial acetic acid in the mixed solution, after waiting for complete dissolution, precipitation through a mixed solution of absolute ethanol and water (v / v=9:1, 400mL), centrifugation, and vacuum drying to obtain the product, which is finally...

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Abstract

The invention discloses a special efficient nucleating agent for lignin grafted polylactic acid as well as a preparation method and application of the special efficient nucleating agent. The nucleating agent is prepared from the following components in parts by weight: 75-95 parts of polylactic acid, 1-5 parts of lignin, 1-4 parts of a catalyst and 0.3-2 parts of an anti-hydrolysis agent. The special efficient nucleating agent for lignin grafted polylactic acid provided by the invention can greatly improve the crystallization rate and crystallinity of PLA, improves the crystal structure of PLA, does not affect the bio-based degradability of PLA, and can achieve a remarkable effect by adding a small amount of nucleating agent.

Description

technical field [0001] The invention relates to the field of biodegradable polymer materials, in particular to a special high-efficiency nucleating agent for lignin-grafted polylactic acid and a preparation method and application thereof. Background technique [0002] As a thermoplastic aliphatic polyester derived from renewable resources, polylactic acid (PLA) not only has good biodegradability and biocompatibility, but also has excellent mechanical strength and processability, so it is widely used in general plastics. The field is still in the field of biomedical materials, and PLA has shown broad application prospects. However, polylactic acid resin has slow crystallization rate, long molding cycle and insufficient heat resistance of molded products in use, which seriously restricts the processing and application of polylactic acid resin products. This urgent technical problem has become a hot issue in the field of polylactic acid resin preparation. . [0003] In the pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C08L67/04C08L87/00C08J9/00
CPCC08G81/00C08L67/04C08J9/0061C08L2205/24C08J2367/04C08J2487/00C08L87/005
Inventor 邵羽静文许红森朱晨杰龙浩宇金俊阳梁国超朱继阳李康蒋天尘李培宁张倩朱莹莹肖红杰
Owner 南京塑净新材料科技有限公司
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