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A polylactic acid modified material with high strength, good heat resistance and controllable degradation and its preparation method

A modified material, polylactic acid technology, applied in the field of polylactic acid modified material and its preparation, can solve the problems of poor heat resistance, low strength, etc., and achieve the effect of effective industrialization and popularization

Inactive Publication Date: 2019-04-30
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the disadvantages of poor heat resistance and low strength of polylactic acid, the present invention provides a polylactic acid modified material with high strength, good heat resistance and controllable degradation and a preparation method thereof, while ensuring environmental protection and low cost. characteristic

Method used

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  • A polylactic acid modified material with high strength, good heat resistance and controllable degradation and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A polylactic acid modified material with high strength, good heat resistance and controllable degradation is made of the following raw materials in parts by mass: polylactic acid: 10 parts, filler: 1 part, crosslinking agent: 1 part, resistant Thermal toughening modifier: 1 part; auxiliary degradation agent: 0.2 part.

[0020] The polylactic acid is 3 parts of L-polylactic acid and 7 parts of D-polylactic acid with an average molecular weight of 50,000.

[0021] The filler is 0.5 part of nano-calcium carbonate and 0.5 part of montmorillonite with a fineness of 5000 mesh.

[0022] The cross-linking agent is contained in 0.5 part of polyethylene glycol and 0.5 part of polypropylene glycol.

[0023] The heat-resistant toughening modifier is 0.5 parts of vinyl resin glass flakes and 0.5 parts of TMP-3000 fine crystal transparent powder.

[0024] Described auxiliary degradation agent is the nanometer TiO of 0.1 part 2 and 0.1 parts of nano-calcium lactate.

[0025] A met...

Embodiment 2

[0029] A polylactic acid modified material with high strength, good heat resistance and controllable degradation, made of the following raw materials in parts by mass: polylactic acid: 50 parts, filler: 15 parts, crosslinking agent: 3 parts, resistant Thermal toughening modifier: 5 parts; auxiliary degradation agent: 1 part.

[0030] The polylactic acid is 20 parts of L-polylactic acid and 30 parts of D-polylactic acid with an average molecular weight of 100,000.

[0031] The filler is 5 parts of nano-calcium carbonate and 10 parts of montmorillonite with a fineness of 5000 mesh.

[0032] The cross-linking agent is 1 part of polyethylene glycol and 2 parts of polypropylene glycol.

[0033] The heat-resistant toughening modifier is 3 parts of vinyl resin glass flakes and 2 parts of TMP-3000 fine crystal transparent powder.

[0034] Described auxiliary degradation agent is the nanometer TiO of 0.5 part 2 and 0.5 parts of nano-calcium lactate.

[0035] All the other are with ...

Embodiment 3

[0037] A polylactic acid modified material with high strength, good heat resistance and controllable degradation is made of the following raw materials in parts by mass: polylactic acid: 90 parts, filler: 30 parts, crosslinking agent: 5 parts, resistant Thermal toughening modifier: 10 parts; auxiliary degradation agent: 2 parts.

[0038] The polylactic acid is 30 parts of L-polylactic acid and 60 parts of D-polylactic acid with an average molecular weight of 150,000.

[0039] The filler is 10 parts of nano-calcium carbonate and 20 parts of montmorillonite with a fineness of 5000 mesh.

[0040] The cross-linking agent is 2 parts of polyethylene glycol and 3 parts of polypropylene glycol.

[0041] The heat-resistant toughening modifier is 4 parts of vinyl resin glass flakes and 6 parts of TMP-3000 fine crystal transparent powder.

[0042] Described auxiliary degradation agent is the nano-TiO of 1 part 2 and 1 part Nano Calcium Lactate.

[0043] All the other are with embodim...

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Abstract

The invention relates to a polylactic acid modified material with high strength, good heat resistance and controllable degradability and a preparation method thereof, belonging to the field of polymer compounds. The ratio of raw materials used in the modified material is as follows: polylactic acid: 10-90 parts, filler: 1-30 parts, crosslinking agent: 1-5 parts, heat-resistant toughening modifier: 1-10 parts; Degradant: 0.2-2 parts; the present invention modifies the polylactic acid material by using relatively environment-friendly raw materials. The process is simple and the cost is low. It introduces green Nano-TiO photocatalytic material 2 And nano-calcium lactate, which can selectively change the degradation performance of the material. It can promote the further industrialized production and popularization of polylactic acid.

Description

technical field [0001] The invention relates to a polylactic acid modified material with high strength, good heat resistance and controllable degradation and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Polylactic acid (PLA), also known as polylactide, is an important lactic acid derivative, a type of polymer material obtained by chemical synthesis or biosynthesis with lactic acid as a monomer. Polylactic acid has the advantages of non-toxic and non-irritating, excellent biocompatibility, easy degradation, strong plasticity, and easy processing and molding. It is favored in the polymer material industry, and has broad application prospects in environmental protection. [0003] Although polylactic acid has excellent biocompatibility and easy degradability, and is very friendly to the environment, polylactic acid still has many shortcomings, such as low strength, poor toughness, and low heat distortion tempe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L63/10C08L71/02C08K13/04C08K7/00C08K3/40C08K3/22C08K5/098C08K3/26C08K3/34
CPCC08K2003/2241C08K2003/265C08K2201/003C08K2201/011C08L67/04C08L2201/06C08L2201/08C08L2205/025C08L2205/035C08L63/10C08L71/02C08K13/04C08K7/00C08K3/40C08K3/22C08K5/098C08K3/26C08K3/346
Inventor 张世庆谢宇
Owner NANCHANG HANGKONG UNIVERSITY