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Starch-filled PLA/PBAT full-biodegradable composite material and preparation method thereof

A composite material and all-biological technology, which is applied in the field of starch-filled PLA/PBAT fully biodegradable composite materials and its preparation, can solve the problems of poor toughness of polylactic acid, poor resin compatibility, difficult starch processing, etc., and achieve short production cycle, The effect of reducing white pollution and simple operation

Active Publication Date: 2020-02-28
QINGDAO RICH PLASTIC NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention proposes a starch-filled PLA / PBAT fully biodegradable composite material and its preparation method. The composite material not only solves the technical defects of polylactic acid such as poor toughness and brittleness, but also solves the problems of difficult processing of starch and poor compatibility with resins. technical problems, so that the resulting product has fully biodegradable properties

Method used

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  • Starch-filled PLA/PBAT full-biodegradable composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Formula: 5 parts of PLA (4060D), 75 parts of PBAT (TH801T), 20 parts of corn starch, 5 parts of plasticizer (PEG400), 1 part of coupling agent (KH560), 0.5 parts of dispersant (calcium stearate), 0.5 part of compatibilizer (MDI), 0.1 part of antioxidant 1010 and 0.1 part of antioxidant 168.

[0024] Preparation method: Dry PLA, PBAT and starch at 80°C for 4 hours in advance, then weigh the materials according to the above weight ratio, and mix them in a high-speed mixer at 60°C for 25 minutes. Then use a twin-screw extruder to blend and extrude to pelletize. The temperature of the extruder area (from the feed port to the die head) is set to 130°C, 160°C, 160°C, 160°C, 160°C, 160°C, 160°C, 165°C, 165°C, 165°C, 160°C , the feed rate is 30kg / h, and the rotation speed of the extrusion screw is 300rpm. The selected twin-screw extruder is φ35mm×2, L / D=44.

Embodiment 2

[0026] Formula: 40 parts of PLA (4060D), 20 parts of PBAT (TH801T), 40 parts of corn starch, 10 parts of plasticizer (glycerin), 3 parts of coupling agent (phenylboronic acid), 0.5 parts of dispersant (calcium stearate) , 0.5 parts of compatibilizer (HDI), 0.1 parts of antioxidant 1010 and 0.1 parts of antioxidant 168.

[0027]Preparation method: Dry PLA, PBAT and starch at 80°C for 4 hours in advance, then weigh the materials according to the above weight ratio, and mix them in a high-speed mixer at 60°C for 25 minutes. Then use a twin-screw extruder to blend and extrude to pelletize. The temperature of the extruder area (from the feed port to the die head) is set to 130°C, 160°C, 160°C, 160°C, 160°C, 160°C, 160°C, 165°C, 165°C, 165°C, 160°C , the feed rate is 30kg / h, and the rotation speed of the extrusion screw is 300rpm. The selected twin-screw extruder is φ35mm×2, L / D=44.

Embodiment 3

[0029] Recipe: 70 parts of PLA (4060D), 20 parts of PBAT (TH801T), 10 parts of corn starch, 3 parts of plasticizer (acetyl triethyl citrate), 1 part of coupling agent (phenylboronic acid), 0.2 parts of dispersant (calcium stearate), 0.2 parts of compatibilizer (TDI), 0.1 part of antioxidant 1010 and 0.1 part of antioxidant 168.

[0030] Preparation method: Dry PLA, PBAT and starch at 80°C for 4 hours in advance, then weigh the materials according to the above weight ratio, and mix them in a high-speed mixer at 60°C for 25 minutes. Then use a twin-screw extruder to blend and extrude to pelletize. The temperature of the extruder area (from the feed port to the die head) is set to 130°C, 160°C, 160°C, 160°C, 160°C, 160°C, 160°C, 165°C, 165°C, 165°C, 160°C , the feed rate is 30kg / h, and the rotation speed of the extrusion screw is 300rpm. The selected twin-screw extruder is φ35mm×2, L / D=44.

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Abstract

The invention provides a starch-filled PLA / PBAT full-biodegradable composite material and a preparation method thereof, and belongs to the field of high polymer materials. A purpose of the invention is to solve the problems of poor toughness, brittleness and easy breaking of polylactic acid and the technical problems of difficult processing of starch, poor compatibility with PLA / PBAT resins and the like. The starch-filled PLA / PBAT full-biodegradable composite material comprises, by weight, 5-90 parts of polylactic acid, 10-90 parts of polyadipic acid / butylene terephthalate, 10-50 parts of starch, 2-15 parts of a plasticizer, 0.1-5 parts of a coupling agent, 0.1-0.5 part of a dispersing agent, 0.1-1 part of a compatibilizer and 0.1-0.5 part of an antioxidant. According to the invention, thepreparation method can be applied to preparation of starch-filled PLA / PBAT full-biodegradable composite materials.

Description

technical field [0001] The invention belongs to the field of polymer materials, in particular to a starch-filled PLA / PBAT fully biodegradable composite material and a preparation method thereof. Background technique [0002] At present, the production development and demand scale of polymer materials are growing rapidly, and the consumption field is expanding. Plastics are gradually replacing various materials and playing an important role in all aspects of our lives. "Replacing steel with plastic and wood with plastic" is more It is a big trend. Therefore, the development and manufacture of environmentally friendly fully biodegradable polymer materials has considerable economic and environmental value in today's global warming and reduction of oil resource reserves. [0003] Polylactic acid (PLA) is a lactic acid monomer formed by microbial fermentation of biomass raw materials. It is a polymer material formed by condensation polymerization or ring-opening polymerization o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08L3/02C08L71/02C08K5/5435C08K5/098C08K5/134C08K5/526C08K5/053C08K5/55C08K5/103C08K5/544
CPCC08L67/02C08L67/04C08L2201/06C08L2205/03C08L2205/035C08L2205/02C08L2203/16C08L3/02C08L71/02C08K5/5435C08K5/098C08K5/1345C08K5/526C08K5/053C08K5/55C08K5/103C08K5/544C08K5/20
Inventor 梁俊雅陈军王凡李双利田洪池
Owner QINGDAO RICH PLASTIC NEW MATERIAL
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