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Preparation method of PBAT/PLA/CaCO3 full-biodegradable composite material

A composite material and all-biological technology, which is applied in the field of preparation of PBAT/PLA/CaCO3 fully biodegradable composite materials, can solve the problems of composite materials such as the decline in mechanical properties, poor interface compatibility, and easy aggregation of inorganic powders to achieve good appearance and Mechanical properties, beneficial to market promotion, the effect of excellent mechanical properties

Pending Publication Date: 2022-03-22
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor interfacial compatibility of the three materials, and the problems of easy agglomeration and poor dispersion of the inorganic powder, the mechanical properties of the composite material will eventually decrease, which cannot fully meet the application requirements.

Method used

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  • Preparation method of PBAT/PLA/CaCO3 full-biodegradable composite material
  • Preparation method of PBAT/PLA/CaCO3 full-biodegradable composite material
  • Preparation method of PBAT/PLA/CaCO3 full-biodegradable composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A PBAT / PLA / CaCO 3 Fully biodegradable composite material, including the following steps:

[0034] (1) Preparation of modified inorganic filler: Take 20 parts of calcium carbonate and dry it in a vacuum drying oven at 80°C for 12 hours. After drying, add 0.20 parts of titanate coupling agent and react in a high-speed mixer at 100°C for 20 minutes to obtain activated carbonic acid calcium.

[0035] (2) Preparation of PBAT-based fully degradable materials: First, dry 75 parts of PBAT and 5 parts of PLA in a vacuum drying oven at 80°C for 12 hours, add 0.75 parts of ADR chain extender to the dried PBAT, mix well and then add banburying In the machine, the speed of the internal mixer is 50r / min, the temperature is 170°C, and the time is 5min; then, the internal mixer and the micro-injection molding machine are used to blend and inject PBAT, PLA and CaCO3 with different mass ratios to prepare dumbbell-shaped splines. The speed of the internal mixer is 50r / min, the temperatu...

Embodiment 2

[0038] A PBAT / PLA / CaCO 3 Fully biodegradable composite material, including the following steps:

[0039] (1) Preparation of modified inorganic filler: Take 25 parts of calcium carbonate and dry it in a vacuum drying oven at 80°C for 12 hours. After drying, add 0.25 parts of titanate coupling agent and react in a high-speed mixer at 100°C for 20 minutes to obtain activated carbonic acid calcium.

[0040](2) Preparation of PBAT-based fully degradable materials: First, dry 70 parts of PBAT and 5 parts of PLA in a vacuum drying oven at 80°C for 12 hours, add 0.7 parts of ADR chain extender to the dried PBAT, mix well and then add banburying In the machine, the speed of the internal mixer is 50r / min, the temperature is 170°C, and the time is 5min; then, the internal mixer and the micro-injection molding machine are used to blend and inject PBAT, PLA and CaCO3 with different mass ratios to prepare dumbbell-shaped splines. The speed of the internal mixer is 50r / min, the temperature...

Embodiment 3

[0043] A PBAT / PLA / CaCO 3 Fully biodegradable composite material and preparation method thereof, comprising the following steps:

[0044] (1) Preparation of modified inorganic filler: Take 30 parts of calcium carbonate and dry it in a vacuum oven at 80°C for 12 hours. After drying, add 0.3 parts of titanate coupling agent and react in a high-speed mixer at 100°C for 20 minutes to obtain activated carbonic acid calcium.

[0045] (2) Preparation of PBAT-based fully degradable materials: First, dry 65 parts of PBAT and 5 parts of PLA in a vacuum drying oven at 80°C for 12 hours, add 0.65 parts of ADR chain extender to the dried PBAT, mix well and add banburying In the mixer, the speed of the internal mixer is 50r / min, the temperature is 170°C, and the time is 5min; then, the chain-extended PBAT, PLA and CaCO 3 Dumbbell-shaped splines were prepared by blending injection molding. The speed of the internal mixer was 50r / min, the temperature was 170°C, and the time was 10min. The te...

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Abstract

The invention discloses a preparation method of a PBAT / PLA / CaCO3 full-biodegradable composite material, PBAT, PLA and calcium carbonate are used as main raw materials, the inherent biodegradable property of the raw materials is not destroyed, and the material has the advantage of complete biodegradability. The introduction of a small amount of PLA endows the composite material with high strength, and the addition of calcium carbonate greatly reduces the production cost of the composite material while improving the strength of the composite material, is beneficial to industrial production, and achieves the purposes of environmental protection and energy saving; the processing technology of the composite material is simple, and a compatilizer and a plasticizer do not need to be added.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to a PBAT / PLA / CaCO 3 A method for preparing a fully biodegradable composite material. Background technique [0002] Traditional plastic waste cannot degrade itself, causing serious white pollution and causing great harm to the ecological environment. It is the general trend to develop plastics that can be degraded in nature. As a thermoplastic biodegradable material, PBAT contains both flexible aliphatic chains and rigid aromatic chains in the molecular chain. Therefore, the material has good ductility, elongation at break, impact performance and heat resistance, and can be used as a traditional film An effective substitute for materials, in line with the government's environmental protection management ideas, has broad development prospects. [0003] Although PBAT has excellent performance, it is expensive, and its defects such as low tensile strength and modulus limit ...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04C08K3/26
CPCC08L67/02C08K2003/265C08L2201/04C08L67/04C08K3/26Y02W90/10
Inventor 苗继斌张潜夏茹曹明钱家盛杨斌陈鹏伍斌苏丽芬郑争志葛倩倩
Owner ANHUI UNIVERSITY
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