A kind of biodegradable toughened composite material and preparation method thereof

A toughened composite material and biodegradation technology, applied in the field of biodegradable toughened composite materials and their preparation, can solve problems such as poor dispersion state and poor compatibility

Active Publication Date: 2021-04-27
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a filler, its dispersion state is not good, and the compatibility with the matrix is ​​poor

Method used

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  • A kind of biodegradable toughened composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] After the modified carbon nanotubes, polylactic acid and polyadipate / terephthalate were vacuum-dried at 80°C for 8 hours, the polylactic acid 79.68%, polyadipate / terephthalate 19.92% butylene formate, 0.4% bis-(tert-butylperoxyisopropyl) benzene, and 0% modified carbon nanotubes are mechanically mixed, then added to the twin-screw extruder, and the temperature in the first zone is controlled at 170~ 175°C, the temperature control of the second zone is 185~190°C, the temperature control of the third zone is 190~195°C, the temperature control of the fourth zone is 195~200°C, the screw speed is 30r / min, the cycle time is 7min, extrusion to injection Injection molding in the barrel, the mold temperature is 40°C, the injection barrel temperature is 205°C, the injection pressure is 0.6~0.7MPa, the holding pressure is 0.6~0.7MPa, and the mold closing time is 25~30s.

Embodiment 2

[0027] After the modified carbon nanotubes, polylactic acid and polyadipate / butylene terephthalate were vacuum-dried at 80°C for 8 hours, the polylactic acid 79.36%, polyadipate / terephthalate 19.84% butylene formate, 0.4% bis-(tert-butylperoxyisopropyl) benzene, and 0.4% modified carbon nanotubes are mechanically mixed, then added to the twin-screw extruder, and the temperature in the first zone is controlled at 170~ 175°C, the temperature control of the second zone is 185~190°C, the temperature control of the third zone is 190~195°C, the temperature control of the fourth zone is 195~200°C, the screw speed is 30r / min, the cycle time is 7min, extrusion to injection Injection molding in the barrel, the mold temperature is 40°C, the injection barrel temperature is 205°C, the injection pressure is 0.6~0.7MPa, the holding pressure is 0.6~0.7MPa, and the mold closing time is 25~30s.

Embodiment 3

[0029] After the modified carbon nanotubes, polylactic acid and polyadipate / butylene terephthalate were vacuum-dried at 80°C for 8 hours, the polylactic acid 79.04%, polyadipate / terephthalate 19.76% butylene formate, 0.4% bis-(tert-butylperoxyisopropyl)benzene, and 0.8% modified carbon nanotubes are mixed mechanically and then added to the twin-screw extruder. The temperature in the first zone is controlled at 170~ 175°C, the temperature control of the second zone is 185~190°C, the temperature control of the third zone is 190~195°C, the temperature control of the fourth zone is 195~200°C, the screw speed is 30r / min, the cycle time is 7min, extrusion to injection Injection molding in the barrel, the mold temperature is 40°C, the injection barrel temperature is 205°C, the injection pressure is 0.6~0.7MPa, the holding pressure is 0.6~0.7MPa, and the mold closing time is 25~30s.

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Abstract

The invention discloses a biodegradable and toughened composite material and a preparation method thereof, belonging to the field of material technology, and comprises modified carbon nanotubes, polylactic acid, polyadipate / butylene terephthalate and di-( tert-butylperoxycumyl) benzene is used as a raw material, and the biodegradable toughened composite material is obtained through extrusion injection molding. Among them, the acidified carbon nanotubes are treated with a silane coupling agent to improve the dispersion of conventional carbon nanotubes and the bonding with the matrix, and the use of di-(tert-butylperoxyisopropyl)benzene can improve Compatibility of polylactic acid and polybutylene adipate / terephthalate. The preparation method of the biodegradable toughened composite material of the present invention is simple, the toughness is greatly improved, and can be applied to the fields of automobiles, packaging, electronics, aerospace and the like.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a biodegradable toughened composite material and a preparation method thereof. Background technique [0002] Polylactic acid (PLA) is a biodegradable and environmentally friendly material derived from starch extracted from plants (corn, cassava, sugar beet, etc.). Polylactic acid can be degraded in a humid environment or in a microbial environment, and produces water and carbon dioxide that are not harmful to the environment. However, polylactic acid has poor toughness, plasticity and heat resistance, which limits its application in many aspects. [0003] Polybutylene adipate / terephthalate (PBAT) is a biodegradable material synthesized from petrochemical products. It has good ductility, heat resistance, and toughness, but low strength and low modulus. The mechanical properties of polylactic acid and polyadipate / terephthalic acid diester are completely opposite, so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L67/02C08K13/06C08K9/06C08K3/04C08K5/14
CPCC08K2201/011C08L67/04C08L2201/06C08L2205/02C08L2205/06C08L2205/08C08L67/02C08K13/06C08K9/06C08K3/041C08K5/14
Inventor 卢月美施企明刘建仁
Owner FUZHOU UNIV
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