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Bio-based degradable flame-retardant polylactic acid engineering material and preparation method thereof

An engineering material, polylactic acid technology, applied in the field of bio-based degradable flame-retardant polylactic acid engineering materials and their preparation, can solve the problems of damaged mechanical properties of materials, increased costs, etc., and achieves improved compatibility, improved dispersibility, low cost effect

Active Publication Date: 2017-01-11
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Among flame retardants, phosphorus-based flame retardants have developed rapidly in recent years. Pack et al. .) Surface modification of starch by coating starch with resorcinol bis(diphenyl phosphate) (RDP) and adding it to polylactic acid, RDP effectively improves the flame retardancy of the composite The compatibility of starch and polylactic acid matrix is ​​improved, but when the UL-94 test level of the system reaches V-0 level, the amount of RDP added reaches 20%, which increases the cost to a certain extent, and the mechanical properties of the material severely damaged

Method used

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  • Bio-based degradable flame-retardant polylactic acid engineering material and preparation method thereof
  • Bio-based degradable flame-retardant polylactic acid engineering material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0024] Weigh 700g of polylactic acid pellets, 300g of surface-treated white wine distillers grains, mix the above pellets in a high-speed mixer, and add them to a torque rheometer under the conditions of conventional temperature and screw speed to melt together. Mix to obtain the polylactic acid engineering material of the present invention. The limiting oxygen index is 18.5%, and there is no droplet phenomenon, but it cannot pass the UL-94 test. The carbon residue rate at 600°C is 10.94%, and the tensile strength is 53.5MPa.

Embodiment 2

[0026] Weigh 700g of polylactic acid pellets, 250g of surface-treated liquor distillers grains, RDP50g, mix the above pellets in a high-speed mixer, and add them to the torque rheometer under the conditions of conventional temperature and screw speed Melt blending to obtain the polylactic acid engineering material of the present invention. The limiting oxygen index is 21.0%, no droplet phenomenon, UL-94 test V-0 level, the carbon residue rate at 600°C is 9.33%, and the tensile strength is 59.4MPa.

Embodiment 3

[0028] Weigh 700g of polylactic acid pellets, 200g of surface-treated liquor distillers grains, and 100g of RDP, mix the above pellets in a high-speed mixer, and add them to the torque rheometer under the conditions of conventional temperature and screw speed Melt blending to obtain the polylactic acid engineering material of the present invention. The limiting oxygen index is 24.5%, no droplet phenomenon, UL-94 test V-0 level, the carbon residue rate at 600°C is 8.32%, and the tensile strength is 56.1MPa.

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Abstract

The invention discloses a bio-based degradable flame-retardant polylactic acid engineering material and a preparation method thereof. The engineering material is prepared by fusion and mixing of polylactic acid, liquor vinasse after surface treatment and high-molecular type phosphorus-containing fire retardant. The mass percent of polylactic acid, the liquor vinasse after surface treatment and the high-molecular type phosphorus-containing fire retardant is 70:(30-5):(0-25). The engineering material has the advantages of simple formula, improved flame retardation efficiency, and excellent mechanical properties of the original material; a stable compact carbon layer is generated during combustion, and droplet phenomenon is effectively inhibited.

Description

technical field [0001] The invention relates to the technical field of flame retardancy and reinforcement of polylactic acid materials, in particular to a bio-based degradable flame-retardant polylactic acid engineering material and a preparation method thereof. Background technique [0002] Biodegradable material is a new type of material developed after the 1980s with the prominent contradictions of environment and energy. As a naturally degradable material, it plays a unique role in environmental protection. Its research and development have been be developed rapidly. Among them, polylactic acid is the most well-known biodegradable material, which is made of starch raw materials proposed by renewable plant resources (such as corn), and can be completely degraded by microorganisms in nature after use, without polluting the environment. Furthermore, polylactic acid has good mechanical and physical properties, and can be applied to various processing methods such as blow mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K5/523
Inventor 王新龙居亚庆廖逢辉史加新代秀曹雨李嘉玮
Owner NANJING UNIV OF SCI & TECH
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