Flame-retardant and antibacterial PLA (polylactic acid) biodegradable composite for 3D (three dimensional) printing

A technology of biodegradable and composite materials, which is applied in the field of flame-retardant and antibacterial PLA biodegradable composite materials, can solve the problems of dust and waste liquid pollution, high corrosion of equipment, and generation of dioxin, etc., and achieves strong bactericidal power, low cost, Long-lasting antibacterial effect

Active Publication Date: 2017-09-12
义乌市筑真电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The halogen-containing flame retardants used in the early stage are very corrosive to equipment during the production process, and at the same time generate dust and waste liquid pollution, and are easy to precipitate during use, producing toxic substances such as dioxins, polluting the environment

Method used

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  • Flame-retardant and antibacterial PLA (polylactic acid) biodegradable composite for 3D (three dimensional) printing
  • Flame-retardant and antibacterial PLA (polylactic acid) biodegradable composite for 3D (three dimensional) printing
  • Flame-retardant and antibacterial PLA (polylactic acid) biodegradable composite for 3D (three dimensional) printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A flame-retardant and antibacterial PLA biodegradable composite material for 3D printing, prepared from the following raw materials by weight:

[0046] The weight average molecular weight is 5×10 5g / molPLA 100 parts

[0047] 5 parts sodium bicarbonate

[0048] Chitosan biguanide hydrochloride 10 parts

[0049] Carboxylic liquid nitrile rubber 3 parts

[0050] The mass ratio of antioxidant 1010 and diphenyloctyl phosphite is 0.5 part of antioxidant composed of 4:1

[0051] Ethylene-methacrylate-glycidyl ester 0.5 parts

[0052] 1 part pentaerythritol stearate

[0053] DOPO derivative flame retardant 5-10 parts

[0054] Among them, the structural formula of DOPO derivative flame retardant is:

[0055]

[0056] The synthetic steps of described DOPO derivative flame retardant are:

[0057] (1) 7.5g of biphenylphosphoramidate and 6.8g of 8-trifluoromethylquinoline-2-carbaldehyde were heated in 85.5g of ethanol at 70°C for 6h. After the reaction was over, the inter...

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Abstract

The invention relates to the field of polymer materials, in particular to a flame-retardant and antibacterial PLA (polylactic acid) biodegradable composite for 3D (three dimensional) printing. The composite is prepared from the following raw materials in parts by weight: 100 parts of PLA, 2-10 parts of a nucleating agent, 5-10 parts of a natural macromolecule antibacterial agent, 1-5 parts of a toughening agent, 0.3-0.8 part of an antioxidant, 0.5-1 part of a compatibilizer, 0.5-1.5 parts of a lubricant and 5-10 parts of a DOPO (9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) derivative flame retardant. According to the flame-retardant and antibacterial PLA biodegradable composite for 3D printing, the DOPO derivative flame retardant and the natural macromolecule antibacterial agent are added to a PLA composite system, so that on the one hand, the PLA composite is endowed with a lasting and broad antibacterial property by the natural macromolecule antibacterial agent, bactericidal power is high, performance is stable, biodegradation is facilitated, and secondary pollution can be prevented; on the other hand, when content of the flame retardant reaches 5%-10%, a cured product can reach the level of UL94, V-0.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a flame-retardant and antibacterial PLA biodegradable composite material for 3D printing. Background technique [0002] 3D printing technology, also known as laminated manufacturing technology, is an emerging technology in the field of rapid prototyping. Techniques for constructing objects. The basic principle is additive manufacturing, the technique of adding material layer by layer to generate a three-dimensional solid. At present, 3D printing technology is mainly used in product prototyping, mold manufacturing, art creation, jewelry making and other fields, replacing these traditional fine processing techniques. In addition, 3D printing technology is gradually applied in fields such as medicine, bioengineering, architecture, clothing, aviation, etc., opening up a broad space for innovation. [0003] At present, the polymer materials commonly used in melt extrusion accumulat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L5/08C08L23/08C08K13/02C08K5/5399B29C47/92B33Y70/00C07F9/6574B29C48/92
CPCB29C48/92B29C2948/9258B29C2948/92704B33Y70/00C07F9/657172C08L67/04C08L2201/02C08L2201/06C08L2205/035C08L2205/24C08L5/08C08L23/0884C08K13/02C08K5/5399
Inventor 吴新贤
Owner 义乌市筑真电子科技有限公司
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