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Environment-friendly flame-retardant PLA plastic and preparation method thereof

An environmentally friendly, flame-retardant plastic technology, applied in the field of flame-retardant plastics, can solve the problems of harsh preparation conditions, low flame-retardant performance, toxic substances, etc., to ensure biocompatibility, excellent flame-retardant performance, good mechanical properties performance effect

Active Publication Date: 2020-07-28
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the environmental problems of most flame-retardant plastics need to be solved urgently, or there are problems such as low flame-retardant performance and difficult preparation methods.
For example: Chinese patent CN110408162A uses bromine-containing flame retardants and phosphorus-containing flame retardants together. Although they have good flame-retardant properties, bromine-containing flame retardants are prone to produce toxic substances during the flame-retardant process, which increases the difficulty of fire rescue. Reduce the survival rate of personnel; although the composite plastic prepared in Chinese patent CN106987081A does not contain halogen, its limiting oxygen index is low, and the operation is cumbersome; additives, curing agents, and most of the additives cannot be recycled, which is likely to cause ecological problems, and the preparation process is more complicated, the preparation conditions are more stringent, and it is not easy to promote

Method used

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  • Environment-friendly flame-retardant PLA plastic and preparation method thereof
  • Environment-friendly flame-retardant PLA plastic and preparation method thereof
  • Environment-friendly flame-retardant PLA plastic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of environmentally friendly PLA fire-retardant plastics, its preparation method comprises the steps:

[0037] 1) Dissolve 0.72 parts of phytic acid in 50 parts of water, add 4.28 parts of furfurylamine, stir and react for 30 minutes under nitrogen atmosphere and room temperature, remove water by rotary evaporation, and dry at 60°C for 6 hours to obtain a composite environmentally friendly flame retardant;

[0038] 2) Put 5 parts of the obtained composite environmentally friendly flame retardant and 95 parts of PLA into the torque rheometer, the mixing temperature is 180 ° C, and the mixing speed is gradually increased from 10 rpm to 100 rpm in increments of 15 rpm; The mixing time of each section is 30s. After the speed is increased to 100rpm, continue mixing for 10 minutes to obtain compound 1; send compound 1 into the screw extruder, and extrude the compound at 185°C and 10Mpa. The material is shredded to obtain the environmentally friendly flame-retardant PLA ...

Embodiment 2

[0041] A kind of environmentally friendly PLA fire-retardant plastics, its preparation method comprises the steps:

[0042] 1) Dissolve 1.25 parts of phytic acid in 50 parts of water, add 6.25 parts of furfurylamine, stir and react for 30 minutes under nitrogen atmosphere and room temperature, remove water by rotary evaporation, and dry at 60°C for 6 hours to obtain a composite environmentally friendly flame retardant;

[0043] 2) Put 7.5 parts of the obtained composite environmentally friendly flame retardant and 92.5 parts of PLA into the torque rheometer, the mixing temperature is 180 ° C, and the mixing speed is gradually increased from 10 rpm to 100 rpm in increments of 15 rpm; The mixing time of each section is 30s. After the speed is increased to 100rpm, continue mixing for 10 minutes to obtain compound 1; send compound 1 into the screw extruder, and extrude the compound at 185°C and 10Mpa. The material is shredded to obtain the environmentally friendly flame-retardant ...

Embodiment 3

[0045] A kind of environmentally friendly PLA fire-retardant plastics, its preparation method comprises the steps:

[0046] 1) Dissolve 1.43 parts of phytic acid in 50 parts of water, add 8.57 parts of furfurylamine, stir and react for 30 minutes under nitrogen atmosphere and room temperature, remove water by rotary evaporation, and dry at 60°C for 6 hours to obtain a composite environmentally friendly flame retardant;

[0047] 2) Put 10 parts of the obtained composite environmentally friendly flame retardant and 90 parts of PLA into the torque rheometer, the mixing temperature is 180 ° C, and the mixing speed is gradually increased from 10 rpm to 100 rpm in increments of 15 rpm; The mixing time of each section is 30s. After the speed is increased to 100rpm, continue mixing for 10 minutes to obtain compound 1; send compound 1 into the screw extruder, and extrude the compound at 185°C and 10Mpa. The material is shredded to obtain the environmentally friendly flame-retardant PLA...

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Abstract

The invention discloses an environment-friendly PLA flame-retardant plastic which is prepared by taking a composite environment-friendly flame retardant and polylactic acid as raw materials and sequentially performing mixing and extrusion molding, wherein the composite environment-friendly flame retardant is generated by a reaction between phytic acid and furfuryl amine under a stirring condition.The composite environment-friendly flame retardant is applied to preparation of the PLA plastic product, and free radicals required by a combustion reaction can be effectively captured during pyrolysis or combustion, so that the combustion reaction is inhibited; meanwhile, all the raw materials are pollution-free to the environment, the application field of the PLA material can be further widened, and the fire resistance and the stability of the PLA material can be effectively improved; and the related preparation method is simple, wide in raw material source and suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant plastics, and in particular relates to an environment-friendly flame-retardant PLA plastic and a preparation method thereof. Background technique [0002] As a biodegradable polymer, polylactic acid (PLA) has attracted increasing attention. PLA is very environmentally friendly and can be derived entirely from renewable resources such as sugar and cornstarch. PLA can be used to produce fibers, extruded films, and injection molded products, which have a wide range of applications in commodity plastics, packaging materials, biomaterials, and textile fibers. However, the flammability of PLA has great limitations on its application and development in many important fields. In view of this situation, measures should be taken to improve its flame retardancy in order to expand the application of PLA. [0003] For the currently commonly used flame retardant systems, the N-P flame retardant system...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08K5/521C08K5/17
CPCC08K5/17C08K5/521C08L2201/02C08L67/04
Inventor 刘治田叶国锋霍思奇
Owner WUHAN INSTITUTE OF TECHNOLOGY
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