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Flame retardant bio-based polyester and preparation method thereof

A polyester-based and bio-based technology, applied in the field of flame-retardant materials, can solve the problems of uneven dispersion of graphene substrates, affecting the flame-retardant effect of materials, and easy melting and dripping, so as to achieve the suppression of candle wick effect and flame-retardant efficiency High, improve the effect of melt viscosity

Inactive Publication Date: 2018-08-21
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, biomass polyester is flammable and easy to melt and drip, which limits its application in the engineering field
At present, the flame retardant research on PBS mainly focuses on graphene and fumed silica, but graphene is easy to agglomerate, which leads to its uneven dispersion in the substrate, which in turn affects the flame retardant effect of the material, while fumed silica Whether it causes silicosis is still controversial

Method used

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  • Flame retardant bio-based polyester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of a Flame Retardant Bio-Based Polyester

[0028] (1) Disperse 0.45g of aminated carbon nanotubes in 0.45L of N,N-dimethylformamide solution, and ultrasonicate for 20min at 100W to obtain a carbon nanotube dispersion, wherein N,N-dimethylformamide The volume ratio of N,N-dimethylformamide and water in the amide solution is 2:1;

[0029] (2) Disperse 4.5g of ammonium polyphosphate with a degree of polymerization greater than 1000 and in the form of white powder in 0.45L of deionized water, and ultrasonicate for 30min at 100W to prepare an ammonium polyphosphate dispersion;

[0030] (3) the ammonium polyphosphate dispersion liquid prepared in step (2) is added dropwise in the carbon nanotube dispersion liquid prepared in step (1) by the speed of 10mL / min, wash with water and ethanol alternately after mixing, Each was washed 3 times, and dried at 60°C for 6 hours after suction filtration to obtain a carbon nanotube flame retardant;

[0031] (4) 100 parts of p...

Embodiment 2

[0033] Preparation of a Flame Retardant Bio-Based Polyester

[0034] (1) Disperse 0.45g of aminated carbon nanotubes in 22.5L of N,N-dimethylformamide solution, and ultrasonicate for 20min at 100W to obtain a carbon nanotube dispersion, wherein N,N-dimethylformamide The volume ratio of N,N-dimethylformamide and water in the amide solution is 2:1;

[0035] (2) Disperse 4.5g of ammonium polyphosphate with a degree of polymerization greater than 1000 and in the form of white powder in 0.18L of deionized water, and ultrasonicate for 30min at 100W to prepare an ammonium polyphosphate dispersion;

[0036] (3) the ammonium polyphosphate dispersion liquid prepared in step (2) is added dropwise in the carbon nanotube dispersion liquid prepared in step (1) by the speed of 1mL / min, wash with water and ethanol alternately after mixing, Each was washed twice, and dried at 70°C for 4 hours after suction filtration to obtain a carbon nanotube flame retardant;

[0037] (4) After mixing 100 ...

Embodiment 3

[0039] Preparation of a Flame Retardant Bio-Based Polyester

[0040] (1) Disperse 0.45g of aminated carbon nanotubes in 45L of N,N-dimethylformamide solution, and ultrasonicate for 20min at 100W to obtain a carbon nanotube dispersion, wherein N,N-dimethylformamide The volume ratio of N,N-dimethylformamide and water in the solution is 2:1;

[0041] (2) Disperse 4.5g of ammonium polyphosphate with a degree of polymerization greater than 1000 and in the form of white powder in 0.09L of deionized water, and ultrasonicate for 30min at 100W to prepare an ammonium polyphosphate dispersion;

[0042] (3) the ammonium polyphosphate dispersion liquid prepared in step (2) is added dropwise in the carbon nanotube dispersion liquid prepared in step (1) by the speed of 5mL / min, wash with water and ethanol alternately after mixing, Each was washed 3 times, and dried at 80°C for 2 hours after suction filtration to obtain a carbon nanotube flame retardant;

[0043] (4) After mixing 100 parts ...

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Abstract

The invention relates to flame retardant bio-based polyester and a preparation method thereof, and belongs to the technical field of flame retardant materials. The flame retardant bio-based polyesteris prepared from the following components in parts by mass: 100 parts of polybutylene succinate, 10 to 15 parts of ammonium polyphosphate and 0.5 to 2 parts of carbon nanotube flame retardant, whereinthe polybutylene succinate is used as a matrix material and can be completely biodegraded; the ammonium polyphosphate is an acid source and an air source and is heated and decomposed to generate polymetaphosphate; meanwhile, the ammonium polyphosphate can generate inert gas (ammonia) which provides the air source for expanding a carbon layer; the expanded carbon layer can block a combustion-supporting substance (oxygen) to a certain extent, and thereby a flame-retardant effect is achieved; the carbon nanotube flame retardant is regarded as the acid source, the carbon source and the air source, and has the effects of resisting molten droplets and inhibiting a candlewick effect. The flame retardant bio-based polyester has high flame retardant efficiency, is environment-friendly and is obtained by melt blending and granulating through a twin-screw extruder. The preparation process of the flame retardant bio-based polyester is simple and can adapt to large-scale industrialized production.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant materials, and in particular relates to a flame-retardant bio-based polyester and a preparation method thereof. Background technique [0002] Polybutylene succinate (PBS) can be produced by bio-fermentation of bio-waste such as corn ears and crop stalks. It is easily decomposed into carbon dioxide and water by various microorganisms in nature. It is a typical fully biodegradable polymer material. It has good biocompatibility and belongs to bio-based polyester. However, biomass polyester is flammable and easy to melt and drip, which limits its application in the engineering field. At present, the flame retardant research on PBS mainly focuses on graphene and fumed silica, but graphene is easy to agglomerate, which leads to its uneven dispersion in the substrate, which in turn affects the flame retardant effect of the material, while fumed silica Whether it causes silicosis is still contro...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08K3/32C08K9/10C08K3/04B29C47/92B29C48/92
CPCB29C48/92B29C2948/92704C08K3/041C08K3/32C08K9/10C08K2003/323C08L2201/02C08L2201/06C08L67/02
Inventor 黄进岳军锋刘昌华甘霖
Owner SOUTHWEST UNIVERSITY
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