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Preparing method of phosphorus nitrogen high load graphene flame retardant

A graphene and high-load technology, which is applied in the field of preparation of graphene flame retardants with high phosphorus and nitrogen loads, can solve the problems that graphene and flame retardants are difficult to disperse evenly and affect the synergistic flame retardant effect, and achieve a wide range of applications , improve the mechanical properties, the effect of stable performance

Active Publication Date: 2016-03-23
浙江迪恩新材料有限公司
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AI Technical Summary

Problems solved by technology

However, this system is only obtained through simple physical blending of the two. It is difficult to achieve uniform dispersion of graphene and flame retardants in the polymer matrix, which seriously affects the synergistic flame retardant effect of the two in the combustion process of the material.

Method used

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  • Preparing method of phosphorus nitrogen high load graphene flame retardant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Synthesis of isocyanate-functionalized graphene: Add 1.0g of graphene oxide powder particles into 200mL of chloroform, ultrasonically disperse for 120 minutes, and then transfer to a drying oven equipped with mechanical stirring, thermometer, reflux condenser and dropping funnel. In a 250mL four-necked flask, add 0.05g of isophorone diisocyanate at room temperature, raise the temperature to 45°C, continue to stir and react for 5 hours, then filter the slurry obtained from the reaction, wash repeatedly with chloroform, and dry to obtain isocyanate function Graphene.

[0023] 2. Synthesis of dendrimer functionalized graphene: disperse 1.0 g of the above-mentioned isocyanate functionalized graphene into 80 mL of acetonitrile, then add 0.5 g of the first generation of PAMAM, react at 20 ° C for 10 hours, and then react to obtain The slurry was filtered to obtain a black solid powder, and after drying, dendrimer functionalized graphene was obtained.

[0024] 3. Synthesis...

Embodiment 2

[0026] 1. Synthesis of isocyanate-functionalized graphene: the synthesis operation is the same as in Example 1, except that the isocyanate is diphenylmethane diisocyanate, and the reaction temperature between graphene oxide and diphenylmethane diisocyanate is 90°C, and the reaction time is 2 hours, the mass ratio of graphene oxide to diphenylmethane diisocyanate is 1.0:0.3, and the solvent is ethyl acetate.

[0027] 2. Synthesis of dendrimer functionalized graphene: disperse 1.0 g of isocyanate functionalized graphene prepared by the above reaction into 80 mL of N,N-dimethylformamide, and then add the second-generation polyamide-amine PAMAM to make the isocyanate The mass ratio of functionalized graphene to second-generation polyamide-amine is 1.0:2.0, and the mixture is reacted at 50°C for 3.5 hours, and then the slurry obtained from the reaction is filtered to obtain a black solid powder, which is dried to obtain dendrimer functionalized Graphene.

[0028] 3. Synthesis of g...

Embodiment 3

[0031] 1. Synthesis of isocyanate functionalized graphene:

[0032] The synthesis operation is the same as in Example 1, except that the isocyanate is hexamethylene diisocyanate, the reaction temperature between graphene oxide and hexamethylene diisocyanate is 35°C, and the reaction time is 4 hours. The mass ratio of methyl diisocyanate is 1.0:0.01, and the solvent is toluene.

[0033] 2. Synthesis of dendrimer functionalized graphene:

[0034] The synthetic operation is the same as that in Example 1, the difference being that the reaction temperature between the isocyanate-functionalized graphene and the polyamide-amine is 90° C., the reaction time is 3 hours, and the mass ratio of the isocyanate-functionalized graphene to the first-generation polyamide-amine is The ratio is 1.0:1.0, and the solvent is chloroform.

[0035] 3. Synthesis of graphene flame retardant with high phosphorus and nitrogen loading:

[0036] The synthesis operation is the same as in Example 1, except t...

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Abstract

The invention relates to a preparing method of a flame retardant, in particular to a preparing method of a phosphorus nitrogen high load graphene flame retardant. The method comprises the following steps: (1) performing a surface grafting reaction on isocyanate and graphene oxide to prepare isocyanate functionalized graphene; (2) reacting the isocyanate functionalized graphene with dendrimer polyamide-amine (PAMAM) to prepare dendrimer functionalized graphene; (3) reacting the dendrimer functionalized graphene with a phosphoryl chloride compound to prepare the phosphorus nitrogen high load graphene flame retardant. The phosphorus nitrogen high load graphene flame retardant can retard flaming of a modified high polymer material and can improve mechanical properties of the high polymer material.

Description

technical field [0001] The invention relates to a preparation method of a flame retardant, in particular to a preparation method of a phosphorus-nitrogen high-loaded graphene flame retardant. Background technique [0002] With the deepening of research on polymer / graphene nanocomposites, the flame retardancy of polymer / graphene nanocomposites has attracted widespread attention from scholars at home and abroad. As a new type of flame retardant material, compared with traditional filled polymers, it has the advantages of high flame retardant efficiency, environmental protection, low toxicity, and excellent comprehensive performance. Compared with traditional filled polymers, polymer / graphene nanocomposites have the advantages of less addition amount and high flame retardant efficiency, but their application range is severely limited due to the lower flame retardant level. In order to further improve the flame retardant properties of polymer / graphene nanocomposites, graphene a...

Claims

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Application Information

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IPC IPC(8): C08K9/04C08K3/04
CPCC08K3/04C08K9/04
Inventor 黄国波方国忠吴鸿飞
Owner 浙江迪恩新材料有限公司
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