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Preparation method of flame-retardant polyamide composite material

A composite material and polyamide technology, which is applied in the field of preparation of flame-retardant polyamide composite materials, can solve problems such as environmental impact and easy generation of smoke, and achieve the goals of reducing impact, improving stability and mechanical properties, and good flame retardancy Effect

Inactive Publication Date: 2021-02-09
合肥通融新型材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The non-antimony flame-retardant polyamide composite material of the present invention can realize the increase of CTI to more than 400V without containing antimony trioxide and zinc borate, and the problem of flow marks will not occur, and the production cost can also be reduced. However, in the present invention Also added 5%-25% of halogenated flame retardants, it is easy to produce smoke when burning, which will affect the environment

Method used

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  • Preparation method of flame-retardant polyamide composite material

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Effect test

Embodiment 1

[0030] A preparation method of flame-retardant polyamide composite material, comprising the following steps:

[0031] (1) Graphene oxide is dispersed in N,N-dimethylformamide with a solid-liquid mass volume ratio of 1 gram: 0.5 milliliters, and ultrasonically treated for 30 minutes to obtain a graphene oxide dispersion;

[0032] (2) Add amine molecules to the graphene oxide dispersion prepared in step (1), heat to 60 degrees Celsius, and magnetically stir for 100 minutes to obtain a graphene solution of surface amination;

[0033] (3) Add maleic anhydride to the solvent, stir, mix and dissolve evenly to form a maleic anhydride solution, feed nitrogen into the maleic anhydride solution to drive away excess oxygen in the solution, and under the protection of nitrogen, add two After vinylbenzene is evenly stirred, the temperature is controlled to 80 degrees Celsius, and at a stirring speed of 300 rpm, the initiator is slowly dripped into it for 30 minutes. After the dripping is c...

Embodiment 2

[0046] A preparation method of flame-retardant polyamide composite material, comprising the following steps:

[0047] (1) Graphene oxide is dispersed in N,N-dimethylformamide with a solid-liquid mass volume ratio of 1 gram: 1.5 milliliters, and ultrasonically treated for 45 minutes to obtain a graphene oxide dispersion;

[0048] (2) Add amine molecules to the graphene oxide dispersion prepared in step (1), heat to 70 degrees Celsius, and magnetically stir for 130 minutes to obtain a graphene solution of surface amination;

[0049] (3) Add maleic anhydride to the solvent, stir, mix and dissolve evenly to form a maleic anhydride solution, feed nitrogen into the maleic anhydride solution to drive away excess oxygen in the solution, and under the protection of nitrogen, add two Vinylbenzene, after stirring evenly, temperature-controlled to 88 degrees Celsius, at a stirring speed of 400 rpm, slowly dripped the initiator therein, and the dripping time was 45 minutes. After the dripp...

Embodiment 3

[0062] A preparation method of flame-retardant polyamide composite material, comprising the following steps:

[0063] (1) Graphene oxide is dispersed in N,N-dimethylformamide with a solid-liquid mass volume ratio of 1 gram: 2 milliliters, and ultrasonically treated for 60 minutes to obtain a graphene oxide dispersion;

[0064] (2) Add amine molecules to the graphene oxide dispersion prepared in step (1), heat to 60-80 degrees Celsius, and magnetically stir for 150 minutes to obtain a surface-aminated graphene solution;

[0065] (3) Add maleic anhydride to the solvent, stir, mix and dissolve evenly to form a maleic anhydride solution, feed nitrogen into the maleic anhydride solution to drive away excess oxygen in the solution, and under the protection of nitrogen, add two After vinylbenzene is evenly stirred, the temperature is controlled to 95 degrees Celsius, and at a stirring speed of 500 rpm, the initiator is slowly added dropwise therein for 60 minutes, and after the dropw...

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Abstract

The invention discloses a preparation method of a flame-retardant polyamide composite material, and relates to the field of high polymer materials. The preparation method comprises the following steps: (1) dispersing graphene oxide in a solvent; (2) preparing graphene subjected to surface amination; (3) preparing divinyl benzene-maleic anhydride copolymer microsphere solid particles; (4) preparingmodified graphene flame-retardant particles; and (5) preparing a flame-retardant polyamide composite material. According to the method, organic groups are introduced to the surface of the graphene oxide, the polarity of the surface of the graphene is improved, the modified graphene flame-retardant particles are coordinated with the phosphorus flame retardant, good flame retardance is achieved, meanwhile, the compatibility of the flame retardant and a polyamide material is improved through modification of the surface of the graphene, and the influence of the flame retardant on the mechanical property of polyamide is reduced.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a method for preparing a flame-retardant polyamide composite material. Background technique [0002] Polyamide, also known as nylon, has always been the top five general-purpose engineering plastics in terms of demand, with an average annual demand growth rate of up to 10%. It has good mechanical properties, durability, corrosion resistance and heat resistance, and is widely used in electrical and electronic, automobile, construction, office equipment, machinery, aerospace and other industries. However, the flame retardant grade of polyamide materials without flame retardant treatment is low, and the fire protection grade can only reach V-2. The excellent flame retardancy can greatly expand the application fields of polyamide materials. [0003] Chinese patent CN102492290B announced a method for preparing a high-strength and high-toughness flame-retardant polyamide, based on 10...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00C08K13/06C08K9/04C08K3/04C08K5/5313C08K5/52
CPCC08K5/5205C08K5/5313C08K9/04C08K9/08C08K13/06C08L2201/02C08K3/042C08L77/00
Inventor 王道军王玉龙付伟
Owner 合肥通融新型材料科技有限公司