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Graphene oxide hybrid flame retardant and preparation method thereof

A technology of graphene and flame retardants, applied in the field of flame retardants, can solve the problems of difficulty in achieving uniform dispersion of nanomaterials, the inevitable use of a large amount of organic solvents, and low content of surface groups, so as to achieve good peeling effect and avoid re-aggregation , the effect of good mechanical properties

Active Publication Date: 2019-08-20
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Direct blending is difficult to achieve uniform dispersion of nanomaterials, and the method of making masterbatches by solution blending inevitably uses a large amount of organic solvents
On the other hand, although there are some functional groups on the surface of GO that can interact with the PLA matrix through hydrogen bonds, the content of surface groups is low and it is difficult to form a strong interface interaction.

Method used

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  • Graphene oxide hybrid flame retardant and preparation method thereof
  • Graphene oxide hybrid flame retardant and preparation method thereof
  • Graphene oxide hybrid flame retardant and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0045]Add 14.3g of bisphenolic acid, 100mL of ethanol, 20.5g of dimethylamine aqueous solution, and 16.2g of formaldehyde aqueous solution into a three-neck round bottom flask equipped with mechanical stirring and a reflux condenser. Protected by nitrogen gas, the reaction was carried out at 25°C for 24 hours to obtain a light yellow solution. Solvent and unreacted starting material were removed under reduced pressure using a rotary evaporator. Dissolve the yellow solid obtained by rotary evaporation in 200 mL of water, add 5 g of pretreated 732-type cation exchange resin to the aqueous solution, stir for 10 minutes, and filter to obtain the product aqueous solution. The pale yellow solid of bisphenolic acid monomer (BADA) was dried in a vacuum oven at 80°C for 8h. Yield: 90 wt%.

[0046] Add 20.0 g of BADA, 5.1 g of triethylamine and 120 mL of acetonitrile into a flask equipped with a reflux condenser, mechanical stirring, thermometer, and nitrogen protection. The reactant...

Embodiment 2

[0051] Add 14.3g of bisphenolic acid, 100mL of ethanol, 20.5g of dimethylamine aqueous solution, and 16.2g of formaldehyde aqueous solution into a three-neck round bottom flask equipped with mechanical stirring and a reflux condenser. Protected by nitrogen gas, the reaction was carried out at 25°C for 18 hours to obtain a light yellow solution. Solvent and unreacted starting material were removed under reduced pressure using a rotary evaporator. Dissolve the yellow solid obtained by rotary evaporation in 200 mL of water, add 5 g of pretreated 732-type cation exchange resin to the aqueous solution, stir for 15 minutes, and filter to obtain the product aqueous solution. Remove the solvent by rotary evaporation to obtain The pale yellow solid of bisphenolic acid monomer (BADA) was dried in a vacuum oven at 80°C for 8 hours. Yield: 89 wt%.

[0052] Add 20.0 g of BADA, 5.1 g of triethylamine and 120 mL of acetonitrile into a flask equipped with a reflux condenser, mechanical stir...

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Abstract

The invention relates to a graphene oxide hybrid flame retardant and a preparation method thereof. The graphene oxide hybrid flame retardant is characterized in that the preparation raw materials of the flame retardant include ammonium polyphosphate, polyethyleneimine, biphenolic acid based polyphosphate electrolyte and graphene oxide; the three-dimensional spherical structure with negative charge at the outer layer is formed by using the polyethyleneimine as a gas source, the biphenolic acid based polyphosphate electrolyte as a carbon source and the ammonium polyphosphate as an acid source; then, the three-dimensional spherical structure with negative charge and the graphene oxide with the positive charge are adsorbed together through statics to form the flame retardant. The graphene oxide can be uniformly dispersed; the goal of improving the mechanical property of the material is achieved; the efficient flame retardant effect can also be realized.

Description

technical field [0001] The invention relates to the technical field of flame retardants, in particular to a graphene oxide hybrid flame retardant and a preparation method thereof. This type of flame retardant can be used as an efficient flame retardant in the flame retardant field. Background technique [0002] At present, the basic research and application development of flame retardant materials at home and abroad are very active. Flame retardants often need to be added in a relatively high amount (inorganic types are usually not less than 40wt%, phosphorus-containing types are not less than 30wt%) in order to make the material achieve the expected flame retardant effect, the flame retardant efficiency is low, and it will also lead to the material The mechanical properties are greatly damaged. Therefore, the research and development of more efficient and environmentally friendly flame retardants has become one of the key research goals in the field of flame retardants in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/04C08K7/00C08K3/32C08G79/04C08L79/02C08L85/02
Inventor 井健张艳方征平
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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