Phosphorus-nitrogen flame retardant functionalized graphene and preparation method thereof

A flame retardant and graphene technology, which is applied in the field of phosphorus-nitrogen flame retardant functionalized graphene and its preparation, can solve the problems of restricting the application of graphene, difficult matrix dispersion, weak matrix force, etc., and achieve good application Foreground, easy to control, high char effect

Inactive Publication Date: 2018-07-20
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a strong van der Waals force between the graphene sheets, and it is easy to agglomerate and accumulate after reduction, and the force between the graphene and the matrix is ​​weak, so it is difficult to obtain a good dispersion in the matrix, which directly limits the use of gra

Method used

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  • Phosphorus-nitrogen flame retardant functionalized graphene and preparation method thereof
  • Phosphorus-nitrogen flame retardant functionalized graphene and preparation method thereof
  • Phosphorus-nitrogen flame retardant functionalized graphene and preparation method thereof

Examples

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Example Embodiment

[0036] Examples are as follows:

[0037] The experimental materials used in this example can be easily obtained from commercial companies unless otherwise specified.

[0038] The first is to obtain graphene oxide (GO) with reference to Hummers method and with a few modifications:

[0039] (1) 5g of graphite was mixed with 2.5g of sodium nitrate and added to 250mL of concentrated sulfuric acid, and then 15g of potassium permanganate was added under the condition of mechanical stirring. The above operations were all carried out in an ice-water mixed bath to prevent the reaction from being too violent, and the temperature was controlled below 25°C.

[0040] (2) After the ice-water mixed bath was removed, the reaction temperature was increased to 35° C., and then mechanically stirred for 12 h. At this time, the reaction system showed a brown paste.

[0041] (3) After the temperature of the reaction system was lowered to room temperature, it was transferred to an ice-water mixed...

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Abstract

The invention discloses a phosphorus-nitrogen flame retardant functionalized graphene and a preparation method thereof. The above substance is characterized in that the structure of the substance is represented by formula (I) shown in the description, and m and n in the formula (I) are integers in a range of 1 to 300. Modified graphene oxide weakens the strong interaction between layers of original graphene oxide, so the dispersion condition is greatly improved. Acylamino groups and phosphoramido groups on the surface of the modified graphene oxide have strong polarity, so the interaction between the modified graphene oxide and a PLA segment is greatly enhanced, thereby the dispersibility in the matrix is improved.

Description

technical field [0001] The invention relates to a phosphorus nitrogen type flame retardant functionalized graphene and a preparation method thereof. This kind of functionalized graphene can be applied in the field of flame-retardant polymer materials, and this kind of polymer does not contain halogen, and belongs to the environment-friendly flame retardant. Background technique [0002] Graphene is a new carbonaceous material in which carbon atoms are tightly packed into a single-layer two-dimensional honeycomb lattice structure. It has the characteristics of high strength, high electrical conductivity, and high specific surface area. It is widely used in the field of polymer-based composite materials. However, there is a strong van der Waals force between the graphene sheets, and it is easy to agglomerate and accumulate after reduction, and the force between the graphene and the matrix is ​​weak, and it is difficult to obtain a good dispersion in the matrix, which directly ...

Claims

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Application Information

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IPC IPC(8): C08G83/00C08L67/04
CPCC08G83/001C08L67/04C08L2201/02C08L87/00
Inventor 方芳冉诗雅方征平郭正虹
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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