Composite flame retardant based on carbon microspheres and preparation method thereof

A technology of composite flame retardant and carbon microspheres, which is applied in the field of composite flame retardant and its preparation, can solve the problems of blank state of flame retardancy, achieve good thermal stability and mechanical properties, simple preparation process, wide application range wide range of effects

Active Publication Date: 2013-04-24
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at present, there are many researches mainly on its electrical properties, while the research on its flame retardancy is still blank.

Method used

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  • Composite flame retardant based on carbon microspheres and preparation method thereof
  • Composite flame retardant based on carbon microspheres and preparation method thereof
  • Composite flame retardant based on carbon microspheres and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Weigh 5g of carbon microspheres into a three-necked flask, add 300mL of nitric acid solution with a concentration of 5.943mol / L, and ultrasonically in an ultrasonic disperser with a frequency of 40kHz and a power of 60W for 30min, then raise the temperature to 60°C under stirring, and react at a constant temperature for 30min. Cool to room temperature. The reaction product was suction-filtered and washed with deionized water until the pH value was 7, and the filter cake was dried at 120° C. for 300 min to obtain acidified carbon microspheres.

[0029] Take 2.5g of acidified carbon microspheres into a three-necked flask, add 250mL of N,N-dimethylformamide and 1g of N,N-dicyclohexylcarbodiimide in turn, and ultrasonically After 30 minutes, stir and heat up to 25°C, slowly add 5mL of aniline solution into the three-necked flask, and react for 24 hours. The product was washed with N,N-dimethylformamide and filtered until the washing solution was clear, then washed with dei...

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Abstract

The invention relates to a composite flame retardant based on carbon microspheres and a preparation method thereof. The preparation method comprises the following steps: on the basis of using carbon microspheres and aniline as a flame retardant material, acidizing the carbon microspheres to obtain acidized carbon microspheres; and grafting an aniline organic layer on the surface of the carbon microspheres to prepare the inorganic composite flame retardant. The composite flame retardant provided by the invention is a black powder substance and has good mechanical performance and thermal stability. When the composite flame retardant is used as a polymer flame retardant, the limit oxygen index reaches over 35% and meets the flame retardant standard of a flame retardant material. Meanwhile the mechanical performance of the polymer can be further improved, and the composite flame retardant based on the carbon microspheres has the enhancing and reinforcing effect to a polymer substrate material.

Description

technical field [0001] The invention relates to a composite flame retardant and a preparation method thereof, belonging to the technical field of preparation of inorganic flame retardants. Background technique [0002] Polymer-based composites have many excellent properties, such as high strength, good wear resistance, and low deformation, etc.; and polymer-based composites are cheap, so they are widely used in construction materials, transportation, aerospace, biological medicine and other fields. However, due to the frequent occurrence of fires caused by polymers, the study of their flame retardancy has become a current research hotspot. [0003] There are many types of flame retardants commonly used in polymers, mainly divided into organic flame retardants and inorganic flame retardants. Combustion and decomposition products of organic flame retardants are highly toxic and pollute the environment; inorganic flame retardants include halogenated flame retardants, phosphor...

Claims

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Application Information

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IPC IPC(8): C08K9/10C08K9/04C08K9/02C08K7/18C08K3/04C08L67/02
Inventor 牛梅侯文生李静亚戴晋明王欣任建喜
Owner TAIYUAN UNIV OF TECH
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