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A kind of preparation method of reactive carbon nanotube flame retardant

A carbon nanotube and flame retardant technology, which is applied in the field of preparation of reactive carbon nanotube flame retardants, can solve problems such as the inability to improve the flame retardant performance of a composite system.

Inactive Publication Date: 2018-08-21
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When traditional organic compounds are used as covalent modifiers, although it can weaken the aggregation tendency of carbon nanotubes caused by van der Waals force and improve their dispersion in the matrix, due to the flammability of organic compounds, it is often impossible to improve the recombination. The purpose of the flame retardant performance of the system

Method used

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  • A kind of preparation method of reactive carbon nanotube flame retardant
  • A kind of preparation method of reactive carbon nanotube flame retardant
  • A kind of preparation method of reactive carbon nanotube flame retardant

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The preparation method of reactive carbon nanotube flame retardant in the present embodiment comprises the following steps:

[0029] (1) Preparation of polysiloxane

[0030] Measure 15mL of ethanol and 5mL of deionized water, add 0.2g of aminopropyltriethoxysilane, 0.2g of vinyltrimethoxysilane, and 2g of phenyltrimethoxysilane, and stir well; slowly add four Methylammonium hydroxide, control the pH value of the reaction solution to 8, stir and react at room temperature for 4h; after the reaction is completed, collect the product through a rotary evaporator, and finally dry it in vacuum at room temperature to obtain polysilicon containing amino, vinyl, and phenyl Oxygen;

[0031] (2) Preparation of reactive carbon nanotube flame retardant

[0032] Mix 200 mg of carboxylated multi-walled carbon nanotubes with 20 mL of thionyl chloride and 1 mL of DMF, and perform ultrasonic treatment to fully disperse the carbon nanotubes into the solution, and react for 24 hours under...

Embodiment 2

[0037] The preparation method of reactive carbon nanotube flame retardant in the present embodiment comprises the following steps:

[0038] (1) Preparation of polysiloxane

[0039] Measure 30mL of ethanol and 10mL of deionized water, add 0.5g of aminopropyltrimethoxysilane, 0.2g of vinylmethyldimethoxysilane, and 1g of phenyltrimethoxysilane, and stir well; Add tetraethylammonium hydroxide, control the pH value of the reaction solution to 10, and stir the reaction at room temperature for 6 hours; after the reaction is completed, the product is collected by a rotary evaporator, and finally vacuum-dried at room temperature to obtain amino, vinyl, and phenyl compounds. Polysiloxane;

[0040] (2) Preparation of reactive carbon nanotube flame retardant

[0041]Mix 200 mg of carboxylated multi-walled carbon nanotubes with 20 mL of thionyl chloride and 1 mL of DMF and perform ultrasonic treatment to fully disperse the carbon nanotubes into the solution, and react for 30 h under mag...

Embodiment 3

[0044] The preparation method of reactive carbon nanotube flame retardant in the present embodiment comprises the following steps:

[0045] (1) Preparation of polysiloxane

[0046] Measure 30mL of ethanol and 10mL of deionized water, add 0.5g of aminopropyltrimethoxysilane, 0.2g of vinylmethyldimethoxysilane, and 1g of phenyltrimethoxysilane, and stir well; Add tetrabutylammonium hydroxide, control the pH value of the reaction solution to 10, and stir the reaction at room temperature for 6 hours; after the reaction is completed, collect the product through a rotary evaporator, and finally dry it in vacuum at room temperature to obtain polysilicon containing amino groups, vinyl groups, and phenyl groups. Oxygen;

[0047] (2) Preparation of reactive carbon nanotube flame retardant

[0048] Mix 200 mg of carboxylated multi-walled carbon nanotubes with 20 mL of thionyl chloride and 1 mL of DMF and perform ultrasonic treatment to fully disperse the carbon nanotubes into the solut...

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Abstract

The invention relates to a preparation method of a reactive carbon nanotube flame retardant. Since both the polysiloxane and carbon nanotube belong to flame retardants, after the polysiloxane is grafted onto the carbon nanotube through chemical bonds, a synergistic action is generated between the polysiloxane and carbon nanotube, thereby fully displaying the flame retardancy of the polysiloxane and carbon nanotube. The polysiloxane-grafted carbon nanotube structure has vinyl carried by the polysiloxane, the reactive flame retardant can be grafted to unsaturated polyester, silicone rubber and many other synthetic materials through the vinyl, and the phenyl in the polysiloxane can enhance the carbonization property and flame retardancy of the polymer in the combustion process, thereby enhancing the flame retardancy of the matrix and being beneficial to improving the mechanical, electric and other properties of the material. Both the polysiloxane and carbon nanotube belong to carbonization flame retardants, and the benzene ring in the polysiloxane structure can further enhance the carbonization effect in the combustion process, so that the whole reactive flame-retardant system has higher flame retardancy.

Description

technical field [0001] The invention relates to a preparation method of a reactive carbon nanotube flame retardant. Background technique [0002] In recent years, carbon nanotubes have been used as flame retardants for synthetic materials due to their excellent heat resistance and mechanical properties. Due to the strong electrostatic interaction, carbon tubes are easily aggregated into bundles in the polymer matrix, resulting in poor dispersion and poor flame retardancy. A commonly used solution in the prior art is to graft organic substances onto the surface of carbon nanotubes, thereby improving their dispersion in polymers. The composite material that adopts this method to make stability is higher, such as Chen et al. :943-951.] Graft POSS onto the surface of carbon nanotubes, and then prepare polylactic acid / carbon nanotube composites. Due to the strong interfacial bonding force between carbon nanotubes and the matrix, it can be processed under various processing cond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/38C08G77/26C08L83/08C08L67/06C08L83/04
Inventor 王江波黄梦娇胡钺方佳琳
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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