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Preparation method of highly dispersible core-shell type mh@cmss flame retardant

A high-dispersion, core-shell type technology, applied in the field of inorganic flame retardant preparation, can solve the problems of composite material mechanical properties decline, uneven dispersion, etc., and achieve the effect of simple preparation method, high dispersion and high flame retardant efficiency

Active Publication Date: 2018-08-10
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the magnesium hydroxide used has a hexagonal sheet shape and is unevenly dispersed on the surface of carbon microspheres, adding it to the polymer will cause a sharp decline in the mechanical properties of the composite material.

Method used

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  • Preparation method of highly dispersible core-shell type mh@cmss flame retardant
  • Preparation method of highly dispersible core-shell type mh@cmss flame retardant
  • Preparation method of highly dispersible core-shell type mh@cmss flame retardant

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Experimental program
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Effect test

Embodiment 1

[0026] Weigh 41.62g of glucose powder into 600mL of deionized water, stir and dissolve evenly, and prepare a 0.35mol / L glucose solution; add the glucose solution to a 1L autoclave, and heat up to a constant temperature of 280°C at a rotational speed of 150r / min. After 6 hours of reaction, cooled to room temperature, the reaction product was taken out, filtered, washed with absolute ethanol and deionized water until the filtrate was clear, the obtained solid product was dried at 120 °C for 4 hours, and ground to obtain 7.6 g of CMSs black powder.

[0027] Dissolve 4g NaOH powder in a mixed solvent consisting of 50mL absolute ethanol and 50mL deionized water to prepare a 1.0mol / L NaOH solution; weigh 10.15g MgCl 2 ·6H 2 O powder, dissolved in a mixed solvent consisting of 50 mL of absolute ethanol and 50 mL of deionized water, to prepare 0.5 mol / L MgCl 2 solution; take 5.8g of PEG6000 and dissolve it in 100mL of deionized water to obtain a 5.48% PEG6000 aqueous solution.

[00...

Embodiment 2

[0032] Dissolve 3.2g NaOH powder in a mixed solvent consisting of 50mL absolute ethanol and 50mL deionized water to prepare a 0.8mol / L NaOH solution; weigh 8.12g MgCl 2 ·6H 2 O powder, dissolved in a mixed solvent consisting of 50 mL of absolute ethanol and 50 mL of deionized water, to prepare 0.4 mol / L MgCl 2 solution; take 2.9g of PEG6000 and dissolve it in 100mL of deionized water to obtain a 2.8% PEG6000 aqueous solution.

[0033] Weigh 5.8g of CMSs, mix it with the above NaOH solution, heat to 60°C, and add the above MgCl dropwise at a rate of 5mL / min under the stirring speed of 400r / min. 2 In the solution, after reacting for 30 min, 1 mL of 2.8% PEG6000 aqueous solution was added, and the constant temperature reaction was continued for 18 h. After the reaction, cooled to room temperature, filtered, the filter cake was washed with absolute ethanol until the filtrate was clear, then washed with distilled water until neutral, dried at 120 °C for 4 h, and ground to obtain ...

Embodiment 3

[0035] Dissolve 4.8g NaOH powder in a mixed solvent consisting of 33mL absolute ethanol and 67mL deionized water to prepare a 1.2mol / L NaOH solution; weigh 12.18g MgCl 2 ·6H 2 O powder, dissolved in a mixed solvent consisting of 33 mL of absolute ethanol and 67 mL of deionized water, to prepare 0.6 mol / L MgCl 2 solution; take 8.7g of PEG6000 and dissolve it in 100mL of deionized water to obtain an 8% PEG6000 aqueous solution.

[0036] Weigh 2.9g of CMSs, mix it with the above NaOH solution, heat to 40°C, and add the above MgCl dropwise at a rate of 4mL / min under the stirring speed of 800r / min. 2 In the solution, after the reaction for 30min, 1mL of 8% PEG6000 aqueous solution was added, and the constant temperature reaction was continued for 21h. After the reaction, cooled to room temperature, filtered, the filter cake was washed with absolute ethanol until the filtrate was clear, then washed with distilled water until neutral, dried at 120 °C for 4 h, and ground to obtain M...

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Abstract

The invention discloses a preparation method of a high-dispersivity core-shell MH@CMSs (magnesium hydroxide@carbon microspheres) flame retardant. The preparation method comprises the following steps: dispersing CMSs in a sodium hydroxide ethanol water solution, dropwisely adding a magnesium chloride ethanol water solution while stirring to react for 15-30 minutes, adding a dispersing agent polyethyleneglycol 6000 water solution, and carrying out thermostatic reaction at 40-60 DEG C for 18-24 hours to obtain the high-dispersivity core-shell MH@CMSs flame retardant. The high-dispersivity core-shell MH@CMSs flame retardant prepared by the method can eliminate the aggregation among the flame retardant, improves the compatibility with the high-polymer base material, and effectively decelerates the sharp degradation of the mechanical properties of the polymer.

Description

technical field [0001] The invention belongs to the technical field of inorganic flame retardant preparation, and relates to a preparation method of a core-shell type flame retardant with high dispersibility. Background technique [0002] Magnesium Hydroxide (MH) is a green and environmentally friendly additive inorganic flame retardant. It has no emission of harmful substances during production, use and disposal. It has good thermal stability, no volatilization, no toxic gas, and obvious smoke elimination effect. and other advantages, it has been paid more and more attention at home and abroad. [0003] However, magnesium hydroxide is not suitable to be added directly to polymers as a flame retardant. This is because magnesium hydroxide is an inorganic substance, which is directly added to the polymer and has poor compatibility with the polymer. Even if the addition amount is increased, its flame retardant efficiency is also low. At the same time, due to the strong polari...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/12C08K9/10C08K3/22C08K3/04C08K7/18C08L67/02
CPCC08K3/04C08K3/22C08K7/18C08K9/10C08K9/12C08K2003/2224C08L2201/02C08L67/02
Inventor 牛梅薛宝霞李京京杨雅茹白洁戴晋明
Owner TAIYUAN UNIV OF TECH
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