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Preparation method of ferric oxide-doped mesoporous molecular sieve smoke suppressant

A technology of mesoporous molecular sieve and iron oxide, which is applied in the direction of fire-resistant coatings, etc., can solve the problems of not many applications in the field of flame-retardant, and achieve the effect of high specific surface area and stable protection

Inactive Publication Date: 2012-09-12
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, mesoporous molecular sieves have been available for more than 20 years. Although they have been applied in many fields, their applications in the field of flame retardancy are not many

Method used

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  • Preparation method of ferric oxide-doped mesoporous molecular sieve smoke suppressant
  • Preparation method of ferric oxide-doped mesoporous molecular sieve smoke suppressant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 17.04g P123 and 14.4g NaCl, add 435ml deionized water and 15mL 37wt% HCI solution, and stir thoroughly at 35°C for 3h. Then slowly add 26.56g of ethyl orthosilicate and 6.06g of vinyltriethoxysilane, and continue to stir for 12h. The above solution is transferred to a stainless steel hydrothermal kettle lined with polytetrafluoroethylene, sealed, 110 o C for 36h, naturally cooled, filtered, and vacuum-dried, the resulting solid powder was heated to 550°C at a rate of 1.0°C / min in a muffle furnace. o C, sintering for 7 hours to remove the P123 template, and obtain a mesoporous molecular sieve with Ia3d mesoporous structure. Weigh 0.845g of ferric chloride hexahydrate, dissolve in 20mL of ethanol and water mixed solution of equal volume ratio, add 2.0g of the above 150 o C The mesoporous molecular sieve after vacuum drying treatment, ultrasonic dispersion 30min, 40 o C is stirred, concentrated and evaporated to remove the solvent, then placed in a reaction furnac...

Embodiment 2

[0024] Weigh 17.04g P123 and 14.4g NaCl, add 435ml deionized water and 15mL 37wt% HCI solution, and stir thoroughly at 35°C for 3h. Then slowly add 26.56g of ethyl orthosilicate and 6.06g of vinyltriethoxysilane, and continue to stir for 24h. The above solution is transferred to a stainless steel hydrothermal kettle lined with polytetrafluoroethylene, sealed, 110 o C for 24 hours, naturally cooled, filtered, and vacuum-dried, the resulting solid powder was heated to 550 °C at a rate of 1.0 °C / min in a muffle furnace. o C, sintering for 7 hours to remove the P123 template, and obtain a mesoporous molecular sieve with Ia3d mesoporous structure. Weigh 0.34g of ferric chloride hexahydrate, dissolve in 20mL of ethanol and water mixed solution of equal volume ratio, add 2.0g of the above 150 o C The mesoporous molecular sieve after vacuum drying treatment, ultrasonic dispersion 30min, 40 o C was stirred, concentrated and evaporated to remove the solvent, then placed in the reacti...

Embodiment 3

[0026] Weigh 11.25g of P123, add 396g of deionized water and 10.8g of NaCl, stir and dissolve at 35°C. Then add 54ml of HCl solution with a concentration of 37wt%, and continue to disperse for 3h, then slowly add 23.4g of ethyl orthosilicate and 6mL of n-butanol, and continue stirring for 24h. The above solution was placed in a stainless steel hydrothermal kettle lined with polytetrafluoroethylene, sealed, and hydrothermally treated at 110°C for 24h. Cool down naturally, filter, and vacuum-dry, and raise the temperature of the obtained solid powder to 550 °C at a rate of 1.0 °C / min in a muffle furnace. o C, sintering for 7 hours to remove the P123 template, and a mesoporous molecular sieve with a P6mm mesoporous structure can be obtained. Weigh 1.01g of ferric nitrate hexahydrate, dissolve in 20mL of ethanol and water mixed solution of equal volume ratio, add 2.0g of the above 150 o C The mesoporous molecular sieve after vacuum drying treatment, ultrasonic dispersion 30min, ...

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Abstract

The invention discloses a preparation method of a ferric oxide-doped mesoporous molecular sieve smoke suppressant. The method comprises the following steps of: introducing an iron precursor through ultrasonic dispersion and evaporative concentration by taking a mesoporous molecular sieve as a carrier; and performing high-temperature calcination to obtain the ferric oxide-doped mesoporous molecular sieve smoke suppressant. The smoke suppressant belongs to a nanocomposite material, and the mesoporous molecular sieve has a very large specific surface area and has high adsorption volume and selective adsorption effect on smoke toxic gases released in a flame retarding process; a doped active ingredient (ferric oxide) is dispersed into a mesoporous pore canal, is of nanoscale, and has a catalytic oxidation effect on smoke toxic gases; and the mesoporous molecular sieve can be used for keeping the stability of a framework in a high-temperature combustion process and keeping a carbon layer stable, and has high cooperative and synergistic flame retardance.

Description

technical field [0001] The invention belongs to the field of catalytic smoke suppression and detoxification, in particular to a preparation method of iron oxide doped mesoporous molecular sieve smoke suppressant. Background technique [0002] "Water and fire are ruthless." Fire is a common catastrophic problem faced by the whole world, which has caused huge loss of life and property to human society. my country is in the stage of social transformation, with rapid economic growth, expanding urbanization scale, increasing high-rise buildings, and improving interior decoration grades, all of which are facing high risks of frequent fires. The fire situation is grim. [0003] Flame retardant treatment is one of the most effective ways to prevent fire. However, flame retardant treatment will cause flame retardant materials to release more smoke and poisonous gas in a fire. The decomposition of the fuel itself can also release toxic substances. According to the "World Fire Sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K21/02
Inventor 夏燎原胡云楚袁利萍
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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