Preparation method for tin-doped mesoporous silica smoke suppressant

A technology of mesoporous silica and smoke suppressant, which is applied in the direction of fireproof coatings, etc., can solve the problem that there is no relevant literature report on the catalytic conversion of smoke and poisonous gas, and achieve the effect of high specific surface area

Inactive Publication Date: 2013-06-12
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, although mesoporous materials are widely used, there is no relevant literature report on the catalyt

Method used

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  • Preparation method for tin-doped mesoporous silica smoke suppressant
  • Preparation method for tin-doped mesoporous silica smoke suppressant
  • Preparation method for tin-doped mesoporous silica smoke suppressant

Examples

Experimental program
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Effect test

Embodiment 1

[0026] At room temperature, dissolve 2g of cetyltrimethylammonium chloride in 960g of deionized water, add 6ml of 2mol / L NaOH solution, and stir evenly. Raise the temperature to 80°C, add 4g of SnCl with a mass percentage of 40% 4 ·5H 2 O aqueous solution, stirred for 15min, then added dropwise 10mL tetraethyl orthosilicate, stirred vigorously, and reacted at 80°C for 2h. The above-mentioned glue solution was transferred to a polytetrafluoroethylene-lined stainless steel hydrothermal kettle and sealed and matured at 105°C for 24 hours. After repeated washing and filtration, a white powder was obtained, and vacuum-dried. Then place it in a tube furnace and calcinate at a heating rate of 3°C / min to 550°C for 6h to obtain a tin-doped mesoporous silica smoke suppressant.

Embodiment 2

[0028] At room temperature, dissolve 1.96g of dodecyltrimethylammonium bromide in 800g of deionized water, add 12ml of 1mol / L NaOH solution, and stir evenly. Heat up to 70°C, add 8g of SnCl with a mass percentage of 40% 4 ·5H 2 The aqueous solution of O was stirred for 15 min, then 8.4 mL of methyl orthosilicate was added dropwise, stirred vigorously, and reacted at 70°C for 2 h. The above-mentioned glue solution was transferred to a polytetrafluoroethylene-lined stainless steel hydrothermal kettle and sealed and matured at 105°C for 24 hours. After repeated washing and filtration, a white powder was obtained, and vacuum-dried. Then place it in a tube furnace and calcinate at a heating rate of 3°C / min to 550°C for 6h to obtain a tin-doped mesoporous silica smoke suppressant.

Embodiment 3

[0030] At room temperature, dissolve 1.68g of tetradecyltrimethylammonium bromide in 748g of deionized water, add 5ml of 3mol / L NaOH solution, and stir evenly. Heat up to 80°C, add 2g of SnCl with a mass percentage of 40% 4 ·5H 2 O aqueous solution, stirred for 15min, then added dropwise 10mL tetraethyl orthosilicate, stirred vigorously, and reacted at 80°C for 2h. The above-mentioned glue solution was transferred to a polytetrafluoroethylene-lined stainless steel hydrothermal kettle and sealed and matured at 105°C for 24 hours. After repeated washing and filtration, a white powder was obtained, and vacuum-dried. Then place it in a tube furnace and calcinate at a heating rate of 3°C / min to 550°C for 6h to obtain a tin-doped mesoporous silica smoke suppressant.

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Abstract

The invention discloses a preparation method for a tin-doped mesoporous silica smoke suppressant, comprising the following steps of: doping an active component, namely, tin, in the framework of mesoporous silica via a hydrothermal isomorphous substitution method, roasting, and then obtaining the tin-doped mesoporous silica smoke suppressant. The smoke suppressant has a high specific surface area, and an adsorption effect on the smoke toxic gas released during a flame-retardant process; simultaneously, the active components, namely, tin atoms, of the smoke suppressant are located in the framework of mesoporous silica, and have a catalytic conversion effect on the smoke toxic gas released during the flame-retardant process; additionally, the tin-doped mesoporous silica is good in heat stability, capable of protecting a carbon layer to be stable, and good in synergistic flame-retardant effect. The tin-doped mesoporous silica smoke suppressant can be widely applied to flame retardance, smoke suppression and toxicity reduction for the materials of wood, high-molecular materials, paper, braided fabrics, and the like in case of being compounded with phosphorus-nitrogen flame retardants.

Description

technical field [0001] The invention relates to smoke suppression, toxicity reduction and synergistic flame retardancy, specifically preparing a tin-doped mesoporous silicon dioxide smoke suppressant by a hydrothermal isomorphic substitution method, which can be combined with a phosphorus-nitrogen flame retardant It is widely used in flame retardancy, smoke suppression and poison attenuation of combustible materials such as wood, polymer materials, paper and woven fabrics. Background technique [0002] Flame retardant and fire prevention are related to the safety of people's lives and properties. Fire is a catastrophic problem facing 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 and increasing social wealth. The expansion of urbanization scale, the increase of high-rise buildings, and the improvement of interior decoration grades all face high risks of expandi...

Claims

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Application Information

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IPC IPC(8): C09K21/02
Inventor 夏燎原胡云楚田梁材王洁陈旬袁利萍吴义强
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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