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Preparation method of mesoporous silica nanometer composite flame retardant

A mesoporous silica and nano-composite technology, which is used in the manufacture of tools, wood processing appliances, impregnated wood, etc., can solve the problems of introducing unfavorable flame retardants into pores and limited loading, and achieve excellent synergistic flame retardant effect, process Safe, good thermal stability effect

Inactive Publication Date: 2012-11-07
GUANGDONG YIHUA TIMBER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pore size and pore volume of the diatomaceous earth carrier are small, which is not conducive to the introduction of flame retardants into the pores, and the loading capacity is limited.

Method used

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  • Preparation method of mesoporous silica nanometer composite flame retardant
  • Preparation method of mesoporous silica nanometer composite flame retardant
  • Preparation method of mesoporous silica nanometer composite flame retardant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Dissolve 16.8 g of dodecyltrimethylammonium bromide in a mixed solution of 1.26L of methanol and 3.0L of water, add 30ml of 1M NaOH solution, and stir well. Then, gradually add 24.8g tetraethyl orthosilicate, react at room temperature for 8 hours, transfer to a polytetrafluoroethylene bottle at 95°C and seal and age for 24 hours, filter to obtain a white powder, and dry it in vacuum to obtain mesoporous silica nanoparticles. Particles: Dissolve 8.2g of ammonium polyphosphate in 80ml of water, then add 10.0g of the above-mentioned mesoporous silica particles, stir at 60°C for several hours, evaporate and remove water, then dry in vacuum at 105°C for 8h, grind and sieve, the obtained product is Mesoporous silica nanocomposite flame retardant.

[0016] Weigh 2.0 g of the mesoporous silica nanocomposite flame retardant prepared in Example 1 and 20 g of dry poplar wood powder, grind them thoroughly in an agate mortar, and conduct a CONE experiment with a Stanton Redcroft con...

Embodiment 2

[0019] Dissolve 10.0 g of cetyltrimethylammonium bromide in 4.8 L of water, add 70 ml of 1M NaOH solution, and stir well. Then, 57.5ml tetraethyl orthosilicate was added dropwise, reacted at 80°C for 2h, transferred to a polytetrafluoroethylene bottle at 100°C and aged for 24h, filtered to obtain a white powder, and dried in vacuum to obtain mesoporous silica Nanoparticles: Weigh 6.2 g of dimethyl methylphosphonate, disperse in 120 ml of absolute ethanol, then add 10.0 g of mesoporous silica prepared by the above process, stir for several hours at 50 ° C, evaporate to remove ethanol. Then vacuum Dry at 105°C for 8 hours, grind and sieve to obtain a mesoporous silica nanocomposite flame retardant.

[0020] Weigh 2.0 g of the mesoporous silica nanocomposite flame retardant prepared in Example 2 and 20 g of dry poplar wood powder, grind them thoroughly in an agate mortar, and conduct a CONE experiment with a Stanton Redcroft cone calorimeter. In order to make the experimental te...

Embodiment 3

[0023] Disperse 20 g of polystyrene microspheres in a mixture of 7.5 L of ethanol and 0.5 L of deionized water, then add 0.38 L of 28% ammonia solution, and ultrasonically disperse for 15 minutes. Add 40ml of a mixture of ethyl orthosilicate and octadecyltrimethoxysilane (molar ratio 4:1) dropwise, stir vigorously, react at room temperature for 8 hours, filter and dry to obtain a white solid powder, and then 500 Calcined at ℃ for 7 hours to obtain mesoporous silica hollow spheres; take 10g of ammonium polyphosphate and dissolve it in 160ml of water, then add 8.0g of the above-mentioned mesoporous silica hollow spheres, stir at 60℃ for several hours, and evaporate to remove water. Then Vacuum drying at 105° C. for 8 hours, grinding and sieving, and the obtained product is a mesoporous silica nanocomposite flame retardant.

[0024] Put the low-density polyethylene (LDPE) into the open mixer, knead at 120-130°C for 15 minutes, add a compound flame retardant with a mass ratio of 1...

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Abstract

The invention relates to a method for preparing a mesoporous silica nanometer composite flame retardant, comprising the following steps of: (1) using a silicon source as a precursor, preparing a silica compound by a sol-gel chemical principle under the action of a structure-directing agent, and removing the structure-directing agent to obtain mesoporous silica; (2) dissolving a certain amount of phosphorus type and phosphorus-nitrogen type fire retardants in water or a volatile solvent to form an uniform solution; and (3) adding a proper amount of the mesoporous silica particles prepared from the step (1), stirring for hours at a certain temperature, removing water or the volatile solvent, carrying out vacuum drying, grinding, and sieving to obtain the mesoporous silica nanometer composite flame retardant. The preparation method provided by the invention has advantages of simple preparation process, mild condition and safe process. The prepared composite flame retardant is nanoparticles, has good dispersibility and excellent synergistic flame retardant and smoke suppression effects, and can be widely applied in flame retardation of a plurality of materials.

Description

technical field [0001] The invention relates to a preparation method of a wood flame retardant, in particular to a preparation method of a mesoporous silica nanocomposite flame retardant. Background technique [0002] Fire is a common catastrophic problem faced by people all over the world, which has caused huge loss of life and property to human society. With the gradual improvement of people's living standards, the consumption of polymer materials and wood materials for construction and interior decoration is increasing year by year. However, polymer materials and wood materials are flammable and combustible materials, which can easily lead to the spread of fire, release a large amount of heat energy during combustion, aggravate the fire hazard, and release a large amount of smoke and poisonous gas, causing poisoning and casualties. Therefore, the flame retardant and smoke suppression treatment of polymer materials and wood materials is related to the needs of life safety...

Claims

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Application Information

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IPC IPC(8): C09K21/04C09K21/12B27K3/52B27K3/32C08L23/06C08K9/12C08K3/32
Inventor 夏燎原黄琼涛胡云楚孙宏南吴义强陶涛
Owner GUANGDONG YIHUA TIMBER IND
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