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A kind of titanium carbide nano powder used for abs flame retardant, smoke suppression and detoxification and preparation method thereof

A nano-powder and titanium carbide technology, which is applied in the field of nano-material preparation, can solve the problems of unreported smoke particles and toxic gases, high surface energy of nanoparticles, poor compatibility, etc., and reduce heat release rate and specific surface area. Large, compatible effect

Active Publication Date: 2022-05-10
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, two-dimensional titanium carbide has been reported for polymer flame retardancy, mainly based on its sheet barrier effect and catalytic effect, but the effect on smoke particles and toxic gases during polymer combustion has not been reported yet.
In addition, after two-dimensional titanium carbide is chemically synthesized, due to the high surface energy of nanoparticles, they tend to aggregate thermodynamically and are difficult to disperse in the polymer matrix.
At the same time, the surface of titanium carbide etched by hydrofluoric acid contains functional groups such as hydroxyl and oxygen, which has strong hydrophilicity and poor compatibility with hydrophobic polymers, which affects its full performance.

Method used

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  • A kind of titanium carbide nano powder used for abs flame retardant, smoke suppression and detoxification and preparation method thereof
  • A kind of titanium carbide nano powder used for abs flame retardant, smoke suppression and detoxification and preparation method thereof
  • A kind of titanium carbide nano powder used for abs flame retardant, smoke suppression and detoxification and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1) Take 0.5g of carbon aluminum titanium and 0.5g of lithium fluoride in a plastic beaker, add 10mL of hydrochloric acid with a concentration of 10mol / L, stir and react at 40°C for 48h at a stirring speed of 400rpm, after the reaction is completed, centrifuge repeatedly, After washing to pH 7, titanium carbide was precipitated after drying.

[0042] 2) Take 0.2 g of the precipitated titanium carbide obtained in step 1), disperse it in 50 mL of deionized water, ultrasonicate at 0°C for 30 min, and the ultrasonic power is 300 W, then centrifuge at 5000 rpm to remove the precipitate, and take the supernatant, namely A suspension of titanium carbide nanosheets was obtained.

[0043] 3) Dissolve 2.9g of 2,4-dimethylpyrrole and 1.8g of p-nitrobenzaldehyde in 200mL of tetrahydrofuran, protect it with nitrogen, add 1mL of trifluoroacetic acid, react at 25°C for 12h, then add 2.8g of 2 , 3-dichloro-5,6-dicyano-p-benzoquinone, continue to react at 25°C for 4h, add 70mL triethyla...

Embodiment 2

[0054] 1) Take 0.5g of carbon aluminum titanium and 0.5g of lithium fluoride in a plastic beaker, add 12mL of hydrochloric acid with a concentration of 8mol / L, stir and react at 45°C for 40h at a stirring speed of 450rpm, and centrifuge repeatedly after the reaction. After washing to pH 7, titanium carbide was precipitated after drying.

[0055] 2) Take 0.2 g of the precipitated titanium carbide obtained in step 1), disperse it in 50 mL of deionized water, ultrasonicate for 40 min at 1 ° C, and the ultrasonic power is 250 W, then centrifuge at 4500 rpm to remove the precipitate, and take the supernatant, namely A suspension of titanium carbide nanosheets was obtained.

[0056] 3) Dissolve 2.9g of 2,4-dimethylpyrrole and 1.8g of p-nitrobenzaldehyde in 190mL of tetrahydrofuran, pass through nitrogen protection, add 2mL of trifluoroacetic acid, react at 28°C for 16h, then add 2.8g of 2 , 3-dichloro-5,6-dicyano-p-benzoquinone, continue to react at 28°C for 5h, add 75mL triethylam...

Embodiment 3

[0060] 1) Take 0.5g of carbon aluminum titanium and 0.5g of lithium fluoride in a plastic beaker, add 15mL of hydrochloric acid with a concentration of 7mol / L, stir and react at 50°C for 60h, and the stirring speed is 600rpm. After washing to pH 7, titanium carbide was precipitated after drying.

[0061] 2) Take 0.2 g of the precipitated titanium carbide obtained in step 1), disperse it in 50 mL of deionized water, ultrasonicate at 2°C for 50 min with an ultrasonic power of 150 W, then centrifuge at 4000 rpm to remove the precipitate, and take the supernatant, namely A suspension of titanium carbide nanosheets was obtained.

[0062] 3) Dissolve 2.9g of 2,4-dimethylpyrrole and 1.8g of p-nitrobenzaldehyde in 180mL of tetrahydrofuran, protect it with nitrogen, add 3mL of trifluoroacetic acid, react at 30°C for 18h, and then add 2.8g of 2 , 3-dichloro-5,6-dicyano-p-benzoquinone, continue to react at 30°C for 6h, add 80mL triethylamine and 85mL boron trifluoride ether at 2°C, reac...

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Abstract

The invention relates to a titanium carbide nano-powder used for flame retardancy, smoke suppression and toxicity reduction of ABS and a preparation method thereof, belonging to the technical field of preparation of nanomaterials. It is composed of fluorine boron and two-dimensional titanium carbide through the interface charge attraction. It has a sheet structure, the thickness of the sheet is 5-20nm, and the diameter of the face is 0.5-2μm. Compared with covalent bonding, the titanium carbide nanopowder used for flame retardancy, smoke suppression and toxicity reduction of ABS of the present invention will not destroy the surface structure of titanium carbide, and can maintain the original shape and structure of titanium carbide nanosheets. Good hydrophobicity, good compatibility with ABS, can be evenly dispersed in ABS resin. It can improve the oxygen index of ABS, reduce the heat release rate and smoke generation rate during combustion, and inhibit HCN and NO x , NH 3 , CO and other toxic gas release. It can also improve the tensile strength of ABS and maintain its elongation at break under low addition amount, reflecting better mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanometer materials, and in particular relates to a titanium carbide nanopowder used for flame retardancy, smoke suppression and toxicity reduction of ABS and a preparation method thereof. Background technique [0002] Acrylonitrile-butadiene-styrene copolymer (abbreviated as ABS) is a thermoplastic polymer material with high strength, good toughness and easy processing. It is widely used in machinery, electrical, textile, automobile and shipbuilding industries. . However, ABS is highly flammable, and a large amount of black smoke and toxic gases (such as HCN, NO x , CO, etc.), which can easily cause personnel poisoning and suffocation. At present, halogenated compounds and phosphorus nitrogen compounds are commonly used flame retardants for ABS. Adding 10-30% by weight of flame retardant can effectively inhibit the combustion of ABS, but the inhibitory effect on smoke particles and toxi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/04C08K3/14C08L55/02
CPCC08K9/04C08K3/14C08K2201/011C08L2201/02C08K2201/003C08L55/02
Inventor 杨伟朱三娥王奋斗高田玉鲁红典
Owner HEFEI UNIV
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