Preparation method of surface organic modified titanium carbide nanosheet

A titanium carbide and nanosheet technology is applied in the field of preparation of surface organically modified titanium carbide nanosheets. Market application prospects, large specific surface area, uniform size effect

Pending Publication Date: 2018-09-21
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved in the present invention is to overcome the defects of existing two-dimensional titanium carbide such as easy agglomeration, difficulty in obtaining single-layer or few-layer nanosheets, and difficulty in uniform dispersion in polymers, and provide a highly dispersed, large-size, Preparation method of high-quality, surface organically modified titanium carbide

Method used

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  • Preparation method of surface organic modified titanium carbide nanosheet
  • Preparation method of surface organic modified titanium carbide nanosheet
  • Preparation method of surface organic modified titanium carbide nanosheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Take 0.5g of titanium aluminum carbide and 0.5g of lithium fluoride in a plastic beaker, add 10mL of hydrochloric acid with a concentration of 9mol / L, stir and react at 40°C for 48h at a stirring speed of 400rpm, and centrifuge and wash repeatedly after the reaction When the pH is 7, titanium carbide precipitates are obtained after drying.

[0027] 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 2° C. with an ultrasonic power of 200 W, then centrifuge at 4500 rpm to remove the precipitate, and take the supernatant, namely A suspension of titanium carbide nanosheets was obtained.

[0028] 3) Take 25 mL of the titanium carbide nanosheet suspension obtained in step 2), mix it with 1 mL of cetyltrimethylammonium bromide aqueous solution with a mass concentration of 5%, stir and react at 40° C. for 2 h, and the stirring speed is 400 rpm After the reaction, the product obtained af...

Embodiment 2

[0035] 1) Take 0.5g of titanium aluminum carbide 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 30°C for 60h at a stirring speed of 500rpm, and centrifuge and wash repeatedly after the reaction When the pH is 6.5, titanium carbide precipitates are obtained after drying.

[0036] 2) Take 0.2 g of the precipitated titanium carbide obtained in step 1), disperse it in 40 mL of deionized water, ultrasonicate for 30 min at 0° C. with an ultrasonic power of 300 W, then centrifuge at 4000 rpm to remove the precipitate, and take the supernatant, namely A suspension of titanium carbide nanosheets was obtained.

[0037] 3) Take 25 mL of the titanium carbide nanosheet suspension obtained in step 2), mix it with 2 mL of dodecyltriphenylphosphine bromide aqueous solution with a mass concentration of 2%, stir and react at 35° C. for 3 h, and the stirring speed is 500 rpm After the reaction, the product obtai...

Embodiment 3

[0039]1) Take 0.5g of titanium aluminum carbide and 0.5g of lithium fluoride in a plastic beaker, add 15mL of hydrochloric acid with a concentration of 8mol / L, stir and react at 50°C for 36h at a stirring speed of 600rpm, and centrifuge and wash repeatedly after the reaction When the pH is 6, titanium carbide precipitates are obtained after drying.

[0040] 2) Take 0.2 g of the precipitated titanium carbide obtained in step 1), disperse it in 60 mL of deionized water, ultrasonicate at 5°C for 50 min, and the ultrasonic power is 100 W, then centrifuge at 5000 rpm to remove the precipitate, and take the supernatant, namely A suspension of titanium carbide nanosheets was obtained.

[0041] 3) Take 25mL of the titanium carbide nanosheet suspension obtained in step 2), mix it with 2.5mL of dodecyltrimethylammonium chloride aqueous solution with a mass concentration of 3%, stir and react at 30°C for 4h, and the stirring speed is 600rpm, after the reaction, the product obtained afte...

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Abstract

The invention relates to a preparation method of a surface organic modified titanium carbide nanosheet, belonging to the technical field of preparation of nano materials. The preparation method comprises the following steps: etching an aluminum atom layer in titanium aluminum carbide by virtue of a mixed solution of lithium fluoride and hydrochloric acid so as to prepare titanium carbide precipitates, re-dispersing the titanium carbide precipitates into water, carrying out ultrasonic treatment and centrifugation so as to remove precipitates, and extracting supernatant liquid, so as to obtain titanium carbide nanosheet suspension liquid; and finally adding a surfactant water solution to react, so as to obtain the surface organic modified titanium carbide nanosheet. Compared with a method for etching titanium aluminum carbide by virtue of hydrofluoric acid, the method for preparing titanium carbide by etching the aluminum atom layer in titanium aluminum carbide by virtue of the mixed solution of lithium fluoride and hydrochloric acid has the advantages that the corrosivity is reduced, and the operation safety is improved; and the surface organic modified titanium carbide nanosheet prepared by virtue of the preparation method has relatively high surface activity and heat stability, has good compatibility with high-molecular materials and can be uniformly dispersed into the high-molecular materials, so that the mechanical properties, flame retardance and thermal properties of the high-molecular materials are improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanometer materials, and in particular relates to a method for preparing surface organically modified titanium carbide nanosheets. Background technique [0002] Titanium carbide (Ti 3 C 2 ) is a new type of two-dimensional transition metal carbide. In 2011, Barsoum et al. in the United States first used hydrofluoric acid to form a typical ternary layered carbide Ti 3 AlC 2 obtained by stripping the Al atomic layer. Due to its excellent electrical conductivity and structural stability, titanium carbide has been widely used in catalysis, water treatment, supercapacitors, lithium-ion batteries, and composite materials. After the two-dimensional titanium carbide is synthesized by chemical methods, due to the high surface energy of the nanoparticles, they tend to aggregate thermodynamically, and are easy to agglomerate and precipitate in the solution, which greatly affects its full performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/921B82Y40/00
CPCB82Y40/00C01P2002/88C01P2004/03C01P2004/04C01P2004/20C01B32/921
Inventor 杨伟余彬张洋鲁红典
Owner HEFEI UNIV
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