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Ionic liquid grafted modified carbon black and preparation method thereof

A technology of ionic liquid and graft modification, which is applied in the treatment of dyed low-molecular organic compounds and fibrous fillers. The effect of simple process

Inactive Publication Date: 2013-07-24
SUZHOU 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 by the present invention is to overcome the shortcomings of existing carbon blacks such as easy agglomeration and poor dispersibility, and provide a kind of ionic liquid grafted modified carbon black with good dispersibility

Method used

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  • Ionic liquid grafted modified carbon black and preparation method thereof
  • Ionic liquid grafted modified carbon black and preparation method thereof
  • Ionic liquid grafted modified carbon black and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A kind of ionic liquid graft modification carbon black, it is prepared by following steps:

[0033] (1) Preparation of acidified carbon black: In the reaction vessel, add 100ml of a mixture of concentrated nitric acid with a mass fraction of 60% and concentrated sulfuric acid with a mass fraction of 80% (the volume ratio of the two is 1:1), 1g of carbon black, and ultrasonically After making it uniformly dispersed, stir and heat at 90°C for 8 hours, then dilute the mixed solution with deionized water, and obtain a black powder after centrifugation; then add deionized water, ultrasonically disperse, and centrifuge, repeat 5 times, and the product drying to obtain acidified carbon black;

[0034] (2) Preparation of ionic liquid grafted modified carbon black: take 0.3 g of acidified carbon black obtained in step (1), hydroxyalkyl ionic liquid Disperse 0.9g, 0.3g of 4-dimethylaminopyridine, and 0.36g of dicyclohexylcarbodiimide in N,N-dimethylformamide, stir and heat at 8...

Embodiment 2

[0036] A kind of ionic liquid graft modification carbon black, it is prepared by following steps:

[0037] (1) Preparation of acidified carbon black: In the reaction vessel, add 100ml of a mixture of concentrated nitric acid with a mass fraction of 75% and concentrated sulfuric acid with a mass fraction of 98% (the volume ratio of the two is 1:4), 1g of carbon black, and ultrasonically After making it uniformly dispersed, stir and heat at 50°C for 12 hours, then dilute the mixed solution with deionized water, and obtain a black powder after centrifugation; then add deionized water, ultrasonically disperse, and centrifuge, repeat 3 times, and the product drying to obtain acidified carbon black;

[0038] (2) Preparation of ionic liquid grafted modified carbon black: take 0.3 g of acidified carbon black obtained in step (1), hydroxyalkyl ionic liquid Disperse 2.7g, 1.5g of 4-dimethylaminopyridine, and 1.8g of dicyclohexylcarbodiimide in N,N-dimethylformamide, stir and heat at 5...

Embodiment 3

[0040] A kind of ionic liquid graft modification carbon black, it is prepared by following steps:

[0041] (1) Preparation of acidified carbon black: In the reaction vessel, add 100ml of a mixture of concentrated nitric acid with a mass fraction of 75% and concentrated sulfuric acid with a mass fraction of 98% (the volume ratio of the two is 1:1), 1g of carbon black, and ultrasonically After making it uniformly dispersed, stir and heat at 60°C for 10 hours, then dilute the mixed solution with deionized water, and obtain a black powder after centrifugation; then add deionized water, ultrasonically disperse, and centrifuge, repeat 5 times, and the product drying to obtain acidified carbon black;

[0042] (2) Preparation of ionic liquid grafted modified carbon black: take 0.3 g of acidified carbon black obtained in step (1), hydroxyalkyl ionic liquid 1.2g, 0.45g of 4-dimethylaminopyridine, and 0.6g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide were dispersed in N,N-dimethylf...

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Abstract

The invention relates to an ionic liquid grafted modified carbon black and a preparation method thereof. The ionic liquid grafted modified carbon black is obtained by chemical reaction of acidified carbon black with a carboxyl group on the surface and hydroxyalkyl ionic liquid, wherein the acidified carbon black with the carboxyl group on the surface is formed from carbon black under the action of acid with an oxidizing property. The method comprises the following steps of: firstly enabling the carbon black to react at the temperature of 50-90 DEG C in the presence of the acid with the oxidizing property to obtain the acidified carbon black; and secondly enabling the acidified carbon black and the hydroxyalkyl ionic liquid to react in a solvent in the presence of a catalyst and a dehydrating agent at the temperature of 50-80 DEG C to generate the ionic liquid grafted modified carbon black. The ionic liquid grafted modified carbon black provided by the invention has good dispersion in the solvent and good compatibility with an organic polymer material.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic materials, in particular to an ionic liquid grafted modified carbon black and a preparation method thereof. Background technique [0002] Carbon black (also known as carbon black) is a kind of amorphous carbon, which is light, loose and extremely fine black powder, with a very large specific surface area, ranging from 10-3000m 2 / g, is the product of incomplete combustion or thermal decomposition of organic matter (natural gas, heavy oil, fuel oil, etc.) under the condition of insufficient air. Specific gravity 1.8-2.1 is called "gas black" made of natural gas, "lamp black" made of oil, and "acetylene black" made of acetylene. In addition, there are "trough black" and "furnace black". According to the performance of carbon black, there are "reinforcing carbon black", "conductive carbon black", "wear-resistant carbon black" and so on. It can be used as a black dye, used in the m...

Claims

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Application Information

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IPC IPC(8): C09C1/56C09C3/08
Inventor 严锋钱文静仇波
Owner SUZHOU UNIV
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