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Preparation method of aqueous self-dispersing nanometer carbon black

A nano-carbon black and self-dispersing technology, applied in chemical instruments and methods, dyeing polymer organic compound treatment, inorganic pigment treatment, etc., can solve the problems of harsh grafting conditions, incomplete coating, and low initiation efficiency, and achieve The effect of narrow particle size distribution, simple production process and good dispersion performance

Active Publication Date: 2017-05-10
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to harsh grafting conditions, high initiation temperature and low initiation efficiency in this method, the coating is incomplete and the particle size is relatively large (mostly at the micron level).
In addition, most of these modification processes are carried out in some toxic and harmful solvents, which have certain harmful effects on the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 0.6 g of carbon black was treated with 60 g of nitric acid solution (concentration: 30%) at 20° C. for 0.5 h to obtain oxidatively modified carbon black. Weigh 0.1g of silane coupling agent A171 and dissolve it in 100g of ethanol solution, add 1g of oxidatively modified carbon black, disperse the carbon black into nanoparticles through an ultrasonic cell pulverizer, then add 10g of deionized water, and adjust the temperature of the system with ammonia water When the pH value reaches 8.5, transfer the reaction system to the reaction kettle, react at 20°C for 0.5h, add 5g of polymerizable dispersant AHPS, raise the temperature to 60°C, and start adding 0.5% of the initiator ammonium persulfate to the monomer weight dropwise, After reacting for 0.5h, centrifuging at high speed, washing, and drying, the dried carbon black powder is ground and pulverized by a pulverizer, and filtered with a 200-mesh filter to obtain a water-based self-dispersing nano-carbon black pigment.

Embodiment 2

[0022] 4 g of carbon black were treated with 40 g of hydrogen peroxide solution (concentration: 30%) at 60° C. for 2 h to obtain oxidatively modified carbon black. Weigh 5g of silane coupling agent KH570 and dissolve it in 60g of ethanol solution, add 5g of oxidatively modified carbon black, disperse the carbon black into nanoparticles through an ultrasonic cell pulverizer, then add 30g of deionized water, and adjust the pH of the system with acetic acid value to 3.5, transfer the reaction system to the reactor, react at 40°C for 24h, add 10g of sodium p-styrene sulfonate, raise the temperature to 75°C, and start adding 5% of the initiator ammonium persulfate to the monomer weight dropwise, After reacting for 6 hours, centrifuging at high speed, washing, and drying, the dried carbon black powder is ground and pulverized by a pulverizer, and filtered with a 200-mesh filter to obtain a water-based self-dispersing nano-carbon black pigment.

Embodiment 3

[0024] 4g of carbon black was treated with 40g of perchloric acid solution at 50°C for 2h to obtain oxidatively modified carbon black. Weigh 2.5g of silane coupling agent A151 and dissolve it in 50g of ethanol solution, add 5g of oxidatively modified carbon black, disperse the carbon black into nanoparticles through an ultrasonic cell pulverizer, then add 25g of deionized water, and adjust the temperature of the system with ammonia water When the pH value reaches 8.5, transfer the reaction system to the reactor, react at 40°C for 24h, add 5g of polymerizable dispersant ANPS, raise the temperature to 75°C, and start to drop 5% of the initiator ammonium persulfate to the weight of the monomer, and react After 6 hours, after high-speed centrifugation, washing, and drying, the dried carbon black powder is ground and pulverized with a pulverizer, and filtered with a 200-mesh filter to obtain a water-based self-dispersing nano-carbon black pigment.

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PUM

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Abstract

The invention discloses a preparation method of aqueous self-dispersing nanometer carbon black, and belongs to the field of fine chemical engineering. Silane coupling agents containing carbon-carbon double bonds are grafted on the surface of carbon black; polymerizable groups of the silane coupling agents are used for being copolymerized with other aqueous monomers; a layer of polymers with duplex effects of dispersion and stabilization coats the surface of the carbon black particles, so that the goal of self dispersion in an aqueous solvent is achieved.

Description

technical field [0001] The invention relates to a preparation method of water-based self-dispersing nano carbon black, which belongs to the field of fine chemical industry. Background technique [0002] With the increasing awareness of environmental protection in countries around the world, water-based coatings and inks, which save energy and protect the environment, are becoming more and more popular. Carbon black has excellent colorability, weather resistance and chemical stability, and is rich in sources and low in price. It is one of the important colorants. However, due to the characteristics of small particle size, large specific surface area and easy agglomeration of carbon black particles, it is difficult to stabilize Dispersed in the water-based system, these defects limit the full performance of carbon black, which has become a major problem in the application of carbon black. Therefore, enhancing the hydrophilicity of carbon black and improving the dispersion sta...

Claims

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Application Information

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IPC IPC(8): C09C1/56C09C3/06C09C3/12C09C3/04C09C3/10
CPCC09C1/565C09C3/006C09C3/041C09C3/06C09C3/10C09C3/12
Inventor 付少海张丽平李敏王良安田安丽
Owner JIANGNAN UNIV
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