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Preparation method of oily self-dispersing nano carbon black

A nano-carbon black, 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, low initiation efficiency, high initiation temperature, etc., and achieve particle size Narrow distribution, good dispersing performance, environment-friendly effect

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, this method is due to harsh grafting conditions, high initiation temperature, and low initiation efficiency resulting in incomplete coating and large particle size (mostly at the micron level); in addition, these modification processes are mostly carried out in some toxic and harmful solvents. The environment has certain harmful effects

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 0.5g methyl methacrylate, raise the temperature to 60°C, and start to add 0.5% of the initiator azobis Isobutyronitrile, reacted for 0.5h, centrifuged at high speed, washed, dried, ground and pulverized the dried carbon black powder with a pulverizer, and filtered with a 200-mesh filter to obtain oily 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 4g of silane coupling agent KH570 and dissolve it in 60g of ethanol solution, add 8g 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 When the value reaches 3.5, transfer the reaction system to the reactor, react at 40°C for 24h, add 10g of ethyl methacrylate, raise the temperature to 75°C, and start to dropwise add 5% of the initiator azobisisoheptyl to the weight of the monomer Nitrile, reacted for 6 hours, centrifuged at high speed, washed, dried, ground and pulverized the dried carbon black powder with a pulverizer, and filtered with a 200-mesh filter to obtain oily self-dispersing nano-carbon black pigment.

Embodiment 3

[0024] 4 g of carbon black was treated with 40 g of perchloric acid solution at 50° C. for 2 h 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 reaction kettle, react at 40°C for 24h, add 10g of butyl methacrylate, raise the temperature to 75°C, and start to dropwise add 5% of the initiator azobisisobutyl to the weight of the monomer Nitrile, reacted for 10 hours, centrifuged at high speed, washed, dried, ground and pulverized the dried carbon black powder with a pulverizer, and filtered with a 200-mesh filter to obtain oily self-dispersing nano-carbon black pigment.

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Abstract

The invention discloses a preparation method of oily self-dispersing nano carbon black and belongs to the field of fine chemical industry. A silane coupling agent containing carbon-carbon double bonds is grafted on the surface of carbon black, polymerizable groups of the silane coupling agent are utilized to copolymerize with other oily monomers, the surfaces of carbon black particles are coated with a layer of polymer having both dispersing and stabilizing effects, and then the objective of self-dispersing in oily solvents is achieved.

Description

technical field [0001] The invention relates to a preparation method of oily self-dispersing nano carbon black, which belongs to the field of fine chemical industry. Background technique [0002] As an important colorant, carbon black is widely used in many fields such as rubber, plastics, and coatings. However, due to the characteristics of small particle size, large specific surface area, and easy agglomeration of carbon black particles, it is difficult to stably disperse in oily systems. These defects limit It has become a major problem in the application of carbon black to ensure the full performance of carbon black. Therefore, enhancing the lipophilicity of carbon black and improving the dispersion stability of carbon black in oily solvents has become a current research hotspot. [0003] Oily self-dispersing carbon black pigment is a new type of coloring material developed in recent years. It has the characteristics of convenient transportation and simple use, and has ...

Claims

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Application Information

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IPC IPC(8): C09C1/56C09C3/06C09C3/10C09C3/12
CPCC09C1/565C09C3/006C09C3/06C09C3/10C09C3/12
Inventor 付少海张丽平李敏王良安王春霞
Owner JIANGNAN UNIV
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