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
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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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