Method for preparing water-dispersive carbon black adopting surface graft modification method
A technology of surface graft modification and modification of carbon black, which is applied in the treatment of dyed polymer organic compounds, fibrous fillers, etc., can solve the problems of cumbersome steps, many steps, harsh conditions, etc., and achieve the effect of simple preparation process
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Embodiment 1
[0038] 1) 4.1mL of N,N-dimethylacrylamide (40mmol), 20ml of toluene, 98.5mg of azobisisobutyronitrile (0.48mmol) and 81.2mg of TEMPO (0.48mmol) were added to a 50ml three-necked flask, and the reaction After deoxygenation, the system was heated in an oil bath under argon protection and stirring, and the temperature was raised to 90° C. for 16 hours. After the reaction is finished, it is cooled with liquid nitrogen, the product is precipitated with n-hexane, and finally vacuum-dried to obtain poly(N,N-dimethylacrylamide) with TEMPO end groups.
[0039] 2) Add 50 mg of carbon black, 5 ml of N, N-dimethylformamide and 0.2019 g of prepared poly(N, N-dimethylacrylamide) with TEMPO end groups into a 25 ml two-necked bottle, in the reaction system After deoxygenation, under the protection of argon and stirring, the mixture was heated in an oil bath, and the temperature was raised to 130° C. for 12 hours to react. After the reaction, the resulting product was washed with water under ...
Embodiment 2
[0041] 1) with embodiment 1
[0042] 2) Add 50 mg of carbon black, 5 ml of N, N-dimethylformamide and 0.2020 g of poly(N, N-dimethylacrylamide) with TEMPO end groups into a 25 ml two-necked bottle, and in the reaction system After deoxygenation, under the protection of argon and stirring, the mixture was heated in an oil bath, and the temperature was raised to 130° C. for 24 hours to react. After the reaction, the resulting product was washed with water under ultrasonic waves, and then centrifuged; this ultrasonic washing-centrifugal separation process was repeated 6 times, and the finally obtained precipitate was dried to obtain poly(N,N-dimethyl Acrylamide) modified carbon black.
Embodiment 3
[0044] 1) with embodiment 1
[0045] 2) Add 50 mg of carbon black, 5 ml of N, N-dimethylformamide and 0.7509 g of poly(N, N-dimethylacrylamide) with TEMPO end groups into a 25 ml two-necked bottle, and in the reaction system After deoxygenation, under the protection of argon and stirring, the mixture was heated in an oil bath, and the temperature was raised to 130° C. for 24 hours to react. After the reaction, the resulting product was washed with water under ultrasonic waves, and then centrifuged; this ultrasonic washing-centrifugal separation process was repeated 6 times, and the finally obtained precipitate was dried to obtain poly(N,N-dimethyl Acrylamide) modified carbon black.
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