A kind of preparation method of highly dispersed modified lignin and application thereof
A lignin, high-dispersion technology, applied in the field of organic chemical industry, can solve the problems of limited application fields, difficult dispersion, poor compatibility of non-polar rubber, etc., to achieve improved dispersion effect, small surface polarity and good compatibility Effect
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Embodiment 1
[0024] (1) First take 100 parts of papermaking pulping black liquor, add it into the reactor, stir and heat up to 85°C, add 30 parts of alkoxyl donor, stir and react for 1.5h, wherein the weight ratio of alkoxyl donor is formaldehyde :PEG400=10:5;
[0025] (2) Add 5 parts of stearic acid to the reaction system of step (1), raise the temperature to 100°C, stir and react for 1.5h, and use a condensing reflux device for cooling and reflux during this process;
[0026] (3) The liquid product after the reaction enters the spray dryer with an appropriate flow rate, and sprays and dries. The inlet temperature of the spray tower is 150° C., and the outlet temperature is 100° C. to obtain a powdery material;
[0027] (4) Put the dried powdery material into a high-speed mixer, and stir for 2 hours at 105°C and 1300rpm;
[0028] (5) Cool down to 40° C., stop stirring, and discharge, and the obtained powder is the modified lignin.
[0029] (6) Take 70 parts of modified lignin, weigh 100...
Embodiment 2
[0031] (1) First take 100 parts of papermaking pulping black liquor, add it into the reactor, stir and heat up to 90°C, add 15 parts of alkoxyl donor, stir and react for 1.5h, wherein the weight ratio of alkoxyl donor is formaldehyde :PEG400=10:2;
[0032] (2) Add 10 parts of arachidic acid to the reaction system in step (1), raise the temperature to 105°C, stir and react for 1.0h, and use a condensing reflux device for cooling and reflux during this process;
[0033] (3) The liquid product after the reaction enters the spray dryer with an appropriate flow rate, and sprays and dries. The inlet temperature of the spray tower is 160° C., and the outlet temperature is 110° C. to obtain a powdery material;
[0034] (4) Put the dried powdery material into a high-speed mixer, and stir for 1 hour at 100°C and 1000rpm;
[0035] (5) Cool down to 40° C., stop stirring, and discharge, and the obtained powder is the modified lignin.
[0036] (6) Take 60 parts of modified lignin, weigh 1...
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