Method for dispersion of nanocrystalline cellulose powder in waterborne medium
A technology of nanocrystalline cellulose and aqueous medium, which is applied in the field of dispersing nanocrystalline cellulose powder in aqueous medium, can solve the problems of poor dispersion and agglomeration of nanocrystalline cellulose, achieve narrow particle size distribution, simple method, and easy operation easy effect
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Embodiment 1
[0025] Take a clean and dry 200ml beaker, add 100ml of pure water, place it on a magnetic stirrer, add 1g of nanocrystalline cellulose powder prepared by the acid hydrolysis method into the center of the vortex at a speed of 800r / min in 20 times, and wait until the powder is dispersed to Continue to add until it is invisible to the naked eye until the nanocrystalline cellulose is completely added to the aqueous system; seal the beaker to prevent air from entering, increase the magnetic stirrer speed to 2000r / min, and continue stirring for 3h; The cellulose was placed in an ultrasonic cell breaker for treatment, the temperature was controlled at 20°C, and the specific energy was 12kJ / g; finally, a nanocrystalline cellulose solution with a mass volume ratio of 1% was obtained. Take an appropriate amount of nanocrystalline cellulose solution after ultrasonic treatment and send it to the Malvern laser particle size analyzer. After testing, the average particle size of the dispersed...
Embodiment 2
[0027] Take a clean and dry 200ml beaker, add 100ml of pure water, place it on an overhead stirrer, add 3g of nanocrystalline cellulose powder prepared by acid hydrolysis to the center of the vortex at a speed of 300r / min in 25 times, and wait for the powder to disperse Continue to add until it is invisible to the naked eye until the nanocrystalline cellulose is completely added to the aqueous phase system; seal the beaker to prevent air from entering, increase the speed of the overhead stirrer to 1000r / min, and continue stirring for 4h; The crystalline cellulose was processed in an ultrasonic cell breaker, the temperature was controlled at 15°C, the specific energy was 25kJ / g, and finally a nanocrystalline cellulose solution with a mass volume ratio of 3% was obtained. Take an appropriate amount of nanocrystalline cellulose solution after ultrasonic treatment and send it to the Malvern laser particle size analyzer. After testing, the average particle size of the dispersed nano...
Embodiment 3
[0029] Take a clean and dry 200ml beaker, add 100ml of pure water, place it on a magnetic stirrer, add 5g of nanocrystalline cellulose powder prepared by the acid hydrolysis method into the center of the vortex at a speed of 1500r / min for 30 times, and wait until the powder is dispersed to Then continue to add until the nanocrystalline cellulose is completely added to the water phase system; then place the beaker under the high-speed disperser, adjust the speed to 8000r / min, stir intermittently twice, each time for 2min; then stir evenly The nanocrystalline cellulose was placed in an ultrasonic cell breaker for treatment, the temperature was controlled at 10°C, the specific energy was 40kJ / g, and finally a nanocrystalline cellulose solution with a mass volume ratio of 5% was obtained. Take an appropriate amount of nanocrystalline cellulose solution after ultrasonic treatment and send it to the Malvern laser particle size analyzer. After testing, the average particle size of the...
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Abstract
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