Modified starch catalyzed by compound bio-enzymes and preparation method and application thereof
A technology for compounding biological enzymes and starch, applied in textiles and papermaking, paper, non-fibrous pulp addition, etc., can solve the problems of complex process, long preparation time, poor modification effect, etc., and achieve process simplification, short reaction time and equipment. effect of operation
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[0044] Example 1
[0045] Take 150kg of corn starch, add 0.65kg of adipic acid, 0.30kg of oleic acid, 0.25kg of stearic acid, 2.5kg of glucoamylase, and 2kg of cellulase, pour it into the starch modification pot, turn on the starch modification pot device, and spray Add 3kg of water, react for 30 minutes under the action of mechanical physical shearing force under normal pressure at 60℃, add 5kg of tributyl citrate, 2.5kg of sorbitol ester, 0.75kg of chitosan, and 0.15kg of guar gum. Then heat up to 150℃ and mix for 8 minutes for enzyme inactivation and grafting, add 1kg sodium hydroxide (food grade) to adjust the pH value to 6-8, stop heating, stir and close the device, and discharge the reacted mixture into the material cooler Cool in the middle, stand for testing, and measure the viscosity value below 10mpa.s (measured with NDJ-79 detector at 95°C and 6% solid content) to obtain biological enzyme modified starch (SSU-1).
Example Embodiment
[0046] Example 2
[0047] Take 150kg of corn starch, add 0.65kg of adipic acid, 0.30kg of oleic acid, 0.25kg of stearic acid, 2.5kg of glucoamylase, and 2kg of cellulase, pour it into the starch modification pot, turn on the starch modification pot device, and spray Add 3kg of water and react for 40 minutes under the action of mechanical physical shearing force under normal pressure at 60℃. Add 5kg of tributyl citrate, 2.5kg of sorbitol ester, 0.75kg of chitosan, and 0.15kg of guar gum. Then heat up to 150℃ and mix for 8 minutes for enzyme inactivation and grafting, add 1kg sodium hydroxide (food grade) to adjust the pH value to 6-8, stop heating, stir and close the device, and discharge the reacted mixture into the material cooler Cool in the middle, stand for testing, and measure the viscosity value below 5mpa.s (measured with NDJ-79 detector at 95°C and 6% solid content) to obtain biological enzyme modified starch (SSU-2).
Example Embodiment
[0048] Example 3
[0049] Take 150 kg of potato starch, add 0.40 kg of sebacic acid, 0.60 kg of myristic acid, 0.50 kg of lauric acid, 1.5 kg of α-amylase, 1.2 kg of acid protease, and 1 kg of lipase, pour it into the starch modification pot, and turn on the starch modification Pot device, spray 1kg of water, and react for 30 minutes by mechanical shearing force under normal pressure at 60℃. Add 2.50kg of butyl stearate, 5kg of water-soluble polyester, 1kg of chitin, and 0.2kg of gum arabic. Warm up to 150℃ and stir for 10 minutes for enzyme inactivation and grafting. Add 1.25kg sodium hydroxide (food grade) to adjust the pH to 6-8, stop heating and stirring, close the device, and discharge the reacted mixture into the material cooler Cool in the middle, stand for testing, and the measured viscosity value is below 8mpa.s (measured by NDJ-79 detector at 95°C and 6% solid content).
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