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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

Active Publication Date: 2011-01-12
WUHAN GREEN BOAT ENVIRONMENT PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In order to solve the defects of long preparation time, complex process and poor modification effect in the prior art of bio-enzyme modified starch, the purpose of the present invention is to provide a composite bio-enzyme modified starch and its preparation method and use

Method used

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  • Modified starch catalyzed by compound bio-enzymes and preparation method and application thereof
  • Modified starch catalyzed by compound bio-enzymes and preparation method and application thereof
  • Modified starch catalyzed by compound bio-enzymes and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 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, spray Add 3kg of water, react for 30 minutes under the action of mechanical and physical shear force under normal pressure at 60°C, 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°C and knead for 8 minutes to inactivate the enzyme and graft, add 1kg of 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 medium, stand still and detect, and the measured viscosity value is below 10mpa.s (NDJ-79 type detector is measured at 95°C, 6% solid content), and the bio-enzyme modified starch (SSU-1) is obtained.

Embodiment 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, spray Add 3kg of water, react for 40 minutes under the action of mechanical and physical shear force under normal pressure at 60°C, 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°C and knead for 8 minutes to inactivate the enzyme and graft, add 1kg of 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 medium, stand still and detect, and the measured viscosity value is below 5mpa.s (NDJ-79 type detector is measured at 95°C, 6% solid content), and the bio-enzyme modified starch (SSU-2) is obtained.

Embodiment 3

[0049] Take 150kg of potato starch, add 0.40kg of sebacic acid, 0.60kg of myristic acid, 0.50kg of lauric acid, 1.5kg of α-amylase, 1.2kg of acid protease, 1kg of lipase, pour it into the starch modification pot, and start the starch modification Pot device, spray 1kg of water, react for 30 minutes under the action of mechanical shear force at 60°C under normal pressure, add 2.50kg of butyl stearate, 5kg of water-soluble polyester, 1kg of chitin, and 0.2kg of gum arabic Heat up to 150°C and stir for 10 minutes to inactivate the enzyme and graft, add 1.25kg of sodium hydroxide (food grade) to adjust the pH value to 6-8, stop heating and stirring, close the device, and discharge the reacted mixture into the material cooler Cool in medium, stand still and detect, the measured viscosity value is below 8mpa.s (NDJ-79 type detector is measured at 95 ℃, 6% solid content rate).

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Abstract

The invention provides a preparation method and application of modified starch catalyzed by compound bio-enzymes. The modified starch is a non-toxic environment-friendly new material prepared by modifying raw plant starch by starch modifying assistants and compound bio-enzyme catalysts through special processes. The invention adopts the following technical scheme: the compound bio-enzyme catalysts are adopted to improve the reaction rate, shorten the reaction time and simplify the production process; and molecular recombination, namely grafting, is simultaneously carried out when the required viscosity is achieved, thus improving the use performance of the starch, reducing the use quantity of the assistants and reducing COD emission. The modified starch is widely applied to such fields as disposable environment-friendly tableware, wrappers, non-woven fabrics, pulp for paper-making, industrial and agricultural membranes, fabrics warp sizing, especially to fabrics warp sizing, and can replace PVA and other size.

Description

technical field [0001] The invention relates to a method for preparing modified starch and its application, in particular to a method for preparing modified starch catalyzed by composite biological enzymes and its application. Background technique [0002] Starch is rich in resources and cheap in price, but natural starch cannot meet the technological requirements of many aspects due to the limitation of its inherent properties. The modified starch not only expands the use space, but also improves the economic value. [0003] Modified starch is the use of physical, chemical or enzymatic means to change the properties of natural starch, through molecular cutting, rearrangement, oxidation or the introduction of substituents in the molecule to change, strengthen or have new properties of starch derivatives. things. Modified starch is widely used in environmental protection new materials, disposable environmental protection tableware, packaging materials, food, pharmaceuticals,...

Claims

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Application Information

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IPC IPC(8): C08L3/06C08L5/08C08L5/00C08L67/00C08L5/04C08B31/04C08K5/103D06M15/11D21H17/28
Inventor 祝顺生祝剑
Owner WUHAN GREEN BOAT ENVIRONMENT PROTECTION TECH
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