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A kind of production method of preparing denatured starch slurry by biological enzyme

A modified starch and manufacturing method technology, applied in fiber treatment, textile and papermaking, fermentation, etc., can solve the problems of difficult separation of grafted starch products, expensive initiators, low grafting efficiency of products, etc., and shorten the processing time of sizing , product separation is easy, and the effect of avoiding drastic changes in system viscosity

Active Publication Date: 2016-02-10
袁于斐
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the disadvantages of expensive initiator, low initiation efficiency, low product grafting efficiency and difficult separation of grafted starch products in the preparation process of grafted starch. The branched chain structure in the starch can adjust the structure of the starch macromolecules to form amylose with a relatively low molecular weight

Method used

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  • A kind of production method of preparing denatured starch slurry by biological enzyme
  • A kind of production method of preparing denatured starch slurry by biological enzyme
  • A kind of production method of preparing denatured starch slurry by biological enzyme

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 8.5 g of acrylic acid, add 20% NaOH solution to neutralize the pH of the solution to 5-7, and prepare sodium acrylate solution. The prepared sodium acrylate solution was mixed with 160 g of a solution of 40% acrylic acid as a grafted monomer mixture. Add 500g of ordinary potato starch into deionized water to make starch milk containing 30% starch, put it in an ultrasonic processor at room temperature, raise the temperature to 40°C, turn on the ultrasonic treatment for 20 minutes, adjust the pH value to 4-6 with acetic acid, add deionized 1g of branching enzyme, stirred evenly, incubated at 40°C for 5 hours, then raised the temperature to 80°C for 30 minutes to inactivate the debranching enzyme. Add aqueous sodium bicarbonate solution to the prepared starch milk, adjust the pH value of the reaction system to 8-9, and pass nitrogen gas for 20 minutes to remove dissolved oxygen in the solution. Weigh 25g of acetylacetone and 250mL of HRP with a concentration of 1mg / ...

Embodiment 2

[0033] Weigh 62g of acrylic acid and 13g of butyl acrylate and mix uniformly as graft comonomer. Add 500g of ordinary corn starch into deionized water to make starch milk containing 30% starch, put it into an ultrasonic processor at room temperature, raise the temperature to 40°C, turn on the ultrasonic treatment for 20 minutes, adjust the pH value to 4-6 with acetic acid, add deionized 1g of branching enzyme, stirred evenly, incubated at 40°C for 5 hours, then raised the temperature to 80°C for 30 minutes to inactivate the debranching enzyme. Add aqueous sodium bicarbonate solution to the prepared starch milk, adjust the pH value of the reaction system to 8-9, and pass nitrogen gas for 20 minutes to remove dissolved oxygen in the solution. Weigh 25g of acetylacetone and 250mL of HRP with a concentration of 1mg / L and mix them, add them to the starch milk that has been prepared, and add HRP with a mass concentration of 30% to the system at the same time. 2 o 2 Mix the solutio...

Embodiment 3

[0036] Weigh 18g of acrylic acid and 12g of ethyl acrylate and mix uniformly as graft comonomer. Add 200g of ordinary corn starch into deionized water to make starch milk containing 30% starch, put it in an ultrasonic processor at room temperature, raise the temperature to 40°C, turn on the ultrasonic treatment for 15 minutes, adjust the pH value to 4-6 with acetic acid, add deionized 0.4 g of branched enzyme, stirred evenly, and incubated at 40°C for 3 hours, then raised to 80°C and reacted for 20 minutes to inactivate the debranching enzyme. Add aqueous sodium bicarbonate solution to the prepared starch milk, adjust the pH value of the reaction system to 8-9, and pass nitrogen gas for 15 minutes to remove dissolved oxygen in the solution. Weigh 1g of acetylacetone and 100mL of HRP with a concentration of 1mg / L and mix them, add them to the prepared starch milk, and add HRP with a mass concentration of 30% to the system at the same time. 2 o 2 Mix the solution with the acry...

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Abstract

The invention discloses a method for producing grafted starch size through bio-enzyme. The method adopts ultronic assistant debranching enzyme to pretreat original starch, the macromolecular structure and molecular weight of the starch are adjusted, and the masses of different types of enzymes are stabilized; and a mixed initiating system which consists of horse radish peroxidase, hydrogen peroxide and beta-diketone is utilized to initiate the graft copolymerization of the starch and acrylic acid monomers, and a polyacrylic acid branch is connected to a starch macromolecule. According to the method, the bio-enzyme is adopted to modify the starch, the reaction conditions are moderate, and the activity is controllable; the horse radish peroxidase initiates the polymerization reaction, so that low-temperature branching polymerization can be effectively realized, and the temperature of an initiation process is controlled stably; and the polymerization product has low viscosity and is easy to separate.

Description

technical field [0001] The invention relates to the preparation of modified starch textile size for denim yarn sizing, in particular to a production method for preparing grafted starch size through biological enzymes. Background technique [0002] Most denim fabrics are coarse-count and high-density fabrics with high fabric tightness coefficients. The fabric surface is required to be flat and clear. Weaving on a shuttleless loom. Most denim fabrics are produced by air-jet yarn, whose strength is 10-20% lower than that of ring-spun yarn; and denim fabrics adopt the process route of dyeing first and then sizing. It is compensated by sizing to adapt to the weaving environment, so warp sizing is one of the key processes in denim production. Through sizing, the warp surface is covered with a layer of smooth, wear-resistant, flexible and certain-strength size film, and at the same time, part of the size is penetrated into the inside of the yarn to increase the adhesion between f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P19/16C12P19/04C08F251/00D06M15/263
Inventor 袁于斐
Owner 袁于斐
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