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Method for producing modified starch size through bio-enzyme

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

Active Publication Date: 2013-04-17
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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  • Method for producing modified starch size through bio-enzyme
  • Method for producing modified starch size through bio-enzyme
  • Method for producing modified starch size through bio-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 40% acrylic acid solution as grafted monomer mixture. Add 500 g of ordinary potato 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, and adjust the pH value to 4-6 with acetic acid. Add 1 g of debranching enzyme, stir evenly, keep warm at 40 °C for 5 h, then raise the temperature to 80 °C for 30 min 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 min to remove dissolved oxygen in the solution. Weighed 25 g of acetylacetone and 250 mL of HRP with a concentration of 1 mg / L and mixed them...

Embodiment 2

[0033] Weigh 62 g of acrylic acid and 13 g of butyl acrylate and mix them uniformly as a graft comonomer. Add 500 g of ordinary cornstarch 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, and adjust the pH value to 4-6 with acetic acid. Add 1 g of debranching enzyme, stir evenly, keep warm at 40 °C for 5 h, then raise the temperature to 80 °C for 30 min 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 min to remove dissolved oxygen in the solution. Weighed 25 g of acetylacetone and 250 mL of HRP with a concentration of 1 mg / L and mixed them, then added them to the prepared starch milk, and added 30% HRP dropwise to the system at the same time. 2 o 2 Mix the solution with the acrylic monome...

Embodiment 3

[0036] 18 g of acrylic acid and 12 g of ethyl acrylate were weighed and mixed uniformly as graft comonomers. Add 200 g of ordinary cornstarch to 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, and adjust the pH value to 4-6 with acetic acid. Add 0.4 g of debranching enzyme, stir evenly, keep warm at 40°C for 3 h, then raise the temperature to 80°C for 20 min 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. Weighed 1 g of acetylacetone and 100 mL of HRP with a concentration of 1 mg / L and mixed them, then added them to the prepared starch milk, and added 30% HRP dropwise to the system at the same time. 2 o 2 Mix the solution with the acrylic monom...

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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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IPC IPC(8): C12P19/16C12P19/04C08F251/00D06M15/263
Inventor 张立勇杨书华宁福君谈大勇孙丽娥杨强张明君杨帅刘宏亮姜宜宽
Owner 袁于斐
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