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The production method of graft modified starch size

A modified starch and production method technology, applied in textiles, papermaking, fiber treatment, etc., can solve the problems of restricting the development of grafted modified starch size, the large demand of the textile industry, and the high price, so as to shorten the sizing processing time and speed up the production process. The effect of rapid promotion and short processing time

Inactive Publication Date: 2015-10-21
LANYAN GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, most of the starch graft copolymerization reactions for the preparation of grafted modified starch slurry are carried out by free radical polymerization, and most free radical reactions are initiated by chemical methods, mostly using high-valent cerium ions as initiators, which are expensive and expensive. The output is limited, and as a size, the textile industry has a large demand, which undoubtedly restricts the development of grafted modified starch size; at the same time, the grafting rate of the product is generally about 10% due to the chemically induced polymerization reaction, and it is difficult to make the grafted product Completely get rid of the weakness of starch size

Method used

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  • The production method of graft modified starch size
  • The production method of graft modified starch size
  • The production method of graft modified starch size

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Add NaOH solution to acrylic acid, control the pH of the solution to 5-7, and prepare sodium acrylate solution. The prepared sodium acrylate solution was mixed with a 35% solution containing acrylic acid as a grafted monomer mixture, wherein the molar ratio of sodium acrylate to acrylic acid was 1:6. Common potato starch was added to deionized water to prepare starch milk containing 30% starch, put it into an ultrasonic processor at room temperature, raise the temperature to 50°C, and turn on ultrasonic heat preservation for 25 minutes to obtain ultrasonically modified starch milk. The starch milk was transferred to the glow discharge reactor, and N was passed into the starch milk 2 10 min, while stirring slowly to lower the temperature of the reaction system to room temperature. Add the mixed monomer solution to the reaction system in proportion, wherein the mass ratio of starch milk to the mixed monomer solution is 70:10. Insert the electrode, continue to stir slowl...

Embodiment 2

[0034]Add NaOH solution to acrylic acid, control the pH of the solution to 5-7, and prepare sodium acrylate solution. Mix the prepared sodium acrylate solution with a 35% solution containing acrylic acid and butyl acrylate (acrylic acid and butyl acrylate molar ratio 10:1) as a grafted monomer mixture, wherein the molar ratio of sodium acrylate to acrylic acid is 1: 8. Ordinary cornstarch was added to deionized water to prepare starch milk containing 35% starch, put it into an ultrasonic processor at room temperature, raise the temperature to 45°C, and turn on ultrasonic heat preservation for 25 minutes to obtain ultrasonically modified starch milk. The starch milk was transferred to the glow discharge reactor, and N was passed into the starch milk 2 Oxygen in the system was replaced while stirring slowly to lower the temperature of the reaction system to 25°C. Add the mixed monomer solution to the reaction system in proportion, wherein the mass ratio of starch milk to the m...

Embodiment 3

[0037] Add NaOH solution to acrylic acid, control the pH of the solution to 5-7, and prepare sodium acrylate solution. The prepared sodium acrylate solution was mixed with a 30% solution containing acrylic acid and acrylonitrile (molar ratio 10:0.5) as a grafted monomer mixture, wherein the molar ratio of sodium acrylate to acrylic acid was 1:6. Common potato starch was added to deionized water to prepare starch milk containing 30% starch, put it into an ultrasonic processor at room temperature, raise the temperature to 50°C, and turn on ultrasonic heat preservation for 25 minutes to obtain ultrasonically modified starch milk. The starch milk was transferred to the glow discharge reactor, and N was passed into the starch milk 2 10 min while stirring slowly to lower the temperature of the reaction system to 25°C. Add the mixed monomer solution to the reaction system in proportion, wherein the mass ratio of starch milk to the mixed monomer solution is 80:20. Insert the electro...

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Abstract

The invention discloses a production method of graft modified starch size, comprising the following steps: firstly using an ultrasonic processor to carry out ultrasonic preprocessing on original starch milk; then adding acrylic mixed graft monomers in the system; inserting a glow discharge electrode to carry out glow discharge; trigger graft copolyreaction in the system; turning off a power supply; keeping the temperature of reaction system to be 35-50 DEG C; and carrying out a polymerization reaction for 2-3h so as to obtain loose graft starch. The graft reaction can be triggered efficiently through the glow discharge technology, the temperature is smooth to control in the triggering process, and the product graft rate is relatively high. The technology of ultrasonic preprocessing and glow discharge has the characteristics of being low in energy consumption, few in pollution, short in processing time and obvious in effect, so that the production process of the graft starch becomes a clean and efficient environmentally-friendly process.

Description

technical field [0001] The invention belongs to the field of textiles, in particular to a production method of grafted modified starch for yarn sizing. Background technique [0002] Denim is a thick-count high-density fabric with a high fabric density coefficient, and the fabric tightness coefficient of heavy denim is above 100%. The surface of denim is required to be flat and have clear lines. In order to achieve this effect, high tension and strong weft beating process should be used in weaving, and weaving should be done on fast-speed and high-tension shuttleless looms. In addition, the warp yarn of denim is dyed before weaving. This process does a lot of damage to the yarn, which needs to be compensated by sizing. Warp sizing is one of the key processes in denim production. Through sizing, the warp surface is covered with a smooth, wear-resistant, flexible and strong size film, and at the same time, part of the size penetrates into the yarn to increase the adhesion betw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C08F220/06C08F220/44C08F220/14C08F220/18C08F2/52D06M15/263D06M15/31
Inventor 李新民谈大勇宁福君范艳丽杨帅党亚红杨书华张明君李辉姜宜宽
Owner LANYAN GROUP
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