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A kind of oxidized hydroxypropyl carboxymethyl starch slurry and preparation method

A technology for oxidizing hydroxypropyl carboxymethyl and starch slurry, which is applied in textiles and papermaking, fiber processing, plant fibers, etc., can solve problems such as no hydroxypropyl carboxymethyl starch sizing that has not been seen, and achieve low cost. , Improve sizing performance, good viscosity stability

Inactive Publication Date: 2017-05-31
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there is no report that oxidized hydroxypropyl carboxymethyl starch size is used as textile warp yarn sizing

Method used

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  • A kind of oxidized hydroxypropyl carboxymethyl starch slurry and preparation method

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Effect test

Embodiment 1

[0017] The preparation method of the oxidized hydroxypropyl carboxymethyl starch slurry of the present embodiment, the steps are as follows:

[0018] (1) Add 95g of cornstarch and 2g of urea to 160mL of 80% ethanol aqueous solution, stir evenly, then add 2g of sodium hydroxide, and carry out alkalization reaction at 25°C for 35min;

[0019] (2) Add 5g of propylene oxide after alkalization, raise the temperature to 60°C, stir well and carry out etherification reaction for 10h, after the reaction, cool down to 50°C, and then add 0.1g of 50% H 2 o 2 Oxidation reaction 55min;

[0020] (3) Add 5g of chloroacetic acid after the oxidation reaction, raise the temperature to 65°C for 135 minutes, cool down to 35°C after the reaction, wash, filter with suction, dry at 80°C, and pulverize to obtain the product.

Embodiment 2

[0022] The preparation method of the oxidized hydroxypropyl carboxymethyl starch slurry of the present embodiment, the steps are as follows:

[0023] (1) Add 105g of cornstarch and 15g of urea to 200mL of 95% ethanol aqueous solution, stir evenly, then add 10g of sodium hydroxide, and carry out alkalization reaction at 35°C for 25 minutes;

[0024] (2) Add 40g of propylene oxide after alkalization, raise the temperature to 75°C, stir evenly and carry out etherification reaction for 8 hours, cool down to 55°C after the reaction, and then add H 2 o 2 Oxidation reaction 1h;

[0025] (3) Add chloroacetic acid after the oxidation reaction, raise the temperature to 75°C for 2 hours, cool down to 40°C after the reaction, wash, filter with suction, dry at 80°C, and pulverize to obtain the product.

Embodiment 3

[0027] An oxidized hydroxypropyl carboxymethyl starch slurry, which is made of the following raw materials in parts by weight: 95-105 parts of corn starch, 3-15 parts of urea, 160-200 parts of ethanol aqueous solution, sodium hydroxide 2~10 parts, 5~40 parts of propylene oxide, H 2 o 2 0.1~2 parts, 5~10 parts of chloroacetic acid; the hydroxypropyl substitution degree (MS) of the oxidized hydroxypropyl carboxymethyl starch slurry is 0.1~0.5, and the carboxymethyl substitution degree (DS) is 0.05~0.40, The viscosity is 5~20 mPa•s.

[0028] The preparation method of the oxidized hydroxypropyl carboxymethyl starch slurry of the present embodiment, the steps are as follows:

[0029] (1) Add 100g of cornstarch and 8g of urea to 180mL of 85% ethanol aqueous solution, stir evenly, then add 5g of sodium hydroxide, and carry out alkalization reaction at 30°C for 30 minutes;

[0030] (2) Add propylene oxide after alkalization, raise the temperature to 70°C, stir evenly and carry out ...

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Abstract

The invention discloses an oxidized hydroxypropyl carboxymethyl starch slurry material which is prepared from following raw materials, by weight: 95-105 parts of corn starch, 3-15 parts of urea, 160-200 parts of an ethanol water solution, 2-10 parts of sodium hydroxide, 5-40 parts of propylene epoxide, 0.1-2 parts of H2O2 and 5-10 parts of chloroacetic acid. The preparation method includes following steps: adding the corn starch and the urea to the ethanol water solution; adding the sodium hydroxide to perform an alkalization reaction; adding the propylene epoxide after the alkalization reaction is finished to perform an etherification reaction; adding the H2O2 after the etherification reaction is finished to perform an oxidizing reaction for 55-65 min; adding the chloroacetic acid after the oxidizing reaction is finished; increasing the temperature to 65-75 DEG C and carrying out a reaction for 125-135 min; decreasing the temperature after reaction is finished; and washing, suction-filtering, air-drying and crushing the reaction product to obtain the slurry material. By means of the hydroxypropyl groups introduced into starch, the macromolecules in starch particles can fully swell, dissolve and expand when fully absorbing water. Meanwhile, the slurry material is good in viscosity stability, is transparent and is excellent in flowability.

Description

technical field [0001] The invention belongs to the technical field of textile size, and in particular relates to an oxidized hydroxypropyl carboxymethyl starch size and a preparation method. Background technique [0002] The purpose of sizing is to reduce the warp yarn breakage rate, improve the weavability and product quality of the warp yarn, endow the warp yarn with stronger wear resistance, fit the fiber hairiness on the surface of the yarn, improve the yarn strength, and keep the original warp yarn as much as possible. Some elasticity, to achieve the ideal weaving effect. Therefore, high-quality sizing materials should be selected for sizing. [0003] There are three types of commonly used textile size: polyvinyl alcohol (PVA), starch and modified starch, acrylic acid or acrylate. Among them, starch-based sizing accounts for about 70%, polyvinyl alcohol accounts for about 20%, and polyacrylic acid and other sizing materials account for about 10%. PVA is difficult to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B31/18C08B31/12D06M15/11D06M13/432D06M101/06
Inventor 武宗文尹振华刘宏臣周培文李俊礼周伟涛刘辉
Owner ZHONGYUAN ENGINEERING COLLEGE
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