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Starch grafted acrylamide and preparation method and application thereof

A technology of starch grafting and acrylamide, applied in the direction of adding enhancers, can solve the problems of affecting the solubility of products, increasing energy consumption of cationic starch gelatinization, affecting the yield of final products, etc., so as to improve storage stability and improve water retention. , the effect of convenient operation

Inactive Publication Date: 2014-10-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Too many reaction steps in this process will affect the yield of the final product; gelatinization of cationic starch is required after the cationization reaction increases energy consumption and too many impurities in the final product will affect the solubility and storage stability of the product

Method used

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  • Starch grafted acrylamide and preparation method and application thereof
  • Starch grafted acrylamide and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0032] A kind of preparation method of starch grafted acrylamide, comprises the following steps:

[0033] (1) waxy cornstarch, swelling inhibitor and distilled water are mixed to make a starch suspension with a mass fraction of 10%; the swelling inhibitor is potassium chloride, and its addition is 15% of the weight of waxy cornstarch;

[0034] (2) Add lye to adjust the pH value of the starch suspension obtained in step (1) to 11, and alkalize it for 30 minutes at 30°C; add a cationic etherifying agent equivalent to 8% by weight of waxy corn starch in the thawed starch suspension, and heated up to 70°C for 1 h to obtain cationized starch paste;

[0035] The mass fraction of the lye is 20%, and the alkali in the lye is sodium hydroxide; the cationic etherifying agent is 3-chloro-2-hydroxypropyltrimethylammonium chloride;

[0036] (3) After cooling the starch paste obtained in step (2), add acrylamide monomer solution and cerium ammonium nitrate solution, pass through nitrogen p...

Embodiment 2

[0043] A kind of preparation method of starch grafted acrylamide, comprises the following steps:

[0044] (1) mixing waxy cornstarch, swelling inhibitor and distilled water to make a starch suspension with a mass fraction of 10%; adding swelling inhibitor sodium chloride, the amount of which is 10% of the waxy cornstarch weight;

[0045] (2) Add lye to adjust the pH value of the starch suspension obtained in step (1) to 11, and alkalize it for 15 minutes at 30° C.; add a cationic etherifying agent equivalent to 6% by weight of waxy corn starch In the thawed starch suspension, the temperature was raised to 90°C for 1 h to obtain a cationized starch paste;

[0046] The mass fraction of the lye is 20%, and the alkali in the lye is sodium hydroxide; the cationic etherification agent is 2,3-epoxypropyltrimethylammonium chloride;

[0047] (3) After cooling the starch paste obtained in step (2), add acrylamide monomer solution and potassium persulfate solution, pass through nitrogen p...

Embodiment 3

[0052] A kind of preparation method of starch grafted acrylamide, comprises the following steps:

[0053] (1) waxy corn starch, swelling inhibitor and distilled water are mixed to make a starch suspension with a mass fraction of 50%; the swelling inhibitor is potassium chloride, and its addition is 15% of the weight of waxy corn starch;

[0054] (2) Add lye to adjust the pH value of the starch suspension obtained in step (1) to 10, and alkalize it for 20 minutes at 30°C; add a cationic etherifying agent equivalent to 8% of waxy corn starch weight to the alkali In the thawed starch suspension, the temperature was raised to 70°C for 0.5h to obtain a cationized starch paste;

[0055] The mass fraction of the lye is 10%, and the alkali in the lye is potassium hydroxide; the cationic etherifying agent is 2,3-epoxypropyltrimethylammonium chloride;

[0056] (3) After cooling the starch paste obtained in step (2), add acrylamide monomer solution and ammonium persulfate solution, pass...

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Abstract

The invention discloses starch grafted acrylamide and a preparation method and application thereof. The preparation method comprises the following steps: preparing waxy corn starch milk and adding an expansion inhibitor; adding alkali to adjust the starch milk to a certain pH value, adding a cationic reagent, and performing a cationic reaction at the temperature of 70-90 DEG C; taking acrylamide as a monomer, adding an initiating agent, performing a graft copolymerization reaction in a water phase of 40-80 DEG C, separating, drying and smashing to obtain the starch grafted acrylamide. By adding the prepared starch grafted acrylamide into the wet part of a papermaking machine in a certain mass ratio, the physical strength of produced paper can be enhanced.

Description

technical field [0001] The invention belongs to the technical field of polymer preparation technology, and in particular relates to a starch-grafted acrylamide and its preparation method and application. Background technique [0002] Starch is rich in resources and is widely used in food, papermaking, textile, petroleum and other industries. It has become an important industrial raw material, especially in the papermaking industry, where its application ratio ranks first. Starch is a natural high molecular polymer in which amylopectin and amylose components are naturally mixed. Amylose has good film-forming and gelling properties, while amylopectin is widely used in food and packaging materials due to its functions of anti-aging, freeze-thaw stability, thickening, high expansion and water absorption. , water-soluble and biodegradable films, pharmaceutical and construction industries and other fields. [0003] Waxy corn starch is a fully branched chain structure, which is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/56C08B31/12D21H21/20
Inventor 杨仁党刘进吴福胜杨飞
Owner SOUTH CHINA UNIV OF TECH
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