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Preparation method of oxidized starch cellulose composite adhesive

A composite adhesive and oxidized starch technology, which is applied in the direction of cellulose adhesive, starch-derived adhesive, adhesive type, etc., can solve the problems that starch adhesive is not environmentally friendly, pollutes the environment, and cannot be degraded , to achieve low cost, good compatibility, and increase the effect of intermolecular distance

Inactive Publication Date: 2016-08-31
ANYANG HUASEN PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In view of the above situation, in order to overcome the deficiencies in the prior art, the purpose of the present invention is to provide a preparation method of oxidized starch cellulose composite adhesive, which can effectively solve the problem that the existing starch adhesive is not environmentally friendly, cannot be degraded, and is harmful to the environment. Problems of pollution and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In the specific implementation of the present invention, it is realized by the following steps:

[0025] (1) Preparation of modified starch: Dissolve 5-10g starch in 100mL distilled water at 40-50℃, stir and dissolve evenly with a mechanical stirrer, add 2-3mg potassium permanganate, and adjust pH to 2-3 with hydrochloric acid , stir for 1 hour at 40-50 °C, continue to stir for 1 hour at 60-75 °C, add 2-4 mg of boric acid, react at 80 °C for 1 hour, then add 0.2-0.6 g of potassium aluminum sulfate, continue to stir for 2 hours to obtain modified starch colloid;

[0026] (2) Preparation of starch / cellulose composite gel: add zinc chloride to water, dissolve uniformly at 70-80°C, prepare 50ml of zinc chloride aqueous solution with a mass concentration of 40-60%, and then add 2-4g of fiber Add 50-200ml of modified starch colloid, stir at 60-80°C for 3-6 hours, Cooled to room temperature to obtain oxidized starch cellulose composite adhesive.

Embodiment 2

[0028] In the specific implementation of the present invention, it can also be realized by the following steps:

[0029] (1) Preparation of modified starch: Dissolve 7-12g starch in 100mL distilled water at 70-80℃, stir and dissolve evenly with a mechanical stirrer, add 5-8mg potassium permanganate, and adjust pH to 2-3 with hydrochloric acid , stir at 70-80 °C for 1 hour, continue to stir at 80-95 °C for 1 hour, add 4-6 mg of boric acid, react at 90 °C for 1 hour, then add 0.4-0.8g aluminum potassium sulfate, continue to stir for 2 hours to obtain modified starch colloid;

[0030] (2) Preparation of starch / cellulose composite gel: add zinc chloride to water, dissolve evenly at 80-95°C, prepare 50ml of zinc chloride aqueous solution with a mass concentration of 50-70%, and then add 2-4g of fiber 1-3 hours at 80-95°C to dissociate the cellulose into a uniformly dispersed solution with a micron fiber length, add 50-200ml of modified starch colloid, stir at 70-90°C for 3-6 hours...

Embodiment 3

[0032] In the specific implementation of the present invention, it is realized by the following steps:

[0033] (1) Preparation of modified starch: Dissolve 10 g of starch in 100 mL of distilled water at 50 °C, stir and dissolve evenly with a mechanical stirrer, add 2 mg of potassium permanganate, adjust pH to 2-3 with hydrochloric acid, and stir at 50 °C for 1 hour , continue to stir for 1 hour at 75 °C, add 2 mg of boric acid, react at 90 °C for 1 hour, then add 0.6 g of potassium aluminum sulfate (alum), and continue to stir for 2 hours to obtain the colloid of modified starch;

[0034] (2) Preparation of starch / cellulose composite gel: add zinc chloride into water, dissolve uniformly at 80°C, prepare 50ml of zinc chloride aqueous solution with a mass concentration of 65%, add 3g of cellulose, and stir at 80°C For 1-3 hours, dissociate the cellulose to a uniformly dispersed solution with a micrometer level of fiber length, add 50 ml of modified starch colloid, stir at 80° C...

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PUM

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Abstract

The invention relates to a preparation method of an oxidized starch cellulose composite adhesive, and can effectively solve the problems of environmental unfriendliness, no degradability, environmental pollution and high cost in existing starch adhesives. The method comprises: dissolving starch in distilled water, adding potassium permanganate, using hydrochloric acid to adjust the pH to 2-3, performing stirring at 40-80DEG C for 1h, further conducting stirring at 60-95DEG C for 1h, adding boric acid, carrying out reaction at 80-90DEG C for 1h, then adding aluminum potassium sulfate, and further performing stirring for 2h to obtain colloid of modified starch; adding zinc chloride into water and dissolving it evenly at 70-95DEG C, adding cellulose, performing stirring at 70-95DEG C for 1-3h, dissociating cellulose to a uniformly dispersed solution with micron-scale fiber length, adding the colloid of modified starch, conducting stirring at 60-90DEG C for 3-6h, and performing cooling to room temperature, thus obtaining the oxidized starch cellulose composite adhesive. The oxidized starch cellulose composite adhesive prepared by the method provided by the invention has the advantages of environmental protection, high mechanical strength, degradability, low cost, and room temperature fluidity.

Description

technical field [0001] The invention relates to chemical industry, in particular to a preparation method of an oxidized starch cellulose composite adhesive. Background technique [0002] After high temperature gelatinization, starch has a long history as a binder because of its better adhesive properties. Starch adhesive is a viscous liquid or easily soluble solid material made of starch and water as the main raw materials through gelatinization, oxidation or esterification, and grafting. According to different modification methods, it can be divided into gelatinized starch adhesive. agent, oxidized starch binder, esterified starch binder, grafted starch binder. [0003] Oxidized starch itself is insoluble in water and has no viscosity. After adding the gelatinizer NaOH, the carboxyl group becomes a sodium salt, which increases the hydrophilicity and solubility. The interaction force is weakened, the adhesive becomes thicker after swelling and gelatinization, and it is mod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J103/10C09J101/04C08B31/18C08B15/02C08J3/24C08J3/075C08L3/10
CPCC09J103/10C08B15/02C08B31/185C08J3/075C08J3/24C08J2303/10C08L2201/06
Inventor 刘洁孟艳芳贺文明朱秋荣
Owner ANYANG HUASEN PAPER