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Waxy modified starch, preparation method and application thereof

A technology of modified starch and waxy starch, which is applied in the direction of textiles and papermaking, grafted polymer adhesives, adhesive types, etc., and can solve the problem that modified starch cannot meet the process requirements and cannot meet the special needs of starch performance, etc. problems, to achieve the effect of improving the performance of process products, low cost, and good viscosity stability

Inactive Publication Date: 2010-03-24
长春大成特用玉米变性淀粉开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the modified starch obtained by the above-mentioned one modification method or two kinds of compound modification still cannot meet the above-mentioned process requirements, and cannot meet the special needs of starch performance in papermaking, textile and other industrial application fields.

Method used

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  • Waxy modified starch, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1 Preparation of multiple compound modified waxy starch of the present invention

[0049] Put 1000 grams of pure amylopectin waxy starch (produced by Changchun Dacheng Industrial Group, the branched chain content is greater than 99.0%, and the B-point viscosity of the Brabender viscometer is greater than 620BU) and 1500 grams of clear water into a corrosion-resistant reactor with stirring In the process, keep the starch milk temperature at 40°C, adjust the pH to 7.5-8.5, add 90 grams of monomer acrylamide and 2 grams of initiator potassium persulfate, and react for 3 hours to detect that the grafting rate is greater than 90%; then adjust the pH to 9.5- 11.5, add 5 grams of cross-linking agent phosphorus oxychloride, and react at 25°C for 2.5 hours to detect that the sedimentation volume reaches 40-50; then slowly add 300 grams of sodium hypochlorite (available chlorine content is greater than 11.0%), and maintain the pH at 8.5-9.5 , reacted at 40° C. for 2 hour...

Embodiment 2

[0053] Example 2 The performance of multiple compound modified starch of the present invention

[0054] The powdery starch product of embodiment 1 is made into the starch paste that weight percent concentration is 1.0%, test the transparency and the viscosity of this starch paste, and respectively with oxidized waxy starch and oxidized acetylated waxy starch (acetyl group content is greater than 1.5%) made the same concentration of starch paste for comparison.

[0055] 1, the transparency of starch of the present invention

[0056] The transparency of the starch paste prepared with the modified starch of the present invention is one of the important indicators to illustrate the quality of the starch, which is related to the degree of aging. Generally, the transparency of those prone to aging is poor.

[0057] The test method of transparency is to take 50ml of 1.0% starch milk in a 100ml beaker, heat it in boiling water for gelatinization, stir for 15 minutes and keep the vo...

Embodiment 3

[0076] Example 3 Application test of modified starch of the present invention for textile sizing

[0077] The waxy modified starch prepared in Example 1 of the present invention was used as an adhesive in the textile industry to carry out a sizing experiment, and at the same time a comparative experiment was carried out with oxidized waxy starch and oxidized acetylated waxy starch.

[0078] The concentration of the starch slurry used in the test was 6%, and the viscosity at 95° C. was 13 cp. The results are shown in Table 3.

[0079] Table 3 Comparison of properties after sizing of three kinds of modified starches

[0080] performance

oxidized waxy starch

oxidized acetylated waxy starch

Starch of the present invention

wear / time

41

44

86

Breaking strength N

2.75

2.77

3.91

Elongation%

5.39

5.11

4.2

Break work n·cm

4.26

4.18

5.84

Specific adhesion %

...

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Abstract

The invention provides a method for producing multiplex composite modified starch using pure branched chain waxy starch as raw paderial and product obtained using the method and application thereof. The production method of the modified starch is a complex reaction of grafting, cross-linking and oxidizing. The multiplex modified starch has features of good paste viscosity stability, high transparency, strong shear force resistance, high water-solubility, good freezing stability and freeze-thawing stability. The modified starch is a good adhesive and can be widely used in food industry, paper industry and weaving industry, especially suitable for surface glue-applying and coating technology in paper industry and warp sizing technology for weaving industry.

Description

technical field [0001] The invention relates to a production method of multi-component composite modified starch, multi-component composite waxy modified starch prepared by the method, and the application of the waxy modified starch in papermaking industry or textile industry. The waxy modified starch obtained by the method of the present invention has excellent properties and is widely used in the fields of papermaking industry and textile industry, especially as surface sizing starch and coating starch in papermaking production, and as warp yarn sizing in textile industry Its performance is better than that of various existing modified starches, and it can partially or completely replace PVA or CMC. Background technique [0002] Modified starch is an important raw material in food, textile, papermaking, oil drilling, building materials, foundry, agricultural planting, medicine and other fields. [0003] High-quality adhesives (or binders), thickeners and stabilizers are r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F8/00C08F8/06C08J3/24C08L51/02C08K3/32C09J151/02D06M15/11D21H17/28D21H21/16
Inventor 郑庆信高德峰曹兰淼
Owner 长春大成特用玉米变性淀粉开发有限公司
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