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Preparation method of high-performance starch slurry

A technology of high-performance starch slurry and modified starch, which is applied in the field of preparation of high-performance starch slurry by biological method and the preparation of high-performance starch slurry by using starch branching enzyme, which can solve the problem that the film-forming performance is not significantly improved by the adhesion of pulp fibers, Affecting the application effect of sizing, difficult to control the grafting process, etc., to achieve the effect of lowering the gelatinization temperature, improving the adhesion performance, and mild preparation conditions

Active Publication Date: 2015-12-30
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the disadvantages of harsh grafting conditions, difficult control of the grafting process, and easy production of by-products in various existing chemical grafting modification methods, especially due to the limitation of the composition and structure of the starch itself, the film-forming performance of the product and the impact on the The adhesion performance of the sizing fiber is not significantly improved, which seriously affects its sizing application effect
The current grafted starch size cannot completely or in high proportion replace the hard-to-biodegrade polyvinyl alcohol size

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1 Utilizes starch branching enzyme to prepare cornstarch slurry with high branching degree and high performance

[0011] Disperse cornstarch in water with a mass concentration of 30%, stir and heat up to 50°C, add 100U / g cornstarch starch branching enzyme, stir and react at a constant temperature of 50°C for 7 hours, filter, centrifuge and dehydrate, and dry to obtain Modified hyperbranched corn starch sizing.

[0012] After testing, the degree of branching of corn starch increased from 72% before modification to 91%; the complete gelatinization temperature decreased from 71°C to 62°C of the original starch, and the viscosity increased from 45mPa·s to 55mPa·s, 5-10 Placed at ℃ for 24 hours without freezing or water separation, the stability of the slurry at 95℃ increased from 85% to 96%; the adhesion to 13tex pure cotton roving increased from 52.5N to 68N, an increase of 29.5%, and to 14.5tex The adhesion force of polyester-cotton roving increased from 85.3N...

Embodiment 2

[0013] Embodiment 2 Utilizes starch branching enzyme to prepare high-branching high-performance corn starch slurry

[0014] Disperse cornstarch in water with a mass concentration of 10%, stir and heat up to 40°C, add 30U / g of cornstarch starch branching enzyme, stir and react at a constant temperature of 60°C for 8 hours, filter, centrifuge and dehydrate, and dry to obtain processed Modified hyperbranched corn starch sizing.

[0015] After testing, the branching degree of corn starch increased from 70% before modification to 89%; Placed under the same conditions for 24 hours without freezing and water separation, the stability of the slurry at 95°C increased from 84% to 93%; the adhesion to 13tex pure cotton roving increased from 53N to 67N, and the adhesion to 14.5tex polyester-cotton roving The force is increased from 87 to 105N.

Embodiment 3

[0017] Disperse cornstarch in water with a mass concentration of 40%, stir and heat up to 60°C, add 150U / g cornstarch starch branching enzyme, stir and react at a constant temperature of 60°C for 8 hours, filter, centrifuge and dehydrate, and dry to obtain processed Modified hyperbranched corn starch sizing.

[0018] After testing, the branching degree of corn starch increased from 73% before modification to 89%; Placed under the same conditions for 24 hours without freezing or water separation, the stability of the slurry at 95°C increased from 86% to 94%; the adhesion to 13tex pure cotton roving increased from 54N to 68N, and the adhesion to 14.5tex polyester-cotton roving The force is increased from 89 to 108N.

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Abstract

The invention discloses a preparation method of high-performance starch slurry. The preparation method comprises the steps of dispersing starch with the mass concentration of 10-40% into water; stirring and heating to 40-60 DEG C; reacting for 3-8 hours through stirring a starch branching enzyme at the constant temperature of 40-60 DEG C, wherein 30-150U / g starch is added into the starch branching enzyme; and filtering, centrifugally dehydrating and drying to obtain modified high-performance starch slurry with high branching degree. Compared with unmodified starch, the high-performance starch slurry has the advantages that the gelatinization temperature is reduced, the slurry is not frozen at room temperature, the flowability is favorable, and the adhesion to a pulpified yarn is improved to a relatively high extent.

Description

technical field [0001] The invention relates to a method for preparing high-performance starch size by biological method, in particular to a method for preparing high-performance starch size by using starch branching enzyme, which belongs to the technical field of textile processing application. Background technique [0002] As a natural macromolecule with a wide range of sources, starch has good biocompatibility and environmental friendliness. In the textile industry, starch is a very important warp sizing material used to improve the weavability of warp yarns. Native starch is composed of two molecules, amylose and amylopectin. The former is connected into a linear polymer by α-1,4 glycosidic bonds, and the latter is connected by α-1,4 glycosidic bonds on the main chain of α-1,4 linear polymer. , 6 glycosidic bonds form branched chains. The different molecular structures of starch lead to different intramolecular and intermolecular interactions and even different aggrega...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B30/20
Inventor 范雪荣崔莉王强徐进袁久刚余圆圆王平张颖
Owner JIANGNAN UNIV
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