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Dual etherified starch, preparing method, and application of dual etherified starch

An etherified starch, dual technology, applied in fiber processing, textiles and papermaking, fiber types, etc., can solve the problems of poor serosal mechanical properties, poor starch adhesion, etc., and achieve improved serosal mechanical properties, high adhesion, Good serosal mechanical properties

Inactive Publication Date: 2017-05-31
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention also provides an application of double etherified starch as textile size, which overcomes the defects of poor adhesion of starch and poor mechanical properties of size film

Method used

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  • Dual etherified starch, preparing method, and application of dual etherified starch
  • Dual etherified starch, preparing method, and application of dual etherified starch
  • Dual etherified starch, preparing method, and application of dual etherified starch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of double etherified starch, comprising the following steps:

[0038] 1) Disperse 324g (dry weight) of acid-thinned cornstarch in distilled water containing 32.4g of sodium sulfate to make a 40% (w / w) starch emulsion, transfer the starch emulsion into a 1000mL four-neck flask, and put The stirring device is placed in a water bath, the pH of the system is adjusted to 10-11.5 with a 3% sodium hydroxide solution, and the temperature is raised to 45° C. to keep the temperature.

[0039] 2) Weigh 10g of 2-dimethylaminochloroethane hydrochloride, add 10mL of water to dissolve it, put it into a 100mL beaker, neutralize it with 3mol / L sodium hydroxide solution, add 10g of 3- Sodium chloro-2-hydroxypropylsulfonate, a mixed aqueous solution composed of 2.04g sodium hydroxide and 27g water, stirred evenly; the molar ratio of sodium hydroxide to sodium 3-chloro-2-hydroxypropylsulfonate is 1:1;

[0040] 3) Add the mixed solution prepared in step 2) to the starc...

Embodiment 2

[0044] A preparation method of double etherified starch, comprising the following steps:

[0045] 1) Disperse 324g (dry weight) of acid-thinned cornstarch in distilled water containing 32.4g of sodium sulfate to make a 40% (w / w) starch emulsion, transfer the starch emulsion into a 1000mL four-neck flask, and put The stirring device is placed in a water bath, the pH of the system is adjusted to 10-11.5 with a 3% sodium hydroxide solution, and the temperature is raised to 45° C. to keep the temperature.

[0046] 2) Weigh 16g of 2-dimethylaminochloroethane hydrochloride, add 16mL of water to dissolve it, put it into a 100mL beaker, neutralize it with 3mol / L sodium hydroxide solution, add 16g of 3-chloro - Sodium 2-hydroxypropyl sulfonate, a mixed aqueous solution formed by 3.26g sodium hydroxide and 37g water, stirred evenly, the molar ratio of sodium hydroxide to 3-chloro-2-hydroxypropyl sodium sulfonate is 1:1;

[0047] 3) Add the mixed solution prepared in step 2) to the star...

Embodiment 3

[0051] A preparation method of double etherified starch, comprising the following steps:

[0052] 1) Disperse 324g (dry weight) of acid-thinned cornstarch in distilled water containing 32.4g of sodium sulfate to make 40% (w / w) starch milk, transfer the starch milk into a 1000mL four-neck flask, and put The stirring device is placed in a water bath, and the pH of the system is adjusted to 10-11.5 with a sodium hydroxide solution with a mass fraction of 3%, and the temperature is raised to 45°C to keep the temperature;

[0053] 2) Weigh 26g of 2-dimethylaminochloroethane hydrochloride, add 26mL of water to dissolve it, put it in a 100mL beaker, neutralize it with 3mol / L sodium hydroxide solution, add 26g of 3-chloro -Sodium 2-hydroxypropyl sulfonate, a mixed aqueous solution formed by 4.23g sodium hydroxide and 45g water, stir evenly, the molar ratio of sodium hydroxide to 3-chloro-2-hydroxypropyl sulfonate sodium is 1:1;

[0054] 3) Add the mixed solution prepared in step 2) t...

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Abstract

The invention provides dual etherified starch, a preparing method, and application of the dual etherified starch. According to the technical scheme, tertiary amine positive ions in starch are etherified and sulpho-2-hydroxypropyl in the starch is subjected to etherification and denaturating treatment, the product is neutralized (tertiary amine is subjected to protonation to form positive ion perssad), dehydrated, washed and dried to form dual etherified amphoteric starch slurry. Through the method of adding dimethyl ammonium chloride ethyl and sulfonic acid group hydroxypropyl functional groups while performing the dual etherification and denaturating treatment, the structural defects of the starch are overcome, the mechanical property of starch slurry film is improved, the adhesive force of the starch to fibers like cotton is improved, the using effect of the starch slurry in warp starching of natural fiber and particularly in warp starching of purified cotton is better improved, which is conducive to improvement of the sizing warp quality and improvement of the weaving efficiency.

Description

technical field [0001] The invention belongs to the field of textiles, and in particular relates to a double etherified starch, a preparation method and an application thereof, which have high adhesion and good mechanical properties of the serosity film. Background technique [0002] During the weaving process, the warp yarn not only has to bear the friction between the warp yarns and the mechanical parts such as the warp yarn and the heddle eye, the shuttle board and the weft insertion device, but also has to withstand the repeated stretching, twisting and tearing of various mechanisms up to thousands of times. Shock effect. However, warp yarns without sizing have a large amount of hairiness on the surface, and the warp yarns will be entangled with each other under the above-mentioned various effects during weaving, causing unclear openings and unable to weave smoothly; in addition, the cohesion between the yarn fibers is low, As a result, the sliver is fluffy and the stre...

Claims

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Application Information

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IPC IPC(8): C08B31/12D06M15/11
CPCC08B31/125C08B31/12D06M15/11D06M2200/40
Inventor 李伟祝志峰徐珍珍刘新华李长龙刘立超
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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