Preparation method for sulfonation modification type composite modified starch size

A technology of compound modified starch and sulfonation modification, applied in the field of slurry preparation, can solve the problems of insufficient serosal film performance, affecting the water dispersibility of slurry, limited steric hindrance, etc. The effect of enhanced serous properties, flexibility and segment mobility

Inactive Publication Date: 2016-03-16
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the volume of the acetate group is small, the steric hindrance is limited, and it is not significant enough to improve the size film performance. Therefore, people try to introduce longer ester groups into the starch molecular chain to further improve the size film performance of starch organic esters.
Starch octenyl succinate is a starch organic ester that introduces a longer ester group into the starch molecular chain. The steric hindrance effect of the long ester group is stronger than that of the acetate group, which can improve the size film properties of starch; However, the long ester group makes its hydrophobicity too strong, which affects the water dispersibility of the slurry and thus affects the adhesion performance

Method used

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  • Preparation method for sulfonation modification type composite modified starch size
  • Preparation method for sulfonation modification type composite modified starch size
  • Preparation method for sulfonation modification type composite modified starch size

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Embodiment 1

[0035] A preparation method of sulfonated modified composite modified starch size, comprising the following steps:

[0036] (1) Preparation of cationic starch:

[0037] Weigh 300 grams of cornstarch (dry weight), add water to make starch milk with a mass concentration of 40%, then transfer the starch milk into a 1000mL four-neck flask, install a stirring device, and then place the temperature in a water bath to 50°C , with a mass concentration of 3% sodium hydroxide solution to adjust the pH to 11 to 11.5, adding a mass concentration of 50% aqueous solution containing 12 grams of cationic etherifying agent 3-chloro-2-hydroxypropyltrimethylammonium chloride, Then use a 3% sodium hydroxide solution to adjust the pH to 11-11.5; after stirring for 8 hours, use a 3% hydrochloric acid solution to adjust the pH to 6.5-7; the product is filtered, washed 3 times with water, Dry at 45°C until constant weight, crush and sieve to obtain cationic starch.

[0038] (2) Preparation of catio...

Embodiment 2

[0045] A preparation method of sulfonated modified composite modified starch size, comprising the following steps:

[0046] (1) Preparation of cationic starch:

[0047] Weigh 300 grams of cornstarch (dry weight), add water to make starch milk with a mass concentration of 40%, then transfer the starch milk into a 1000mL four-neck flask, install a stirring device, and then place the temperature in a water bath to 50°C , with a mass concentration of 3% sodium hydroxide solution to adjust the pH to 11 to 11.5, adding a mass concentration of 50% aqueous solution containing 24 grams of cationic etherifying agent 3-chloro-2-hydroxypropyltrimethylammonium chloride, Then use a 3% sodium hydroxide solution to adjust the pH to 11-11.5; after stirring for 8 hours, use a 3% hydrochloric acid solution to adjust the pH to 6.5-7; the product is filtered, washed 3 times with water, Dry at 45°C until constant weight, crush and sieve to obtain cationic starch.

[0048] (2) Preparation of catio...

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Abstract

The invention discloses a preparation method for sulfonation modification type composite modified starch size. The preparation method comprises the following steps: carrying out cationic denaturation on starch by using a cationic etherifying agent, i.e., 3-chloro-2-hydroxypropyltrimethyl ammonium chloride, so as to prepare cation starch; then subjecting the prepared cationic starch and octenyl succinate anhydride to an esterification reaction so as to prepare cation-octenyl succinate composite modified starch; and reacting the prepared cation-octenyl succinate composite modified starch with sodium bisulfite so as to prepare the sulfonation modification type composite modified starch size. Compared with the prior art, the prepared sulfonation modification type composite modified starch size has substantially improved size film performance and enhanced adhesion on synthetic fibers like terylene, better meets requirements of sizing of warp yarns, especially sizing of synthetic fibers like terylene, and can be applied to sizing of the warp yarns of cotton, hemp, viscose, polyester/cotton, polyester/hemp, polyester/viscose and other fibers on a common warp sizing machine or high-speed warp sizing machine.

Description

technical field [0001] The invention belongs to the field of sizing preparation for textile warp yarn sizing, and in particular relates to a preparation method of sulfonated modified composite modified starch sizing. Background technique [0002] During the weaving process of woven fabrics, warp yarns are not only subjected to the repeated friction of mechanical parts such as warp stoppers, healds and reeds, but also to the repeated stretching, bending and impact caused by the movement of various mechanisms of the loom. Unsized warp yarns have prominent hairiness on the surface and insufficient cohesion between fibers to withstand repeated stretching, friction, impact and bending during the weaving process. Therefore, through the above-mentioned complex mechanical actions, the warp yarns without sizing will gradually loosen, and the hairiness will increase, causing the warp yarns to stick to each other, resulting in unclear openings and weaving defects. Moreover, the loose ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/06C08B31/16D06M15/11D06M101/32
CPCC08B31/06C08B31/16D06M15/11D06M2101/32
Inventor 张朝辉董菁刘新华徐珍珍魏安方
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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