Preparation method of etherification pretreatment type quaternary ammonium cation grafted starch sizing agent

A technology of quaternary ammonium cation grafted starch, which is applied in the field of preparation of etherified pretreated quaternary ammonium cation grafted starch slurry, can solve the problems of increasing the consumption of monomer raw materials, affecting the performance of use, increasing production costs, etc., and achieving Improve the hard and brittle defects of the size film, reduce the wear and improve the toughness

Active Publication Date: 2019-03-19
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production of homopolymer not only seriously affects the performance of the product, but also increases the consumption of monomer raw materials, reduces the grafting efficiency, and increases the production cost. Therefore, it is necessary to pretreat the starch raw material to improve the grafting efficiency. transsexual

Method used

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  • Preparation method of etherification pretreatment type quaternary ammonium cation grafted starch sizing agent
  • Preparation method of etherification pretreatment type quaternary ammonium cation grafted starch sizing agent
  • Preparation method of etherification pretreatment type quaternary ammonium cation grafted starch sizing agent

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Embodiment 1

[0039] A preparation method for etherified pretreatment type quaternary ammonium cationic grafted starch slurry, comprising the following steps:

[0040] (1) Preparation of allyl etherified pretreated starch:

[0041] Take by weighing 200 grams of cornstarch (dry weight), be dispersed in the isopropanol-water solution of 80% isopropanol mass concentration, make the starch milk that mass concentration is 30%, the four-necked flask that starch milk is moved into 1000 milliliters , install a stirring device, then place it in a water bath and heat up to 30°C, and evenly add dropwise a sodium hydroxide solution with a mass concentration of 2% while stirring (the molar ratio of sodium hydroxide to allyl chloride is 1.5:1 ), after the dropwise addition, continue to stir and basify for 30 minutes; then at 30°C, add the isopropanol solution of allyl chloride evenly while stirring (the molar ratio of allyl chloride to starch is 0.04:1, Allyl chloride is dissolved in the isopropanol sol...

Embodiment 2

[0047] A preparation method for etherified pretreatment type quaternary ammonium cationic grafted starch slurry, comprising the following steps:

[0048] (1) Preparation of allyl etherified pretreated starch:

[0049] Take by weighing 200 grams of cornstarch (dry weight), be dispersed in the isopropanol-water solution of 80% isopropanol mass concentration, make the starch milk that mass concentration is 30%, the four-necked flask that starch milk is moved into 1000 milliliters , install a stirring device, then place it in a water bath and heat up to 30°C, and evenly add dropwise a sodium hydroxide solution with a mass concentration of 2% while stirring (the molar ratio of sodium hydroxide to allyl chloride is 1.5:1 ), after the dropwise addition, continue to stir and basify for 30 minutes; then at 30°C, add the isopropanol solution of allyl chloride evenly while stirring (the molar ratio of allyl chloride to starch is 0.04:1) , control the rate of addition so that it is added...

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Abstract

The invention provides a preparation method of an etherification pretreatment type quaternary ammonium cation grafted starch sizing agent. The preparation method comprises the following steps: by taking allyl chloride as an etherifying agent, performing etherification pretreatment on starch raw materials, and introducing allyl atomic groups containing carbon-carbon double bonds onto starch molecular chains; carrying out a graft copolymerization reaction on the allyl etherification pretreatment starch containing the carbon-carbon double bonds and a quaternary ammonium cation monomer in an aqueous phase non-gelatinized state in the presence of an initiator, thereby obtaining the etherification pretreatment type quaternary ammonium cation grafted starch sizing agent. Compared with the prior art, the starch sizing agent prepared by the method disclosed by the invention inherits the biodegradability of starch, the defects that the starch size film is hard and brittle and insufficient in fiber adhesion can be further improved, the grafting efficiency can be improved, and the warp sizing requirement is well met.

Description

technical field [0001] The invention belongs to the field of preparation of sizing material used in textile warp yarn sizing, and in particular relates to a preparation method of etherification pretreatment type quaternary ammonium cationic grafted starch sizing material. Background technique [0002] In the weaving process of woven fabrics, the warp yarn per unit length is unwound from the weaving shaft until it forms a fabric, which is subject to repeated stretching, buckling and abrasion of 3000 to 5000 times. The surface hairiness of unsized warp yarns is prominent, and the cohesion between fibers is insufficient. Under the action of this complex mechanical force, the yarn body is fluffed, the fibers are free, the yarn disintegrates, and ends are broken; This leads to unclear openings, the formation of weaving defects, and finally, the normal weaving process cannot be carried out. Therefore, generally single yarns and strands below No. 10 must be slashed. [0003] The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/34C08F226/02D06M15/11D06M15/267D06M15/356C08B31/08
CPCC08B31/08C08F251/00D06M15/11D06M15/267D06M15/3562D06M2200/40C08F220/34C08F226/02
Inventor 张朝辉董菁徐珍珍
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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