Grafting starch having improved lateral branch construction, clean preparation and use thereof

A technology of grafting starch and side branches, which is applied to the field of starch-based sizing used for sizing of textile warp yarns, can solve the problems that the structure and performance of grafted starch sizing cannot take into account production cleanliness, rationality of structure and performance, etc. Good adhesion, good biodegradability, clean process effect

Inactive Publication Date: 2010-12-08
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The third is that there are no requirements for the production method, structure and performance application of grafted starch slurry that can take into account the cleanliness of production and the rationality of structure and performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A vinyl monomer mixture containing 50wt% of acrylamide, 20wt% of acrylic acid, 15wt% of methacrylic acid and 15wt% of maleic anhydride is dissolved in ethanol, isopropanol and water, and the weight ratio of ethanol, isopropanol and water is 6 : In a mixed solvent of 3:1, stir and dissolve to obtain a monomer solution containing acrylamide 19.23wt%, acrylic acid 7.69wt%, methacrylic acid 5.77wt%, maleic anhydride 5.77wt%, add sodium hypophosphite, The weight ratio of sodium hypophosphite to the monomer mixture is 0.75:100, and it is transferred into the liquid adder after being dissolved. Put 6wt% cornstarch with a viscosity of 12mPa·s at 95°C into a dry reactor with a stirring rod. The reactor is under normal pressure and has a reflux device, and 3vol% of the 30vol% hydrogen peroxide solution diluted with water is added. % hydrogen peroxide solution, wherein the weight ratio of 30vol% hydrogen peroxide solution and starch is 1:40, uniformly add the above-mentioned monom...

Embodiment 2

[0032]The vinyl monomer mixture that will contain acrylamide 90wt%, methacrylic acid 4.6wt% and maleic anhydride 5.4wt% is dissolved in the weight ratio of ethylene glycol, n-butanol and water that ethanol, n-butanol and water constitute are 6 : In a mixed solvent of 1:3, stir and dissolve to obtain a monomer solution containing 22.5wt% of acrylamide, 1.15wt% of methacrylic acid, and 1.35wt% of maleic anhydride, and add sodium hypophosphite, wherein sodium hypophosphite The weight ratio with the monomer mixture is 1:100, and it will be transferred into the liquid adder after being dissolved. Put 6wt% cornstarch with a viscosity of 4mPa·s at 95°C into a dry reactor with a stirring rod, the reactor is under normal pressure and has a reflux device, add 5wt% ammonium persulfate solution, ammonium persulfate and starch The weight ratio is 1:330, uniformly add the above monomer solution, wherein the weight ratio of starch and the above monomer mixture is 6:1, heat up to 65°C at a ra...

Embodiment 3

[0035] A vinyl monomer mixture containing 85wt% of acrylamide, 5wt% of acrylic acid, and 10wt% of maleic anhydride is dissolved in ethanol, ethylene glycol and water, and the weight ratio of ethanol, isopropanol and water is 4:2:4 In the mixed solvent, stirring and dissolving to obtain a monomer solution containing 28.33wt% of acrylamide, 1.67wt% of acrylic acid, and 3.33wt% of maleic anhydride, adding sodium hypophosphite, wherein the weight ratio of sodium hypophosphite to monomer mixture It is 0.75:100, after being dissolved, transfer it into the liquid adder. Put 6wt% cassava starch with a viscosity of 12mPa·s at 95°C into a dry reactor with a stirring rod. The reactor is under normal pressure and has a reflux device. % hydrogen peroxide solution, wherein the weight ratio of 30vol% hydrogen peroxide solution and starch is 1:40, uniformly add the above monomer solution, wherein the weight ratio of starch and the above monomer mixture is 3:1, at 2 The temperature was raised...

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Abstract

The invention provides a preparation method of grafting starch with an improved lateral branch composition which is characterized by comprising the following steps: radical polymerization is carried out between starch and a vinyl monomer containing a hydrophilic grouping, wherein, the vinyl monomer containing the hydrophilic grouping consists of acrylamide, maleic anhydride, acrylic acid and methacrylic acid; in the monomer, the weight percentage of each component is as follows: 50 to 90 percent of acrylamide, 0 to 15 percent of maleic anhydride, 0 to 20 percent of acrylic acid and 0 to 15 percent of methacrylic acid. The grafting starch manufactured by the method has a grafting rate of 8 to 18 percent, viscosity of 4 to 15mPa question mark s and a water ratio of 14 to 18 percent. The invention also provides the application of the grafting starch as the slurry for the sizing of a fiber containing fibrin like cotton fiber warp. The preparation method has the advantages of no waste water discharge and low energy consumption. The slurry of the formed grafting starch has the advantages of good hydrophilicity and blocking property, easy desizing as well as good biological degradability.

Description

technical field [0001] The invention relates to a grafted starch with improved side branch structure, its preparation method and its application as a size for textile warp yarn sizing, and belongs to the technical field of starch size for textile warp yarn sizing. Background technique [0002] The size used for textile warp yarn sizing is a material used for the smooth weaving of the warp yarn, so that the warp yarn can withstand the repeated friction of menacea, healds, reeds, adjacent yarns, etc. during weaving; stretching, bending and impact effects. The warp yarns of unsized staple fibers are held together only by twisting friction between fibers, and the structure is relatively loose and uneven, and there are many defects such as weak points, protrusions, thick points, etc.; there are many hairiness protruding from the surface of the yarn, which entangles adjacent yarns , Affect yarn throwing and opening. Therefore, the sizing agent for warp yarn sizing must endow the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C08F220/56C08F222/06C08F220/06D06M15/11D06M101/06
Inventor 郭腊梅郭良红
Owner DONGHUA UNIV
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