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A method of generating oxidized starch slurry slurry

A technology of oxidized starch and slurry, which is applied in the field of polymer material preparation, and can solve problems such as high energy consumption, long reaction time, and inconvenient operation

Active Publication Date: 2016-01-20
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the wet oxidation preparation process using sodium hypochlorite as the oxidant is commonly used, which is inconvenient to operate, takes a long time to react, consumes a lot of energy, and seriously pollutes the environment.

Method used

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  • A method of generating oxidized starch slurry slurry

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] According to the mass ratio of 1:13.5, take cornstarch and water respectively, and add cornstarch into water under the condition of stirring; take ammonium persulfate with 1‰ of the weight of the starch to be weighed, and add cornstarch and water under the condition of stirring, At the same time, sodium bisulfite was weighed according to the mass ratio of 1:0.6 and added to it. Under the condition that the stirring speed is constant, the mixed solution is heated to a temperature of 95-100° C. and kept for 20 minutes to obtain the oxidized starch slurry. When the mass concentration of the oxidized starch slurry is 6% and the temperature is 95° C., the viscosity of the gelatinized slurry is 12.2 cp, and the thermal viscosity stability is ≧85%.

Embodiment 2

[0037] According to the mass ratio of 1:13, take cornstarch and water respectively, and add cornstarch into water while stirring; take ammonium persulfate at 1.2‰ of the weight of the starch to be weighed, and add cornstarch and water while stirring, At the same time, sodium bisulfite was weighed according to the mass ratio of 1:0.6 and added to it. Under the condition that the stirring speed is constant, the mixed solution is heated to a temperature of 95-100° C. and kept for 20 minutes to obtain the oxidized starch slurry. When the mass concentration of the oxidized starch slurry is 6% and the temperature is 95° C., the viscosity of the gelatinized slurry is 11.5 cp, and the thermal viscosity stability is ≧90%.

Embodiment 3

[0039] According to the mass ratio of 1:13, take cornstarch and water respectively, and add the cornstarch into the water while stirring; take ammonium persulfate at 1.5‰ of the weight of the starch to be weighed, and add cornstarch and water while stirring, At the same time, sodium bisulfite was weighed according to the mass ratio of 1:0.6 and added to it. Under the condition that the stirring speed is constant, the mixed solution is heated to a temperature of 95-100° C. and kept for 20 minutes to obtain the oxidized starch slurry. When the mass concentration of the oxidized starch slurry is 6% and the temperature is 95° C., the viscosity of the gelatinized slurry is 10.8 cp, and the thermal viscosity stability is ≧90%.

[0040] The invention adopts an oxidation-reduction initiation system, which effectively improves the disadvantages of high viscosity and poor thermal viscosity stability of the original starch. The preparation method is simple and reliable, has low energy co...

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Abstract

The invention discloses a method for producing oxidized-starch sizing slurry. The method comprises the following steps of selecting starch, adding a proper volume of water, and uniformly stirring the starch and the water in a slurry blending barrel, so as to obtain a mixed solution; then, adding ammonium persulfate, of which the mass is 0.1%-0.15% the dry mass of the starch, in the case of stirring, then, weighing a corresponding mass of sodium bisulfite in accordance with that the mass ratio of ammonium persulfate / sodium bisulfite is 1: 0.6, and adding sodium bisulfite into the mixed solution; heating the mixed solution until the starch is completely gelatinized, thereby obtaining slurry, namely the oxidized-starch sizing slurry. According to the oxidized-starch sizing slurry prepared by the method disclosed by the invention, the process is simple and reliable, the viscosity and thermal viscosity stability of the slurry meet the sizing requirements, the cost is low, and environmental pollution is avoided.

Description

technical field [0001] The invention belongs to the technical field of polymer material preparation, and relates to a method for preparing modified starch slurry, in particular to a method for generating oxidized starch slurry. Background technique [0002] The preparation of oxidized starch slurry is to react starch with an oxidizing agent to break the amyloside bond to reduce the viscosity of the starch to obtain oxidized starch, and then put the oxidized starch into the mixing tank to heat and gelatinize with water to form a slurry . Oxidized starch size is often used as a sizing agent in the textile industry and a sizing agent in the paper industry. At present, the wet oxidation preparation process using sodium hypochlorite as the oxidant is commonly used, which is inconvenient to operate, takes a long time to react, consumes a lot of energy, and causes serious environmental pollution. Contents of the invention [0003] The purpose of the present invention is to prov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B31/18
Inventor 沈艳琴王卫武海良李舒婕
Owner XI'AN POLYTECHNIC UNIVERSITY