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Process for preparing nano-starch powder

A nano-starch and powder technology, applied in the field of nano-materials and nano-materials, can solve the problems of biological characteristics of polluted raw starch, uneven particle size distribution, uneven hydrolysis rate, etc., and achieve easy industrialization, easy processing, and good uniformity Effect

Inactive Publication Date: 2008-07-09
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the inherent molecular structure characteristics of starch, there are certain limitations when using the above single methods for micronization treatment.
For example, when using physical methods to prepare fine starch, there is a crushing limit for starch granules. When the granules are fine enough to a certain extent, despite the action of mechanical energy such as shear force, the particle size will no longer continue to decrease with the increase of energy, and Long cycle, large particle size, and uneven particles; if acid, alkali or biological enzymes are used for hydrolysis, because the hydrolysis rate is uneven and the process is difficult to control, the product is hydrolyzed into dextrin, maltose or finally glucose, and the product yield is low; In the reverse microemulsion method, toxic substances such as toluene, chloroform or phosphorus oxychloride are often used in the experiment, which pollutes the biological characteristics of the original starch, and the particle size distribution is uneven
[0004] And take industrial starch as raw material, adopt the method for the combination of ultrasonic high-energy radiation and acid hydrolysis to prepare nano-starch powder, there is no report yet

Method used

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  • Process for preparing nano-starch powder
  • Process for preparing nano-starch powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) In a container containing deionized water, add 3‰ (mass percentage) of sodium lauryl sulfate to dilute evenly, then add corn starch and stir evenly, the starch concentration in the solution is 8%;

[0023] (2) Place the radiation head of the high-energy ultrasound in the middle of the starch solution, and set the program: high-energy ultrasound works for 5 seconds, intermittently for 3 seconds, and after continuous operation for 20 minutes, intermittently for 10 minutes to complete a cycle. During the treatment, the temperature in the solution should be observed to keep it below 50°C. The increase in temperature can extend the intermittent time. After completing 5 cycles of work in this way (the actual effect of ultrasound is about 1 hour, the whole process is about 4 hours), turn off the ultrasound and take out the solution;

[0024] (3) Place the above solution in a water bath at 45°C, slowly add 15% hydrochloric acid to make the concentration of hydrochloric acid in ...

Embodiment 2

[0028] (1) In a container with deionized water, add 5‰ (mass percentage) of sodium lauryl sulfate to dilute evenly, then add corn starch and stir evenly, the starch concentration in the solution is 10%;

[0029] (2) Place the radiation head of the high-energy ultrasound in the middle of the starch solution, and set the program: high-energy ultrasound works for 3 seconds, intermittently for 2 seconds, and after continuous operation for 25 minutes, intermittently for 15 minutes to complete a cycle. During the treatment, the temperature in the solution should be observed to keep it below 50°C. The increase in temperature can extend the intermittent time. After completing 4 cycles of work (the actual effect of ultrasound is about 1 hour, the whole process is about 4 hours), turn off the ultrasound and take out the solution;

[0030] (3) Put the above solution in a water bath at 45°C, slowly add 12% sulfuric acid to make the concentration of sulfuric acid in the solution 8% under the s...

Embodiment 3

[0034] (1) In a container with deionized water, add 5‰ (mass percentage) of sodium lauryl sulfate to dilute evenly, then add corn starch and stir evenly, the starch concentration in the solution is 15%;

[0035] (2) Place the radiation head of the high-energy ultrasound in the middle of the starch solution, and set the program: high-energy ultrasound works for 4 seconds, intermittently for 2 seconds, after continuous working for 18 minutes, intermittently for 15 minutes to complete a cycle. During the treatment, the temperature in the solution should be observed to keep it below 50°C. The increase in temperature can extend the intermittent time. After completing 8 cycles of work (the actual effect of ultrasound is about 1.5 hours, the whole process is about 5 hours), turn off the ultrasound and take out the solution;

[0036] (3) Place the above solution in a water bath at 48°C, slowly add 15% nitric acid to make the concentration of nitric acid in the solution 10% under the stirr...

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Abstract

The invention provides a process for preparing nanometer fecula powder body material, the process comprises first, adding technical-grade cornstarch in deionized water which contains a certain amount of dispersing agent to prepare homogeneous dispersion solution whose density is 5% to 15% (starch quality percentage), second, adopting high-energy ultrasonic wave to intermittently deal the solution for 3-5 hours under the condition of guaranteeing the system temperature which is not lower than 50 DEG C, third, placing the solution in a 40 DEG C to 50 DEG C water bath vessel to stir with a stirrer, and slowly adding acid into the solution till the density in the acid is 5% to 10% to react in constant temperature for one hour, fourth, pumping and filtering the solution which is reacted, and washing products with NaOH dilute solution to neutral, respectively washing with deionized water and absolute ethyl alcohol for several times, finally, abrading the samples in 60DEG C to 80 DEG C for 2-4 hours to get nanometer starch products. All the raw material of the process is sold in markets, raw material is wide, the reaction process can be controlled, reproduction quality is excellent, and production cost is low. The nanometer starch starches which are prepared by the invention takes ball shape, the size of the starch diameter is evenly distributed, and the major function group of original starch is not changed, and the starch is not polluted and can be used as carriers of biological medicine or food additives, thereby the invention has wide application prospect.

Description

Technical field [0001] The invention relates to a new method for preparing nano starch powder by combining ultrasonic high-energy radiation and acid hydrolysis, and belongs to the field of nano materials and nano technology. Background technique [0002] Starch is a polysaccharide polymer compound composed of glucose. It has two structures: branched chain and straight chain. It is widely found in plant seeds, tubers and fruits. It is a non-toxic, biodegradable, and resource-rich green product. As the particle size decreases, the specific surface area of ​​starch granules increases, so it has obvious surface effect, which enhances the adsorption, agglutination, chemical activity and other physical and chemical properties of starch. It can be used as an adsorption carrier for pharmaceuticals, pigments, fragrances, and pesticides Embedding agent, widely used in medicine, pesticide, daily chemical, food, textile, papermaking, metallurgy and petroleum industries. Since the preparation...

Claims

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Application Information

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IPC IPC(8): C08J3/12C08B3/02
Inventor 李庆林华
Owner SOUTHWEST UNIVERSITY
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