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Starch nanoparticle sedimentation preparation method through treatment of starch water solution by adopting ultrasonic wave

A starch nano-processing technology, applied in the field of nano-materials, can solve the problems of wide particle size distribution of starch nanoparticles, low product quality, and low production efficiency, and achieve product quality improvement, production efficiency improvement, and production cost reduction. Effect

Inactive Publication Date: 2015-12-30
JILIN UNIV
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Problems solved by technology

The disadvantage of this method is that to obtain starch nanoparticles with smaller particle size, a highly diluted starch solution and a large amount of non-solvent must be used. 20 times the volume, therefore, the production efficiency is low, and the production cost is high; in addition, the speed of solvent and non-solvent exchange is too fast, and the particle size distribution of starch nanoparticles obtained is wide, and the product quality is not high

Method used

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  • Starch nanoparticle sedimentation preparation method through treatment of starch water solution by adopting ultrasonic wave
  • Starch nanoparticle sedimentation preparation method through treatment of starch water solution by adopting ultrasonic wave

Examples

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Effect test

Embodiment 1

[0018] Weigh 3g of cornstarch and disperse it in 100mL of water to form a cornstarch suspension; stir and gelatinize the cornstarch suspension in a boiling water bath for 60min to obtain an aqueous solution of cornstarch with a concentration of 3g / 100mL. The obtained cornstarch aqueous solution was treated at 40° C. with 100 W ultrasonic waves generated by an ultrasonic generator for 30 minutes to obtain a low-viscosity cornstarch aqueous solution. Add the obtained low-viscosity cornstarch aqueous solution dropwise to the ethanol in the ultrasonic vibration, the volume ratio of the cornstarch aqueous solution to the ethanol used is 1:5, continue ultrasonic oscillation for 3 minutes after the dropwise addition, complete the sedimentation, and obtain the suspension of cornstarch nanoparticles liquid. The obtained cornstarch nanoparticle suspension was centrifuged at 4000r / min for 5min, the supernatant was removed, and the precipitate was washed with alcohol and then freeze-dried...

Embodiment 2

[0020] On the basis of Example 1, when the concentration of the corn starch aqueous solution is 5 g / 100 mL, the average particle diameter of the finally obtained corn starch nanoparticles is 133.4 nm, and the PDI is 0.395. It can be seen that when the concentration of starch aqueous solution increases, the particle size of starch nanoparticles increases.

Embodiment 3

[0022] On the basis of Example 1, when the concentration of the cornstarch aqueous solution is 8g / 100mL, the average particle diameter of the finally obtained cornstarch nanoparticles is 229.6nm, and the PDI is 0.479. This example further verifies that when the concentration of starch aqueous solution increases, the particle size of starch nanoparticles increases.

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Abstract

The invention relates to a starch nanoparticle sedimentation preparation method through treatment of starch water solution by adopting ultrasonic waves and belongs to the technical field of nano materials. The production efficiency of the prior art is lower, the production cost is higher and the product quality is not high. The starch nanoparticle sedimentation preparation method through treatment of starch water solution by adopting ultrasonic waves is characterized in that the method comprises the steps of dispersing starch in water and performing gelatinization at 60 to 100 DEG C to obtain starch water solution, wherein the starch concentration is 1 to 8g / 100mL; treating the obtained starch water solution for 1 to 60min by using 100 to 600W ultrasonic waves generated by an ultrasonic generator to obtain low-viscosity starch water solution; dropping the obtained low-viscosity starch water solution in ethanol in ultrasonic oscillation, wherein the volume ratio of the starch water solution to the used ethanol is 1:(2-10), and continuously performing ultrasonic oscillation for 3 to 10min after dropping to complete sedimentation to obtain starch nanoparticle suspension; performing centrifugal separation to the obtained starch nanoparticle suspension, removing supernatant, washing sediments with ethanol, and then performing freeze-drying to obtain starch nanoparticles. The starch nanoparticle sedimentation preparation method through treatment of starch water solution by adopting ultrasonic waves is used for preparing various starch nanoparticles.

Description

technical field [0001] The invention relates to a method for preparing starch nanoparticle sedimentation by ultrasonic treatment of starch aqueous solution. The starch aqueous solution is ultrasonically treated, and then nanometer sedimentation is performed to finally obtain starch nanoparticle, which belongs to the technical field of nanomaterials. technical background [0002] Starch is a natural polymer substance with abundant reserves in nature. Native starch is also called native starch, which exists in the form of granules, and the size of starch granules ranges from 2 to 100 μm due to different crop varieties. Starch nanoparticles can be obtained by processing raw starch, and the so-called starch nanoparticles refer to aggregates of starch molecules with a size smaller than 1000 nm. Because starch is cheap, easy to obtain, non-toxic, degradable, and biocompatible, starch nanoparticles have very broad application prospects in many fields, such as being able to embed d...

Claims

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Application Information

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IPC IPC(8): C08J3/14C08J3/28
Inventor 周江常艳娇闫晓侠付友佳王倩任丽丽佟金
Owner JILIN UNIV
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