Preparation method of starch microspheres with small particle sizes

A technology of starch microspheres and small particle size, which is applied in the field of preparation of small particle size starch microspheres, and can solve problems such as poor product quality, no small particle size starch microspheres, uneven distribution, etc.

Active Publication Date: 2017-06-30
GUANGXI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the existing reports, the average particle size of starch microspheres prepared by the aqueous two-phase emulsion method is large and the distribution is uneven, and there is no report on the preparation of small-size starch microspheres by the aqueous two-phase emulsion method.
The applicant found in the preliminary research that, if drawing lessons fro...

Method used

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  • Preparation method of starch microspheres with small particle sizes
  • Preparation method of starch microspheres with small particle sizes
  • Preparation method of starch microspheres with small particle sizes

Examples

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Embodiment 1

[0033] A preparation method of small-diameter starch microspheres includes the following steps:

[0034] (1) Preparation of starch solution: The modified starch obtained after acid treatment of soluble potato starch is formulated into a suspension with a mass fraction of 17.5%, and heated in a boiling water bath to gelatinize for 15 minutes to obtain a starch solution;

[0035] (2) Preparation of polyvinylpyrrolidone solution: polyvinylpyrrolidone with a weight average molecular weight of 24000 and deionized water are prepared into a polyvinylpyrrolidone solution with a mass fraction of 38%;

[0036] (3) Emulsion emulsification: In terms of parts by volume, pour 1 part of starch solution that has been cooled to 55°C into 10 parts of polyvinylpyrrolidone solution at 55°C, and then use a high-shear emulsifier at a speed of 6000 rpm Emulsify for 30 seconds to obtain an aqueous two-phase emulsion;

[0037] (4) Regenerate and solidify into balls and separate and wash: Place the two-phase e...

Embodiment 2

[0043] A preparation method of small-diameter starch microspheres includes the following steps:

[0044] (1) Preparation of starch solution: The modified starch obtained after acid treatment of soluble corn starch is formulated into a suspension with a mass fraction of 17.5%, and heated in a boiling water bath to gelatinize for 15 minutes to obtain a starch solution;

[0045] (2) Preparation of polyvinylpyrrolidone solution: prepare polyvinylpyrrolidone with a weight average molecular weight of 10,000 and deionized water into a polyvinylpyrrolidone solution with a mass fraction of 45%;

[0046] (3) Emulsion emulsification: In terms of parts by volume, pour 1 part of starch solution that has been cooled to 55°C into 10 parts of polyvinylpyrrolidone solution at 55°C, and then use a high-shear emulsifier at a speed of 8000 rpm Emulsify for 10 seconds to obtain an aqueous two-phase emulsion;

[0047] (4) Regenerate and solidify into balls and separate and wash: Place the two-phase emulsio...

Embodiment 3

[0053] A preparation method of small-diameter starch microspheres includes the following steps:

[0054] (1) Preparation of starch solution: The modified starch obtained after acid treatment of soluble tapioca starch is formulated into a suspension with a mass fraction of 10%, and heated in a boiling water bath to gelatinize for 15 minutes to obtain a starch solution;

[0055] (2) Preparation of polyvinylpyrrolidone solution: polyvinylpyrrolidone with a weight average molecular weight of 24000 and deionized water are prepared into a polyvinylpyrrolidone solution with a mass fraction of 35%;

[0056] (3) Emulsion emulsification: In terms of parts by volume, pour 1 part of starch solution that has been cooled to 55°C into 8 parts of polyvinylpyrrolidone solution at 55°C, and then use a high-shear emulsifier at a speed of 10,000 rpm Emulsify for 20 seconds to obtain an aqueous two-phase emulsion;

[0057] (4) Regenerate and solidify into balls and separate and wash: Place the two-phase e...

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Abstract

The invention discloses a preparation method of starch microspheres with small particle sizes. The preparation method comprises steps as follows: (1) preparation of a starch solution; (2) preparation of a polyvinylpyrrolidone solution; (3) forming of an aqueous two-phase emulsion through high-speed shearing and emulsification performed after the polyvinylpyrrolidone solution is added to the starch solution; (4) balling through retrogradation and solidification, separation and washing: the emulsified aqueous two-phase emulsion is put in an environment at the temperature of 4-30 DEG C to be retrograded for 24 h, then taken out and subjected to centrifugal separation for 10-15 min, a substrate in a centrifuge tube is washed and then dried for 12 h, and the starch microspheres with the average particle sizes smaller than 10 mu m are obtained. The prepared starch microspheres have the characteristic of being small in particle size, the phenomenon that starch microspheres aggregate due to the fact that the interfacial area between the two phases of the aqueous two-phase emulsion is substantially increased, the interfacial free energy is substantially increased and liquid drops aggregate to reduce the interfacial free energy in the preparation process of the starch microspheres can be avoided, and the preparation method has great application value.

Description

[0001] 【Technical Field】 [0002] The invention relates to the field of preparation of starch microspheres, in particular to a method for preparing small-diameter starch microspheres. [0003] 【Background technique】 [0004] Macromolecular microspheres refer to macromolecular materials with a particle size in the micron or sub-micron range and a spherical or quasi-spherical shape. In recent years, the research and application of polymer microspheres have developed rapidly, and have entered various fields of social life, from high value-added products such as drug carriers and chromatography media to bulk products such as coatings, paper surface coatings, and cosmetics. All polymer microspheres are used. Particle size is one of the important indicators of polymer microspheres. According to the particle size, they can be divided into small particle size microspheres (particle size <20μm) and large particle size microspheres (particle size ≥20μm). The particle size directly affects...

Claims

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Application Information

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IPC IPC(8): B01J13/06
CPCB01J13/06
Inventor 冼学权李秉正杨辉黎演明杜芳黎陈东
Owner GUANGXI ACAD OF SCI
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