Method for preparing modified porous starch by using pulsed electric field

A technology of porous starch and pulsed electric field, applied in the fields of application, food electrical processing, food science, etc., can solve the problems that are not involved, and achieve the effect of reducing reaction time, good oil absorption performance, good embedding and protection

Active Publication Date: 2017-12-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese Invention Patent No. 200810028986.8 discloses a method for preparing amorphous granular starch by using a pulse electric field; Chinese Invention Patent No. 200910040201.3 discloses a method for strengthening low-temperature Maillard reaction by a pulse electric field to prepare a food oxidant that can improve the color of food; China Invention Patent 201410156150.1 discloses a method for preparing pollen nutrient solution with ultrasonic synergistic pulse electric field. First, pre-treat pollen magnesium sulfate solution with ultrasonic wave, and then post-process with pulse electric field to obtain pollen nutrient solution wi

Method used

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  • Method for preparing modified porous starch by using pulsed electric field
  • Method for preparing modified porous starch by using pulsed electric field
  • Method for preparing modified porous starch by using pulsed electric field

Examples

Experimental program
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Effect test

Embodiment 1

[0038](1) Prepare sweet potato raw starch and acetic acid buffer solution of pH 4.5 to form starch milk with a mass ratio concentration of 10%, and add 0.5% α-amylase (based on starch dry basis), and stir at a constant temperature and speed at 50°C Enzymolysis for 3h. Use 2 mol / L hydrochloric acid solution to adjust the pH of the system to 1-2 to terminate the reaction, wash the starch milk three times, dry in an oven at 50°C, and pulverize through a 200-mesh sieve to obtain the original porous starch.

[0039] (2) The porous sweet potato starch prepared in (1) and distilled water are configured into a suspension (1.0 kg in total) with a mass concentration of 40% (w / v), and after stirring for 60 min, add a few drops of 2mol / L potassium chloride The solution adjusts the conductivity of the starch milk to 1000 μS / cm. Adjust the flow rate of the constant current pump to 250mL / min to pump the mixed starch milk into the pulse electric field device (SY-50, Guangzhou Yunxing Scienti...

Embodiment 2

[0048] (1) Prepare ordinary corn raw starch and acetic acid buffer solution of pH 5.5 to form starch milk with a mass ratio concentration of 15%, and add 1% α-amylase (based on starch dry basis), at a constant temperature and constant speed at 50°C Stir for enzymatic hydrolysis for 6h. Use 2 mol / L hydrochloric acid solution to adjust the pH of the system to 1-2 to terminate the reaction, wash the starch milk 5 times, dry in an oven at 45°C, and pulverize through an 80-mesh sieve to obtain the original porous starch.

[0049] (2) The porous cornstarch prepared in step (1) and water are configured into a suspension (1.0 kg in total) with a mass concentration of 30% (w / v), and after stirring for 40 minutes, add a few drops of 1mol / L sodium chloride The solution adjusts the conductivity of the starch milk to 500 μS / cm. Adjust the constant flow pump flow rate to 150mL / min to pump the mixed starch milk into the pulse electric field device (SY-50, Guangzhou Yunxing Scientific Instru...

Embodiment 3

[0051] (1) Prepare common wheat raw starch and acetic acid buffer solution of pH 6.5 to form starch milk with a mass ratio concentration of 25%, and add 2% α-amylase (based on starch dry basis), at a constant temperature and constant speed at 50°C Stirring and enzymatic hydrolysis for 9h. Use 2mol / L hydrochloric acid solution to adjust the pH of the system to 1-2 to terminate the reaction, wash the starch milk 4 times, dry in an oven at 40-50°C, and pulverize through a 200-mesh sieve to obtain the original porous starch.

[0052] (2) The porous wheat starch prepared in step (1) and water are configured into a suspension (1.0 kg in total) with a mass concentration of 25% (w / v), and after stirring for 20 min, add a few drops of 0.5 mol / L chlorinated Potassium solution adjusted the conductivity of starch milk to 100 μS / cm. Adjust the constant flow pump flow rate to 100mL / min to pump the mixed starch milk into the pulse electric field device (SY-50, Guangzhou Yunxing Scientific I...

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Abstract

The invention discloses a preparation method of modified porous starch by using a pulsed electric field. The method comprises the following steps: preparing raw starch and an acetic acid buffer solution into starch milk, and carrying out enzymolysis to obtain porous starch; mixing the porous starch with water and blending a mixture into uniform starch milk; adding an electrolyte solution into the adjusted starch milk; pumping swelled starch milk into a pulsed electric field device for treating; collecting the treated starch milk, and carrying out suction filtration and drying; and crushing and sieving to obtain a finished product. According to the preparation method disclosed by the invention, the porous starch with high adsorbability, high transparency, high freeze-thaw stability and high mechanical properties is prepared by using the pulsed electric field under the condition that the temperature is lower than the pasting temperature of starch; the preparation period is short, and negative influences from addition of a large of chemical reagents and high-temperature heating are avoided; and the improvement rate of oil absorbency of the product is high, and transparency and freeze-thaw stability are effectively improved.

Description

technical field [0001] The invention relates to a method for preparing modified porous starch, in particular to a method for preparing porous starch with high-quality performance by using a pulse electric field to treat porous starch milk. Background technique [0002] Porous starch is a new type of environment-friendly natural porous material. The diameter of the pore structure is about 0.5-1.5 μm. Through scanning electron microscope observation, it can be seen that the surface of the starch granules is concave from the outside to the center. The maximum pore volume can reach half of the entire starch granule. Factors such as pore size, pore volume, and pore position play a decisive role in the quality of porous starch. Porous starch has many advantages such as wide source of raw materials, low cost, green environmental protection, large specific surface area, low bulk density and good adsorption performance, and is widely used in chemical industry, medicine and hygiene, f...

Claims

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Application Information

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IPC IPC(8): C08J9/36C08J9/00C08L3/02C12P19/14C12P19/04A23L29/30A23L5/30
CPCA23L5/30A23L29/30A23V2002/00C08J9/00C08J9/36C08J2303/02C12P19/04C12P19/14A23V2200/224A23V2250/5118A23V2300/12
Inventor 韩忠王金花成军虎曾新安
Owner SOUTH CHINA UNIV OF TECH
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