Method for producing porous starch and its application

A technology of porous starch and production method, applied in the field of biological modified starch, can solve the problems of unoptimistic application prospect, limited adsorption capacity, incapable of industrialized production, etc., and achieve the effects of superior adsorption performance, huge application potential, and reduced preparation cost.

Inactive Publication Date: 2004-11-17
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among the above methods, ultrasonic treatment, alcohol denaturation, and mechanical impact methods are currently unable to be industrialized; and the spray method is a solid terminal polymer formed by mixing pure starch with gelatin, etc., and then spraying. The adsorption only occurs in In the pits on the surface, the adsorption capacity is limited, and the application prospect is not optimistic; the most practical value is the enzymatic hydrolysis method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 1kg of indica rice starch to 1-2L of 0.2mol / L Na with a pH of about 4 2 HPO 4 -0.1mol / L citric acid buffer solution, and keep stirring, then add 0.05kg glucoamylase and 0.05kg α-amylase, keep stirring at a constant temperature of 40°C for 24h. Centrifuge to separate the supernatant from the precipitate, wash the precipitate with water, and centrifuge again until the supernatant is neutral. The precipitate is dried by hot air to obtain a porous starch product.

[0034] The supernatant after the reaction is decolorized (by adding 2% activated carbon), concentrated (vacuum degree 0.01Mpa, 80° C.), and glucose syrup with a solid content of ≥80% can be obtained.

Embodiment 2

[0036] Add 1kg of cornstarch to 1-2L of 0.2mol / L Na with a pH of around 4 2 HPO 4 -0.1mol / L citric acid buffer solution, and keep stirring, then add 0.05kg glucoamylase and 0.05kg α-amylase, keep stirring at a constant temperature of 40°C for 20h. Centrifuge to separate the supernatant from the precipitate, wash the precipitate with water, and centrifuge again until the supernatant is neutral. The precipitate is dried by hot air to obtain a porous starch product.

[0037] The supernatant after the reaction is decolorized (by adding 2% activated carbon), concentrated (vacuum degree 0.01Mpa, 80° C.), and glucose syrup with a solid content of ≥80% can be obtained.

Embodiment 3

[0039] Add 1kg of tapioca starch to 1-2L of 0.2mol / L Na with a pH of about 4 2 HPO 4 -0.1mol / L citric acid buffer solution, and keep stirring, then add 0.05kg glucoamylase and 0.05kg α-amylase, keep stirring at a constant temperature of 40°C for 24h. Centrifuge to separate the supernatant from the precipitate, wash the precipitate with water, and centrifuge again until the supernatant is neutral. The precipitate is dried by hot air to obtain a porous starch product.

[0040] The supernatant after the reaction is decolorized (by adding 2% activated carbon), concentrated (vacuum degree 0.01Mpa, 80° C.), and glucose syrup with a solid content of ≥80% can be obtained.

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Abstract

The invention discloses a method for producing porous starch and its application by using starch, maize starch, tapioca starch, sweet potato starch and potato starch as raw material, and charging complex enzyme of saccharified enzymes and alpha-amylase possessing raw starch hydrolysis vitality under the temperature lower than gelatinization temperature, agitating continuously, reacting for a finite period of time at constant temperature, and obtaining porous starch product through centrifuging, scrubbing and drying.

Description

technical field [0001] The invention relates to a method for producing porous starch from raw starch by using biotechnology, and uses the porous starch as an adsorbent to absorb various bioactive substances to protect and slowly release target objects, belonging to the field of biomodified starch. Background technique [0002] Porous starch is a raw starch granule with a hollow structure similar to a hornet's honeycomb, which is a product obtained by hydrolyzing biologically active enzymes at a temperature lower than the gelatinization temperature of starch. Because it is a hollow structure, it has a large adsorption capacity; and it is a natural organic substance, which can be used as a natural organic adsorbent. [0003] Porous starch is mainly obtained by the following methods: physical methods, such as ultrasonic treatment, mechanical impact, spray, alcohol denaturation; biological methods, such as enzymatic hydrolysis. [0004] Among the above methods, ultrasonic treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/00
Inventor 姚卫蓉姚惠源
Owner JIANGNAN UNIV
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