A kind of cross-linked starch with high resistant starch content and preparation method thereof

Abstract

The invention discloses a crosslinked starch with a high content of resistant starch and a preparation method thereof. The crosslinked starch with high content of resistant starch is characterized inthat the content of resistant starch is greater than 80%, the substitution degree is greater than 1.57*10<-4>, and the reaction efficiency is greater than 70%. The crosslinked starch with the high content of resistant starch is prepared by the steps of preparing of starch milk, crosslinking reaction in a microwave synthesis reaction working station, centrifuging, suction filtering, washing, drying, crushing, screening and the like. The crosslinked starch has the advantages that the content of resistant starch is greater than 80%, the substitution degree is greater than 1.57*10<-4>, and the reaction efficiency is greater than 70%; by increasing the high content of resistant starch, the health-care function of the crosslinked starch is obviously enhanced.

Description

Technical field

[0001] The invention belongs to the technical field of modified starch, and in particular relates to a cross-linked starch with high content of resistant starch and a preparation method thereof.

Background technique

[0002] Resistant starch (Resistant Starch, RS) is a kind of starch and starch degradation products that cannot be digested in the small intestine of healthy humans, but can be fermented or partially fermented in the large intestine. The digestive properties of resistant starch endow it with a variety of important physiological functions. According to research, resistant starch is fermented and metabolized by microorganisms in the large intestine to produce some short-chain fatty acids, which contribute to the prevention and treatment of colon cancer; can effectively reduce cholesterol, It is beneficial to weight control; it can better regulate the blood sugar index, so it is beneficial to the prevention and treatment of diabetes. According ...

Examples

Embodiment 1

[0022] Accurately take by weighing 25g potato starch (dry basis) and mix with double distilled water, the starch emulsion A that preparation obtains concentration is 40%, with 12% sodium tripolyphosphate-sodium trimetaphosphate (sodium tripolyphosphate: sodium trimetaphosphate =20:80) composite cross-linking agent and 10% anhydrous sodium sulfate were added to the starch milk, and the amount added was based on starch dry basis to obtain starch emulsion B. Adjust the pH of the starch emulsion B system to 9, stir evenly, and place in microwave In the synthesis reaction workstation, the reaction was carried out at 45°C for 2 minutes, and the power was set to 450W. During the microwave reaction, magnetic stirring was carried out at the same time to ensure the uniformity of heating. After the microwave reaction, adjust the pH of the starch emulsion to 6.0 with 1mol / L HCl solution to terminate the crosslinking reaction, then centrifuge under a centrifuge at 3000r / min, filter with suc...

Embodiment 2

[0024] Accurately take by weighing 25g potato starch (dry basis) and mix with double distilled water, prepare the starch emulsion that concentration is 40%, with 10% sodium tripolyphosphate-sodium trimetaphosphate (sodium tripolyphosphate: sodium trimetaphosphate =20:80) composite cross-linking agent and 10% anhydrous sodium sulfate were added to the starch milk, and the amount added was based on starch dry basis to obtain starch emulsion B. Adjust the pH of the starch emulsion B system to 10, stir evenly, and place in microwave In the synthesis reaction workstation, react at 50°C for 1.8min, and set the power to 500W. During the microwave reaction, magnetic stirring is carried out at the same time to ensure the uniformity of heating. After the microwave reaction, adjust the pH of the starch emulsion to 6.2 with 1mol / L HCl solution to terminate the crosslinking reaction, then centrifuge under a centrifuge at 3000r / min, filter with suction, wash, dry, pulverize, and sieve to pre...

Embodiment 3

[0026] Accurately take by weighing 25g potato starch (dry basis) and mix with double distilled water, prepare the starch emulsion that concentration is 30%, with 10% sodium tripolyphosphate-sodium trimetaphosphate (sodium tripolyphosphate: sodium trimetaphosphate =10:90) composite cross-linking agent and 10% anhydrous sodium sulfate were added to the starch emulsion, and the amount added was based on starch dry basis to obtain starch emulsion B. Adjust the pH of starch emulsion B system to 11, stir evenly, and place in microwave In the synthesis reaction workstation, react at 50°C for 1.2min, and set the power to 500W. During the microwave reaction, magnetic stirring is carried out at the same time to ensure the uniformity of heating. After the microwave reaction, adjust the pH of the starch emulsion to 6.5 with 1mol / L HCl solution to terminate the crosslinking reaction, then centrifuge under a centrifuge at 3000r / min, filter with suction, wash, dry, pulverize, and sieve to pre...

Technical field

[0001] The invention belongs to the technical field of modified starch, and in particular relates to a cross-linked starch with high content of resistant starch and a preparation method thereof.

Background technique

[0002] Resistant starch (Resistant Starch, RS) is a kind of starch and starch degradation products that cannot be digested in the small intestine of healthy humans, but can be fermented or partially fermented in the large intestine. The digestive properties of resistant starch endow it with a variety of important physiological functions. According to research, resistant starch is fermented and metabolized by microorganisms in the large intestine to produce some short-chain fatty acids, which contribute to the prevention and treatment of colon cancer; can effectively reduce cholesterol, It is beneficial to weight control; it can better regulate the blood sugar index, so it is beneficial to the prevention and treatment of diabetes. According ...

Examples

Embodiment 1

[0022] Accurately take by weighing 25g potato starch (dry basis) and mix with double distilled water, the starch emulsion A that preparation obtains concentration is 40%, with 12% sodium tripolyphosphate-sodium trimetaphosphate (sodium tripolyphosphate: sodium trimetaphosphate =20:80) composite cross-linking agent and 10% anhydrous sodium sulfate were added to the starch milk, and the amount added was based on starch dry basis to obtain starch emulsion B. Adjust the pH of the starch emulsion B system to 9, stir evenly, and place in microwave In the synthesis reaction workstation, the reaction was carried out at 45°C for 2 minutes, and the power was set to 450W. During the microwave reaction, magnetic stirring was carried out at the same time to ensure the uniformity of heating. After the microwave reaction, adjust the pH of the starch emulsion to 6.0 with 1mol / L HCl solution to terminate the crosslinking reaction, then centrifuge under a centrifuge at 3000r / min, filter with suc...

Embodiment 2

[0024] Accurately take by weighing 25g potato starch (dry basis) and mix with double distilled water, prepare the starch emulsion that concentration is 40%, with 10% sodium tripolyphosphate-sodium trimetaphosphate (sodium tripolyphosphate: sodium trimetaphosphate =20:80) composite cross-linking agent and 10% anhydrous sodium sulfate were added to the starch milk, and the amount added was based on starch dry basis to obtain starch emulsion B. Adjust the pH of the starch emulsion B system to 10, stir evenly, and place in microwave In the synthesis reaction workstation, react at 50°C for 1.8min, and set the power to 500W. During the microwave reaction, magnetic stirring is carried out at the same time to ensure the uniformity of heating. After the microwave reaction, adjust the pH of the starch emulsion to 6.2 with 1mol / L HCl solution to terminate the crosslinking reaction, then centrifuge under a centrifuge at 3000r / min, filter with suction, wash, dry, pulverize, and sieve to pre...

Embodiment 3

[0026] Accurately take by weighing 25g potato starch (dry basis) and mix with double distilled water, prepare the starch emulsion that concentration is 30%, with 10% sodium tripolyphosphate-sodium trimetaphosphate (sodium tripolyphosphate: sodium trimetaphosphate =10:90) composite cross-linking agent and 10% anhydrous sodium sulfate were added to the starch emulsion, and the amount added was based on starch dry basis to obtain starch emulsion B. Adjust the pH of starch emulsion B system to 11, stir evenly, and place in microwave In the synthesis reaction workstation, react at 50°C for 1.2min, and set the power to 500W. During the microwave reaction, magnetic stirring is carried out at the same time to ensure the uniformity of heating. After the microwave reaction, adjust the pH of the starch emulsion to 6.5 with 1mol / L HCl solution to terminate the crosslinking reaction, then centrifuge under a centrifuge at 3000r / min, filter with suction, wash, dry, pulverize, and sieve to pre...

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