Method for preparing sulfated water-soluble dietary fiber employing extrusion

A technology of dietary fiber and sulfation, which is applied in the field of food processing, can solve the problem of no sulfation of dietary fiber, and achieve the effect of reducing the possibility and increasing the content

Active Publication Date: 2015-03-25
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent with the publication number CN 102558371A discloses a method for preparing starch dodecenyl succinate by extrusion, but there is no report on the preparation of sulfated dietary fiber by extrusion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 100g of crushed apple pomace that has passed through a 20-mesh sieve, add distilled water according to a solid-liquid ratio (g / mL) of 1:8, adjust the pH to 13.0 with 2mol / L sodium hydroxide aqueous solution, add 2% hydrogen peroxide by distilled water volume, 70 Insulate at ℃ for 2 hours, then pass through a 100-mesh sieve, wash with water on the sieve until neutral, dry in an oven at 60°C, crush and pass through a 40-mesh sieve to obtain apple dietary fiber;

[0022] Extrusion esterification reaction: take 30g of apple dietary fiber, add 9mL of saturated aqueous solution of sulfamic acid (containing 1.31g of sulfamic acid), stir well, then add 6mL of concentrated sulfuric acid (11.04g 98% concentrated sulfuric acid), stir well and then static Place the sample for 1 hour; adjust the screw speed at 750r / min, put the sample into the extruder and extrude it. After the extrusion is completed, dry the extrudate at 50°C and cool it at room temperature to obtain the modif...

Embodiment 2

[0025] Weigh 100g of crushed apple pomace that has passed through a 40-mesh sieve, add distilled water according to a solid-liquid ratio (g / mL) of 1:8, adjust the pH to 13.0 with 3mol / L aqueous sodium hydroxide solution, add 2% hydrogen peroxide by volume of distilled water, 70 Insulate at ℃ for 2 hours, then pass through a 100-mesh sieve, wash with water on the sieve until neutral, dry in an oven at 50°C, crush and pass through a 60-mesh sieve to obtain apple dietary fiber;

[0026] Extrusion esterification reaction: take 30g of apple dietary fiber, add 12mL of saturated aqueous solution of sulfamic acid (containing 1.75g ​​of sulfamic acid), stir well, then add 15mL of concentrated sulfuric acid (27.6g 98% concentrated sulfuric acid), stir well and then static Place the sample for 1 hour; adjust the screw speed at 650r / min, put the sample into the extruder and extrude it. After the extrusion is completed, dry the extrudate at 50°C and cool it at room temperature to obtain the...

Embodiment 3

[0029] Weigh 200g of crushed apple pomace through a 40-mesh sieve, add distilled water according to a solid-liquid ratio (g / mL) of 1:8, adjust the pH to 13.0 with 4mol / L sodium hydroxide aqueous solution, add 2% hydrogen peroxide by distilled water volume, 70 Insulate at ℃ for 2 hours, then pass through a 100-mesh sieve, wash with water on the sieve until neutral, dry in an oven at 50°C, crush and pass through a 40-mesh sieve to obtain apple dietary fiber;

[0030] Extrusion esterification reaction: take 50g of apple dietary fiber, add 15mL of saturated aqueous solution of sulfamic acid (containing 2.19g of sulfamic acid), stir well, then add 15mL of concentrated sulfuric acid (27.6g of 98% concentrated sulfuric acid), stir well Stand still for 1 hour to obtain the sample; adjust the screw speed at 450r / min, put the sample into the extruder for extrusion, after the extrusion is completed, dry the extrudate at 50°C, and cool it at room temperature to obtain the modified apple me...

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PUM

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Abstract

The invention discloses a method for preparing a sulfated water-soluble dietary fiber employing extrusion. The method comprises the following steps: (1) with an apple dietary fiber as a raw material, adding a sulfating agent by virtue of a screw extruder, and carrying out extruding esterification reaction, so as to obtain modified apple dietary fiber; and (2) carrying out water extract and alcohol precipitation, and dialysis and purification to obtain the sulfated water-soluble dietary fiber. The method disclosed by the invention has the advantages that great use of an organic solvent is avoided; and the sulfated product is safe, and simple in technological process. The sulfated water-soluble dietary fiber is prepared by virtue of a dry heating method of the screw extruder; the substitution degree of esterification of the prepared product is 0.51-0.79; and the sulfated water-soluble dietary fiber has good oxidation resistance, antiviral property and antitumor activity.

Description

technical field [0001] The invention belongs to the technical field of food processing, and relates to a preparation method of sulfated dietary fiber under the condition of avoiding the use of a large amount of organic solvents. Background technique [0002] my country is a big apple producing country, and a large amount of apple pomace will be produced in the process of fruit juice processing. According to reports, the dietary fiber in apple pomace is as high as 60-80%, which is a good raw material for preparing dietary fiber. Dietary fiber is defined as a polysaccharide polymer composed of ten or more monosaccharides, which is not digested and absorbed by human endogenous digestive enzymes, and partially or fully fermented in the human large intestine. Structurally speaking, dietary fiber is a macromolecular organic compound and its derivatives composed of monosaccharides (glucose, galactose, mannose, and arabinose, etc.) as basic units, and there are a large number of hy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L1/308A23L1/212A23L33/22
Inventor 陈雪峰邱尹琬刘宁徐瑶
Owner SHAANXI UNIV OF SCI & TECH
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