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Polysaccharide metal complex resin with function of hydrolyzing protein

A technology of metal complexes and protein hydrolysis, which is applied in the fields of polymer materials and food industry, can solve the problems of waste of resources, increase of filtration costs, unfavorable nutrition of wine products, etc., and achieve the effect of low cost and wide sources

Inactive Publication Date: 2011-02-16
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, polyvinylpyrrolidone (PVPP) and diatomite combined treatment method is often used for the removal of polyphenols and proteins in wine products. Although this method has been used for many years and has become a classic pretreatment method, due to PVPP and diatomite It is in the form of powder and is used for one-time use when processing wine, which not only increases the cost of filtration, but also diatomaceous earth is non-renewable and absorbs a large amount of wine, resulting in a lot of waste of resources
In addition, protein is an essential nutrient, and filtering it out is not good for the nutrition of the wine.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0011] Example 1: Dissolve 5.0g of chitosan powder in 100ml of 1.0% acetic acid solution, add 1.0ml of Span 80 solution under constant stirring at 40°C, add 15ml of polyethylene glycol, and react for 60min; adjust the temperature to 65°C, Add 10ml of formaldehyde and react for 30min; adjust the temperature to 75°C, add 10ml of epichlorohydrin and adjust the pH value to 8.0, react for 3 hours, filter under reduced pressure, wash with petroleum ether and absolute ethanol, and rinse with pure water To obtain chitosan microsphere resin. Take 8.0g of chitosan resin, add 20ml of dimethylformamide solution with a carbon nitrogen heterocycle concentration of 1.0%, activate the resin with constant temperature oscillation at 40°C for 5 hours, remove the remaining organic solvent by suction, add 50ml of copper ion solution, the concentration 0.1 mol / L, coupling at 20°C for 7 hours, suction under reduced pressure, and drying to obtain the modified chitosan metal ion complex resin.

example 2

[0012] Example 2: Dissolve chitosan powder 5.0 in 150ml, 1.0% acetic acid solution, add 1.0ml of Span 80 solution under constant stirring at 40°C, add polyethylene glycol 35ml, react for 60min; adjust temperature to 80°C, add formaldehyde 10ml, react for 30min; adjust the temperature to 75°C, add 30ml of epichlorohydrin and adjust the pH value to 8.0, continue to react for 3 hours, filter under reduced pressure, wash with petroleum ether, acetone, and water respectively, and obtain the shell after several times Glycan Microsphere Resin. Take 8.0 g of chitosan resin, add 15.0 ml of dimethylformamide solution with a carbon nitrogen heterocycle concentration of 3.0%, activate the resin with constant temperature oscillation at 80°C for 8 hours, remove the carbon and nitrogen heterocycles by suction, and then add 75 ml of an aqueous solution of calcium ion solution , with a concentration of 0.3 mol / L, coupling at 30°C for 9 hours under reduced pressure and suction, washing with wat...

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PUM

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Abstract

The invention relates to a technology for preparing a polysaccharide metal complex resin with a function of hydrolyzing the protein, belonging to the field of high polymer material and food engineering. The technology comprises the following steps of: modifying a space framework structure provided by chitosan resin by using a carbon and nitrogen heterocyclic compound and then coupling specific metal ions to obtain polysaccharide metal complex resin with a function of hydrolyzing the protein. the resin is easy to prepare, can be recycled and has favorable mechanical performance and reusability; and the resin is superior to the traditional diatomite clearing method when applied ro the wine production, can decompose the protein, prevent the precipitation of the wine caused by the protein and effectively prolong the shelf life of the wine while increasing the content of the amino acid in the wine. the resin can be applied to the field associated with the food production.

Description

technical field [0001] The invention relates to a preparation method of a polysaccharide metal complex resin with the function of hydrolyzing protein, belonging to the fields of polymer materials and food industry. Background technique [0002] Chitosan (Chitosan) is the only alkaline polysaccharide that exists in nature, and it is the product of chitin (Chitin) hydrolyzed and deacetylated under alkaline conditions. In the biological world, the annual synthesis of chitin is 10 billion tons, which is the second largest organic resource on the earth except cellulose. Therefore, chitosan is a biological resource with a wide range of sources and low cost. There are a large number of hydroxyl groups and amino groups on chitosan molecules, which are easy to be chemically modified. By coordinating with different types of metal ions, chitosan metal complexes with special functions can be prepared. [0003] In the food industry, especially in the processing of fruit wine and beer, t...

Claims

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Application Information

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IPC IPC(8): C12H1/056C08B37/08
Inventor 汪东风王星宇徐莹齐宏涛
Owner OCEAN UNIV OF CHINA