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A kind of chitosan oligosaccharide graft copolymer g1.0 and its preparation method and application

A graft copolymer, chitosan oligosaccharide technology, applied in the field of food chemistry, can solve the problems of limited application, poor water solubility of chitosan, limited bacteriostatic ability, etc., and achieves mild experimental conditions, strong bacteriostatic ability, and fast degradation speed. Effect

Active Publication Date: 2021-06-01
ZHEJIANG GONGSHANG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The research and application of chitosan and its derivatives in antibacterial aspects has become a hot spot today, but due to the poor water solubility and limited antibacterial ability of chitosan, its application in the actual production process is greatly limited.

Method used

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  • A kind of chitosan oligosaccharide graft copolymer g1.0 and its preparation method and application
  • A kind of chitosan oligosaccharide graft copolymer g1.0 and its preparation method and application
  • A kind of chitosan oligosaccharide graft copolymer g1.0 and its preparation method and application

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Experimental program
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Embodiment Construction

[0038] The present invention will be further described below in conjunction with specific examples, but the present invention is not limited to the following examples.

[0039] 1 Preparation of chitosan oligosaccharide

[0040] 1.1.1 Experimental materials and reagents

[0041] Table 2-1 Main materials and reagents

[0042]

[0043]

[0044] 2.1.2 Experimental instruments and equipment

[0045] Table 2-2 Main instruments and equipment

[0046]

[0047] 1.2.1 Preparation of Chitooligosaccharides by Step-by-Step Degradation of Chitosan

[0048] 1.2.1.1 Microwave / ultrasonic / UV assisted H2O2 rapid viscosity reduction

[0049] Accurately weigh 3g of chitosan and make it fully dissolved in 100mL of specific concentration (v / v) acetic acid solution by high-speed stirring, then transfer the solution to a 250mL quartz three-necked bottle, add a certain amount of 30%H 2 o 2 , correctly installed in the cavity of the microwave synthesizer, pay attention to make sure that t...

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Abstract

The invention discloses a chitosan oligosaccharide graft copolymer G1.0 as well as its preparation method and application. The present invention adopts the grafting method initiated by free radicals, adopts the method of combining physical, chemical, and enzymatic hydrolysis to degrade chitosan to prepare chitosan oligosaccharides, and then uses chitosan oligosaccharides as raw materials to initiate chitosan oligosaccharides by cerium ammonium nitrate. The active group of the sugar molecule undergoes a free radical reaction to graft methyl acrylate for branching modification, and then uses the divergent method to perform Michael addition reaction on the prepared chitosan oligosaccharide, grafting ethylenediamine to prepare a graft copolymer G1.0. The invention provides a chitosan oligosaccharide graft copolymer with good water solubility and stronger antibacterial ability. The invention provides a preparation method of chitosan oligosaccharide graft copolymer of the invention. The chitosan graft copolymer of the invention has the advantages of good water solubility and strong antibacterial ability, and can be used as a food antiseptic and antibacterial agent.

Description

technical field [0001] The invention belongs to the field of food chemistry and relates to a bacteriostatic agent in food chemistry, in particular to a chitosan oligosaccharide graft copolymer and its preparation method and application. Background technique [0002] Chitosan (Chitosan) is a polysaccharide product with a deacetylation degree of chitin (Chitin) reaching more than 55%. Natural alkaline polysaccharides [1]. Chitin is the second largest natural polysaccharide resource in nature with annual biosynthesis (up to 1010 tons / year) of vitamins [2; 3], and its chemical structural unit is N- Acetyl-2-amino-2-deoxy-D-glucose binary linear macromolecular polymer[4], mainly exists in the shell and inner cuticle of marine invertebrates such as shrimp, crab and crustaceans, fungi (yeast , mold, mushroom, etc.), algae and higher plant cell walls [5]. Although the sources of chitin are widely used and inexhaustible, due to intramolecular or intermolecular adjacent two sugar u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/32C08F251/00C08F220/14A23L3/3562C12P19/26C12P19/14
CPCA23L3/3562C08F8/32C08F251/00C12P19/14C12P19/26C08F220/14
Inventor 熊春华杨雄阎亚利王小青陈青方嫱叶鑫妍
Owner ZHEJIANG GONGSHANG UNIVERSITY
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