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Thymol-chitosan oligosaccharide compound, and preparation method and application thereof

A technology of thymol and chitosan oligosaccharide is applied in the fields of food science, preservation of food ingredients as anti-microbials, protection of fruits/vegetables with a protective layer, etc., to improve storage and preservation properties, bacteriostasis and antioxidant capacity. Effect

Pending Publication Date: 2020-10-16
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there is no report on the research on the combination of chitosan and thymol by TPP to form a complex. The present invention explores the ion cross-linking preparation method of the thymol-chitosan complex and characterizes its molecular structure, and evaluates the complex’s resistance Oxidation and antibacterial activity, and apply it to the storage experiment of Nanguo pear, providing a new way for the storage and preservation of fruits and vegetables

Method used

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  • Thymol-chitosan oligosaccharide compound, and preparation method and application thereof
  • Thymol-chitosan oligosaccharide compound, and preparation method and application thereof
  • Thymol-chitosan oligosaccharide compound, and preparation method and application thereof

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Embodiment 1

[0032] Embodiment 1: a thymol-chitooligosaccharide complex, comprising sodium tripolyphosphate (crosslinking agent), thymol and chitooligosaccharide, wherein the mass ratio of thymol to chitooligosaccharide is 1:2. The preparation method is as follows:

[0033] (1) Using sodium tripolyphosphate, thymol, chitosan oligosaccharide (molecular weight 1500Da) as raw materials;

[0034] (2) Use 1% acetic acid solution as a solvent to prepare a 1 mg / mL thymol solution, add 40 mg of chitosan oligosaccharide to the 20 mL thymol solution and stir evenly;

[0035] (3) Prepare 20mL of 1mg / mL sodium tripolyphosphate solution, drop the sodium tripolyphosphate solution into the mixed solution of thymol and chitosan oligosaccharide;

[0036] (4) After reacting for 2 hours, centrifuge at 10,000 r / min for 20 minutes to collect the complex, use a 500 Da dialysis bag to remove free polyphenols, and freeze-dry to obtain the finished product, namely the thymol-chitooligosaccharide complex;

[0037...

Embodiment 2

[0038] Embodiment 2: Embodiment 2 is similar to Embodiment 1, the only difference is that the mass ratio of thymol and chitosan oligosaccharide is 1:5.

Embodiment 3

[0039] Embodiment 3: Embodiment 2 is similar to embodiment 1, and difference only is, wherein the mass ratio of thymol and chitosan oligosaccharide is 1:8.

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Abstract

The invention belongs to the field of food, and particularly relates to a thymol-chitosan oligosaccharide compound, and a preparation method and application thereof. The thymol-chitosan oligosaccharide compound is a compound formed by crosslinking chitosan oligosaccharide and thymol by using an ionic crosslinking method. The thymol and the chitosan oligosaccharide are used as raw materials; according to the activity and structure characteristics of the thymol and the chitosan oligosaccharide, the thymol-chitosan oligosaccharide compound is prepared by the ionic crosslinking method; the condition that the antibacterial performance and the oxidation resistance of the compound are obviously improved is discovered; through observation by a scanning electron microscope, the condition that the thymol-chitosan oligosaccharide compound is of a spherical or blocky structure is discovered; and by analyzing the molecular structure of the compound through infrared and nuclear magnetic resonance, the conditions that thymol molecules enter hydrophobic cavities formed by the chitosan oligosaccharide and TPP through the charge effect, and the stability of the molecular structure is maintained by using hydrophobic interaction and electrostatic force between molecules are discovered. When the compound is prepared into a coating film to be sprayed on the surface of Nanguo pears, storage experiments prove that the thymol-chitosan oligosaccharide compound can obviously improve the storage and fresh-keeping properties of the Nanguo pears.

Description

technical field [0001] The invention belongs to the field of food, and in particular relates to a thymol-chitooligosaccharide complex and a preparation method and application thereof. Background technique [0002] Thymol belongs to monophenylphenol, widely exists in Thyme plants, has antibacterial, anti-oxidation, anti-inflammation, and wound healing effects, and is widely used in the fields of medicine and food. Oligochitosan is degraded from chitosan, the only positively charged basic amino polysaccharide among natural sugars. Its solubility and absorbability are superior to chitosan, and it has anti-oxidation, immunity-enhancing, antibacterial and anti-tumor properties. and other biological activities. Studies have shown that through the interaction between polyphenols and oligosaccharides, the biological activities of polyphenols such as antioxidant, hypoglycemic, and anticoagulant can be enhanced, and the bioavailability of polyphenols can be affected, and food flavor ...

Claims

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Application Information

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IPC IPC(8): A23B7/16
CPCA23B7/16A23V2002/00A23V2200/22A23V2200/02A23V2200/10
Inventor 曹汝鸽于洋马乾伟周中凯
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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