Preparation method and application of selenium nanoparticles with stable phenolic ester modified chitosan molecules

Through the combination of the stable selenium nanoparticles of phenolic modified chitosan and blue light irradiation, the nutritional loss and health risks in traditional food sterilization technology are solved, and efficient and safe food sterilization and preservation effects are achieved.

CN119732396APending Publication Date: 2025-04-01ZHEJIANG GONGSHANG UNIVERSITY
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Patent Information

Application Number
CN202411915784.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-24
Publication Date
2025-04-01

AI Technical Summary

Technical Problem

Traditional food sterilization technology has nutritional loss, sensory quality decline and health risks. The high-energy consumption sterilization process is complex to operate, making it difficult to meet the needs of food safety and quality protection.

Method used

The active phenolic fat modified chitosan stable selenium nanoparticles were covalently crosslinked onto natural chitosan molecules by green radical-induced crosslinking method, and selenium nanoparticles with positively charged and amphiphilic characteristics were prepared, and combined with blue light irradiation, achieving efficient and safe bactericidal effect.

Benefits of technology

It significantly improves the stability and bactericidal activity of nanoselenium, can effectively sterilize at low concentrations, quickly generate a large amount of ROS, achieve efficient and safe bactericidal effect, and is suitable for food safety, preservation, medical treatment and other fields.

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Abstract

The invention discloses a preparation method and application of phenolic ester modified chitosan molecule stable selenium nanoparticles (PC and SeNPs), the modification method comprises the following steps: (1) taking modified chitosan, sodium selenite and ascorbic acid as raw materials, and preparing the modified chitosan stable selenium nanoparticles through green oxidation-reduction reaction; wherein the modified chitosan is prepared by covalently cross-linking multifunctional phenolic ester molecules onto natural chitosan molecules through a green free radical induced cross-linking technology, so as to form phenolic ester covalently grafted chitosan molecules (Phenolipid-g-CS, PC); and (2) the nanoparticles have excellent stability, good surface contact sterilization and photodynamic sterilization performance, nano-enzyme catalytic activity and oxidation resistance, and can synergistically exert an efficient sterilization effect under blue light irradiation.
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