Patents by Inventor Yuping Ning

Yuping Ning has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 12104029
    Abstract: A preparation method of a high-barrier antibacterial flame-retardant food packaging film solves problems that an existing food packaging film is non-degradable, poor in preservation effect, and inflammable. The preparation method includes: performing blending reaction on chitosan quaternary ammonium salt and phytic acid to generate a polyelectrolyte complex; and adding the polyelectrolyte complex into a polyvinyl alcohol solution, heating the polyvinyl alcohol solution added with the polyelectrolyte complex to obtain a film-forming solution, pouring the film-forming solution into a mold, leveling and drying the film-forming solution to obtain the high-barrier antibacterial flame-retardant food packaging film. The food packaging film has water vapor permeability in 1.82-2.58×10?8 g·s?1·m?1·Pa?1, oxygen permeability in 1.63-12.31 cm3·mm?2·Pa?1·day?1, and a value of limiting oxygen index (LOI) in 28.10%-33.33%.
    Type: Grant
    Filed: April 18, 2024
    Date of Patent: October 1, 2024
    Assignee: NORTHEAST FORESTRY UNIVERSITY
    Inventors: Lijuan Wang, Yuping Ning, Na Wei, Zijing Pan, Jian Li