Antibacterial-type nanofiber-based preservative film and preparation method thereof

Abstract

The invention discloses an antibacterial-type nanofiber-based preservative film and a preparation method thereof. The novel antibacterial-type nanofiber-based preservative film which has the excellent mechanical property, can be completely degraded and completely meets the physical performance requirements of preservative films is prepared by taking micro-fibrillated nanocellulose (MFC) and chitosan as raw materials; the preservative film is prepared mainly through the step that ultrasonic blending is performed on the micro-fibrillated nanocellulose (MFC) and an aqueous acetic acid solution of chitosan under the appropriate proportion condition. Compared with a food preservation material on the market, the antibacterial-type nanofiber-based preservative film has the advantages that the production technology is simple, and the preparation cost is low; the preservative film also has the advantages of being efficient, antibacterial, high in air permeability, transparency, bonding property, skin film flexibility and wear resistance and the like, is a new-generation green and environment-friendly type preservative film for replacing an existing plastic preservative film, can serve as a material for packaging food and has the wide application prospect in the field of food packaging films.

Description

technical field [0001] The invention belongs to the field of preparation of degradable composite materials, and in particular relates to an antibacterial nanofiber-based fresh-keeping film and a preparation method. Background technique [0002] In recent years, people pay more and more attention to food safety, and people try to reduce food safety hazards in various ways. As one of the important members in the field of food circulation, food packaging materials not only have the advantages of beautiful products and easy storage, but also have the effect of keeping fresh and prolonging the aging period, which promotes the research in the field of food packaging films. The safety and functionality of food cling film has become one of the research hotspots. [0003] Statistics show that the food discarded due to rot in the world every year far exceeds the sum of the food provided by the United Nations to poor countries. The growth and reproduction of microorganisms is an impo...

AI Technical Summary

Problems solved by technology

However, as a natural polymer compound, cellulose has some disadvantages in performance, such as no resistance to chemical corrosion, limited strength, poor air permeability, low transparency, etc.

These physical forms also limit its range of applications

For example, researchers such as Ma Hao of Jinan University used ordinary cellulose and chitosan as the main raw materials to prepare composite films [article number 1004-8405 (2010) 02-0033-06], which have poor antibacterial properties, low transparency, and weak air permeability. , no adhesion and other problems, its physical properties are far from meeting the performance requirements of the national standard plastic wrap, but if it is prepared into nanomaterials, its performance can be largely optimized, making this renewable resource more wide range of applications