Nuclear chemistry

Composite number

Engineering

Nanoparticle

Bacteria

Biology

Antimicrobial

Materials science

Graphene

Nanocomposite

Chitosan

Antibacterial activity

Silver nanoparticle

Chemical engineering

Food science

Food packaging

Genetics

Nanotechnology

Organic chemistry

Composite material

Chemistry

Carbohydrate Polymers

Bacterial breeding is the main cause of food perishability, which is harmful to human health. Silver nanoparticles (AgNPs) are one of the most widely used antimicrobial agents, but they are easy to release and cause cumulative toxicity. In this work, with corn stalk as green reductant and GO as template, a simple electrostatic self-assembled sandwich-like chitosan (CS) wrapped [email protected] nanocomposite film (CS/[email protected]) was synthesized to achieve stabilizing and controlled-release of AgNPs. The results showed that the the CS/[email protected] film continued releasing AgNPs for up to 14 days, and the final release amount of silver nanoparticles was only about 1.9 %. More importantly, the nanocomposite film showed durable antibacterial effect and good antibacterial activity against E. coli and S. aureus, and they showed no toxicity to cells. Hence, the nanocomposite film has potential application as an effective and safe packaging material to prolong the shelf life of food products.

A sandwich-like chitosan-based antibacterial nanocomposite film with reduced graphene oxide immobilized silver nanoparticles