Cellulose nanocrystals to fight bacteria

In recent decades, silver nanoparticles (NPAgs) have emerged as one of the most effective biocidal agents, limiting and preventing the proliferation of microorganisms and bacteria.

NPAgs are widely used in several fields (paint, cosmetics, dental equipment, water treatment) due to their high surface-to-volume ratio and relatively low toxicity to human health. However, at the end of their life, these biocides become products that are aggressive for the environment.

Since biomolecules cannot provide the solution for an effective biocidal activity, the idea here is to combine biomolecules and silver particles to form a largely inert biocidal hybrid.

Cellulose nanocrystals (CNCs) are an ideal biosourced substrate, capable of being modified at the surface. In this protocol, the silver nanoparticles are directly anchored to the surface of the NCCs, forming a stable NCC/Ag hybrid which is easily dispersed in an aqueous medium.