METHOD OF IMMOBILIZATION OF SILVER NANOPARTICLES ON SOLID SUBSTRATES

摘要

The two-step immobilisation of silver nanoparticles on solid substrates using polyethylenimine as adhesive and reduction linker, where the primary coating of solid substrates by polyethylenimine occurs followed by production of silver nanoparticles covalently anchored on polymer surface thanks to reduction effect of its functional groups and therefore, no nanoparticles are released to environment. The method permits working under aqueous conditions, does not use any reducing agents, stabilisers or toxic solvents and can universally be applied for anti-microbial treatments of all types of solid substrates.

主权项

1. The method of immobilisation of silver nanoparticles on solid substrates characterized by that the immobilisation occurs in two steps, where in the first step the selected substrate is modified by polyethylenimine (PEI) with branched structure by a simple submerging of the selected substrate to a bath consisting of aqueous solution of this polymer and then, the excess is washed off the substrate surface after its removal from the bath and the modified PEI substrate is submerged in the second step to silver salt solution where the production of the nanoparticles proceeds ,due to reduction properties of the functional groups —NH and —NH2 present in the polymer and the nanoparticles remain covalently immobilised to the primary deposited adhesive PEI layer of polyethylenimine.