Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 20, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/ijms20020439
Keywords
cuprous oxide nanoparticles; linear low-density polyethylene; composites; adhesives; antibacterial activity; water disinfection
Funding
- Research Authority of the Ariel University, Israel
- Cherna Moskowitz Foundation, California, USA
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Cuprous oxide nanoparticles (Cu(2)ONPs) were used for preparing composites with linear low-density polyethylene (LLDPE) by co-extrusion, thermal adhesion, and attachment using ethyl cyanoacrylate, trimethoxyvinylsilane, and epoxy resin. The composites were examined by Scanning electron microscope and tested for their antibacterial activity against Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli. All of these composites-except for the one obtained by extrusion-eradicated cells of both bacteria within half an hour. The composite prepared by thermal adhesion of Cu(2)ONPs on LLDPE had the highest external exposure of nanoparticles and exhibited the highest activity against the bacteria. This composite and the one obtained using ethyl cyanoacrylate showed no leaching of copper ions into the aqueous phase. Copper ion leaching from composites prepared with trimethoxyvinylsilane and epoxy resin was very low. The antibacterial activity of the composites can be rated as follows: obtained by thermal adhesion > obtained using ethyl cyanoacrylate > obtained using trimethoxyvinylsilane > obtained using epoxy resin > obtained by extrusion. The composites with the highest activity are potential materials for tap water and wastewater disinfection.
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