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Fabrication of silver-nanoparticles-embedded polymer masterbatchs with excellent antibacterial performance

In the present work, a versatile and effective synthesis method of the silver-nanoparticlesembedded polyethylene (PE)-based polymer masterbatchs was demonstrated. Antibacterial investigations revealed that the nano-silver masterbatchs consisting of oleate capped silver nanoparticles dispersed in PE polymer matrix exhibited excellent antibacterial performance against Gram-negative Escherichia Coli (E.coli) and Staphylococcus aureus (S. aureus) bacteria. | Journal of Chemistry, Vol. 47 (5), P. 574 - 580, 2009 Fabrication of silver-nanoparticles-embedded polymer masterbatchs with excellent antibacterial performance Received 10 November 2008 1 Trinh Thi Hang , Phuong Dinh Tam1, Tran Quang Huy1, Le Anh Tuan1,* 1 Department of Nanoscience and Nanotechnology, Hanoi Advanced School of Science and Technology (HAST), Hanoi University of Technology 2 National Institute of Hygiene and Epidemiology (NIHE), Hanoi, Vietnam Abstract In the present work, a versatile and effective synthesis method of the silver-nanoparticlesembedded polyethylene (PE)-based polymer masterbatchs was demonstrated. Antibacterial investigations revealed that the nano-silver masterbatchs consisting of oleate capped silver nanoparticles dispersed in PE polymer matrix exhibited excellent antibacterial performance against Gram-negative Escherichia Coli (E.coli) and Staphylococcus aureus (S. aureus) bacteria. A complete inhibition in bacteria growth was found at a silver nanoparticles concentration as low as 600 ppm. The origin of bactericidal effect and interaction mechanism of the stabilized silver nanoparticles with the Gram-negative E. coli and Gram-positive S. aureus bacteria can be understood in the light of electron microscopic observation. These advances make the synthesized nano-silver masterbatchs ideal for mass production of effectively antibacterial green products in medical, biological and industrial sectors. The type of polymer resin and silver concentration can be adjusted depending on the application area. Keywords: Silver nanoparticles; nanosilver masterbatch; anti-microbial effect, green synthesis, thermal decomposition. I - Introduction During the last decade, due to the emergence of a new generation of high technology materials, the number of groups involved in nanomaterials has increased rapidly. Nanomaterials are implicated in several domains such as chemistry, electronics, high density magnetic recording media, sensors .