Green synthesis process of a polyurethane-silver nanocomposite having biocide surfaces

Silver nanoparticles were prepared by microwave irradiation of a silver nitrate (AgNO 3 ) aqueous solution in poly(ethylene glycol) (PEG) in the absence of other chemicals. Optimal monodispersed, stable and spherical silver nanoparticles with 35±5 nm diameter were obtained after 20 min of microwave...

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Bibliographic Details
Published in:	Polymer journal Vol. 44; no. 12; pp. 1230 - 1237
Main Authors:	Mtimet, Issam, Lecamp, Laurence, Kebir, Nasreddine, Burel, Fabrice, Jouenne, Thierry
Format:	Journal Article
Language:	English
Published:	London Nature Publishing Group UK 01-12-2012 Nature Publishing Group
Subjects:	639/638/455/941 639/638/455/957 Applied sciences Biocides Biomaterials Bioorganic Chemistry Chemical Sciences Chemistry Chemistry and Materials Science Chemistry/Food Science Composites Exact sciences and technology Forms of application and semi-finished materials Irradiation Microwaves Nanoparticles Nanostructure original-article Plutonium Polymer industry, paints, wood Polymer Sciences Polymers Silver Surfaces and Interfaces Synthesis Technology of polymers Thin Films antibacterial activity poly(ethylene glycol) ilver nanoparticles waterborne PU Biological properties Ionomer Mixing Dispersion degree Mechanical properties Silver nitrate Experimental study Metal particle Thermal stability Bactericidal effect Chemical reduction Silver silver nanoparticles Morphology Microwave irradiation Monodispersed particle Nanocomposite Manufacturing Etherurethane polymer
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Summary:	Silver nanoparticles were prepared by microwave irradiation of a silver nitrate (AgNO 3 ) aqueous solution in poly(ethylene glycol) (PEG) in the absence of other chemicals. Optimal monodispersed, stable and spherical silver nanoparticles with 35±5 nm diameter were obtained after 20 min of microwave irradiation at 120 °C in the presence of PEG 2000. Polyurethanes (PUs) containing silver (Ag) nanoparticles (35 nm, 1 × 10 −3 –3 × 10 −3 wt-%) were then prepared by introducing the nanoparticles suspension at different times of the waterborne PU synthesis. The Ag nanoparticles were found to be well dispersed in PU when introduced initially with the reagents. In these conditions, the PEG was well chemically linked to the PU chains and the presence of Ag nanoparticles didn’t impact the thermo-mechanical properties of the PU. The prepared silver nanoparticles exhibited biocidal properties against Pseudomonas aeruginosa and Enterococcus faecalis both in liquid suspension and on the PUs surfaces. Monodispersed spherical silver nanoparticles with 35±5 nm diameter were prepared by microwave irradiation of an AgNO 3 aqueous solution in poly(ethylene glycol) (PEG). Thanks to the hydroxyl groups at the chain-ends of the PEG, the matrix of the Ag nanoparticles suspension was well incorporated into a polyurethane backbone, allowing a good distribution of the metal particles inside the final nanocomposite without aggregation. An optimal antibacterial activity was observed for a 35 p.p.m. Ag concentration against P. aeruginosa and E. faecalis without significant variation of the intrinsic physicochemical properties of polyurethane material.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0032-3896 1349-0540
DOI:	10.1038/pj.2012.90