This paper describes the synthesis and characterization of copper nanoparticles (O) - Cu NPs (O) - applying the method assisted polyol ( glycolysis ) microwave ( MW ) , using an organic synthetic precursor of Cu ( II ) previously synthesized and polyethylene terephthalate ( PET ), the depolymerization reaction by MW was conducted with ethylene glycol (EG) by its high dielectric constant ( 41.4 at 298K ) and dielectric loss , allowing it to be rapidly heated with microwave radiation and achieving speed reduction rate metal ions in the system. At this stage , the formed byproducts are terephthalate , bis ( 2-hydroxyethyl ) ( BHET ) , dimers of BHET and / or oligomers thereof, which serve as stabilizing agents and to achieve encapsulate NPsCu (O) , preventing their autoxidation . Subsequently, the system was subjected to an ultrasonic pulse ( U.S. ) , which due to the internal cavilación g...

In this paper, the dispersion of a precursor of the silver nanoparticles of silver carboxylate a polyether polyol triol, followed by reduction of sílver polymerization via ultrasound and polyether polyol triol with isophorone diisocyanate and 1 ,4-butanediol as chain extender, under appropriate temperature and agitation, the reaclion is catalyzed by an organometallic compound dibutyl tin laurate and activated by the addition of deionized water. The solid formed polyurethane has in its structure dispersed nanosilver atoms, acquiring bactericida! properties and bright gold.

El presente estudio describe la síntesis y caracterización de las nanopartículas de cobre(O) - NPs Cu(O) - aplicando el método poliol(glicólisis) asistida por microondas (MW), utilizando un precursor sintético orgánico de Cu(II) previamente sintetizado y Tereftalato de polietileno (PET); la reacción de despolimerización por MW fue realizado con etilenglicol (EG) por su alta constante dieléctrica ( 41,4 a 298K) y pérdida dieléctrica, permitiendo ser calentado rápidamente con radiación microondas y logrando acelerar la velocidad de reducción de los iones metálicos del sistema. En esta etapa, los productos secundarios formados son tereftalato de bis-(2-hidroxietilo) (BHET), dímeros del BHET y/o sus oligómeros, que sirven como agentes estabilizantes y logran encapsular a las NPsCu(O), evitando su autoxidación. Posteriormente, el sistema fue sometido a un pulso ultrasónico...

In this paper, the dispersion of a precursor of the silver nanoparticles of silver carboxylate a polyether polyol triol, followed by reduction of sílver polymerization via ultrasound and polyether polyol triol with isophorone diisocyanate and 1 ,4-butanediol as chain extender, under appropriate temperature and agitation, the reaclion is catalyzed by an organometallic compound dibutyl tin laurate and activated by the addition of deionized water. The solid formed polyurethane has in its structure dispersed nanosilver atoms, acquiring bactericida! properties and bright gold.