The synthesis of graphite oxide (GrO) by oxidation of graphite has been carried out by different procedures. In this chapter, we describe a simple synthesis route based on Hummers' method without the usage of NaNO 3 achieving nearly the same outcomes, and this methodology is directed toward high-quality scale production of GrO with similar properties compared with GrO obtained with traditional and improved Hummers' methods. The GrO was obtained in a series of batch reactions and characterized by different techniques, and the results showed identical interlayer d-space, type and content of oxygen functionalities, and I D /I G ratio. The high reproducibility of this methodology offers an efficient alternative for the large-scale production of graphene oxide.
In this work, the microwave synthesis of Nylon-6 hybrid polymeric nanocomposite (HPNC) was studied by the polymerization of ε-caprolactam, 6-aminocaproic acid, and 2% wt of silver nanoparticles (Ag-NPs). It was determined that the dielectric heating (DH) of the Ag-NPs controls the thermal behavior of the HPNCs synthesis and triggers the chemical reaction between Ag-NPs and the Nylon-6 molecules. Such reaction promotes their coating with the polymer and their precipitation, which affects the agitation of the reaction mixture, and results in broader molecular weight distribution and three HPNC populations. Usually, the power output effect in these processes is thermal as it accelerates their heating rate. Still, for HPNCs, higher output reduces the agglomerate size of the Ag-NPs and accelerates their precipitation. At power up to 600 W, the DH of the Ag-NPs causes the explosion of the reaction vials.The antimicrobial activity of the HPNCs against P. aeruginosa is almost 100% effective at 180 min of exposure; therefore, this microwave synthesis process is suitable for producing antimicrobial HPNCs.
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