Electrospun polyacrylonitrile (PAN) nanofibers were decorated with TiO2, ZnO and TiO2/ZnO nanoparticles for the first time to prepare flexible multifunctional nanofibrous membranes.

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In this article, the mechanical properties and dynamic response of hybrid filler-modified epoxy/carbon fiber multiscale composites were investigated. The hybrid fillers composed of multiwalled carbon nanotubes and boron nitride nanoplates were dispersed in epoxy resin and used as matrix material. The multiscale hybrid laminated composites were stacked symmetrically consisting of 10 plies of woven carbon fibers and fabricated by vacuum infusion technique. The mechanical properties of the hybrid composites were investigated by tensile tests. Impact response and energy absorption capacity were investigated by using weight drop test method and the tests were performed according to ASTM-D-7136 standard with impact energies of 5, 10, and 15 J. The impact force and displacement versus interaction time were measured. The impulsive force, energy absorption capability, and damage formation were also investigated. It is observed that when the resin is modified by nanoparticles, both strength and the % strain at fracture increase considerably. However, it is shown in the subject manuscript that the enhancement of mechanical has not fully transferred to dynamic response and energy absorption capacities of nanocomposites.

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Copper oxide (CuO) nanoparticles were synthesized successfully by arc discharge method in an aqueous medium. Arc discharge was ignited between two copper electrodes and an exhaustive characterization of morphology and crystalline structure of the drawn up copper oxide nanoparticles were studied. Electron microscopy analyses revealed that the grown CuO nanoparticles are irregularly shaped with nominal diameters in the interval of 10-50 nm. XRD results show the as-synthesized particles contain only CuO peaks without any impurities. The results procure a simple, cheap and responsive method for preparing single-phase CuO nanoparticles.