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This study deals with the effect of chemical modification of wood flour by components including alkaline, silane, acrylic acid and benzoyl chloride, and PP-g-MA coupling agent concentration (0 and 3 wt%) on the mechanical performance of WPCs. The samples were fabricated by melt compounding in an internal mixer and then injection molding. Tensile, flexural, and Izod impact test of modified composites were performed and compared by net polypropylene and unmodified samples. The results showed that the highest tensile and flexural resistance was observed in composites modified with alkaline and including coupling agent. Modified composites had lower impact strength than unmodified ones. Simultaneous use of chemical modification and coupling agent on mechanical properties had synergic effect. Therefore, chemical modification of wood flour improved interfacial adhesion and so increased the mechanical performance of these composites.

Herein, we describe the fabrication of NiO decorated single wall carbon nanotubes (NiO-SWCNTs) nanocomposites using the precipitation method. The synthesized NiO-SWCNTs nanocomposites were characterized by X-ray diffraction (XRD) and Transmission electron microscopy (TEM). Remarkably, NiO-SWCNTs and 1-butylpyridinium hexafluorophosphate modified carbon paste electrode (CPE/NiO-SWCNTs/BPrPF6) were employed for the electrochemical detection of vanillin. The vanillin sensor showed an ultra-high sensitivity of 0.3594 μA/μM and a low detection limit of 0.007 μM. In the final step, the NiO-SWCNTs/BPrPF6 was used as the suitable tool for food analysis.

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