In this work, one-dimensional core-shell nanorods （CSNRs; 185-250nm wide and 1-1.5μm long） consisting of triethoxyvinylsilane-modified wollastonite （CaSiO3） nanorods （MWNRs） as a core and polystyrene as a shell...In this work, one-dimensional core-shell nanorods （CSNRs; 185-250nm wide and 1-1.5μm long） consisting of triethoxyvinylsilane-modified wollastonite （CaSiO3） nanorods （MWNRs） as a core and polystyrene as a shell with uniform size were successfully synthesized using an advanced microemulsion technique. The effect of varying the surfactant cetyltrimethylammonium bromide （producing CSNRSCTAB） or sodium dodecyl sulphate （producing CSNRSSDS） upon the size and morphology of the CSNRs was investigated by field-emission scanning electron microscopy （FE-SEM）. X-ray diffractometry and Fourier transform infrared spectrophotometer revealed the existence of a strong interaction between the MWNRs and polystyrene, which implies that the polymer chains were successfully grafted onto the surface of the MWNRs. The CSNRs were blended with polypropylene by melt processing, and the effect of the CSNRs upon the morphological properties of the polypropylene matrix was investigated by FE-SEM and atomic force microscopy. It was observed that the polystyrene chains that grafted onto the CaSiO3 nanorods interfered with the aggregation of CaSiO3 nanorods in the polypropylene matrix and thus improved the compatibility of the CaSiO3 nanorods with the polypropylene matrix. Furthermore, the compatibility of CaSiO3 nanorods with polypropylene of CSNRsDs/polypropylene was superior to that of CSNRCTAB/polypropylene.展开更多
文摘In this work, one-dimensional core-shell nanorods （CSNRs; 185-250nm wide and 1-1.5μm long） consisting of triethoxyvinylsilane-modified wollastonite （CaSiO3） nanorods （MWNRs） as a core and polystyrene as a shell with uniform size were successfully synthesized using an advanced microemulsion technique. The effect of varying the surfactant cetyltrimethylammonium bromide （producing CSNRSCTAB） or sodium dodecyl sulphate （producing CSNRSSDS） upon the size and morphology of the CSNRs was investigated by field-emission scanning electron microscopy （FE-SEM）. X-ray diffractometry and Fourier transform infrared spectrophotometer revealed the existence of a strong interaction between the MWNRs and polystyrene, which implies that the polymer chains were successfully grafted onto the surface of the MWNRs. The CSNRs were blended with polypropylene by melt processing, and the effect of the CSNRs upon the morphological properties of the polypropylene matrix was investigated by FE-SEM and atomic force microscopy. It was observed that the polystyrene chains that grafted onto the CaSiO3 nanorods interfered with the aggregation of CaSiO3 nanorods in the polypropylene matrix and thus improved the compatibility of the CaSiO3 nanorods with the polypropylene matrix. Furthermore, the compatibility of CaSiO3 nanorods with polypropylene of CSNRsDs/polypropylene was superior to that of CSNRCTAB/polypropylene.
