In order to improve optical property of the multi-walled carbon nanotubes(MWNTs),MWNTs were decorated with europium oxide(Eu2O3) nanoparticles by using co-deposition method. The MWNTs/Eu2O3 composites were examined by XRD,scanning electron microscopy,transmission electron microscopy,and VUV-Vis Luminescence spectroscopy and citric acid(CA) molecules were introduced onto the surface of MWNTs. The results show that there are many oxygenated functional groups on the surface of the MWNTs after the treatment of mixture acid,such as carboxy,hydroxl,carbony and amidocyanogen. The results of electron microscopy illuminate that the MWNTs are coated by nano-europium oxide after annealed at 750℃. The MWNTs/Eu2O3 composite emits much strong red light at about 610 nm under UV excitation.
Carbon nanotube （CNT）/maleic acid anhydride （MAH）-grafted polypropylene （PP） composites were prepared by in situ grafting method. Infrared spectroscopy showed that the CNTs were linked to PP by MAH grafting. The microstructures and calorimetry analysis indicated that the crystallization behaviors of the filled and unfilled PP were quite different. The addition of CNTs dramatically reduced the spherulite size, increased crystallization rate and improved the thermal stability of PP. These results confirmed the expected nucleant effect of CNT on the crystallization of PP. Scanning and transmission electron microscopy showed that the CNTs were dispersed homogeneously, indicating that the original CNT bundles were separated into individual tubes by the grafting.
Xiaohua CHENJing HULingping ZHOUWenhua LIZi YANGYanguo WANG
