In this study, visualizations and experiments are carried out on the influence of static and rotating magnetic fields on the characteristics of HCFC-141b gas hydrate formation, such as crystallization form, formation temperature and induction time. It has been found that a proper rotating magnetic field can considerably improve the low-pressure gas hydrate formation process, especially in increasing the formation temperature and shortening the induction time. The mor- phology of the gas hydrate formation appears rather complex and compact. However, a proper static magnetic field can make the gas hydrate crystal more organized, which will be benefit to heat transfer.
Several methods were chosen to try to synthesis polyaniline(PAn)\|graphite oxide (GO) composites in this paper. It was experimentally shown aniline could be easily inserted into GO layers, however, lower oxidative potential could not oxidatively polymerize the intercalated aniline to form polyaniline intercalated graphite oxide nanocomposite(Comp.Ⅱ). And also, when aliline intercalated GO was externally oxidized by aqueous FeCl\-3 or (NH\-4)\-2S\-2O\-8/HCl, a polyaniline encapsulated GO composite (Comp.I) could be only obtained. But when an exfoliation/absorption process was used, where polyaniline was \%in situ \% polymerized in exfoliated GO suspension, Comp.Ⅱ could be obtained. Otherwise, XRD, FT\|IR and DSC were used to characterize these composites. XRD measurements indicated the I \-C value of comp.Ⅱ increased from 7.62nm of GO to 1.78 nm, which suggests that there exists a single layer or/and bilayer of PAn chain in the GO layer. Data of FT\|IR measurement indicated the co\|existence of GO and Emeraldine Salt in the polymer intercalated GO, very likely accompanied by an existence of Emeraldine Base. Thermal analysis also showed that the thermal behaviors of Comp.Ⅱ were different from those of Comp.Ⅰ. And contrast to pristine GO, these two composites had a higher electrical conductivity σ , but Comp. Ⅱ had a much higher σ value than Comp.Ⅰ.due to the synergies of polyaniline and graphite oxide in Comp.Ⅱ, especially the chemically reduced Comp.Ⅱ, mainly due to a reduction of GO. It was shown by a four\|probe contact that the σ value of Comp.Ⅱ and the reduced Comp.Ⅱ was 1.45×10 -3 S/cm and 3 73×10 -2 S/cm, respectively.
