摘要
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.
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.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2000年第4期492-495,共4页
Acta Polymerica Sinica
基金
国家自然科学基金!重点资助项目 (基金号 5 983 62 3 0 )
关键词
氧化石墨
聚苯胺
纳米复合材料
合成
导电材料
Graphite oxide, Polyaniline, Structure analysis, Thermal analysis, Electrical conductivity
