聚苯胺/五氧化二钒插入型杂化纳米复合材料的合成与表征

SYNTHESIS AND CHARACTERIZATION OF INTERCALATIVE PHASES IN THE PAN/V_2O_5 HYBRID NANOCOMPOSITES

用原位氧化聚合法将聚苯胺分子链插入层状五氧化二钒的片层中,从而制得了一系列聚苯胺/五氧化二钒(PAn/V2O5)杂化纳米复合材料。采用WAXD、FT-IR、TGA及四探针电导率测量等手段对产物进行表征,结果表明,聚苯胺分子以单层形式在受限的纳米空间(五氧化二钒的片层中)生成,聚苯胺以伸展的单分子链存在,自由电子得到充分离域,PAn/V2O5杂化材料室温电导率在10-3S/cm～10-2S/cm之间。

Polyaniline is inserted into the galleries of V_2O_5·nH_2O xerogel by in situ oxidative polymerization to produce a series PAn/V_2O_5 hybrid nanocomposites. The properties of hybrid nanocomposites were characterized by WAXD, FT-IR, TGA and conductivity measurement. The results show that the polyaniline is intercalated into the V_2O_5 interlayer region, consistent with the nanocomposites nature of the material. The polyaniline exists in single chains with extended-chain conformation owing to the confined environment in the nanometer size gallery. The room-temperature conductivity of the PAn/V_2O_5 hybrid nanocomposites is in the range 10^(-3) S/cm～10^(-2) S/cm.