以FeCl3为氧化剂，植酸钠(IP6)为掺杂剂，纳米SiO2为分散介质，通过化学氧化法合成了具有核-壳结构的IP6掺杂聚吡咯(PPy)/纳米SiO2粒子。利用电感耦合等离子体原子发射光谱法考察了氧化剂和分散剂用量以及反应温度对掺杂率的影响。利用TEM、XRD和热重分析法(TG)对IP6掺杂PPy/纳米SiO2粒子的形貌、结构和热稳定性进行了表征。利用电化学阻抗(EIS)技术对IP6掺杂PPy/纳米SiO2/环氧树脂长效耐蚀复合涂层的耐蚀性进行了评价。结果表明:PPy均匀包覆在纳米SiO2粒子表面，形成形貌规则且具有核-壳结构的稳定IP6掺杂聚吡咯(PPy)/纳米SiO2粒子。当n(Py)∶n(FeCl3)=2∶1，m(SiO2)∶m(Py)=1∶5，反应温度为-5 ℃时，制备的PPy/纳米SiO2材料中IP6掺杂率为98.53%。以IP6掺杂PPy/纳米SiO2粒子为功能成分，环氧树脂为成膜物质，制备的IP6掺杂PPy/纳米SiO2/环氧树脂长效耐蚀复合涂层对1.0 mol/L HCl介质中的Q235钢腐蚀具有良好的抑制效果。

The phytate-doped polypyrole (PPy)/nano-SiO2 particles with a core-shell structure were synthesized by chemical oxidizing method using FeCl3 as oxidant, sodium phytate (IP6) as dopant, and nano-SiO2 as dispersion medium. The influences of oxidant and dispersant dosage and reaction temperature on the doping ratio were investigated by ICP-AES technique. The structure, morphology and stability of the prepared phytate-doped PPy/nano-SiO2 particles were characterized using TEM, XRD and TG techniques. The effect of the prepared long-life anti-corrosion coating on the corrosion of Q235 steel in 1.0 mol/L HCl was investigated by EIS measurement. The results show that the silica nano-particles were coated with polypyrole uniformly. The phytate-doped PPy/nano-SiO2 particles with high stability and core-shell structure were obtained. The high doping ratio of 98.53% was achieved under optimized reaction conditions: n(Py)∶n(FeCl3)=2∶1,m(SiO2)∶m(Py)=1∶5 and reaction temperature of -5 ℃. The long-life anti-corrosion phytate-doped PPy/nano-SiO2/epoxy resin coating prepared using phytate-doped PPy/nano-SiO2 particles as functional component and epoxy resin as main film forming material inhibited the corrosion of Q235 steel in 1.0 mol/L HCl solution effectively.