聚苯胺/聚苯乙烯复合Janus颗粒的制备

摘要

利用有机溶剂溶胀磺化聚苯乙烯@二氧化钛(SPS@TiO2)核壳粒子制得二氧化钛/聚苯乙烯(TiO2/PS)双面神(Janus)颗粒,并在TiO2端进行改性,得到墨绿色的聚苯胺/聚苯乙烯(PANi/PS) Janus颗粒.用扫描电子显微镜(SEM)、电子能谱(EDS)、元素分析、透射电子显微镜(TEM)、红外光谱(IR)、热重分析(TGA)、固体紫外-可见分析(UV-Vis)和四探针法考察Janus颗粒组成、微结构和Janus性质.结果表明,JanuS颗粒为雪人状结构,PS端的平均粒径为228 nm,PANi端的平均粒径从TiO2的258 nm增大为295 nm；并且在EDS谱上可以观察到N元素,而未观察到Ti元素；包覆的PANi的质量分数为23.7％.掺杂后PANi/PS Janus颗粒的导电性能较好,电导率为0.247 S/cm.%A general approach of swelling was used to synthesize the TiO2/PS Janus composite particles.The TiO2/PS Janus composite particles were modified at the knob of TiO2 with aniline to synthesize the PANi/PS Janus composite particles.The surface morphology,component and properties of Janus particles were characterized by scanning electron microscope(SEM),energy dispersive spectrometer(EDS),elemental analysis,transmission electron microscope (TEM),Fourier transform infrared spectrometer(FHR),thermogravimetric analysis(TGA),ultraviolet spectrophotometer(UV) and four-probe measurement.The results showed that the snowman-like PANi/PS composite particles were dark green.The average diameter of the knob of PS was about 228 nm and that of PANi knob increased from 258 nm which was the average diameter of TiO2 knob in TiO2/PS Janus composite particles to 295 nm.Ti elements could not observed by EDS which was replaced by N element.The mass fraction of PANi in PANi/PS Janus composite particles was about 23.7％.Compared with that of the TiO2/PS Janus composite particles,the conductive properties of PANi/PS Janus particles which was redoped by p-toluenesulfonic acid increased obviously and the conductivity was 0.247 S/cm.