Yuvaraj Haldorai, Woo Min Hee, Park Eun Ju, Gal Yeong-Soon, Lim Kwon Taek
Division of Image and Information Engineering, Pukyong National University, Busan 608-739, Korea.
J Nanosci Nanotechnol. 2008 Sep;8(9):4743-6. doi: 10.1166/jnn.2008.ic60.
Poly(3-octylthiophene) (P3OT)-titanium dioxide (TiO2) nanocomposite powder where TiO2 was embedded with homogeneous dispersion was synthesized by in-situ chemical oxidative polymerization of 3-octylthiophene in the presence of TiO2 nanoparticles in supercritical carbon dioxide (scCO2), using ferric chloride as the oxidant. The synthesized materials could be obtained as dry powder upon venting of CO2 after the polymerization. The composites were subsequently characterized by FT-IR spectroscopy, transmission electron microscopy (TEM), X-ray diffraction studies (XRD), thermogravimetric analysis (TGA) and photoluminescence (PL). The incorporation of TiO2 in the composite was endorsed by FT-IR studies. TGA revealed enhanced thermal stability of P3OT/TiO2 nanocomposite compared to 3-octylthiophene. TEM analysis showed that well dispersed TiO2 nanoparticles in the polymer matrix. Photoluminescence quenching increased with increasing TiO2 concentration in the composite.
通过在超临界二氧化碳（scCO2）中，以二氧化钛纳米颗粒为介质，以氯化铁为氧化剂，使3 - 辛基噻吩进行原位化学氧化聚合反应，合成了二氧化钛（TiO2）均匀分散于其中的聚（3 - 辛基噻吩）（P3OT）-二氧化钛（TiO2）纳米复合粉末。聚合反应后，通过排出二氧化碳可得到干燥的合成材料粉末。随后，采用傅里叶变换红外光谱（FT - IR）、透射电子显微镜（TEM）、X射线衍射研究（XRD）、热重分析（TGA）和光致发光（PL）对复合材料进行表征。FT - IR研究证实了复合材料中TiO2的掺入。TGA显示，与3 - 辛基噻吩相比，P3OT/TiO2纳米复合材料的热稳定性增强。TEM分析表明，TiO2纳米颗粒在聚合物基体中分散良好。随着复合材料中TiO2浓度的增加，光致发光猝灭增强。
