• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and characterization of a conducting polyaniline/TiO_2-SiO_2 composites
【24h】

Synthesis and characterization of a conducting polyaniline/TiO_2-SiO_2 composites

机译：导电聚苯胺/ TiO_2-SiO_2复合材料的合成与表征

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Polyaniline/TiO_2-SiO_2 composites were prepared by an in situ chemical oxidation polymerization approach in the presence of hybrid TiO_2-SiO_2 fillers. The obtained polyaniline/TiO _2-SiO_2 composites were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectrometer (FTIR), X-ray diffraction (XRD), thermogravimetry (TG), and current-voltage (I-V) measurements. SEM picture shows a variation in morphology of polyaniline (PANI) from fiber shape to relatively regular particle shape with increasing TiO_2-SiO_2 contents in the composites. The floccule-like structures were observed by high resolution TEM, which may help improve the efficiency of conductive network. SEM, XRD, TG, and FTIR spectra all reveal that a relatively strong interaction exist between TiO_2-SiO_2 and PANI. The I-V characteristics in such composites indicate that the charge transport is mainly governed by the space charge effects, which occurs at the interface between the conducting PANI and TiO_2-SiO_2. Meanwhile, PANI/TiO_2-SiO_2 composites exhibit significant increase in conductivity than PANI/TiO _2 or PANI/SiO_2. The reasons about high conductivity of PANI/TiO_2-SiO_2 have also been discussed.
机译：在杂化TiO_2-SiO_2填料存在下，采用原位化学氧化聚合法制备了聚苯胺/ TiO_2-SiO_2复合材料。通过扫描电子显微镜（SEM），透射电子显微镜（TEM），傅立叶变换红外光谱仪（FTIR），X射线衍射（XRD），热重分析（TG）和电流-电子显微镜（SEM）对所得的聚苯胺/ TiO _2-SiO_2复合材料进行表征。电压（IV）测量。 SEM照片显示，随着复合材料中TiO_2-SiO_2含量的增加，聚苯胺（PANI）的形态从纤维形状变为相对规则的颗粒形状。高分辨率TEM观察到了絮状结构，有助于提高导电网络的效率。 SEM，XRD，TG和FTIR光谱均表明TiO_2-SiO_2与PANI之间存在较强的相互作用。这种复合材料的I-V特性表明，电荷传输主要受空间电荷效应支配，该效应发生在导电PANI和TiO_2-SiO_2之间的界面处。同时，PANI / TiO_2-SiO_2复合材料的电导率明显高于PANI / TiO_2或PANI / SiO_2。还讨论了PANI / TiO_2-SiO_2高电导率的原因。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号