聚吡咯
材料科学
蒙脱石
纳米复合材料
静电纺丝
傅里叶变换红外光谱
纳米纤维
化学工程
聚合
导电聚合物
原位聚合
扫描电子显微镜
高分子化学
复合材料
聚合物
工程类
作者
Lindembergue Pereira Costa Júnior,Dáfenes B.R. dos S. Silva,Maurício F. de Aguiar,Celso P. de Melo,Kleber Gonçalves Bezerra Alves
标识
DOI:10.1016/j.molliq.2018.11.084
摘要
We performed an aqueous in situ polymerization of pyrrole in presence of modified montmorillonite particles to obtain a polypyrrole/organophilic montmorillonite clay (PPy/MMTO) nanocomposite with an intercalated structure. The natural clay was previously modified to become organophilic. The PPy/MMTO was mixed to PVA to prepare nanofibers through electrospinning methods. The different nanocomposites were characterized through Fourier transform infrared spectroscopy and UV–Vis spectroscopy, X-ray diffraction, scanning electron microscopy and impedance spectroscopy. We confirmed the clay organophilization by observing the (001) plane displacement from 6,1° to 5,5° and the presence of absorption bands in 2924 cm−1, 2853 cm−1 and 1479 cm−1, by XRD and FTIR analyses, respectively. We observed that the conductivity of the final PVA/PPy-MMTO nanofibers increased upon exposure to ammonia vapors, confirming that this hybrid material exhibits promising properties for use as active elements in gas sensors.
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