Aldalbahi Ali, Feng Peter, Alhokbany Norah, Al-Farraj Eida, Alshehri Saad M, Ahamad Tansir
Department of Chemistry, King Saud University, Riyadh, Saudi Arabia.
Institute of Functional Nanomaterials, University of Puerto Rico, San Juan, PR 00936-8377, USA; Department of Physics, College of Natural Sciences, University of Puerto Rico, San Juan, PR 00936-8377, USA.
Spectrochim Acta A Mol Biomol Spectrosc. 2017 Feb 15;173:502-509. doi: 10.1016/j.saa.2016.09.009. Epub 2016 Sep 12.
Functionalized (MWCNTs-COOH), non-functionalized multiwalled carbon nanotubes (MWCNTs) and polyaniline (PANI) based conducting nanocomposites (PANI/polymer/MWCNTs and PANI/polymer/MWCNTs-COOH) have been prepared in polymer matrix. The prepared nanocomposites were characterized via FTIR, TGA, Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). It was observed that the prepared conducting nanocomposites show excellent sensing performances toward CH at room temperature and both the response and recovery time were recorded at around 5s, respectively, at the room. The PANI/polymer/MWCNTs based detector had quicker/shorter response time (<1s), as well as higher sensitivity (3.1%) than that of the PANI/polymer/MWCNTs-COOH based detector. This was attributed to nonconductive -COOH that results in a poor sensitivity of PANI/polymer/MWCNTs-COOH-based prototype. The PANI/polymer/MWCNTs-COOH nanocomposites show almost 10 time higher sensitivity at higher temperature (60°C) than that at room temperature.
已在聚合物基体中制备了功能化的（多壁碳纳米管-COOH）、非功能化的多壁碳纳米管（MWCNTs）以及基于聚苯胺（PANI）的导电纳米复合材料（PANI/聚合物/MWCNTs和PANI/聚合物/MWCNTs-COOH）。通过傅里叶变换红外光谱（FTIR）、热重分析（TGA）、拉曼光谱、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和X射线衍射（XRD）对制备的纳米复合材料进行了表征。观察到所制备的导电纳米复合材料在室温下对CH表现出优异的传感性能，响应时间和恢复时间在室温下分别记录为约5秒。基于PANI/聚合物/MWCNTs的探测器具有更快/更短的响应时间（<1秒），并且比基于PANI/聚合物/MWCNTs-COOH的探测器具有更高的灵敏度（3.1%）。这归因于非导电的-COOH导致基于PANI/聚合物/MWCNTs-COOH的原型灵敏度较差。PANI/聚合物/MWCNTs-COOH纳米复合材料在较高温度（60°C）下的灵敏度比室温下高出近10倍。
