| Summary: | 碩士 === 南台科技大學 === 化學工程與材枓工程系 === 101 === The thesis was divided into three parts. In the first and second parts, the dodecylbenzene sulfonic acid (DBSA) and nitric acid (HNO3) were used as dopants for polyanline, respectively. Polyaniline doped by DBSA/clay (PANI-DBSA/clay) and polyaniline doped by HNO3/clay (PANI-HNO3/clay) were prepared by the in-situ polymerization method. The influences of the clay content on the properties of PANI-DBSA/clay and PANI-HNO3/clay nanocomposites were studied. XRD and TEM results showed that the clay layers were intercalated with the conducting PANI-DBSA and PANI-HNO3, but the effect was not obvious. The conductivities of PANI-DBSA/clay and PANI-HNO3/clay nanocomposites decreased with the clay content increased (from 0.591 S/cm to 0.302 S/cm and 2.067 S/cm to 0.035 S/cm, respectively). In the third part, the aniline (AN), dodecylbenzene sulfonic acid (DBSA) and nitric acid (HNO3) were simultaneously added to the clay aqueous solution, the in-situ polymerization method was used to prepare conductive PANI-DBSA-HNO3/clay nanocomposite. XRD and TEM results showed that the interlayer spacing of the clay was successfully increased by the co-doping process. Most clay was exfoliated by co-doping process. The conductivity of PANI-DBSA-HNO3/clay nanocomposite decreased with clay content (from 2.593 S/cm to 0.542 S/cm). The STA result showed that the degradation temperature (Td) increased with clay content. The corrosion performance of PANI-DBSA-HNO3/clay nanocomposite coating on CRS has been studied by electrochemical impedance spectroscopy (EIS) in a 3.5 wt % NaCl solution. The EIS result showed that the corrosion resistance was enhanced by the addition of clay. From experimental results, the clay can be effectively exfoliated by the co-doping process in this study.
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