Effect of Modified Nano Silica on the Conductivity and Morphology Characteristics of Oxalic Acid-Doped Polyaniline Composites

• 发表在: International Journal of Electrochemical Science
• 主要作者: 2-s2.0-85101852691
• 格式: 文件
• 语言: English
• 出版: Electrochemical Science Group 2021
• 在线阅读: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85101852691&doi=10.20964%2f2021.02.27&partnerID=40&md5=a3d570e3fb868fee8043a440e5ce0e9d
• ISSN: 14523981
• DOI: 10.20964/2021.02.27

Oxalic acid-doped polyaniline (OA-PANI) was incorporated with nano silica and amino silane-modified nano silica. The polymerization of aniline to produce OA-PANI incorporating nano silica (OA-PANI-NS) and PANI incorporating 3-amino-propyltriethoxysilane modified nano silica (OA-PANI-NS-AS) were carried out in 0.1 M oxalic acid in the presence of ammonium persulphate as an oxidizing agent. Different amounts of nano silica and 3-amino-propyltriethoxysilane modified nano silica (13%, 15%, 20%, 30% and 50% w/w) were incorporated with OA-PANI to investigate its conductivity behavior using an impedance test. The successful formations of OA-PANI-NS and OA-PANI-NS-AS were confirmed by FTIR. The morphology of OA-PANI-NS and OA-PANI-NS-AS were studied using XRD and FESEM. Based on the results, the conductivity of OA-PANI-NS and OA-PANI-NS-AS increased linearly with the increased amount of nano silica and 3-amino-propyltriethoxysilane-modified nano silica w/w%, from 13 to 20% w/w. Further increased in the amount of both fillers caused a significant decreased in the conductivity of OA-PANI-NS and OA-PANI-NS-AS. The maximum electrical conductivity achieved for OA-PANI-NS and OA-PANI-NS-AS were 1.43 x 10-4 Scm-1 and 4.0 x10-6S cm-1, respectively. Lower conductivity of OA-PANI-NS-AS compared to OA-PANI-NS due to the presence of 3-amino-propyltriethoxysilane inhibited the ion movement in the OA-PANI matrix caused by the agglomeration phenomenon. © 2021 The Authors. Published by ESG (www.electrochemsci.org). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).