Synthesis of Core-Shell Composite of Conductive Polymeric Materials onto Silica Using Supercritical Carbon Dioxide. (2020)

• Record Type: Journal Article
• Authors: Huang, Ssu-Hao; Chen, Pei-Hua; Chen, Yan-Ping; Tang, Muoi
• Is Part Of: MRS advances. Volume 5:Number 40/41(2020)
• Page Start: 2121
• Page End: 2127
• Publication Date: 2020
• Subjects: chemical synthesis, -- core/shell, -- composite, -- polymerization; Electrical engineering -- Congresses; Physics -- Congresses; Materials -- Research -- Congresses; Materials science -- Congresses; 620.11
• DOI: 10.1557/adv.2020.201
• Languages: English
• ISSNs: 2059-8521

Abstract

ABSTRACT: The polymerization of 3, 4-ethylenedioxythiophene (EDOT) onto nanosilica (SiO2 ) was synthesized in this study by using supercritical carbon dioxide (SCCO2 ). With the addition of dopants of p-toluenesulfonic acid (p-TSA) or decylbenzene sulfonic acid (DBSA), the PEDOT/SiO2 composite became conductive. The product was characterized by FTIR spectroscopy and the core-shell structure was confirmed through the TEM images. The electrical properties were analyzed by UV-vis absorbance and four-point probe measurement. DBSA is shown as the better dopants with the molar ratio (DBSA/EDOT) of 0.2 at the reaction time of 48 hours. The maximum coating percentage is 63 wt% under the optimal operation conditions at 40 o C and 280 bar. The conductivity is tuned up to 6.6×10 -2 S/cm after the coating process.