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Title: Reduced de-doping and enhanced electrical conductivity of polyaniline filled phenol-divinylbenzene composite for potential lightning strike protection application

Abstract

In this study, phenolic resin was mixed with a cross-linking agent divinylbenzene (DVB) to prepare a polyaniline-based electrically-conductive thermosetting polymer composite. It has been shown that this Phenol-DVB mixture can undergo cationic polymerization in the presence of the dodecylbenzene sulfonic acid (DBSA)-doped polyaniline (PANI). Composites with different weight ratios of phenolic resin and DVB were mixed with a fixed weight of DBSA-PANI (i.e. 30 wt. %). Increasing the phenol content in the resin system was found to improve the electrical conductivity of the composite to almost 2700%. This improvement has been assigned to the reduced de-doping of polyaniline in phenol-DVB resin. Active sites of phenol effectively attached to the β carbon of DVB and reduced the proton subtracting species of DVB, leading to reduced de-doping of PANI. This behavior was studied through various characterization techniques including differential scanning calorimetry (DSC), FT-IR spectroscopy and Scanning Electron Microscopy (SEM). Electrical conductivity measurement, mechanical properties, and in-situ electrical conductivity measurements were performed to find the optimized properties of the composite. Optimized composites prepared with the composition of 30 wt. % DBSA-PANI and 70 wt. % of phenol-DVB (50 wt. % each), have shown electrical conductivity of 0.20 S/cm and a flexural modulus ofmore » 2.1 GPa, which is a significant improvement in the flexural properties of polymer based-thermosetting composites with similar electrical conductivity. Lastly, this material can be a potential candidate for the lightning strike protection of fiber reinforced plastics.« less

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3]; ORCiD logo [4];  [2]
  1. Univ. of Tokyo (Japan); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Univ. of Tokyo (Japan)
  3. Metallurgical Engineering & Material Science, Indian Institute of Technology Bombay, Powai, Mumbai (India)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Advanced Manufacturing Office (EE-5A)
OSTI Identifier:
1495952
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Synthetic Metals
Additional Journal Information:
Journal Volume: 249; Journal Issue: C; Journal ID: ISSN 0379-6779
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Polyaniline; De-doping; Phenol-DVB; Conductive composite; Lightning strike protection

Citation Formats

Kumar, Vipin, Zhou, Yu, Shambharkar, Gatha, Kunc, Vlastimil, and Yokozeki, Tomohiro. Reduced de-doping and enhanced electrical conductivity of polyaniline filled phenol-divinylbenzene composite for potential lightning strike protection application. United States: N. p., 2019. Web. doi:10.1016/j.synthmet.2019.02.003.
Kumar, Vipin, Zhou, Yu, Shambharkar, Gatha, Kunc, Vlastimil, & Yokozeki, Tomohiro. Reduced de-doping and enhanced electrical conductivity of polyaniline filled phenol-divinylbenzene composite for potential lightning strike protection application. United States. doi:10.1016/j.synthmet.2019.02.003.
Kumar, Vipin, Zhou, Yu, Shambharkar, Gatha, Kunc, Vlastimil, and Yokozeki, Tomohiro. Sat . "Reduced de-doping and enhanced electrical conductivity of polyaniline filled phenol-divinylbenzene composite for potential lightning strike protection application". United States. doi:10.1016/j.synthmet.2019.02.003.
@article{osti_1495952,
title = {Reduced de-doping and enhanced electrical conductivity of polyaniline filled phenol-divinylbenzene composite for potential lightning strike protection application},
author = {Kumar, Vipin and Zhou, Yu and Shambharkar, Gatha and Kunc, Vlastimil and Yokozeki, Tomohiro},
abstractNote = {In this study, phenolic resin was mixed with a cross-linking agent divinylbenzene (DVB) to prepare a polyaniline-based electrically-conductive thermosetting polymer composite. It has been shown that this Phenol-DVB mixture can undergo cationic polymerization in the presence of the dodecylbenzene sulfonic acid (DBSA)-doped polyaniline (PANI). Composites with different weight ratios of phenolic resin and DVB were mixed with a fixed weight of DBSA-PANI (i.e. 30 wt. %). Increasing the phenol content in the resin system was found to improve the electrical conductivity of the composite to almost 2700%. This improvement has been assigned to the reduced de-doping of polyaniline in phenol-DVB resin. Active sites of phenol effectively attached to the β carbon of DVB and reduced the proton subtracting species of DVB, leading to reduced de-doping of PANI. This behavior was studied through various characterization techniques including differential scanning calorimetry (DSC), FT-IR spectroscopy and Scanning Electron Microscopy (SEM). Electrical conductivity measurement, mechanical properties, and in-situ electrical conductivity measurements were performed to find the optimized properties of the composite. Optimized composites prepared with the composition of 30 wt. % DBSA-PANI and 70 wt. % of phenol-DVB (50 wt. % each), have shown electrical conductivity of 0.20 S/cm and a flexural modulus of 2.1 GPa, which is a significant improvement in the flexural properties of polymer based-thermosetting composites with similar electrical conductivity. Lastly, this material can be a potential candidate for the lightning strike protection of fiber reinforced plastics.},
doi = {10.1016/j.synthmet.2019.02.003},
journal = {Synthetic Metals},
number = C,
volume = 249,
place = {United States},
year = {2019},
month = {2}
}

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This content will become publicly available on February 16, 2020
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