Synthesis of Multiwalled Carbon Nanotube-Reinforced Polyborosiloxane Nanocomposites with Mechanically Adaptive and Self-Healing Capabilities for Flexible Conductors

Tongfei Wu, Biqiong Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)

Abstract

Intrinsic self-healing polyborosiloxane (PBS) and its multiwalled carbon nanotube (MWCNT)-reinforced nanocomposites were synthesized from hydroxyl terminated poly(dimethylsiloxane) (PDMS) and boric acid at room temperature. The formation of Si-O-B moiety in PBS was confirmed by Fourier transform infrared spectroscopy. PBS and its MWCNT-reinforced nanocomposites were found possessing water- or methanol-activated mechanically adaptive behaviors; the compressive modulus decreased substantially when exposed to water or methanol vapor and recovered their high value after the stimulus was removed. The compressive modulus was reduced by 76%, 86%, 90%, and 83% for neat PBS and its nanocomposites containing 3.0, 6.2, and 13.3 wt % MWCNTs, respectively, in water vapor, and the modulus reduction activated by methanol vapor was greater than by water vapor. MWCNTs at higher contents acted as a continuous electrical channel in PBS offering electrical conductivity, which was up to 1.21 S/cm for the nanocomposite containing 13.3 wt % MWCNTs. The MWCNT-reinforced PBS nanocomposites also showed excellent mechanically and electrically self-healing properties, moldability, and adhesion to PDMS elastomer substrate. These properties enabled a straightforward fabrication of self-repairing MWCNT/PBS electronic circuits on PDMS elastomer substrates.

Original languageEnglish
Pages (from-to)24071-24078
JournalACS Applied Materials and Interfaces
Volume8
Issue number36
Early online date17 Aug 2016
DOIs
Publication statusPublished - 14 Sep 2016
Externally publishedYes

Keywords

  • adaptive properties
  • conducting nanocomposites
  • multiwalled carbon nanotubes
  • polyborosiloxane
  • self-healing

ASJC Scopus subject areas

  • Materials Science(all)

Fingerprint

Dive into the research topics of 'Synthesis of Multiwalled Carbon Nanotube-Reinforced Polyborosiloxane Nanocomposites with Mechanically Adaptive and Self-Healing Capabilities for Flexible Conductors'. Together they form a unique fingerprint.

Cite this