Evolution of mechanical, optical and electrical properties of self-assembled mesostructured phenolic resins during carbonization

Xinxin Li, Andrew B. Larson, Ling Jiang, Lingyan Song, Todd Prichard, Nikhilesh Chawla, Bryan D. Vogt

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Ordered mesoporous polymer and carbon films are synthesized through the cooperative self-assembly of a phenol-formaldehyde resin with an amphiphilic block copolymer template, Pluronic F127. The processing temperature at which the template is removed and the resin is pyrolyzed dramatically impacts the mechanical, electrical and optical properties of the mesoporous film. There is a substantial increase in the hardness, modulus, conductivity and refractive index of the films as the pyrolysis temperature is increased from 400 to 800 °C. Upon further increasing the temperature to 1000 °C, there is no statistical change in the mechanical properties of the porous film, although the conductivity increases significantly from 18 to 74 S/cm. The modulus and hardness of the near surface are larger compared to the bulk of the film; this difference is more pronounced for the highly conductive films (carbonized at 800 and 1000 °C) and suggests a denser surface, which is consistent with low porosity calculated from ellipsometric porosimetry measurements that are surface sensitive. This work illustrates how the mechanical and electrical properties of mesoporous carbon films change with pyrolysis temperature. These mechanical and electronic properties are critical to the utility of these films in electronic or electrochemical applications.

Original languageEnglish (US)
Pages (from-to)86-93
Number of pages8
JournalMicroporous and Mesoporous Materials
Volume138
Issue number1-3
DOIs
StatePublished - Feb 2011

Fingerprint

phenolic resins
Phenolic resins
carbonization
Carbonization
Electric properties
Optical properties
electrical properties
mechanical properties
optical properties
Mechanical properties
UCON 50-HB-5100
Carbon films
Pyrolysis
Resins
Hardness
Poloxamer
Temperature
Conductive films
resins
pyrolysis

Keywords

  • Carbon
  • Conductivity
  • Hardness
  • Mesoporous film
  • Modulus

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Evolution of mechanical, optical and electrical properties of self-assembled mesostructured phenolic resins during carbonization. / Li, Xinxin; Larson, Andrew B.; Jiang, Ling; Song, Lingyan; Prichard, Todd; Chawla, Nikhilesh; Vogt, Bryan D.

In: Microporous and Mesoporous Materials, Vol. 138, No. 1-3, 02.2011, p. 86-93.

Research output: Contribution to journalArticle

Li, Xinxin ; Larson, Andrew B. ; Jiang, Ling ; Song, Lingyan ; Prichard, Todd ; Chawla, Nikhilesh ; Vogt, Bryan D. / Evolution of mechanical, optical and electrical properties of self-assembled mesostructured phenolic resins during carbonization. In: Microporous and Mesoporous Materials. 2011 ; Vol. 138, No. 1-3. pp. 86-93.
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