Porosity in hexylene-bridged polysilsesquioxanes. Effects of monomer concentration

Brigitta M. Baugher, Douglas A. Loy, S. Prabakar, Roger A. Assink, Kenneth J. Shea, Henry Oviatt

Research output: Contribution to journalConference article

12 Scopus citations

Abstract

Hexylene-bridged polysilsesquioxanes can be prepared as mesoporous or non-porous xerogels simply by switching from basic to acidic polymerization conditions. In this study, we looked at the effect of monomer concentration on porosity of hexylene-bridged xerogels prepared under acidic and basic conditions. 1, 6-Hexylene-bridged polysilsesquioxanes were prepared by sol-gel polymerizations of 1, 6-bis(triethoxysilyl)hexane 1 with concentrations between 0.1 to 1.2 M in ethanol. Gelation times ranged from seconds for 1.2 M concentration to months for 0.2 M. The gels were processed into xerogels by an aqueous work-up and the dry gels characterized by scanning electron microscopy (SEM), solid state 13C and 29Si CP MAS NMR spectroscopy, and gas sorption porosimetry.

Original languageEnglish (US)
Pages (from-to)253-259
Number of pages7
JournalMaterials Research Society Symposium - Proceedings
Volume371
StatePublished - Jan 1 1995
Externally publishedYes
EventProceedings of the 1994 MRS Fall Meeting - Boston, MA, USA
Duration: Nov 28 1994Nov 30 1994

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Porosity in hexylene-bridged polysilsesquioxanes. Effects of monomer concentration'. Together they form a unique fingerprint.

  • Cite this

    Baugher, B. M., Loy, D. A., Prabakar, S., Assink, R. A., Shea, K. J., & Oviatt, H. (1995). Porosity in hexylene-bridged polysilsesquioxanes. Effects of monomer concentration. Materials Research Society Symposium - Proceedings, 371, 253-259.