Formation of ordered macropores and templated nanopores in silica sol-gel system incorporated with EO-PO-EO triblock copolymer

Yosuke Sato, Kazuki Nakanishi, Kazuyuki Hirao, Hiroshi Jinnai, Mitsuhiro Shibayama, Yuri B. Melnichenko, George D. Wignall

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

Silica gels with well-defined co-continuous gel skeletons and pore in the micrometer range have been prepared using a poly(ethylene oxide-propylene oxide-ethylene oxide (EO-PO-EO)) triblock copolymer. Being essentially independent of the micrometer-range structure, the mesopore exhibited narrow distributions around an identical median size and its volume was correlated well to the concentration of triblock copolymer. Small-angle neutron scattering of wet, dried and heat-treated gels revealed that the mesopore structure had been already templated at the sol-gel transition, and was preserved or even enhanced during the removal of solvent and carbonaceous constituents.

Original languageEnglish
Pages (from-to)117-122
Number of pages6
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume187-188
DOIs
Publication statusPublished - 2001 Aug 31

Keywords

  • Phase separation
  • SANS
  • Self-organization
  • Silica
  • Sol-gel

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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