Dynamic spring-back behavior in evaporative drying of polymethylsilsesquioxane monolithic gels for low-density transparent thermal superinsulators

Gen Hayase, Kazuyoshi Kanamori, Ayaka Maeno, Hironori Kaji, Kazuki Nakanishi

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Ambient pressure drying of polymethylsilsesquioxane gels via dynamic shrinkage-reexpansion has been investigated for preparation of aerogel-like xerogels and their application to thermal superinsulators. An extended aging of wet gels in aqueous solution containing precursor-derived species is found to be crucial in obtaining crack-free, monolithic xerogels with sufficiently low thermal conductivity (13.7 mW m- 1 K- 1) at bulk density of 0.140 g cm- 3 (porosity - 90%).

Original languageEnglish
Pages (from-to)115-119
Number of pages5
JournalJournal of Non-Crystalline Solids
Volume434
DOIs
Publication statusPublished - 2016 Feb 15

Keywords

  • Aerogels
  • Ambient pressure drying
  • Sol-gel
  • Spring-back behavior
  • Thermal insulators
  • Xerogels

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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