Strengthening silica aerogels with surface initiated ATRP cross-linked poly(methyl methacrylate)

Dylan J. Boday, Douglas A Loy

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Abstract Silica aerogels were strengthened by surface initiated atom transfer radical polymerization (SI-ATRP) of methyl methacylate (MMA) and ethylene glycol dimethacrylate (EGDMA) from ATRP initiators grafted to the gel before supercritical drying. Tetramethoxysilane (TMOS) was copolymerized in methanol with 2.67 mol% of the ATRP initiator, 3-(triethoxysilyl)propyl-2-bromo-2-methylpropanoate, to afford gels. After replacing the methanol with toluene and adding copper catalyst, MMA and EGDMA (1:1), highly cross-linked poly(MMA-co-EGDMA) was grown from the surface of the aggregated particles making up the gel. After supercritical carbon dioxide drying, the result was highly porous poly(MMA-co-EGDMA)-silica aerogel composites that were significantly stronger than silica aerogels or poly(MMA)-silica aerogel composites of the same density.

Original languageEnglish (US)
Article number17469
Pages (from-to)114-119
Number of pages6
JournalJournal of Non-Crystalline Solids
Volume427
DOIs
StatePublished - Aug 3 2015

ASJC Scopus subject areas

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

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