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

Dylan J. Boday, Douglas A Loy

Research output: Contribution to journalArticle

8 Citations (Scopus)

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

Fingerprint

Aerogels
Atom transfer radical polymerization
aerogels
Polymethyl Methacrylate
Ethylene glycol
Polymethyl methacrylates
polymethyl methacrylate
Silicon Dioxide
glycols
ethylene
Silica
silicon dioxide
Gels
gels
initiators
drying
Methanol
Drying
methyl alcohol
composite materials

ASJC Scopus subject areas

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

Cite this

Strengthening silica aerogels with surface initiated ATRP cross-linked poly(methyl methacrylate). / Boday, Dylan J.; Loy, Douglas A.

In: Journal of Non-Crystalline Solids, Vol. 427, 17469, 03.08.2015, p. 114-119.

Research output: Contribution to journalArticle

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N2 - 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.

AB - 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.

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