Molecular Level Ceramic/Polymer Composites. 2. Synthesis of Polymer-Trapped Silica and Titania Nanoclusters

Manish Nandi, Jeanine A. Conklin, Ayusman Sen, Lawrence Salvati

Research output: Contribution to journalArticle

253 Citations (Scopus)

Abstract

The concept of “site isolation” was used to synthesize SiO2 and TiO2 nanoclusters trapped in polyimide matrices. M(OEt)4 (M = Si, Ti) was added to polyamic solutions derived from 4, 4′-oxydianiline and either 1,2,4,5-benzenetetracarboxylic acid dianhydride or 3, 3′,4,4′-benzophenonetetracarboxylic acid dianhydride. Following thermal curing, polyimide films containing a homogeneous dispersion of SiO2 or TiO2 particles were obtained. Oxide nanoclusters (size <1-1.5 nm) were present in polyimide films containing 12% TiO2 and up to 32% SiO2. However, 1-μm particles were present at 42% SiO2 content. Two-micrometer particles were formed even in 12% SiO2 containing films when poly(diethoxysiloxane), rather than Si(OEt)4, was used as the oxide precursor.

Original languageEnglish (US)
Pages (from-to)201-206
Number of pages6
JournalChemistry of Materials
Volume3
Issue number1
DOIs
StatePublished - Jan 1 1991

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Nanoclusters
Polyimides
Silicon Dioxide
Polymers
Titanium
Silica
Oxides
Composite materials
Acids
Curing
titanium dioxide

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

Cite this

Nandi, Manish ; Conklin, Jeanine A. ; Sen, Ayusman ; Salvati, Lawrence. / Molecular Level Ceramic/Polymer Composites. 2. Synthesis of Polymer-Trapped Silica and Titania Nanoclusters. In: Chemistry of Materials. 1991 ; Vol. 3, No. 1. pp. 201-206.
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abstract = "The concept of “site isolation” was used to synthesize SiO2 and TiO2 nanoclusters trapped in polyimide matrices. M(OEt)4 (M = Si, Ti) was added to polyamic solutions derived from 4, 4′-oxydianiline and either 1,2,4,5-benzenetetracarboxylic acid dianhydride or 3, 3′,4,4′-benzophenonetetracarboxylic acid dianhydride. Following thermal curing, polyimide films containing a homogeneous dispersion of SiO2 or TiO2 particles were obtained. Oxide nanoclusters (size <1-1.5 nm) were present in polyimide films containing 12{\%} TiO2 and up to 32{\%} SiO2. However, 1-μm particles were present at 42{\%} SiO2 content. Two-micrometer particles were formed even in 12{\%} SiO2 containing films when poly(diethoxysiloxane), rather than Si(OEt)4, was used as the oxide precursor.",
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Molecular Level Ceramic/Polymer Composites. 2. Synthesis of Polymer-Trapped Silica and Titania Nanoclusters. / Nandi, Manish; Conklin, Jeanine A.; Sen, Ayusman; Salvati, Lawrence.

In: Chemistry of Materials, Vol. 3, No. 1, 01.01.1991, p. 201-206.

Research output: Contribution to journalArticle

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