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

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

doi:10.1021/cm00013a040

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

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

Chemistry

Research output: Contribution to journal › Article › peer-review

267 Scopus citations

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 language	English (US)
Pages (from-to)	201-206
Number of pages	6
Journal	Chemistry of Materials
Volume	3
Issue number	1
DOIs	https://doi.org/10.1021/cm00013a040
State	Published - Jan 1 1991

All Science Journal Classification (ASJC) codes

General Chemistry
General Chemical Engineering
Materials Chemistry

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10.1021/cm00013a040

Cite this

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

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.",

author = "Manish Nandi and Conklin, \{Jeanine A.\} and Ayusman Sen and Lawrence Salvati",

year = "1991",

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T1 - Molecular Level Ceramic/Polymer Composites. 2. Synthesis of Polymer-Trapped Silica and Titania Nanoclusters

AU - Nandi, Manish

AU - Conklin, Jeanine A.

AU - Sen, Ayusman

AU - Salvati, Lawrence

PY - 1991/1/1

Y1 - 1991/1/1

N2 - 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.

AB - 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

Abstract

All Science Journal Classification (ASJC) codes

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