Aqueous latex/ceramic nanoparticle dispersions: Colloidal stability and coating properties

Jiakuan Sun; Bhaskar V. Velamakanni; William W. Gerberich; Lorraine F. Francis

doi:10.1016/j.jcis.2004.08.014

Aqueous latex/ceramic nanoparticle dispersions: Colloidal stability and coating properties

Jiakuan Sun, Bhaskar V. Velamakanni, William W. Gerberich, Lorraine F. Francis

Chemical Engineering and Materials Science

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

115 Scopus citations

Abstract

The effect of pH on the colloidal stability of aqueous dispersions containing antimony-doped tin oxide (ATO) or indium tin oxide (ITO) nanoparticles and poly(vinyl acetate-acrylic) copolymer (PVAc-co-acrylic) latex particles was investigated using experimental observations and Derjiaguin, Landau, Verwey and Overbeek (DLVO) theory. The microstructure, electrical properties and optical properties of composite coatings prepared from various dispersions were also studied. Zeta potential measurements revealed that the isoelectric point (IEP) of ATO nanoparticles was below pH 2.0, that of ITO nanoparticles was at pH ∼ 6.0 and that of PVAc-co-acrylic latex was at pH ∼ 2.0. ATO/PVAc-co-acrylic dispersions prepared at pH 3 were stable, but those prepared at pH 1.5 formed aggregates, which settled quickly with time. DLVO theory predictions are in accord with these results. Stable ITO/PVAc-co-acrylic dispersions are obtained at a pH of 3.0 and 11.0, but dispersions are not stable at a pH of 6.0, the IEP of ITO. At a pH of 3.0, DLVO results predict attraction between ITO particles and latex particles. Dispersion pH affected the microstructures and properties of ATO (or ITO)/PVAc-co-acrylic coatings. Suspensions that formed aggregates produced coatings with lower percolation thresholds and lower transparencies than those produced from stable suspensions.

Original language	English (US)
Pages (from-to)	387-399
Number of pages	13
Journal	Journal of Colloid And Interface Science
Volume	280
Issue number	2
DOIs	https://doi.org/10.1016/j.jcis.2004.08.014
State	Published - Dec 15 2004

Bibliographical note

Funding Information:
The authors thank the Coating Process Fundamentals Program of the University of Minnesota for financial support. J. Sun thanks Dr. Lian Tan for assistance with the liquid conductivity measurements and Ms. Lijun Zu for help with the transmittance spectra collection.

Keywords

Antimony-doped tin oxide
Colloidal stability
DLVO theory
Indium tin oxide
Latices
Microstructure
Percolation
Transparent conductive coatings

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10.1016/j.jcis.2004.08.014

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@article{21927ed8640840c99fb9906d68049921,

title = "Aqueous latex/ceramic nanoparticle dispersions: Colloidal stability and coating properties",

abstract = "The effect of pH on the colloidal stability of aqueous dispersions containing antimony-doped tin oxide (ATO) or indium tin oxide (ITO) nanoparticles and poly(vinyl acetate-acrylic) copolymer (PVAc-co-acrylic) latex particles was investigated using experimental observations and Derjiaguin, Landau, Verwey and Overbeek (DLVO) theory. The microstructure, electrical properties and optical properties of composite coatings prepared from various dispersions were also studied. Zeta potential measurements revealed that the isoelectric point (IEP) of ATO nanoparticles was below pH 2.0, that of ITO nanoparticles was at pH ∼ 6.0 and that of PVAc-co-acrylic latex was at pH ∼ 2.0. ATO/PVAc-co-acrylic dispersions prepared at pH 3 were stable, but those prepared at pH 1.5 formed aggregates, which settled quickly with time. DLVO theory predictions are in accord with these results. Stable ITO/PVAc-co-acrylic dispersions are obtained at a pH of 3.0 and 11.0, but dispersions are not stable at a pH of 6.0, the IEP of ITO. At a pH of 3.0, DLVO results predict attraction between ITO particles and latex particles. Dispersion pH affected the microstructures and properties of ATO (or ITO)/PVAc-co-acrylic coatings. Suspensions that formed aggregates produced coatings with lower percolation thresholds and lower transparencies than those produced from stable suspensions.",

keywords = "Antimony-doped tin oxide, Colloidal stability, DLVO theory, Indium tin oxide, Latices, Microstructure, Percolation, Transparent conductive coatings",

author = "Jiakuan Sun and Velamakanni, {Bhaskar V.} and Gerberich, {William W.} and Francis, {Lorraine F.}",

note = "Funding Information: The authors thank the Coating Process Fundamentals Program of the University of Minnesota for financial support. J. Sun thanks Dr. Lian Tan for assistance with the liquid conductivity measurements and Ms. Lijun Zu for help with the transmittance spectra collection.",

year = "2004",

month = dec,

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doi = "10.1016/j.jcis.2004.08.014",

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T1 - Aqueous latex/ceramic nanoparticle dispersions

T2 - Colloidal stability and coating properties

AU - Sun, Jiakuan

AU - Velamakanni, Bhaskar V.

AU - Gerberich, William W.

AU - Francis, Lorraine F.

N1 - Funding Information: The authors thank the Coating Process Fundamentals Program of the University of Minnesota for financial support. J. Sun thanks Dr. Lian Tan for assistance with the liquid conductivity measurements and Ms. Lijun Zu for help with the transmittance spectra collection.

PY - 2004/12/15

Y1 - 2004/12/15

N2 - The effect of pH on the colloidal stability of aqueous dispersions containing antimony-doped tin oxide (ATO) or indium tin oxide (ITO) nanoparticles and poly(vinyl acetate-acrylic) copolymer (PVAc-co-acrylic) latex particles was investigated using experimental observations and Derjiaguin, Landau, Verwey and Overbeek (DLVO) theory. The microstructure, electrical properties and optical properties of composite coatings prepared from various dispersions were also studied. Zeta potential measurements revealed that the isoelectric point (IEP) of ATO nanoparticles was below pH 2.0, that of ITO nanoparticles was at pH ∼ 6.0 and that of PVAc-co-acrylic latex was at pH ∼ 2.0. ATO/PVAc-co-acrylic dispersions prepared at pH 3 were stable, but those prepared at pH 1.5 formed aggregates, which settled quickly with time. DLVO theory predictions are in accord with these results. Stable ITO/PVAc-co-acrylic dispersions are obtained at a pH of 3.0 and 11.0, but dispersions are not stable at a pH of 6.0, the IEP of ITO. At a pH of 3.0, DLVO results predict attraction between ITO particles and latex particles. Dispersion pH affected the microstructures and properties of ATO (or ITO)/PVAc-co-acrylic coatings. Suspensions that formed aggregates produced coatings with lower percolation thresholds and lower transparencies than those produced from stable suspensions.

AB - The effect of pH on the colloidal stability of aqueous dispersions containing antimony-doped tin oxide (ATO) or indium tin oxide (ITO) nanoparticles and poly(vinyl acetate-acrylic) copolymer (PVAc-co-acrylic) latex particles was investigated using experimental observations and Derjiaguin, Landau, Verwey and Overbeek (DLVO) theory. The microstructure, electrical properties and optical properties of composite coatings prepared from various dispersions were also studied. Zeta potential measurements revealed that the isoelectric point (IEP) of ATO nanoparticles was below pH 2.0, that of ITO nanoparticles was at pH ∼ 6.0 and that of PVAc-co-acrylic latex was at pH ∼ 2.0. ATO/PVAc-co-acrylic dispersions prepared at pH 3 were stable, but those prepared at pH 1.5 formed aggregates, which settled quickly with time. DLVO theory predictions are in accord with these results. Stable ITO/PVAc-co-acrylic dispersions are obtained at a pH of 3.0 and 11.0, but dispersions are not stable at a pH of 6.0, the IEP of ITO. At a pH of 3.0, DLVO results predict attraction between ITO particles and latex particles. Dispersion pH affected the microstructures and properties of ATO (or ITO)/PVAc-co-acrylic coatings. Suspensions that formed aggregates produced coatings with lower percolation thresholds and lower transparencies than those produced from stable suspensions.

KW - Antimony-doped tin oxide

KW - Colloidal stability

KW - DLVO theory

KW - Indium tin oxide

KW - Latices

KW - Microstructure

KW - Percolation

KW - Transparent conductive coatings

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DO - 10.1016/j.jcis.2004.08.014

M3 - Article

C2 - 15533412

AN - SCOPUS:7944234515

SN - 0021-9797

VL - 280

SP - 387

EP - 399

JO - Journal of Colloid And Interface Science

JF - Journal of Colloid And Interface Science

IS - 2

ER -

Aqueous latex/ceramic nanoparticle dispersions: Colloidal stability and coating properties

Abstract

Bibliographical note

Keywords

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