Dispersant-binder interactions in aqueous silicon nitride suspensions

Ungyu Paik, Vincent A. Hackley, Hae Weon Lee

Research output: Contribution to journalArticle

87 Citations (Scopus)

Abstract

The interaction of dispersant and binder on the surface of particles was studied to identify the effect of these additives on aqueous ceramic powder processing. Poly(methacrylic acid) (PMAA) and poly(vinyl alcohol) (PVA) were used as the dispersant and binder, respectively. The adsorption isotherms of the organic additives on silicon nitride were determined. The adsorption of PMAA was differentiated from PVA in the mixed additive system via ultraviolet spectroscopy. The electrokinetic behavior of silicon nitride was measured by using an electrokinetic sonic amplitude analyzer. As the PMAA concentration increased, the isoelectric point (pHiep) of silicon nitride shifted from pH 6.7±0.1 to acidic pH values. The magnitude of the shift depended on the surface coverage of PMAA. PVA did not affect the pHiep of suspensions but did cause a moderate decrease in the near-surface potential. Finally, the rheological behavior of silicon nitride suspensions was measured to assess the stability of particles against flocculation in aqueous media; this behavior was subsequently correlated with the electrokinetic and adsorption isotherm data.

Original languageEnglish
Pages (from-to)833-840
Number of pages8
JournalJournal of the American Ceramic Society
Volume82
Issue number4
DOIs
StatePublished - 1999 Jan 1

Fingerprint

dispersant
Silicon nitride
silicon
Binders
Suspensions
alcohol
Alcohols
Acids
acid
adsorption
Adsorption isotherms
isotherm
Flocculation
Surface potential
Ultraviolet spectroscopy
flocculation
ceramics
Powders
spectroscopy
Adsorption

Cite this

Paik, Ungyu ; Hackley, Vincent A. ; Lee, Hae Weon. / Dispersant-binder interactions in aqueous silicon nitride suspensions. In: Journal of the American Ceramic Society. 1999 ; Vol. 82, No. 4. pp. 833-840.
@article{5b18d0a6bc6744d494c15c3da5c92043,
title = "Dispersant-binder interactions in aqueous silicon nitride suspensions",
abstract = "The interaction of dispersant and binder on the surface of particles was studied to identify the effect of these additives on aqueous ceramic powder processing. Poly(methacrylic acid) (PMAA) and poly(vinyl alcohol) (PVA) were used as the dispersant and binder, respectively. The adsorption isotherms of the organic additives on silicon nitride were determined. The adsorption of PMAA was differentiated from PVA in the mixed additive system via ultraviolet spectroscopy. The electrokinetic behavior of silicon nitride was measured by using an electrokinetic sonic amplitude analyzer. As the PMAA concentration increased, the isoelectric point (pHiep) of silicon nitride shifted from pH 6.7±0.1 to acidic pH values. The magnitude of the shift depended on the surface coverage of PMAA. PVA did not affect the pHiep of suspensions but did cause a moderate decrease in the near-surface potential. Finally, the rheological behavior of silicon nitride suspensions was measured to assess the stability of particles against flocculation in aqueous media; this behavior was subsequently correlated with the electrokinetic and adsorption isotherm data.",
author = "Ungyu Paik and Hackley, {Vincent A.} and Lee, {Hae Weon}",
year = "1999",
month = "1",
day = "1",
doi = "10.1111/j.1151-2916.1999.tb01843.x",
language = "English",
volume = "82",
pages = "833--840",
journal = "Journal of the American Ceramic Society",
issn = "0002-7820",
number = "4",

}

Dispersant-binder interactions in aqueous silicon nitride suspensions. / Paik, Ungyu; Hackley, Vincent A.; Lee, Hae Weon.

In: Journal of the American Ceramic Society, Vol. 82, No. 4, 01.01.1999, p. 833-840.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Dispersant-binder interactions in aqueous silicon nitride suspensions

AU - Paik, Ungyu

AU - Hackley, Vincent A.

AU - Lee, Hae Weon

PY - 1999/1/1

Y1 - 1999/1/1

N2 - The interaction of dispersant and binder on the surface of particles was studied to identify the effect of these additives on aqueous ceramic powder processing. Poly(methacrylic acid) (PMAA) and poly(vinyl alcohol) (PVA) were used as the dispersant and binder, respectively. The adsorption isotherms of the organic additives on silicon nitride were determined. The adsorption of PMAA was differentiated from PVA in the mixed additive system via ultraviolet spectroscopy. The electrokinetic behavior of silicon nitride was measured by using an electrokinetic sonic amplitude analyzer. As the PMAA concentration increased, the isoelectric point (pHiep) of silicon nitride shifted from pH 6.7±0.1 to acidic pH values. The magnitude of the shift depended on the surface coverage of PMAA. PVA did not affect the pHiep of suspensions but did cause a moderate decrease in the near-surface potential. Finally, the rheological behavior of silicon nitride suspensions was measured to assess the stability of particles against flocculation in aqueous media; this behavior was subsequently correlated with the electrokinetic and adsorption isotherm data.

AB - The interaction of dispersant and binder on the surface of particles was studied to identify the effect of these additives on aqueous ceramic powder processing. Poly(methacrylic acid) (PMAA) and poly(vinyl alcohol) (PVA) were used as the dispersant and binder, respectively. The adsorption isotherms of the organic additives on silicon nitride were determined. The adsorption of PMAA was differentiated from PVA in the mixed additive system via ultraviolet spectroscopy. The electrokinetic behavior of silicon nitride was measured by using an electrokinetic sonic amplitude analyzer. As the PMAA concentration increased, the isoelectric point (pHiep) of silicon nitride shifted from pH 6.7±0.1 to acidic pH values. The magnitude of the shift depended on the surface coverage of PMAA. PVA did not affect the pHiep of suspensions but did cause a moderate decrease in the near-surface potential. Finally, the rheological behavior of silicon nitride suspensions was measured to assess the stability of particles against flocculation in aqueous media; this behavior was subsequently correlated with the electrokinetic and adsorption isotherm data.

UR - http://www.scopus.com/inward/record.url?scp=0032641086&partnerID=8YFLogxK

U2 - 10.1111/j.1151-2916.1999.tb01843.x

DO - 10.1111/j.1151-2916.1999.tb01843.x

M3 - Article

AN - SCOPUS:0032641086

VL - 82

SP - 833

EP - 840

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

SN - 0002-7820

IS - 4

ER -