TY - JOUR
T1 - Poly(acrylic acid)-Poly(ethylene oxide) Comb Polymer Effects on BaTiO 3 Nanoparticle Suspension Stability
AU - Kirby, Glen H.
AU - Harris, Daniel J.
AU - Li, Qi
AU - Lewis, Jennifer A.
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2004/2
Y1 - 2004/2
N2 - We have studied the effects of poly(acrylic acid)-poly(ethylene oxide) (PAA-PEO) comb polymers on the stability of aqueous BaTiO 3, nanoparticle suspensions over a wide pH range in the presence and absence of mono- and divalent salt species. The comb polymer architecture consists of charge-neutral PEO teeth attached at random intervals along an ionizable PAA backhone. Potentiometric titrations, light scattering, and turbidity measurements were conducted on pure PAA and PAA-PEO solutions to assess their degree of ionization, radius of hydration, and stability. Adsorption isotherm and rheological measurements were conducted on BaTiO 3 nanoparticle suspensions to determine the effectiveness of both PAA and PAA-PEO dispersants. Our observations indicate that the presence of PEO teeth effectively shield the underlying PAA backhone from ion interactions, e.g., counterion-screening or ion-bridging effects, thereby allowing PAA-PEO dispersants to impart stability to BaTiO 3 nanoparticle suspensions over a wide range of pH, ionic strength, and ion valency conditions where pure PAA fails.
AB - We have studied the effects of poly(acrylic acid)-poly(ethylene oxide) (PAA-PEO) comb polymers on the stability of aqueous BaTiO 3, nanoparticle suspensions over a wide pH range in the presence and absence of mono- and divalent salt species. The comb polymer architecture consists of charge-neutral PEO teeth attached at random intervals along an ionizable PAA backhone. Potentiometric titrations, light scattering, and turbidity measurements were conducted on pure PAA and PAA-PEO solutions to assess their degree of ionization, radius of hydration, and stability. Adsorption isotherm and rheological measurements were conducted on BaTiO 3 nanoparticle suspensions to determine the effectiveness of both PAA and PAA-PEO dispersants. Our observations indicate that the presence of PEO teeth effectively shield the underlying PAA backhone from ion interactions, e.g., counterion-screening or ion-bridging effects, thereby allowing PAA-PEO dispersants to impart stability to BaTiO 3 nanoparticle suspensions over a wide range of pH, ionic strength, and ion valency conditions where pure PAA fails.
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U2 - 10.1111/j.1551-2916.2004.00181.x
DO - 10.1111/j.1551-2916.2004.00181.x
M3 - Article
AN - SCOPUS:1542335606
SN - 0002-7820
VL - 87
SP - 181
EP - 186
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 2
ER -