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Dispersion Properties of BaTiO 3 Colloids with Amphoteric Polyelectrolytes
Author(s) -
Hsu KungChung,
Ying KuoLiang,
Chen LungPin,
Yu BangYing,
Wei WenCheng J.
Publication year - 2005
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00112.x
Subject(s) - dispersant , polyelectrolyte , copolymer , zeta potential , adsorption , aqueous solution , chemical engineering , materials science , dispersion (optics) , slurry , methacrylic acid , particle size , sodium polyacrylate , chemistry , polymer , composite material , organic chemistry , nanoparticle , nanotechnology , raw material , physics , engineering , optics
An amphoteric water‐soluble copolymer, i.e., poly(acrylamide/(α‐ N,N ‐dimethyl‐ N ‐acryloyloxyethyl) ammonium ethanate) (PAAM/DAAE), was evaluated as a novel dispersant for aqueous BaTiO 3 (BT) slurries. The dispersing property of this copolymer was examined by means of rheology, sedimentation, particle size, green density, zeta potential, and leached Ba 2+ concentration measurements. The results indicate that PAAM/DAAE could reduce the viscosity of slurries greatly, cause BT particle sizes to shift to smaller values, and make green compacts more consolidated. Compared with a commercial dispersant, ammonium salt of poly(methacrylic acid) (PMAA‐NH 4 ), it is as effective or even better in preparing stabilized suspensions. More importantly, PAAM/DAAE could lessen the leached Ba 2+ concentration. This is related to the adsorption behavior of this copolymer onto BT particles, and the interaction between the adsorbed dispersant and dissolved barium ions.