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Dispersion of nanoscale BaTiO 3 suspensions by a combination of chemical and mechanical grinding/mixing processes
Author(s) -
Ying KuoLiang,
Hsieh TsungEong
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.24935
Subject(s) - dispersant , materials science , dispersion (optics) , chemical engineering , barium titanate , colloid , composite material , aqueous solution , ball mill , nanometre , mixing (physics) , apparent viscosity , viscosity , ceramic , chemistry , organic chemistry , optics , physics , engineering , quantum mechanics
The colloidal stability of aqueous nanometer‐ and micrometer‐scale barium titanate (BaTiO 3 ) utilizing poly (methacrylic acid) (PMAA‐Na) and polyacrylamide/(α‐ N,N ‐dimethyl‐ N ‐acryloyloxyethyl)ammonium ethanate (PDAAE) was investigated. In addition to chemical dispersants, the effects of mechanical milling using either conventional ball milling or nanogrinding/‐mixing on the dispersion of BaTiO 3 suspensions were also studied. Characterization of the particle size distribution ( d 50 ), viscosity, and morphology of BaTiO 3 particles in the suspensions revealed that a sole chemical dispersant or mechanical milling was insufficient to achieve nanometer‐scale dispersion. The best dispersion results were obtained with a combination of PMAA‐Na dispersant and nanogrinding/‐mixing, which could provide sufficient electronic repulsive force and shear force to disperse the 80‐nm BaTiO 3 powders uniformly in the aqueous suspension. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007