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Polymorphism, Size and Shape Control of Calcium Carbonate Crystals in the Presence of a Polyelectrolyte
Author(s) -
Sonobe Yuko,
Watamura Hiroto,
Hirasawa Izumi
Publication year - 2015
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201400731
Subject(s) - polyacrylic acid , calcium carbonate , polyelectrolyte , supersaturation , crystallization , particle size , polymorphism (computer science) , chemical engineering , chemistry , dispersity , particle size distribution , mineralogy , materials science , polymer chemistry , polymer , organic chemistry , biochemistry , genotype , engineering , gene
The effects of the presence of a polyelectrolyte on the polymorphism and particle size and shape of calcium carbonate crystals during reactive crystallization were investigated. Crystals were created by the single‐jet reaction crystallization method. When polyacrylic acid (PAA) was added, the polymorphism and particle size and shape were different for each molecular weight of PAA and each experimental method. When sodium carboxymethylcellulose was added, the polymorph became different from those made by adding PAA and the particle sizes and shapes were different for each concentration. As a result, it is suggested that the method to achieve supersaturation, such as type of feeding, feed rate, kinds of polyelectrolyte and their concentration, may affect the polymorphism and particle size and shape of calcium carbonate.