Abstract
AbstractImpurities may have a marked effect on crystal nucleation and growth. To further understand the role of impurities, the crystallization (solubility, nucleation, growth) of succinic acid in water in the presence of surfactants such as polyethylene glycol sorbitan monooleate (Tween 80), cetyltrimethylammonium bromide (CTAB) and sodium dodecylbenzenesulfonate (SDBS) was investigated experimentally. The presence of CTAB, SDBS or Tween 80 had little influence on succinic acid solubility but did slow crystallization kinetics. The surfactant monomer in solution, not micelles, proved to play the primary role affecting nucleation. The nucleation inhibition by surfactant was analyzed on the base of a two‐step nucleation process: (1) the inhibition on the formation and growth of succinic acid nanodroplets and (2) the influence on succinic acid single nucleus (SASN) in secondary nucleation. SASN may play important role in secondary nucleation, although further work is necessary to conform this. The length of the surfactant hydrocarbon chain was found to affect crystal habit development.
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