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Crystallization from Concentrated Sucrose Solutions

  • J. M. V. Blanshard
  • A. H. Muhr
  • A. Gough
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 302)

Abstract

When concentrated aqueous solutions of sucrose are cooled, ice or sucrose crystals separate, depending on the concentration and temperature. The state diagram of the sucrose-water system describes both the equilibrium and non-equilibrium behaviour. A detailed account is given of the effect of sucrose concentration and various, principally polysaccharide, stabilizers on the processes of homogeneous and heterogeneous nucleation, as well as the kinetics of crystal growth. Increasing concentrations of sucrose reduce the diffusion coefficient of water molecules and the linear growth velocity of ice crystals. Polysaccharide stabilizers have relatively little effect until incipient gelation occurs. Thereafter, there is a gross change in crystal form and growth rate. A careful analysis of the impact of sucrose concentration on the rate of ice crystal growth has not permitted satisfactory matching of theoretical predictions with actual behaviour.

Recent studies of the rate of growth of sucrose crystals in sucrose glasses of varying water contents are recorded. There is no simple relationship between the moisture content (in the 2–12 w/w% H2O range) and the rate of growth of the sucrose crystals.

Keywords

Sucrose Solution Sucrose Concentration Crystal Growth Rate Vary Water Content Sucrose Crystal 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1991

Authors and Affiliations

  • J. M. V. Blanshard
    • 1
  • A. H. Muhr
    • 1
  • A. Gough
    • 1
  1. 1.Food Science Laboratories, Department of Applied Biochemistry and Food ScienceNottingham UniversityUK

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