Role of water in sucrose crystallization1Presented at the Second International Meeting of the Portuguese Carbohydrate Chemistry Group.1

Autor:	J. Genotelle, M. Mathlouthi
Rok vydání:	1998
Předmět:	Supersaturation Polymers and Plastics Chemistry Diffusion Organic Chemistry Crystal growth medicine.disease law.invention Crystal Viscosity Crystallography Chemical engineering law Materials Chemistry medicine Water of crystallization Dehydration Crystallization
Zdroj:	Carbohydrate Polymers. 37:335-342
ISSN:	0144-8617
DOI:	10.1016/s0144-8617(98)00079-4
Popis:	The rate of sucrose crystallization in supersaturated solutions is known to include at least two steps: the diffusion of sucrose from the bulk solution to the thin layer at the interface crystal/solution and the incorporation of sucrose molecules in the crystal after the release of their hydration water. Among the energy barriers encountered in the `hurdle race' of the crystallization process, viscosity seems to be a minor hurdle and the disassociation of hydration water a major one. We will attempt to show that the dehydration of sucrose molecules prior to their incorporation into the crystal plays an important part in the crystallization process and propose to conceive the mechanism of crystal growth as mainly based on the release of water molecules and their diffusion in the bulk solution rather than a migration of sucrose from the solution to the crystal.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::469164b692437aa813c2ce1cba89beb9 https://doi.org/10.1016/s0144-8617(98)00079-4 Zobrazit plný text záznamu Full Text from ScienceDirect