Effects of Salts on Crystallization Kinetics and Rheological Behavior of Concentrated α,α-Trehalose Solutions

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The effect of addition of CaCl2 · 2H2O and MgCl2 · 6H2O on crystallization kinetics and the rheological behavior of a 70% trehalose solution was studied by polarized light microscopy and dynamic oscillatory rheometry. Salts caused a delay on nucleation with induction times for crystallization longer...

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Autores principales: Cerdeira, M., Puppo, M.C., Martini, S., Herrera, M.L.
Formato: JOUR
Materias:
Crystallization kinetics
Divalent cations
Polarized light microscopy
Rheology
Trehalose
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00221147_v68_n9_p2644_Cerdeira
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00221147_v68_n9_p2644_Cerdeira
record_format dspace
spelling todo:paper_00221147_v68_n9_p2644_Cerdeira2023-10-03T14:27:11Z Effects of Salts on Crystallization Kinetics and Rheological Behavior of Concentrated α,α-Trehalose Solutions Cerdeira, M. Puppo, M.C. Martini, S. Herrera, M.L. Crystallization kinetics Divalent cations Polarized light microscopy Rheology Trehalose The effect of addition of CaCl2 · 2H2O and MgCl2 · 6H2O on crystallization kinetics and the rheological behavior of a 70% trehalose solution was studied by polarized light microscopy and dynamic oscillatory rheometry. Salts caused a delay on nucleation with induction times for crystallization longer for Mg2+ than for Ca2+. Divalent cations were incorporated into crystals, changing the growth of certain faces preferentially, which resulted in changes in morphology. Addition of CaCl2 · 2H2O in a high salt/trehalose molar ratio dramatically increased complex modulus (G*), indicating a stronger viscoelastic behavior. A gel-like structure was formed when Ca2+ was added to trehalose solution. The behavior of Mg 2+/trehalose solutions cannot be considered viscoelastic in nature but as a fluid-like system. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00221147_v68_n9_p2644_Cerdeira
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Crystallization kinetics
Divalent cations
Polarized light microscopy
Rheology
Trehalose
spellingShingle Crystallization kinetics
Divalent cations
Polarized light microscopy
Rheology
Trehalose
Cerdeira, M.
Puppo, M.C.
Martini, S.
Herrera, M.L.
Effects of Salts on Crystallization Kinetics and Rheological Behavior of Concentrated α,α-Trehalose Solutions
topic_facet Crystallization kinetics
Divalent cations
Polarized light microscopy
Rheology
Trehalose
description The effect of addition of CaCl2 · 2H2O and MgCl2 · 6H2O on crystallization kinetics and the rheological behavior of a 70% trehalose solution was studied by polarized light microscopy and dynamic oscillatory rheometry. Salts caused a delay on nucleation with induction times for crystallization longer for Mg2+ than for Ca2+. Divalent cations were incorporated into crystals, changing the growth of certain faces preferentially, which resulted in changes in morphology. Addition of CaCl2 · 2H2O in a high salt/trehalose molar ratio dramatically increased complex modulus (G*), indicating a stronger viscoelastic behavior. A gel-like structure was formed when Ca2+ was added to trehalose solution. The behavior of Mg 2+/trehalose solutions cannot be considered viscoelastic in nature but as a fluid-like system.
format JOUR
author Cerdeira, M.
Puppo, M.C.
Martini, S.
Herrera, M.L.
author_facet Cerdeira, M.
Puppo, M.C.
Martini, S.
Herrera, M.L.
author_sort Cerdeira, M.
title Effects of Salts on Crystallization Kinetics and Rheological Behavior of Concentrated α,α-Trehalose Solutions
title_short Effects of Salts on Crystallization Kinetics and Rheological Behavior of Concentrated α,α-Trehalose Solutions
title_full Effects of Salts on Crystallization Kinetics and Rheological Behavior of Concentrated α,α-Trehalose Solutions
title_fullStr Effects of Salts on Crystallization Kinetics and Rheological Behavior of Concentrated α,α-Trehalose Solutions
title_full_unstemmed Effects of Salts on Crystallization Kinetics and Rheological Behavior of Concentrated α,α-Trehalose Solutions
title_sort effects of salts on crystallization kinetics and rheological behavior of concentrated α,α-trehalose solutions
url http://hdl.handle.net/20.500.12110/paper_00221147_v68_n9_p2644_Cerdeira
work_keys_str_mv AT cerdeiram effectsofsaltsoncrystallizationkineticsandrheologicalbehaviorofconcentratedaatrehalosesolutions
AT puppomc effectsofsaltsoncrystallizationkineticsandrheologicalbehaviorofconcentratedaatrehalosesolutions
AT martinis effectsofsaltsoncrystallizationkineticsandrheologicalbehaviorofconcentratedaatrehalosesolutions
AT herreraml effectsofsaltsoncrystallizationkineticsandrheologicalbehaviorofconcentratedaatrehalosesolutions
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