The nature of nonfreezing water in carbohydrate polymers

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The nature of nonfreezing water in carbohydrate polymers

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Publication Article, peer reviewed scientific
Title The nature of nonfreezing water in carbohydrate polymers
Author Kocherbitov, Vitaly
Research Centre Biofilms - Research Center for Biointerfaces
Date 2016
English abstract
In an aqueous environment, carbohydrate polymers are surrounded by hydration shells consisting of water molecules that are sometimes called “bound”. When polymer solutions are subjected to low temperatures, a part of water turns into ice, another part remains in the biopolymer phase and is called “nonfreezing water”. Thermodynamic analysis of water freezing shows that the amount of non-freezing water does not reflect the amount of bound water, neither can it be used as a measure of strength of polymer-water interactions. Upon deep cooling, crystallization of water should desiccate polymers more than is observed in experiment. The reason for existence of non-freezing water is an interplay between the crystallization of water and the glass transition in biopolymers that prevents dehydration.
DOI https://doi.org/10.1016/j.carbpol.2016.04.119 (link to publisher's fulltext.)
Publisher Elsevier
Host/Issue Carbohydrate Polymers;
Volume 150
ISSN 0144-8617
Pages 353-358
Language eng (iso)
Subject Hydration
Biopolymer
nonfreezing water
non-freezing water
freezable water
nonfreezable water
non-freezable water
thermodynamics
water activity
DSC
heat capacity
water sorption
ice
Natural Sciences
Research Subject Categories::NATURAL SCIENCES
Handle http://hdl.handle.net/2043/21840 Permalink to this page
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