Influence of Metal Ions on the Melting Temperature, Modulus, and Gelation Time of Gelatin Gels: Specific Ion Effects on Hydrogel Properties

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Influence of Metal Ions on the Melting Temperature, Modulus, and Gelation Time of Gelatin Gels : Specific Ion Effects on Hydrogel Properties. / Andersen, Amanda; Ibsen, Casper Jon Steenberg; Birkedal, Henrik.

In: Journal of Physical Chemistry B, Vol. 122, No. 43, 12.10.2018, p. 10062-10067.

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@article{c39c927641f049008c0544fa16c36e75,
title = "Influence of Metal Ions on the Melting Temperature, Modulus, and Gelation Time of Gelatin Gels: Specific Ion Effects on Hydrogel Properties",
abstract = "The impact of ions on hydrogel strength is not well understood, in particular with regards to specific ion effects for cations. Herein, we find that divalent and monovalent cations in most cases reduce the modulus and melting temperature while increasing the gelation time of gelatin hydrogels. This behavior is in contrast to the well-known stiffening effect of trivalent metals. The melting temperature, the logarithm of the gelation time, and the logarithm of the amplitude of the complex modulus were found to follow a power law dependence on ionic strength: kIx. The power law exponent, x, was found to be universal within the groups of monovalent and divalent cations. The prefactor k depended linearly on the ionic radius, which was used as a proxy for ion polarizability. The slope of this linear dependence was different for monovalent and divalent cations.",
author = "Amanda Andersen and Ibsen, {Casper Jon Steenberg} and Henrik Birkedal",
year = "2018",
month = "10",
day = "12",
doi = "10.1021/acs.jpcb.8b07658",
language = "English",
volume = "122",
pages = "10062--10067",
journal = "Journal of Physical Chemistry Part B: Condensed Matter, Materials, Surfaces, Interfaces & Biophysical",
issn = "1520-6106",
publisher = "American Chemical Society",
number = "43",

}

RIS

TY - JOUR

T1 - Influence of Metal Ions on the Melting Temperature, Modulus, and Gelation Time of Gelatin Gels

T2 - Specific Ion Effects on Hydrogel Properties

AU - Andersen, Amanda

AU - Ibsen, Casper Jon Steenberg

AU - Birkedal, Henrik

PY - 2018/10/12

Y1 - 2018/10/12

N2 - The impact of ions on hydrogel strength is not well understood, in particular with regards to specific ion effects for cations. Herein, we find that divalent and monovalent cations in most cases reduce the modulus and melting temperature while increasing the gelation time of gelatin hydrogels. This behavior is in contrast to the well-known stiffening effect of trivalent metals. The melting temperature, the logarithm of the gelation time, and the logarithm of the amplitude of the complex modulus were found to follow a power law dependence on ionic strength: kIx. The power law exponent, x, was found to be universal within the groups of monovalent and divalent cations. The prefactor k depended linearly on the ionic radius, which was used as a proxy for ion polarizability. The slope of this linear dependence was different for monovalent and divalent cations.

AB - The impact of ions on hydrogel strength is not well understood, in particular with regards to specific ion effects for cations. Herein, we find that divalent and monovalent cations in most cases reduce the modulus and melting temperature while increasing the gelation time of gelatin hydrogels. This behavior is in contrast to the well-known stiffening effect of trivalent metals. The melting temperature, the logarithm of the gelation time, and the logarithm of the amplitude of the complex modulus were found to follow a power law dependence on ionic strength: kIx. The power law exponent, x, was found to be universal within the groups of monovalent and divalent cations. The prefactor k depended linearly on the ionic radius, which was used as a proxy for ion polarizability. The slope of this linear dependence was different for monovalent and divalent cations.

UR - http://www.scopus.com/inward/record.url?scp=85055680438&partnerID=8YFLogxK

U2 - 10.1021/acs.jpcb.8b07658

DO - 10.1021/acs.jpcb.8b07658

M3 - Journal article

VL - 122

SP - 10062

EP - 10067

JO - Journal of Physical Chemistry Part B: Condensed Matter, Materials, Surfaces, Interfaces & Biophysical

JF - Journal of Physical Chemistry Part B: Condensed Matter, Materials, Surfaces, Interfaces & Biophysical

SN - 1520-6106

IS - 43

ER -