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Characterization of the microstructure of hydrazone crosslinked polysaccharide-based hydrogels through rheological and diffusion studies

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Characterization of the microstructure of hydrazone crosslinked polysaccharide-based hydrogels through rheological and diffusion studies. / Karvinen, Jennika; Ihalainen, Teemu O.; Rebelo Calejo, Teresa; Jönkkäri, Ilari; Kellomäki, Minna.

In: Materials Science and Engineering C: Materials for Biological Applications, Vol. 94, 2019, p. 1056-1066.

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@article{0fd89d2eeb5441b7850735f15212f828,
title = "Characterization of the microstructure of hydrazone crosslinked polysaccharide-based hydrogels through rheological and diffusion studies",
abstract = "Microstructure plays an essential role in the control of hydrogel properties. It is also an important factor when cells or drugs are encapsulated inside the hydrogel. In this work, the microstructures of hydrazone crosslinked hyaluronan-, alginate- and gellan gum-based hydrogels were evaluated thoroughly for the first time by using rheology- and diffusion (fluorescence recovery after photobleaching, FRAP)-based methods. The effect of gel parameters on the viscoelastic and diffusion properties of hydrogels, and further on their structural parameters (mesh size, average molecular weight of the polymer chain between neighboring crosslinks, crosslinking density) are shown. Results further show that diffusivity decreased when larger dextran sizes were used, which were equivalent to the mesh sizes of hydrogels (15 nm to 47 nm) evaluated by the rheological method. This mesh size range allows the transportation of smaller molecules, but also peptides and most of the proteins. A correlation between the storage modulus and the structural parameters was also shown. Overall, hydrazone crosslinking offers an easy way to produce polysaccharide-based hydrogels with variable microstructures by altering the gel parameters.",
author = "Jennika Karvinen and Ihalainen, {Teemu O.} and {Rebelo Calejo}, Teresa and Ilari J{\"o}nkk{\"a}ri and Minna Kellom{\"a}ki",
note = "EXT={"}Ihalainen, Teemu O.{"}",
year = "2019",
doi = "10.1016/j.msec.2018.10.048",
language = "English",
volume = "94",
pages = "1056--1066",
journal = "Materials Science and Engineering C: Materials for Biological Applications",
issn = "0928-4931",
publisher = "Elsevier",

}

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TY - JOUR

T1 - Characterization of the microstructure of hydrazone crosslinked polysaccharide-based hydrogels through rheological and diffusion studies

AU - Karvinen, Jennika

AU - Ihalainen, Teemu O.

AU - Rebelo Calejo, Teresa

AU - Jönkkäri, Ilari

AU - Kellomäki, Minna

N1 - EXT="Ihalainen, Teemu O."

PY - 2019

Y1 - 2019

N2 - Microstructure plays an essential role in the control of hydrogel properties. It is also an important factor when cells or drugs are encapsulated inside the hydrogel. In this work, the microstructures of hydrazone crosslinked hyaluronan-, alginate- and gellan gum-based hydrogels were evaluated thoroughly for the first time by using rheology- and diffusion (fluorescence recovery after photobleaching, FRAP)-based methods. The effect of gel parameters on the viscoelastic and diffusion properties of hydrogels, and further on their structural parameters (mesh size, average molecular weight of the polymer chain between neighboring crosslinks, crosslinking density) are shown. Results further show that diffusivity decreased when larger dextran sizes were used, which were equivalent to the mesh sizes of hydrogels (15 nm to 47 nm) evaluated by the rheological method. This mesh size range allows the transportation of smaller molecules, but also peptides and most of the proteins. A correlation between the storage modulus and the structural parameters was also shown. Overall, hydrazone crosslinking offers an easy way to produce polysaccharide-based hydrogels with variable microstructures by altering the gel parameters.

AB - Microstructure plays an essential role in the control of hydrogel properties. It is also an important factor when cells or drugs are encapsulated inside the hydrogel. In this work, the microstructures of hydrazone crosslinked hyaluronan-, alginate- and gellan gum-based hydrogels were evaluated thoroughly for the first time by using rheology- and diffusion (fluorescence recovery after photobleaching, FRAP)-based methods. The effect of gel parameters on the viscoelastic and diffusion properties of hydrogels, and further on their structural parameters (mesh size, average molecular weight of the polymer chain between neighboring crosslinks, crosslinking density) are shown. Results further show that diffusivity decreased when larger dextran sizes were used, which were equivalent to the mesh sizes of hydrogels (15 nm to 47 nm) evaluated by the rheological method. This mesh size range allows the transportation of smaller molecules, but also peptides and most of the proteins. A correlation between the storage modulus and the structural parameters was also shown. Overall, hydrazone crosslinking offers an easy way to produce polysaccharide-based hydrogels with variable microstructures by altering the gel parameters.

U2 - 10.1016/j.msec.2018.10.048

DO - 10.1016/j.msec.2018.10.048

M3 - Article

VL - 94

SP - 1056

EP - 1066

JO - Materials Science and Engineering C: Materials for Biological Applications

JF - Materials Science and Engineering C: Materials for Biological Applications

SN - 0928-4931

ER -