Tuning the viscoelastic response of hydrogel scaffolds with covalent and dynamic bonds

Drozdov, Aleksey D.; Christiansen, Jesper de Claville

doi:10.1016/j.jmbbm.2022.105179

Cited by 13 publications

(9 citation statements)

References 88 publications

(105 reference statements)

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“…Each set of data in Figure 1 A,B was fitted separately by using the model discussed in [ 40 ]. The storage

and loss

moduli are given by

…”

Section: Resultsmentioning

confidence: 99%

Mechanical Properties of Alginate Hydrogels Cross-Linked with Multivalent Cations

2023

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Ionically, cross-linked alginate gels have a potential to be used in a wide range of biomedical, environmental and catalytic applications. The study deals with preparation of alginate hydrogels cross-linked with various cations and the analysis of their equilibrium swelling and mechanical properties. It is shown that the type of cations used in the cross-linking process affects the elastic moduli and the equilibrium degree of swelling of the gels. The experimental data in small-amplitude oscillatory tests are fitted with a model that involves two material parameters: the elastic modulus of a polymer network and a measure of its inhomogeneity. The influence of cations on these quantities is studied numerically. It is revealed that the dependence of the elastic modulus of ionically cross-linked alginate gels on their equilibrium degree of swelling differs from that predicted by the conventional theory for covalently cross-linked gels.

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“…Each set of data in Figure 1 A,B was fitted separately by using the model discussed in [ 40 ]. The storage

and loss

moduli are given by

…”

Section: Resultsmentioning

confidence: 99%

Mechanical Properties of Alginate Hydrogels Cross-Linked with Multivalent Cations

2023

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“…(combining energy dissipation and storage mechanism), whilst the LAgNPsOH is solely covalently crosslinked, thus having no reversible physical bonds providing dynamic behavior that can impact and improve the viscoelastic properties. [63] The self-healing or recoverability of the gels was evaluated through rheological measurement conducted at 1 Hz by applying 300% strain, a value outside of the LVR, followed by 1% strain, a value inside of the LVR, for 5 min to monitor gel recovery. Both the organohydrogels demonstrated recoverability in all the evaluated consecutive cycles, whilst the LAlNPsH hydrogel did not show any self-healing ability and only recovered up to 39% of its initial G′ value.…”

Section: Thermal Rheological and Mechanical Performance Of The Variou...mentioning

confidence: 99%

Unlocking the Power of Multicatalytic Synergistic Transformation: toward Environmentally Adaptable Organohydrogel

Afewerki,

Edlund

2023

Advanced Materials

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A sustainable and efficient multicatalytic chemical transformation approach is devised for the development of all‐biobased environmentally adaptable polymers and gels with multifunctional properties. The catalytic system, utilizing Lignin aluminum nanoparticles (AlNPs‐Al3+), synergistically combines multiple catalytic cycles to create robust, mechanically stable, and versatile organohydrogels. Single catalytic cycles alone fail to achieve desired results, highlighting the importance of cooperatively combining different cycles for successful outcomes. The transformation involves free radical crosslinking, reversible quinone‐catechol reactions, and an autocatalytic mechanism, resulting in a dual crosslinking strategy that incorporates both covalent and ionic crosslinking. This approach creates a dynamic gel system with combined energy dissipation and storage mechanisms. The engineered organohydrogels demonstrate vital multifunctionalities such as good thermal stability, self‐healing, and adhesive properties, flame‐retardancy, mechanical resilience and durability, conductivity, viscoelastic properties, environmental adaptability, and resistance to extreme conditions such as freezing and drying. The developed catalytic technology and resulting gels hold significant potential for applications in flexible electronics, energy storage, actuators, and sensors.This article is protected by copyright. All rights reserved

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“…For comparison, observations on the storage and loss moduli at temperature T = 22 • C are presented in Figure 3B. We fitted the experimental data in Figure 3A,B using the model proposed in [39] (https://doi.org/10.3390/polym15143012). The storage, 𝐸 ′ (𝜔) , and loss, 𝐸 ′′ (𝜔) , moduli are given by.…”

Section: The Effects Of Co-solvents On Mechanical Properties Of Organ...mentioning

confidence: 99%

“…We fitted the experimental data in Figure 3A,B using the model proposed in [39,40] . The storage, E (ω), and loss, E (ω), moduli are given by.…”

Section: The Effects Of Co-solvents On Mechanical Properties Of Organ...mentioning

confidence: 99%

The Effect of Temperature on the Mechanical Properties of Alginate Gels in Water/Alcohol Solutions

Malektaj

Drozdov

Christiansen

2023

Gels

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Alginate organohydrogels prepared in water/alcohol mixtures play an important role in electronic and superconductor applications in low-temperature environments. The study deals with the preparation of Ca-alginate organohydrogels and the analysis of their equilibrium swelling and mechanical properties at sub-zero temperatures. It is shown that the equilibrium degree of swelling at room temperature is noticeably affected by the concentration of co-solvents (methanol, ethanol, and 2-propanol) in the mixtures and the number of carbon atoms in the co-solvent molecules. Mechanical properties are studied in small-amplitude oscillatory tests. The data are fitted with a model that involves three material parameters. The influence of temperature is investigated in temperature-sweep oscillatory tests under a cooling-heating program, where a noticeable difference is observed between the storage and loss moduli under cooling and heating (the hysteresis curves). The hysteresis areas are affected by the cooling/heating rate and the number of carbon atoms in the co-solvents.

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Tuning the viscoelastic response of hydrogel scaffolds with covalent and dynamic bonds

Cited by 13 publications

References 88 publications

Mechanical Properties of Alginate Hydrogels Cross-Linked with Multivalent Cations

Mechanical Properties of Alginate Hydrogels Cross-Linked with Multivalent Cations

Unlocking the Power of Multicatalytic Synergistic Transformation: toward Environmentally Adaptable Organohydrogel

The Effect of Temperature on the Mechanical Properties of Alginate Gels in Water/Alcohol Solutions

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