Interrelation between swelling, mechanical constraints and reaction–diffusion processes in molecular responsive hydrogels

Jonášová, Eleonóra Parelius; Stokke, Bjørn Torger; Prot, Victorien

doi:10.1039/d1sm01445e

Cited by 4 publications

(3 citation statements)

References 49 publications

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“…The reaction-diffusion (RD) process is a common phenomenon throughout nature which induced ordered structure on the length scale from microscopic to macroscopic [17][18][19]. When the inorganic ions diffused through a gel and reacted with the other oppositely charge inorganic ions, mobile colloidal precipitates were formed (illustrated in Figure 1a).…”

Section: Introductionmentioning

confidence: 99%

Reaction–Diffusion Process for Hydrogels with a Tailored Layer Structure

Wang

et al. 2023

Processes

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The architecture of hydrogel composites results in not only synergistic property enhancement but also superior functionality. The reaction–diffusion (RD) process is acommon phenomenon throughout nature which induced ordered structure on a length scale from microscopic to macroscopic. Different from commonly used inorganic salts or oppositely charged nanoparticles for the RD process, a modified RD process was used for layered chitosan hydrogel (L-CH) and layered magnetic chitosan hydrogel (L-MCH). During the modified RD process reported in this paper, the protonated chitosan (CS-NH3+) with iron ions (Fe3+ and Fe2+) was used as an inner-reactant and hydroxide ion (-OH−) was used as an out-reactant. The protonated chitosan (CS-NH3+) not only played the role of an inner-reactant but also the reaction medium which controlled the diffusion behavior of the out-reactant (-OH−). A series of ordered layers were constructed and the ordered layers were parallel with the longitudinal axis. The layer width of L-CH and L-MCH can be tailored by varying interval time T. The mean layer width of L-MCH increased from 50 ± 5.8 μm to 90 ± 6.4 μm when the interval time T increased from 2 min to 5 min. The tailored layer structure of L-CH and L-MCH obeyed the time law and spacing law, which declared that the L-CH and L-MCH were constructed via the reaction–diffusion process. We also show that the tailored layer structure endows hydrogel with enhanced mechanical properties, especially toughness. The yield strength of magnetic chitosan hydrogel was improved significantly (from 95.1 ± 7.6 kPa to 401.7 ± 12.1 kPa, improved by about 4 times) when 10 wt. % magnetite nanoparticles were involved. The enhancement of the mechanical propertieswas due to a physical crosslinking effect of magnetite nanoparticles on chitosan. For L-MCH, the probe displacement reached 28.93 ± 2.6 mm when the rupture occurred, which was as high as 284.7% compared with that of the non-layered hydrogel. The tailor-made hydrogels might be possible for application as a tough implantable scaffold.

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Section: Introductionmentioning

confidence: 99%

Reaction–Diffusion Process for Hydrogels with a Tailored Layer Structure

Wang

et al. 2023

Processes

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“…[ [130][131][132] Radiation crosslinking (1) 60 Co radiation source is extremely radioactive. Improper operation will cause harm to the human body;…”

Section: Chemical Crosslinkingmentioning

confidence: 99%

“…However, due to the three-dimensional grid structure formed by the non-covalent bond connection between the internal molecules, they are generally reversible, and the solution will be restored when heated [131]. Therefore, the mechanical strength of the photosensitive antibacterial complex hydrogels obtained using this method is poor [132].…”

Section: Characteristics Of Photosensitive Antibacterial Complex Hydr...mentioning

confidence: 99%

Controllable Preparation and Research Progress of Photosensitive Antibacterial Complex Hydrogels

Wang

Liu

et al. 2023

Gels

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Hydrogels are materials consisting of a network of hydrophilic polymers. Due to their good biocompatibility and hydrophilicity, they are widely used in biomedicine, food safety, environmental protection, agriculture, and other fields. This paper summarizes the typical complex materials of photocatalysts, photosensitizers, and hydrogels, as week as their antibacterial activities and the basic mechanisms of photothermal and photodynamic effects. In addition, the application of hydrogel-based photoresponsive materials in microbial inactivation is discussed, including the challenges faced in their application. The advantages of photosensitive antibacterial complex hydrogels are highlighted, and their application and research progress in various fields are introduced in detail.

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A phase field solution for modelling hyperelastic material and hydrogel fracture in ABAQUS

Zheng

Huang

Lin

2022

Engineering Fracture Mechanics

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Interrelation between swelling, mechanical constraints and reaction–diffusion processes in molecular responsive hydrogels

Abstract: The net swelling dynamics in molecular responsive hydrogels can be viewed as an integrated effect of discernible processes involving transport of actuating species, reaction with network components like destabilization of...

Cited by 4 publications

References 49 publications

Reaction–Diffusion Process for Hydrogels with a Tailored Layer Structure

Reaction–Diffusion Process for Hydrogels with a Tailored Layer Structure

Controllable Preparation and Research Progress of Photosensitive Antibacterial Complex Hydrogels

A phase field solution for modelling hyperelastic material and hydrogel fracture in ABAQUS

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