Reinforcing hydrogels with <i>in situ</i> formed amorphous CaCO<sub>3</sub>

Du, Huachuan; Yuan, Tianyu; Zhao, Ran; Hirsch, Matteo; Kessler, Michael R.; Amstad, Esther

doi:10.1039/d2bm00322h

Cited by 9 publications

(8 citation statements)

References 63 publications

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“…We assigned the change in appearance to the formation of randomly arranged and oriented magnesium carbonate particles whose diameter is larger than that of MgO nanoparticles. Hence, these particles scatter light to a large extent, thereby rendering the mineralized hydrogel opaque . As expected, the pH of the hydrogels decreased to about 7.5 at the end of the reaction (Figure c ).…”

Section: Resultssupporting

confidence: 64%

“…Similar results were also reported in a previous study where Du et al used the modified gas-diffusion mineralization method to mineralize PAM hydrogels with CaCO 3 . These results suggest that the formed CaCO 3 crystals increase the PAM hydrogel’s cross-linking density, significantly stiffening it . Taken together, these results suggest that the CO 2 mineralization further reinforces the hybrid hydrogels, which makes them withstand more severe deformations before being structurally affected.…”

Section: Resultsmentioning

confidence: 71%

“…Hence, these particles scatter light to a large extent, thereby rendering the mineralized hydrogel opaque. 36 As expected, the pH of the hydrogels decreased to about 7.5 at the end of the reaction (Figure 6c). This is because CO 2 dissolves in water to form carbonic acid during this CO 2 mineralization process, thereby lowering the pH of the hydrogels.…”

Section: ■ Results and Discussionmentioning

confidence: 93%

“…These results suggest that the formed CaCO 3 crystals increase the PAM hydrogel's crosslinking density, significantly stiffening it. 36 Taken together, these results suggest that the CO 2 mineralization further reinforces the hybrid hydrogels, which makes them withstand more severe deformations before being structurally affected.…”

Section: Mg(oh)mentioning

confidence: 99%

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Construction of CO₂ Absorption Protein Hydrogels Using MgO Nanoparticles as Cross-Linkers

Zhang,

Zang

et al. 2023

ACS Sustainable Chem. Eng.

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CO2 mineralization by colloidal nanoclusters of MgO under mild conditions to reduce its levels in the atmosphere remains challenged. On the other hand, protein hydrogels are generally limited for a broader usage basin due to their poor mechanical properties. Inspired by biomineralization in nature, herein, we fabricated a new type of hybrid hydrogel consisting of β-lactoglobulin (βLG) amyloid fibrils and MgO nanoparticles as solid cross-linking agents. Interestingly, except for their self-recovery property and high thermal stability, the fabricated hybrid hydrogels showed two orders of magnitude improved strength compared to known divalent ion-induced amyloid fibril gels. Notably, the MgO nanoparticles endow the hybrid gels with the ability of absorption CO2 and convert it into hydromagnesite. Quantitatively, per gram of the hybrid hydrogels formed by βLG cross-linked with 40 mM MgO nanoparticles can absorb 2.8 mmol of CO2. Consequently, the yield stress of the obtained CO2 mineralization hydrogels was markedly improved by the formed hydromagnesite as fillers. This proof-of-concept study demonstrates that the fabricated MgO-βLG hydrogels could serve as a CO2 absorbent for practical applications.

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Section: Resultssupporting

confidence: 64%

Section: Resultsmentioning

confidence: 71%

Section: ■ Results and Discussionmentioning

confidence: 93%

Section: Mg(oh)mentioning

confidence: 99%

See 2 more Smart Citations

Construction of CO₂ Absorption Protein Hydrogels Using MgO Nanoparticles as Cross-Linkers

Zhang,

Zang

et al. 2023

ACS Sustainable Chem. Eng.

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“…To the best of our knowledge, the development of inhomogeneous hydrogels has received limited attention due to the challenges of tuning the mechanical properties of the gel network from the innermost region to the topmost surface. Generally, the mechanical strength of hydrogels can be increased when introducing crystals or particles into the gel network, − and the mechanical properties can be tuned by changing the amount of crystals or particles in the network. However, once insoluble crystals or particles such as CaCO 3 , SiO 2 , and Fe 3 O 4 are entrapped within the hydrogel network, it becomes challenging to alter their content.…”

Section: Introductionmentioning

confidence: 99%

Cartilage-Inspired Inhomogeneous Salt-Hydrogel for Hydrated Drag-Reducing and Strain Sensing

Yan,

Shi,

Liu

et al. 2023

ACS Appl. Mater. Interfaces

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Articular cartilages exhibit load-bearing capacity and durability due to their inhomogeneous structure. Inspired by this unique structure, a tough and inhomogeneous salt-hydrogel was developed by trapping sodium acetate (NaAc) crystals in polyacrylamide (PAM) polymer networks and then partially redissolving the NaAc crystals. The compressive and tensile stresses of the salt-hydrogel increase significantly by more than 20 times when oversaturated Ac– and Na+ are introduced into the gel network. Such an enhancement in mechanical strength is primarily attributed to the formation of NaAc crystals within the gel network. Further investigations reveal that the mechanical strength of the salt-hydrogel is temperature-dependent as the NaAc crystals gradually redissolve in the gel network with increasing temperature. Furthermore, redissolving NaAc crystals in an aqueous solution can yield an inhomogeneous salt-hydrogel. The topmost soft surface of the salt-hydrogel offers hydration lubrication, while the inhomogeneous network confers load-bearing capacity and durability. Compared to regular hydrogels, the inhomogeneous salt-hydrogel surface can realize drag reduction and remain smooth without damage after the friction tests. Moreover, a salt-hydrogel coating is also fabricated to visually demonstrate its drag-reducing property. In addition, this salt-hydrogel possesses conductivity and can be utilized in the development of inhomogeneous salt-hydrogel fibers (diameter = 438 ± 7 μm) for strain detection. The produced salt-hydrogel fiber exhibits excellent durability and reproducibility as a strain sensor, capable of detecting both small strains (e.g., 1%) and large strains (e.g., 40%). This work provides fundamental insights into developing hydrogels with an inhomogeneous network and explores their potential applications (e.g., hydrated drag-reducing, strain sensing).

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Tough Hydrogels for Load‐Bearing Applications

Petelinšek,

Mommer

2024

Advanced Science

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Tough hydrogels have emerged as a promising class of materials to target load‐bearing applications, where the material has to resist multiple cycles of extreme mechanical impact. A variety of chemical interactions and network architectures are used to enhance the mechanical properties and fracture mechanics of hydrogels making them stiffer and tougher. In recent years, the mechanical properties of tough, high‐performance hydrogels have been benchmarked, however, this is often incomplete as important variables like water content are largely ignored. In this review, the aim is to clarify the reported mechanical properties of state‐of‐the‐art tough hydrogels by providing a comprehensive library of fracture and mechanical property data. First, common methods for mechanical characterization of such high‐performance hydrogels are introduced. Then, various modes of energy dissipation to obtain tough hydrogels are discussed and used to categorize the individual datasets helping to asses the material's (fracture) mechanical properties. Finally, current applications are considered, tough high‐performance hydrogels are compared with existing materials, and promising future opportunities are discussed.

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Reinforcing hydrogels with in situ formed amorphous CaCO₃

Abstract: We introduce hydrogels within which we form CaCO3in situ to achieve a homogeneous distribution of the mineral. We demonstrate that the mechanical reinforcement is much higher if CaCO3 is amorphous compared to any of its crystalline polymorphs.

Cited by 9 publications

References 63 publications

Construction of CO₂ Absorption Protein Hydrogels Using MgO Nanoparticles as Cross-Linkers

Construction of CO₂ Absorption Protein Hydrogels Using MgO Nanoparticles as Cross-Linkers

Cartilage-Inspired Inhomogeneous Salt-Hydrogel for Hydrated Drag-Reducing and Strain Sensing

Tough Hydrogels for Load‐Bearing Applications

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Reinforcing hydrogels with in situ formed amorphous CaCO3

Abstract: We introduce hydrogels within which we form CaCO3in situ to achieve a homogeneous distribution of the mineral. We demonstrate that the mechanical reinforcement is much higher if CaCO3 is amorphous compared to any of its crystalline polymorphs.

Cited by 9 publications

References 63 publications

Construction of CO2 Absorption Protein Hydrogels Using MgO Nanoparticles as Cross-Linkers

Construction of CO2 Absorption Protein Hydrogels Using MgO Nanoparticles as Cross-Linkers

Cartilage-Inspired Inhomogeneous Salt-Hydrogel for Hydrated Drag-Reducing and Strain Sensing

Tough Hydrogels for Load‐Bearing Applications

Contact Info

Product

Resources

About

Reinforcing hydrogels with in situ formed amorphous CaCO₃

Construction of CO₂ Absorption Protein Hydrogels Using MgO Nanoparticles as Cross-Linkers

Construction of CO₂ Absorption Protein Hydrogels Using MgO Nanoparticles as Cross-Linkers