Synthesis and swelling behavior of a fully degradable physical cross-linked high strength hydrogel

Li, Liang; Guo, Jixiang; Xiong, Ruiying

doi:10.1016/j.polymertesting.2020.106982

Cited by 13 publications

(9 citation statements)

References 16 publications

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“…At a temperature lower than 25 °C, the hydrogel shrinks slightly for the first 5 days, but there is no significant mass change after reaching a new equilibrium. On the contrary, when the environment temperature is higher than 25 °C, the swelling ratio of the hydrogel increases with the increase of temperature since the higher temperature accelerates the disassociation of hydrophobic association and electrostatic interactions and facilitates the water entering the hydrogel network. But even in hot water of 65 °C, the equilibrium swelling ratio of the hydrogel is only 150%, indicating good hot water resistance.…”

Section: Resultsmentioning

confidence: 99%

Tough, Anti-Swelling Supramolecular Hydrogels Mediated by Surfactant–Polymer Interactions for Underwater Sensors

Dong

Huang

et al. 2022

ACS Appl. Mater. Interfaces

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It is a great challenge for traditional hydrogel-based sensors to be effective underwater due to unsatisfactory water resistance and insufficient wet adhesion. Herein, a tough supramolecular hydrogel aiming at underwater sensing is prepared by the modification of hydrophilic poly(acrylic acid) (PAA) with a small amount of hydrophobic lauryl methacrylate (LMA) in the presence of high concentrations of the cationic surfactant cetyltrimethylammonium bromide (CTAB). Owing to the synergistic effects of the electrostatic interactions and hydrophobic associations of CTAB with the P(AA-co-LMA) copolymer, the hydrogel with a water content of approximately 58.5 wt % demonstrates outstanding anti-swelling feature, superior tensile strength (≈1.6 MPa), large stretchability (>900%), rapid room-temperature self-recovery (≈3 min at 100% strain), and robust wet adhesion to diverse substrates. Moreover, the strain sensor based on the hydrogel displays keen sensitivity in a sensing range of 0–900% (gauge factor is 0.42, 3.44, 5.44, and 7.39 in the strain range of 0–100, 100–300, 300–500, and 500–900%, respectively) and pronounced stability both in air and underwater. Additionally, the hydrogel can be easily recycled by dissolving in anhydrous ethanol. This work provides a facile strategy to fabricate eco-friendly, tough supramolecular hydrogels for underwater sensing.

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Section: Resultsmentioning

confidence: 99%

Tough, Anti-Swelling Supramolecular Hydrogels Mediated by Surfactant–Polymer Interactions for Underwater Sensors

Dong

Huang

et al. 2022

ACS Appl. Mater. Interfaces

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“…When the low load (1 N) is applied, the applied pressure will lead to the deformation of the material, and the friction resistance generated by the increase in the contact area becomes dominant . As the load is increased to 4 N, the hydrated molecules are aligned in a narrow space, the hydrated molecular layer is more orderly, and the uniformity and stability of the lubricating film are improved . Moreover, the amount of free water extruded inside the hydrogel network will increase accordingly, providing a good lubricating effect on the friction pair .…”

Section: Resultsmentioning

confidence: 99%

“…Nevertheless, the study on the water content (Figure d) and contact angle (Figure e) verify that GE is hydrophilic and has good water binding, which is helpful to a more stable hydrated layer formed on the surface of the hybrid hydrogel (Figure d). In this case, with the introduction of GE, the hydrated layer could maintain a fluid-like response and lower friction dissipation under shear conditions, thus reducing the COF during sliding. ,, …”

Section: Resultsmentioning

confidence: 99%

“…64 Moreover, the amount of free water extruded inside the hydrogel network will increase accordingly, providing a good lubricating effect on the friction pair. 64 Therefore, better friction-reducing performance is observed under a medium load. These results show that the normal load also has an obvious influence on the COF of the hybrid hydrogel.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Low-Friction Hybrid Hydrogel with Excellent Mechanical Properties for Simulating Articular Cartilage Movement

et al. 2023

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Hydrogels, which can withstand large deformations and have stable chemical properties, are considered a potential material for cartilage repair. However, hydrogels still face some challenges regarding their mechanical properties, tribological behavior, and biocompatibility. Thus, we synthesized a hybrid hydrogel by means of chemical cross-linking and transesterification using glycerol ethoxylate (GE) and zwitterionic polysulfobetaine methacrylate (PSBMA) as raw materials. The hybrid hydrogel showed excellent compressive stress at approximately 3.50 MPa and low loss factors (0.023−0.049). Moreover, because GE has good water binding properties, helping to form a stable hydration layer and maintain low energy dissipation, a low friction coefficient (μ ≈ 0.028) was obtained with the "soft−soft contact mode" of a hydrogel hemisphere and hydrogel disc under reciprocating motion. In vitro cytotoxicity, skin sensitization, and irritation reaction tests were carried out to show good biocompatibility of the GE-PSBMA hybrid hydrogel. In this study, a hybrid hydrogel with no potential cytotoxicity, strong compressive capacity, and excellent lubricity was obtained to provide a potential alternative for developing polymer hybrids, as well as demonstrating an idea for the application of hybrid hydrogels in cartilage replacement.

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“…The equilibrium swelling degree of the hydrogel was an important parameter. The change in the equilibrium swelling degree represents a macroscopic manifestation of the conformational changes of the macromolecular chain [41]. The equilibrium swelling degree of the hydrogel was used to reveal the relationship of the microscopic interaction state and the polymer chain conformation.…”

Section: Swelling Ratio Measurementmentioning

confidence: 99%

Combined Strategy of Wound Healing Using Thermo-Sensitive PNIPAAm Hydrogel and CS/PVA Membranes: Development and In-Vivo Evaluation

Chu

Chai

et al. 2022

Polymers

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Past studies have shown that the hot spring effect can promote wound healing. Mild thermal stimulation and metal ions can promote angiogenesis. In this study, the hot spring effect was simulated by thermosensitive PNIPAAm hydrogel loaded with copper sulfide nanoparticles. Heat stimulation could be generated through near-infrared irradiation, and copper ions solution could be pulsed. On the other hand, the CS/PVA nanofiber membrane was attached to the bottom of the hydrogel to simulate the extracellular matrix structure, thus improving the wound healing ability. The CS/PVA nanofiber membrane was prepared by electrospinning, and the appropriate prescription and process parameters were determined. The nanofiber membrane has uniform pore size, good water absorption and permeability. The poor mechanical properties of PNIPAAm hydrogel were improved by adding inorganic clay. The temperature of the hydrogel loaded with CuS nanoparticles reached 40 °C under near-infrared light irradiation for 20 min, and the release rate of Cu2+ reached 26.89%. The wound-healing rate of the rats in the combined application group reached 79.17% at 13 days, demonstrating superior results over the other control groups. Histological analyses show improved inflammatory response at the healed wound area. These results indicate that this combined application approach represents a promising wound treatment strategy.

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Synthesis and swelling behavior of a fully degradable physical cross-linked high strength hydrogel

Cited by 13 publications

References 16 publications

Tough, Anti-Swelling Supramolecular Hydrogels Mediated by Surfactant–Polymer Interactions for Underwater Sensors

Tough, Anti-Swelling Supramolecular Hydrogels Mediated by Surfactant–Polymer Interactions for Underwater Sensors

Low-Friction Hybrid Hydrogel with Excellent Mechanical Properties for Simulating Articular Cartilage Movement

Combined Strategy of Wound Healing Using Thermo-Sensitive PNIPAAm Hydrogel and CS/PVA Membranes: Development and In-Vivo Evaluation

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