An organic hydrogel with high-strength, high-water retention properties for pressure sore protection

Zhang, Li; He, Miaomiao; Chen, Lingdong; Xu, Pinghua; Bao, Jiaohui; Hu, Xiuyuan

doi:10.1007/s10853-021-06571-0

Cited by 10 publications

(4 citation statements)

References 55 publications

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“…Finally, the consecutively-printed IHPS can also work under a wide temperature range (−20 °C–90 °C). Typically under the conditions of −20 °C, the HS and LS hydrogels exhibited exceptional anti-freezing properties due to the presence of lithium chloride 32 , 33 and/or glycerol 34 , whereas the CS and AS hydrogels experienced partial freezing with weakly bound water and unfrozen water inside the hydrogel matrix (Supplementary Fig. 17 ) 35 .…”

Section: Discussionmentioning

confidence: 99%

Consecutive multimaterial printing of biomimetic ionic hydrogel power sources with high flexibility and stretchability

He,

Yue,

Qiu

et al. 2024

Nat Commun

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Electric eel is an excellent example to harness ion-concentration gradients for sustainable power generation. However, current strategies to create electric-eel-inspired power sources commonly involve manual stacking of multiple salinity-gradient power source units, resulting in low efficiency, unstable contact, and poor flexibility. Here we propose a consecutive multimaterial printing strategy to efficiently fabricate biomimetic ionic hydrogel power sources with a maximum stretchability of 137%. The consecutively-printed ionic hydrogel power source filaments showed seamless bonding interface and can maintain stable voltage outputs for 1000 stretching cycles at 100% strain. With arrayed multi-channel printhead, power sources with a maximum voltage of 208 V can be automatically printed and assembled in parallel within 30 min. The as-printed flexible power source filaments can be woven into a wristband to power a digital wristwatch. The presented strategy provides a tool to efficiently produce electric-eel-inspired ionic hydrogel power sources with great stretchability for various flexible power source applications.

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Section: Discussionmentioning

confidence: 99%

Consecutive multimaterial printing of biomimetic ionic hydrogel power sources with high flexibility and stretchability

He,

Yue,

Qiu

et al. 2024

Nat Commun

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“…Chitosan and cationic guar gum Oxidation, freeze-drying, carbonized Thermal/pH-responsive [39] Methacryloyl gelatin (GelMA) UV polymerization Mechanical strength, antibacterial, antifreezing [40] Polyvinyl alcohol (PVA) Solution casting…”

Section: Organic Hydrogelsmentioning

confidence: 99%

Flexible Polymer Hydrogels for Wearable Energy Storage Applications

Mahdavian,

Allahbakhsh,

Bahramian

et al. 2023

Adv Materials Technologies

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The recent and fast‐growing trends related to the development of wearable technologies have raised the need for efficient and high‐performance energy storage devices having extra features such as flexibility and lightweight. Polymer hydrogels, as viscoelastic lightweight porous nanostructures with tunable surface and structural properties, can play a crucial role in the design of these future energy storage devices. Herein, recent developments and progress in the use of polymer hydrogels to design flexible and wearable energy storage devices are presented and discussed. The 3D structure of polymer hydrogels and porous nanostructures based on these hydrogels provides a platform to design flexible supercapacitors, batteries, and personal thermal management devices. Herein, different types of polymer hydrogels are presented, and their main fabrication techniques are reported. Moreover, the main structural properties affecting the energy storage performance of polymer hydrogels are discussed. In addition to recent progress in the design of polymer‐hydrogel‐based wearable devices, recent developments in polymer hydrogels for flexible applications (batteries, supercapacitors, and thermal energy storage systems) are reviewed in detail.

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“…One is adding organic solvents directly to hydrogel prepolymer solutions, 37 and the other is replacing solvents of the hydrogel by soaking in organic solvents. 38 Hu et al reported a novel antifreezing conductive hydrogel by the one-pot method with glycerol. The antifreezing ability of the hydrogel increased with addition of 50%−70% glycerol.…”

Section: Introductionmentioning

confidence: 99%

“…There are generally two ways to incorporate organic solvents into hydrogels. One is adding organic solvents directly to hydrogel prepolymer solutions, and the other is replacing solvents of the hydrogel by soaking in organic solvents . Hu et al reported a novel antifreezing conductive hydrogel by the one-pot method with glycerol.…”

Section: Introductionmentioning

confidence: 99%

Hazardous Gases-Responsive Photonic Crystals Cryogenic Sensors Based on Antifreezing and Water Retention Hydrogels

Zhao,

Cai,

Zhang

et al. 2023

ACS Appl. Mater. Interfaces

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Nowadays, the sensing of hazardous gases is urgent for the consideration of public safety and human health, especially in extreme conditions of low temperatures. In this study, a photonic crystals (PhCs) sensor with water retention and antifreezing properties was developed and applied to visual hazardous gases sensing at low temperature, passively. The sensor was prepared by dip-coating with poly(methyl methacrylate) (PMMA) colloidal microspheres followed by embedding in k-carrageenan/polyacrylamide-ethylene glycol (k-CA/PAM-EG) hydrogel. The sensor responded to hazardous gases, including ammonia, toluene, xylene, acetone, methanol, ethanol, and 1-propanol, with a change in the reflection wavelength and visible structural color. At room temperature, the reflection wavelength of the sensor blue-shifted 49 nm in ammonia, and the structural color changed from red to yellow. For low temperatures, the sensor showed great water retention and antifreezing properties even at −57 °C due to the double network. The sensor still had a great response to hazardous gases after freezing at −20 °C for 12 h and testing at 0 °C, and the obtained results were similar to those at room temperature. Based on this excellent stability and visual sensing at low temperature, the sensor demonstrates the potential for detection of hazardous vapors in extreme environments.

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An organic hydrogel with high-strength, high-water retention properties for pressure sore protection

Cited by 10 publications

References 55 publications

Consecutive multimaterial printing of biomimetic ionic hydrogel power sources with high flexibility and stretchability

Consecutive multimaterial printing of biomimetic ionic hydrogel power sources with high flexibility and stretchability

Flexible Polymer Hydrogels for Wearable Energy Storage Applications

Hazardous Gases-Responsive Photonic Crystals Cryogenic Sensors Based on Antifreezing and Water Retention Hydrogels

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