Hybrid double-network hydrogel for highly stretchable, excellent sensitive, stabilized, and transparent strain sensors

Meng, Xiangjian; Pan, Shenxin; Li, Hanhong; Xiao, Yi; Zhan, Yuan; Sun, Zhengguang; Jiang, Xueliang; Zhang, Yuhong

doi:10.1080/09205063.2021.1922170

Cited by 10 publications

(6 citation statements)

References 58 publications

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“…To explore the effect of Al 3+ on the conductivity of the hydrogels, hydrogels with different contents of Al 3+ were connected to the LCR meter and the conductivities of the hydrogel were calculated from the resistance values. 19 As presented in Figure S3, the conductivity of the PAA/PEI/Al-TA hydrogel increased with the increase of the Al 3+ concentration. The conductivity of the PAA/PEI/Al-TA 4 hydrogel was 0.98 S/m.…”

Section: Mechanical and Adhesionmentioning

confidence: 82%

“…Conductivity is another parameter for the hydrogel-based sensors, which is dependent on the ability of the free migration of ions in transport channels. To explore the effect of Al 3+ on the conductivity of the hydrogels, hydrogels with different contents of Al 3+ were connected to the LCR meter and the conductivities of the hydrogel were calculated from the resistance values . As presented in Figure S3, the conductivity of the PAA/PEI/Al-TA hydrogel increased with the increase of the Al 3+ concentration.…”

Section: Resultsmentioning

confidence: 99%

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Construction of Multifunctional Hydrogels via a Supramolecular Self-Assembled Strategy with Ultrahigh Sensitivity to Strain Responsiveness

Liu,

Wu,

et al. 2023

ACS Appl. Polym. Mater.

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Intelligent electronic devices have been diffusely used in health detection, energy storage, and biomedicine based on their autonomy, flexibility, and adaptive improvement, but traditional materials have the drawbacks of limited flexibility, instability, and inadequate reusability. Herein, poly(acrylic acid)-based hydrogels with efficient selfhealing performance and high-precision sensing performance were constructed by a supramolecular self-assembled strategy based on electrostatic interactions, metal coordination, and hydrogen bonds. This hydrogel exhibited a tensile strength of 102.9 kPa and an elongation at break of 990% with good fatigue resistance and self-recovery ability. The hydrogel also displayed good light transmission and UV-shielding effects, as well as good adhesion ability on different materials. Besides, the hydrogel had an electrical conductivity of 0.98 S/m, which could light up a light-emitting diode (LED) bulb when connected in a circuit. Based on these great features, the hydrogel exhibited ultrahigh sensitivity with gauge factor values of 4.00 and 17.00 within the strain ranges of 0−200 and 600−800%, respectively. The hydrogel could be applied not only for large human movements but also for detecting subtle movements. Most importantly, the hydrogel exhibited a great self-healing property, which could almost self-heal within 6 h with a healing efficiency of 99%. Therefore, this work provides a multifunctional hydrogel construction method, and the prepared hydrogels displayed great potential application in the strain sensor field.

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Section: Mechanical and Adhesionmentioning

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Construction of Multifunctional Hydrogels via a Supramolecular Self-Assembled Strategy with Ultrahigh Sensitivity to Strain Responsiveness

Liu,

Wu,

et al. 2023

ACS Appl. Polym. Mater.

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“…The introduction of nontoxic natural polymers including sodium alginate, 20 chitosan, 21 and guar gum 22 biomacromolecule extracted from human and animal cartilage and skin, is biodegradable and biocompatible, 23,24 and contains abundant functional groups (such as amino acids, −COO− and −OH). However, the poor mechanical performances of gelatin hydrogels have hindered their use in the field of sensors.…”

Section: Introductionmentioning

confidence: 99%

“…The introduction of nontoxic natural polymers including sodium alginate, chitosan, and guar gum for the preparation of flexible conductive hydrogels has developed into a booming scientific field. Gelatin, a kind of natural biomacromolecule extracted from human and animal cartilage and skin, is biodegradable and biocompatible, , and contains abundant functional groups (such as amino acids, −COO– and −OH).…”

Section: Introductionmentioning

confidence: 99%

Transparent, High Stretchable, Environmental Tolerance, and Excellent Sensitivity Hydrogel for Flexible Sensors and Capacitive Pens

Xiao,

Lu,

et al. 2023

ACS Appl. Mater. Interfaces

Self Cite

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The prospect of ionic conductive hydrogels in multifunctional sensors has generated widespread scientific interest. The new generation of flexible materials should be combined with superior mechanical properties, high conductivity, transparency, sensitivity, good self-restoring fatigue properties, and other multifunctional characteristics, while the current materials are difficult to meet these requirements. Herein, we prepared poly(acrylamide-acrylic acid) (P(AM-AA))/gelatin/glycerol-Al 3+ (PG 1 G 2 A) ionic conducting hydrogel by one-pot polymerization under UV light. The prepared PG 1 G 2 A ionic conductive hydrogel had high tensile strength (539.18 kPa), excellent tensile property (1412.96%), good fast self-recovery and fatigue resistance, high transparency (>80%), excellent moisturizing, and antifreezing/ drying properties. In addition, the ionic conductive hydrogel-based strain sensor can respond to mechanical stimulation and generate accurate, stable, and recyclable electrical signals, with excellent sensitivity (GF 5.81). In addition, the PG 1 G 2 A hydrogel could be used as flexible wearable devices for monitoring multiple strain and subtle movements of different body parts at different temperatures. Interestingly, the PG 1 G 2 A hydrogel capacitive pen embedded in the mold can be used to write and draw on the screen of a phone or tablet. This new multifunctional ionic conducting hydrogel shows broad application prospects in E-skin, motion monitoring, and human-computer interaction in extreme environments.

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“…The generated network provides the hydrogel with stronger mechanical properties [ 27 ]. Inspired by this, the highly mechanical DN hydrogels were candidates for flexible strain sensors [ 28 , 29 , 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

A Highly Mechanical, Conductive, and Cryophylactic Double Network Hydrogel for Flexible and Low-Temperature Tolerant Strain Sensors

Diao

Liu

Yang

2022

Gels

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Due to their stretchability, conductivity, and good biocompatibility, hydrogels have been recognized as potential materials for flexible sensors. However, it is still challenging for hydrogels to meet the conductivity, mechanical strength, and freeze-resistant requirements in practice. In this study, a chitosan-poly (acrylic acid-co-acrylamide) double network (DN) hydrogel was prepared by immersing the chitosan-poly (acrylic acid-co-acrylamide) composite hydrogel into Fe2(SO4)3 solution. Due to the formation of an energy-dissipative chitosan physical network, the DN hydrogel possessed excellent tensile and compression properties. Moreover, the incorporation of the inorganic salt endowed the DN hydrogel with excellent conductivity and freeze-resistance. The strain sensor prepared using this DN hydrogel displayed remarkable sensitivity and reliability in detecting stretching and bending deformations. In addition, this DN hydrogel sensor also worked well at a lower temperature (−20 °C). The highly mechanical, conductive, and freeze-resistant DN hydrogel revealed a promising application in the field of wearable devices.

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Hybrid double-network hydrogel for highly stretchable, excellent sensitive, stabilized, and transparent strain sensors

Cited by 10 publications

References 58 publications

Construction of Multifunctional Hydrogels via a Supramolecular Self-Assembled Strategy with Ultrahigh Sensitivity to Strain Responsiveness

Construction of Multifunctional Hydrogels via a Supramolecular Self-Assembled Strategy with Ultrahigh Sensitivity to Strain Responsiveness

Transparent, High Stretchable, Environmental Tolerance, and Excellent Sensitivity Hydrogel for Flexible Sensors and Capacitive Pens

A Highly Mechanical, Conductive, and Cryophylactic Double Network Hydrogel for Flexible and Low-Temperature Tolerant Strain Sensors

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