An anti-freezing wearable strain sensor based on nanoarchitectonics with a highly stretchable, tough, anti-fatigue and fast self-healing composite hydrogel

Wang, Yanqing; Pang, Bo; Wang, Rixuan; Gao, Yiliang; Gao, Chuanhui

doi:10.1016/j.compositesa.2022.107039

Cited by 42 publications

(27 citation statements)

References 44 publications

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“…To study the low-temperature resistance of the SL-Ca 2+ /PAM hydrogel, the shape was observed after being placed in an ultra-low temperature refrigerator at −80 °C for 6, 12, 18, and 24 h. As can be seen from Figure b, there was no change inside the hydrogel when it was left at −80 °C for 6 h, and few ice crystals were formed inside the hydrogel when it was left for 12 h. Indeed, even after 24 h, the hydrogel can also be pressed down completely, showing excellent anti-freezing property. In order to accurately investigate the finite freezing temperature of the hydrogel, DSC , was carried out from −80 °C to 50 °C. As shown in Figure c, the SL/PAM hydrogel had a sharp endothermic peak and a wide endothermic peak at −1.2 and −15.1 °C, corresponding to the melting point of free water and bound water, respectively.…”

Section: Resultsmentioning

confidence: 99%

Room Temperature Ca²⁺-Initiated Free Radical Polymerization for the Preparation of Conductive, Adhesive, Anti-freezing and UV-Blocking Hydrogels for Monitoring Human Movement

Zong

et al. 2023

ACS Omega

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In recent years, conductive hydrogels have received increasing attention as wearable electronics due to the electrochemical properties of conductive polymers combined with the softness of hydrogels. However, conventional hydrogels are complicated to prepare, require high temperature or UV radiation to trigger monomer polymerization, and are frozen at low temperatures, which seriously hinder the application of flexible wearable devices. In this paper, a conductive sensor integrating mechanical properties, adhesion, UV shielding, anti-dehydration, and anti-freeze was prepared based on Ca 2+ -initiated radical polymerization at room temperature using the synergy of sodium lignosulfonate, acrylamide (AM), and calcium chloride (CaCl 2 ). Metal ions can activate ammonium persulfate to generate free radicals that allow rapid gelation of AM monomers at room temperature without external stimuli. Due to ionic cross-linking and non-covalent interaction, the hydrogels have good tensile properties (1153% elongation and 168 kPa tensile strength), high toughness (758 KJ•m −3 ), excellent adhesive properties (48.5 kPa), high ionic conductivity (7.2 mS•cm −1 ), and UV resistance (94.4%). CaCl 2 can inhibit ice nucleation, so that the hydrogels have anti-dehydration and frost resistance properties and even at −80 °C can maintain flexibility, high conductivity, and adhesion. Assembled into a flexible sensor, it can sense various large and small movements such as compression, bending, and talking, which is a flexible sensing material with wide application prospects.

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Section: Resultsmentioning

confidence: 99%

Room Temperature Ca²⁺-Initiated Free Radical Polymerization for the Preparation of Conductive, Adhesive, Anti-freezing and UV-Blocking Hydrogels for Monitoring Human Movement

Zong

et al. 2023

ACS Omega

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“…The fatigue resistance can be analyzed by the degree of overlap of the strain-recovery cycle hysteresis curves [75]. A high degree of overlapping means that the sensor can recover smoothly to its original state after experiencing strain and signifies excellent fatigue resistance [76,77].…”

Section: Main Performance Evaluation Parametersmentioning

confidence: 99%

Recent application progress and key challenges of biomass-derived carbons in resistive strain/pressure sensor

Shi

Das

2023

Sci. China Mater.

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Resistive strain/pressure sensors have attracted intensive attention due to their irreplaceable role in the fields of motor behavior monitoring, human health diagnosis, and human machine interface. Notably, the material and structural design have significant impacts on the performance of resistive strain/pressure sensors. Biomass-derived carbons (BDCs) are considered as popular candidates for realizing the fabrication of resistive strain/pressure sensors because of their excellent properties such as abundant sources, diverse structures, and satisfactory electrical conductivity. This review presents the recent progress of BDCs in the field of resistive strain/pressure sensors and their key challenges. First, the classification methods, evaluation criteria and sensing mechanisms of previously reported resistive strain/pressure sensors are systematically outlined and discussed. Subsequently, the preparation of BDCs with different macrostructures, including one-dimensional (1D), 2D, and 3D structures, and their recent progress in the field of resistive strain/pressure sensors are summarized. Next, the respective advantages of BDCs with different macroscopic structures in the field of resistive strain/pressure sensors are carefully analyzed, and the relationship between different structures and the comprehensive sensing performances of devices is discussed. Finally, the future prospects and major challenges are proposed for BDC-based resistive strain/pressure sensors, and some key future research directions are given.

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“…To reach high energy storage densities, [ 57,149 ] fast energy storage/release, [ 150 ] high flexibility, [ 151 ] improved electrical/thermal/ion conductivity, [ 14b,152 ] and fast self‐healing properties, [ 153 ] polymer hydrogels can be reinforced with different fillers/additives to fabricate composite polymer hydrogels. The incorporation of additives, such as nanomaterials, not only mostly improves the accessible surface area of polymer hydrogels but also provides a route to control the morphology of the hydrogels to improve the final properties of these porous materials.…”

Section: Polymer 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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An anti-freezing wearable strain sensor based on nanoarchitectonics with a highly stretchable, tough, anti-fatigue and fast self-healing composite hydrogel

Cited by 42 publications

References 44 publications

Room Temperature Ca²⁺-Initiated Free Radical Polymerization for the Preparation of Conductive, Adhesive, Anti-freezing and UV-Blocking Hydrogels for Monitoring Human Movement

Room Temperature Ca²⁺-Initiated Free Radical Polymerization for the Preparation of Conductive, Adhesive, Anti-freezing and UV-Blocking Hydrogels for Monitoring Human Movement

Recent application progress and key challenges of biomass-derived carbons in resistive strain/pressure sensor

Flexible Polymer Hydrogels for Wearable Energy Storage Applications

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An anti-freezing wearable strain sensor based on nanoarchitectonics with a highly stretchable, tough, anti-fatigue and fast self-healing composite hydrogel

Cited by 42 publications

References 44 publications

Room Temperature Ca2+-Initiated Free Radical Polymerization for the Preparation of Conductive, Adhesive, Anti-freezing and UV-Blocking Hydrogels for Monitoring Human Movement

Room Temperature Ca2+-Initiated Free Radical Polymerization for the Preparation of Conductive, Adhesive, Anti-freezing and UV-Blocking Hydrogels for Monitoring Human Movement

Recent application progress and key challenges of biomass-derived carbons in resistive strain/pressure sensor

Flexible Polymer Hydrogels for Wearable Energy Storage Applications

Contact Info

Product

Resources

About

Room Temperature Ca²⁺-Initiated Free Radical Polymerization for the Preparation of Conductive, Adhesive, Anti-freezing and UV-Blocking Hydrogels for Monitoring Human Movement

Room Temperature Ca²⁺-Initiated Free Radical Polymerization for the Preparation of Conductive, Adhesive, Anti-freezing and UV-Blocking Hydrogels for Monitoring Human Movement