Dual‐Channel Flexible Strain Sensors Based on Mechanofluorescent and Conductive Hydrogel Laminates

2022 ◽  
pp. 2102306
Author(s):  
Guoqing Lin ◽  
Muqing Si ◽  
Longgang Wang ◽  
Shuxin Wei ◽  
Wei Lu ◽  
...  
Keyword(s):  
Strain Sensors ◽  
Dual Channel ◽  
Conductive Hydrogel

Highly stretchable, self-adhesive, biocompatible, conductive hydrogels as fully polymeric strain sensors

2020 ◽  
Vol 8 (39) ◽  
pp. 20474-20485
Author(s):  
Dong Zhang ◽  
Yijing Tang ◽  
Yanxian Zhang ◽  
Fengyu Yang ◽  
Yonglan Liu ◽  
...  
Keyword(s):  
Strain Sensors ◽  
Surface Adhesion ◽  
Human Movements ◽  
Conductive Hydrogel ◽  
Highly Stretchable ◽  
Strong Surface ◽  
Conductive Hydrogels

A new fully polymeric conductive hydrogel sensor with IPN structure was developed, which achieved ultra-high stretchability, strong surface adhesion, and high sensing stability in response to both large and subtle human movements.

Stretchable and tough conductive hydrogels for flexible pressure and strain sensors

2020 ◽  
Vol 8 (16) ◽  
pp. 3437-3459 ◽  
Author(s):  
Zhenwu Wang ◽  
Yang Cong ◽  
Jun Fu
Keyword(s):  
Implantable Devices ◽  
Strain Sensors ◽  
Recent Advances ◽  
Conductive Hydrogel ◽  
Conductive Hydrogels

This review summarises recent advances in stretchable and tough conductive hydrogel sensors for wearable and implantable devices.

Mussel-inspired adhesive and conductive hydrogel with tunable mechanical properties for wearable strain sensors

2021 ◽  
Vol 585 ◽  
pp. 420-432
Author(s):  
Xiaoyong Zhang ◽  
Jingsi Chen ◽  
Jinmei He ◽  
Yongping Bai ◽  
Hongbo Zeng
Keyword(s):  
Mechanical Properties ◽  
Strain Sensors ◽  
Conductive Hydrogel ◽  
Tunable Mechanical Properties

Conductive hydrogel-based flexible strain sensors with superior chemical stability and stretchability for mechanical sensing in corrosive solvents

2021 ◽  
Author(s):  
Hong Zhang ◽  
Mingqiang Yue ◽  
Tingting Wang ◽  
Jinqing Wang ◽  
Xianzhang Wu ◽  
...  
Keyword(s):  
Chemical Stability ◽  
Strain Sensors ◽  
Harsh Environments ◽  
Flexible Sensors ◽  
Practical Applications ◽  
Conductive Hydrogel ◽  
Mechanical Sensing

Wearable flexible sensors face many harsh environments in practical applications.

scholarly journals A Review of Conductive Hydrogel Used in Flexible Strain Sensor

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 3947 ◽  
Author(s):  
Li Tang ◽  
Shaoji Wu ◽  
Jie Qu ◽  
Liang Gong ◽  
Jianxin Tang
Keyword(s):  
Chemical Properties ◽  
Soft Materials ◽  
Strain Sensors ◽  
Synthetic Methods ◽  
Self Healing ◽  
Ionic Conductors ◽  
Conductive Hydrogel ◽  
Strong Adhesion ◽  
Flexible Strain Sensor ◽  
Conductive Hydrogels

Hydrogels, as classic soft materials, are important materials for tissue engineering and biosensing with unique properties, such as good biocompatibility, high stretchability, strong adhesion, excellent self-healing, and self-recovery. Conductive hydrogels possess the additional property of conductivity, which endows them with advanced applications in actuating devices, biomedicine, and sensing. In this review, we provide an overview of the recent development of conductive hydrogels in the field of strain sensors, with particular focus on the types of conductive fillers, including ionic conductors, conducting nanomaterials, and conductive polymers. The synthetic methods of such conductive hydrogel materials and their physical and chemical properties are highlighted. At last, challenges and future perspectives of conductive hydrogels applied in flexible strain sensors are discussed.

scholarly journals A Skin-Inspired Stretchable, Self-Healing and Electro-Conductive Hydrogel with a Synergistic Triple Network for Wearable Strain Sensors Applied in Human-Motion Detection

Nanomaterials ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1737 ◽  
Author(s):  
Yuanyuan Chen ◽  
Kaiyue Lu ◽  
Yuhan Song ◽  
Jingquan Han ◽  
Yiying Yue ◽  
...  
Keyword(s):  
Polyacrylic Acid ◽  
Cellulose Nanofibrils ◽  
Human Motion ◽  
Strain Sensors ◽  
Current Response ◽  
Oxidized Cellulose ◽  
Self Healing ◽  
Wearable Electronics ◽  
Conductive Hydrogel ◽  
Hydrogel Matrix

Hydrogel-based strain sensors inspired by nature have attracted tremendous attention for their promising applications in advanced wearable electronics. Nevertheless, achieving a skin-like stretchable conductive hydrogel with synergistic characteristics, such as ideal stretchability, excellent sensing performance and high self-healing efficiency, remains challenging. Herein, a highly stretchable, self-healing and electro-conductive hydrogel with a hierarchically triple-network structure was developed through a facile two-step preparation process. Firstly, 2, 2, 6, 6-tetrametylpiperidine-1-oxyl (TEMPO)-oxidized cellulose nanofibrils were homogeneously dispersed into polyacrylic acid hydrogel, with the presence of ferric ions as an ionic crosslinker to synthesize TEMPO-oxidized cellulose nanofibrils/polyacrylic acid hydrogel via a one-pot free radical polymerization. A polypyrrole conductive network was then incorporated into the synthetic hydrogel matrix as the third-level gel network by polymerizing pyrrole monomers. The hierarchical 3D network was mutually interlocked through hydrogen bonds, ionic coordination interactions and physical entanglements of polymer chains to achieve the target composite hydrogels with a homogeneous texture, enhanced mechanical stretchability (elongation at break of ~890%), high viscoelasticity (maximum storage modulus of ~27.1 kPa), intrinsic self-healing ability (electrical and mechanical healing efficiencies of ~99.4% and 98.3%) and ideal electro-conductibility (~3.9 S m−1). The strain sensor assembled by the hybrid hydrogel, with a desired gauge factor of ~7.3, exhibits a sensitive, fast and stable current response for monitoring small/large-scale human movements in real-time, demonstrating promising applications in damage-free wearable electronics.

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