Highly stretchable, transparent and conductive double-network ionic hydrogels for strain and pressure sensors with ultrahigh sensitivity

2021 ◽  
Author(s):  
Jie Yu ◽  
Ming Wang ◽  
Chao Dang ◽  
Cunzhi Zhang ◽  
Xiao Feng ◽  
...  
Keyword(s):  
Facial Expressions ◽  
Human Activities ◽  
Pressure Sensors ◽  
One Pot ◽  
Double Network ◽  
Conductive Hydrogel ◽  
Highly Stretchable ◽  
Ultrahigh Sensitivity

Transparent ionic conductive hydrogel sensor is fabricated by one-pot polymerization, which shows high stretchability and reliable sensitivity. Therefore, it can detect subtle human activities, such as pulse, speaking, and facial expressions.

scholarly journals Highly Stretchable, Elastic, and Sensitive MXene-Based Hydrogel for Flexible Strain and Pressure Sensors

Research ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-13 ◽  
Author(s):  
Yao Lu ◽  
Xinyu Qu ◽  
Wen Zhao ◽  
Yanfang Ren ◽  
Weili Si ◽  
...  
Keyword(s):  
Limit Of Detection ◽  
Full Range ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Strain Sensors ◽  
Poly Vinyl Alcohol ◽  
Wearable Electronics ◽  
Double Network ◽  
Hydrogel Matrix ◽  
Highly Stretchable

Electronic skin is driving the next generation of cutting-edge wearable electronic products due to its good wearability and high accuracy of information acquisition. However, it remains a challenge to fulfill the requirements on detecting full-range human activities with existing flexible strain sensors. Herein, highly stretchable, sensitive, and multifunctional flexible strain sensors based on MXene- (Ti3C2Tx-) composited poly(vinyl alcohol)/polyvinyl pyrrolidone double-network hydrogels were prepared. The uniformly distributed hydrophilic MXene nanosheets formed a three-dimensional conductive network throughout the hydrogel, endowing the flexible sensor with high sensitivity. The strong interaction between the double-network hydrogel matrix and MXene greatly improved the mechanical properties of the hydrogels. The resulting nanocomposited hydrogels featured great tensile performance (2400%), toughness, and resilience. Particularly, the as-prepared flexible pressure sensor revealed ultrahigh sensitivity (10.75 kPa-1) with a wide response range (0-61.5 kPa), fast response (33.5 ms), and low limit of detection (0.87 Pa). Moreover, the hydrogel-based flexible sensors, with high sensitivity and durability, could be employed to monitor full-range human motions and assembled into some aligned devices for subtle pressure detection, providing enormous potential in facial expression and phonation recognition, handwriting verification, healthy diagnosis, and wearable electronics.

Highly stretchable, healable, sensitive double-network conductive hydrogel for wearable sensor

Polymer ◽  
2020 ◽  
Vol 211 ◽  
pp. 123095
Author(s):  
Wenhui Zheng ◽  
Yangyang Li ◽  
Lijuan Xu ◽  
Yudong Huang ◽  
Zaixing Jiang ◽  
...  
Keyword(s):  
Wearable Sensor ◽  
Double Network ◽  
Conductive Hydrogel ◽  
Highly Stretchable

Biomimetic integration of tough polymer elastomer with conductive hydrogel for highly stretchable, flexible electronic

Nano Energy ◽  
2021 ◽  
pp. 106735
Author(s):  
Xiang Liu ◽  
Xiaofei Chen ◽  
Xinyi Chi ◽  
Zujian Feng ◽  
Chunfang Yang ◽  
...  
Keyword(s):  
Flexible Electronic ◽  
Conductive Hydrogel ◽  
Highly Stretchable

scholarly journals Quantum effect-based flexible and transparent pressure sensors with ultrahigh sensitivity and sensing density

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Lan Shi ◽  
Zhuo Li ◽  
Min Chen ◽  
Yajie Qin ◽  
Yizhou Jiang ◽  
...  
Keyword(s):  
Quantum Effect ◽  
Pressure Sensors ◽  
Ultrahigh Sensitivity

scholarly journals Biocompatible, stretchable and mineral PVA–gelatin–nHAP hydrogel for highly sensitive pressure sensors

RSC Advances ◽  
2018 ◽  
Vol 8 (65) ◽  
pp. 36999-37007 ◽  
Author(s):  
Yi Zhu ◽  
Weipeng Lu ◽  
Yanchuan Guo ◽  
Yu Chen ◽  
Yuxiao Wu ◽  
...  
Keyword(s):  
Pressure Sensors ◽  
Conductive Hydrogel ◽  
Highly Sensitive ◽  
Sensitive Pressure

A biocompatible, stretchable and mineral conductive hydrogel used for highly sensitive pressure sensors.

Multilevel Microstructured Flexible Pressure Sensors with Ultrahigh Sensitivity and Ultrawide Pressure Range for Versatile Electronic Skins

Small ◽  
2019 ◽  
Vol 15 (10) ◽  
pp. 1804559 ◽  
Author(s):  
Xing Tang ◽  
Congyi Wu ◽  
Lin Gan ◽  
Tian Zhang ◽  
Tingting Zhou ◽  
...  
Keyword(s):  
Pressure Range ◽  
Pressure Sensors ◽  
Ultrahigh Sensitivity ◽  
Flexible Pressure Sensors

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.

A Robust, One-Pot Synthesis of Highly Mechanical and Recoverable Double Network Hydrogels Using Thermoreversible Sol-Gel Polysaccharide

2013 ◽  
Vol 25 (30) ◽  
pp. 4171-4176 ◽  
Author(s):  
Qiang Chen ◽  
Lin Zhu ◽  
Chao Zhao ◽  
Qiuming Wang ◽  
Jie Zheng
Keyword(s):  
Sol Gel ◽  
One Pot ◽  
Double Network ◽  
One Pot Synthesis

scholarly journals One-pot Synthesis of Janus Nanosheets on Strengthening and Toughening Nanocomposite Double Network Hydrogels

2020 ◽  
Author(s):  
Shuning Chen ◽  
Wei Qian ◽  
Jiawen Chen ◽  
Jianrong Lin ◽  
Qinhui Chen
Keyword(s):  
Crosslinking Agent ◽  
Chemical Properties ◽  
Fatigue Property ◽  
Self Healing ◽  
Interfacial Behavior ◽  
One Pot ◽  
Double Network ◽  
Janus Nanoparticles ◽  
Adsorption Desorption ◽  
Chemical Groups

Abstract Nanoparticles have leading strengthening and toughening effects on polymer matrix. Anisotropic Janus nanoparticles exhibit abundant interfacial behavior because their two surfaces possess different chemical properties. Herein, Janus nanosheets (JNSs) were synthesized by one-pot method. Different surficial morphology and chemical groups on each surface of JNSs were observed by SEM and AFM. In the process of tannic acid/polyacrylic acid (TA/PAA) polymerization, JNSs act as crosslinking agent to promote the formation of nanocomposite double network hydrogels. When the TA/PAA hydrogels were stretched, both strength and toughness of TA/PAA hydrogels are improved owing to the solid silica enhancement, the orientation-disorientation and the interfacial chemical bond of JNSs. Besides, adsorption-desorption of PAA molecular chains also toughens hydrogels. The tensile strength and the elongation at break of TA/PAA hydrogels containing 1.5wt% JNSs are 42 KPa and 370.9 %, respectively. Compared with the TA/PAA without JNSs, they increase by 90.9% and 88.7%. The recovery and self-healing of hydrogels with JNSs were accelerated dramatically. Meanwhile, the anti-fatigue property was improved. The as-prepared anisotropic Janus particles synthesized by one-pot method on strengthening and toughening double network hydrogels provide a new idea for the synthesis of Janus nanosheets and the crosslinking of hydrogel.

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