Self-Healing, Self-Adhesive Silk Fibroin Conductive Hydrogel as a Flexible Strain Sensor

2021 ◽  
Author(s):  
Haiyan Zheng ◽  
Nan Lin ◽  
Yanyi He ◽  
Baoqi Zuo
Keyword(s):  
Silk Fibroin ◽  
Strain Sensor ◽  
Self Healing ◽  
Conductive Hydrogel ◽  
Flexible Strain Sensor

scholarly journals Bio-based, self-adhesive, and self-healing ionogel with excellent mechanical properties for flexible strain sensor

RSC Advances ◽  
2021 ◽  
Vol 11 (59) ◽  
pp. 37661-37666
Author(s):  
Yipeng Zhang ◽  
Junhuai Xu ◽  
Haibo Wang
Keyword(s):  
Mechanical Properties ◽  
Strain Sensor ◽  
Self Healing ◽  
Practical Applications ◽  
Flexible Strain Sensor

Bio-based ionogels with versatile properties are highly desired for 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 Design of a Sensitive Balloon Sensor for Safe Human–Robot Interaction

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 2163
Author(s):  
Dongjin Kim ◽  
Seungyong Han ◽  
Taewi Kim ◽  
Changhwan Kim ◽  
Doohoe Lee ◽  
...  
Keyword(s):  
High Performance ◽  
Strain Sensor ◽  
High Sensitivity ◽  
Human Robot Interaction ◽  
Large Area ◽  
Tactile Sensors ◽  
Robot Interaction ◽  
Mechanical Crack ◽  
Flexible Strain Sensor ◽  
Contact Sensing

As the safety of a human body is the main priority while interacting with robots, the field of tactile sensors has expanded for acquiring tactile information and ensuring safe human–robot interaction (HRI). Existing lightweight and thin tactile sensors exhibit high performance in detecting their surroundings. However, unexpected collisions caused by malfunctions or sudden external collisions can still cause injuries to rigid robots with thin tactile sensors. In this study, we present a sensitive balloon sensor for contact sensing and alleviating physical collisions over a large area of rigid robots. The balloon sensor is a pressure sensor composed of an inflatable body of low-density polyethylene (LDPE), and a highly sensitive and flexible strain sensor laminated onto it. The mechanical crack-based strain sensor with high sensitivity enables the detection of extremely small changes in the strain of the balloon. Adjusting the geometric parameters of the balloon allows for a large and easily customizable sensing area. The weight of the balloon sensor was approximately 2 g. The sensor is employed with a servo motor and detects a finger or a sheet of rolled paper gently touching it, without being damaged.

scholarly journals Structural Reinforcement Effect of a Flexible Strain Sensor Integrated with Pneumatic Balloon Actuators for Soft Microrobot Fingers

Micromachines ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 395
Author(s):  
Satoshi Konishi ◽  
Fuminari Mori ◽  
Ayano Shimizu ◽  
Akiya Hirata
Keyword(s):  
Liquid Metal ◽  
Strain Sensor ◽  
Strain Sensors ◽  
Original Performance ◽  
Sensors And Actuators ◽  
Parylene C ◽  
Structural Reinforcement ◽  
Effective Combination ◽  
Metal Strain ◽  
Flexible Strain Sensor

Motion capture of a robot and tactile sensing for a robot require sensors. Strain sensors are used to detect bending deformation of the robot finger and to sense the force from an object. It is important to introduce sensors in effective combination with actuators without affecting the original performance of the robot. We are interested in the improvement of flexible strain sensors integrated into soft microrobot fingers using a pneumatic balloon actuator (PBA). A strain sensor using a microchannel filled with liquid metal was developed for soft PBAs by considering the compatibility of sensors and actuators. Inflatable deformation generated by PBAs, however, was found to affect sensor characteristics. This paper presents structural reinforcement of a liquid metal-based sensor to solve this problem. Parylene C film was deposited into a microchannel to reinforce its structure against the inflatable deformation caused by a PBA. Parylene C deposition into a microchannel suppressed the interference of inflatable deformation. The proposed method enables the effective combination of soft PBAs and a flexible liquid metal strain sensor for use in microrobot fingers.

Highly Flexible Strain Sensor from Tissue Paper for Wearable Electronics

2016 ◽  
Vol 4 (8) ◽  
pp. 4288-4295 ◽  
Author(s):  
Yuanqing Li ◽  
Yarjan Abdul Samad ◽  
Tarek Taha ◽  
Guowei Cai ◽  
Shao-Yun Fu ◽  
...  
Keyword(s):  
Strain Sensor ◽  
Wearable Electronics ◽  
Tissue Paper ◽  
Flexible Strain Sensor

Flexible strain sensor based on ultra-thin quartz plate

2021 ◽  
pp. 1-1
Author(s):  
Bin Feng ◽  
Hao Jin ◽  
Hao Jin ◽  
Zijing Fang ◽  
Zhentao Yu ◽  
...  
Keyword(s):  
Strain Sensor ◽  
Quartz Plate ◽  
Flexible Strain Sensor

Flexible strain sensor with ridge‐like microstructures for wearable applications

2021 ◽  
Author(s):  
Meng Wang ◽  
Lin Mu ◽  
Hao Zhang ◽  
Suqian Ma ◽  
Yunhong Liang ◽  
...  
Keyword(s):  
Strain Sensor ◽  
Flexible Strain Sensor
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