From Glutinous‐Rice‐Inspired Adhesive Organohydrogels to Flexible Electronic Devices Toward Wearable Sensing, Power Supply, and Energy Storage

Flexible electronic devices (FEDs) based on hydrogels are attracting increasing interest, but the fabrication of hydrogels for FEDs with adhesiveness and high robustness in harsh‐temperature conditions and long‐term use remains a challenge. Herein, glutinous‐rice‐inspired adhesive organohydrogels ar...

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Bibliographic Details
Published in:Advanced functional materials 2022-01, Vol.32 (1), p.n/a
Main Authors: Zhou, Hongwei, Lai, Jialiang, Zheng, Bohui, Jin, Xilang, Zhao, Guoxu, Liu, Hanbin, Chen, Weixing, Ma, Aijie, Li, Xusheng, Wu, Yuanpeng
Format: Article
Language:English
Subjects:
adhesive organohydrogels
Adhesive strength
Adhesives
amylopectin
Bluetooth
Copolymers
Crosslinking
detachable batteries
Electrolytes
Electronic devices
Energy storage
Freezing
Glycerol-Water
Hydrogels
Materials science
Potassium chloride
Power supply
Pressure sensors
Response time
Sensors
Stretchability
supercapacitors
Tensile strength
wearable sensors
Wearable technology
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Summary:Flexible electronic devices (FEDs) based on hydrogels are attracting increasing interest, but the fabrication of hydrogels for FEDs with adhesiveness and high robustness in harsh‐temperature conditions and long‐term use remains a challenge. Herein, glutinous‐rice‐inspired adhesive organohydrogels are developed by introducing amylopectin into a copolymer network through a “one‐pot” crosslinking procedure in a glycerol–water mixed solvent containing potassium chloride as the conductive ingredient. The organohydrogels exhibit excellent transparency (>90%), conductivity, stretchability, tensile strength, adhesiveness, anti‐freezing property, and moisture retention ability. The wearable strain sensor assembled from the organohydrogels achieves a wide working range, high sensitivity (gauge factor: 8.82), low response time, and excellent reversibility, and properly responds in harsh‐temperature conditions and long‐time storage (90 days). The strain sensor is further integrated with a Bluetooth transmitter and receiver for fabricating wireless wearable sensors. Notably, a sandwich‐structured capacitive pressure sensor with organohydrogels containing reliefs as electrodes records a new gauge factor of 9.43 kPa−1 and achieves a wide response range, low detection limit, and outstanding reversibility. Furthermore, detachable and durable batteries and all‐in‐one supercapacitors are also fabricated utilizing the organohydrogels as electrolytes. Overall, this work offers a strategy to fabricate adhesive organohydrogels for robust FEDs toward wearable sensing, power supply, and energy storage. Glutinous‐rice‐inspired organohydrogels with integrated adhesiveness, stretchability, transparency, conductivity, anti‐freezing, and moisture retention ability are developed by introducing amylopectin into a copolymer network and employed in flexible electronic devices toward wearable sensing, power supply, and energy storage. High sensitivity (gauge factor: = 8.82) for resistive strain sensors and a new sensitivity record (gauge factor: 9.43 kPa−1)for hydrogel‐based pressure sensors are achieved.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.202108423