Mussel-Inspired Wet-Adhesive Multifunctional Organohydrogel with Extreme Environmental Tolerance for Wearable Strain Sensor.
Zhenling ShangGuoqiang LiuYue SunChenghao LiNan ZhaoZhuo ChenRuisheng GuoZijian ZhengFeng ZhouWeimin LiuPublished in: ACS applied materials & interfaces (2023)
As a flexible artificial material, the conductive hydrogel has broad application prospects in flexible wearable electronics, soft robotics, and biomedical monitoring. However, traditional hydrogels still face many challenges, such as long-term stability, availability in extreme environments, and long-lasting adhesion to the skin surface under sweaty or humid conditions. To circumvent the above issues, one kind of ionic conductive hydrogel was prepared by a simple one-pot method that dissolved chitosan (CS), 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS), tannic acid (TA), and 2-methoxy-ethyl acrylate (MEA) into dimethyl sulfoxide (DMSO)/H 2 O solvent. The resulting hydrogel showed excellent tensile properties (1440%), extreme environmental tolerance (-40-60 °C), adhesion (72 KPa at porcine skin), ionic conductivity (0.87 S m -1 ), and high-efficiency antibacterial property. Furthermore, the produced organohydrogel strain sensor exhibited high strain sensitivity (GF = 4.07), excellent signal sensing capabilities (human joint movement, microexpression, and sound signals), and long-term cyclic stability (400 cycles). Looking beyond, this work provides a simple and promising strategy for using hydrogel sensors in extreme environments for e-skin, health monitoring, and wearable electronic devices.
Keyphrases
- wound healing
- drug delivery
- climate change
- hyaluronic acid
- tissue engineering
- ionic liquid
- high efficiency
- heart rate
- human health
- solid state
- endothelial cells
- healthcare
- soft tissue
- cancer therapy
- public health
- biofilm formation
- drug release
- risk assessment
- blood pressure
- gold nanoparticles
- cell migration
- staphylococcus aureus
- extracellular matrix
- essential oil
- silver nanoparticles
- metal organic framework