Highly Stretchable and Biocompatible Wrinkled Nanoclay-Composite Hydrogel With Enhanced Sensing Capability for...

Area of Science:

• Biomaterials Science
• Soft Robotics
• Implantable Sensors

Background:

• Balancing biocompatibility and mechanical-electrical sensing performance in implantable devices is challenging due to inflammatory responses.
• Existing sensors often compromise performance or biocompatibility after in vivo implantation.

Purpose of the Study:

• To develop a novel bioinspired, wrinkle-reinforced, adaptive nanoclay-interlocked soft strain sensor.
• To achieve high stretchability, elasticity, ionic conductivity, and improved biosafety for in vivo applications.

Main Methods:

• Fabrication of a nanoclay-composite hydrogel with an interpenetrating network.
• Incorporation of amphiphilic ions to enhance protein resistance and reduce non-specific adsorption.
• Characterization of structural, mechanical, and electrical properties of the hydrogel sensor.

Main Results:

• The hydrogel sensor demonstrated excellent tensile properties and high, reliable sensing capacity.
• Amphiphilic ion incorporation significantly improved protein resistance, enhancing biosafety.
• The sensor accurately localized myocardial infarction regions in a proof-of-concept study.

Conclusions:

• The novel nanoclay-composite hydrogel offers a promising platform for implantable biosensors.
• This technology could enable real-time monitoring of pathological changes, particularly in heart disease.
• The sensor design addresses key challenges in biocompatibility and sensing performance for medical devices.