Adhesive, Biocompatible, Antibacterial, and Degradable Collagen-Based Conductive Hydrogel as Strain Sensor for Human...

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Biomedical Engineering

Background:

• Conductive hydrogels (CHs) offer flexibility and conductivity for devices like electronic skin.
• Biomedical applications are limited by poor biocompatibility and antibacterial properties of CHs.
• Collagen, a key extracellular matrix (ECM) component, provides excellent biocompatibility.

Purpose of the Study:

• To develop a novel conductive hydrogel with enhanced biocompatibility and antimicrobial properties.
• To create a flexible strain sensor for real-time monitoring of human motion.
• To explore potential applications in wearable sensors and implantable medical devices.

Main Methods:

• Synthesized dopamine-polypyrrole-collagen (DA-PPY-COL) hydrogel via dopamine-mediated in situ polymerization of pyrrole within a collagen matrix.
• Evaluated the hydrogel as a strain sensor for monitoring human body movements and micro-expressions.
• Conducted biological experiments to assess antimicrobial properties, biocompatibility, and degradability.

Main Results:

• The DA-PPY-COL hydrogel demonstrated excellent flexibility, self-adhesion, and electrical conductivity.
• The hydrogel effectively functioned as a strain sensor, accurately monitoring large-scale and fine human movements.
• Biological tests confirmed good antimicrobial activity, biocompatibility, and biodegradability of the hydrogel.

Conclusions:

• The DA-PPY-COL hydrogel presents a promising material for biomimetic electronic skin and wearable sensors.
• The material's properties support its potential for safe use in monitoring human motor behavior.
• This study highlights the potential of DA-PPY-COL hydrogels for future implantable and degradable medical device applications.