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Tough and Self-Adhesive Nanolignin Multifunctional Hydrogel-Based Strain Sensor for HumanMachine Interaction
Yuxin Song1, Jiabin Han1, Bing Wang1,2
1Liaoning Key Laboratory of Lignocellulose Chemistry and BioMaterials, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, China.
Chemsuschem
|February 17, 2026
Summary
Researchers developed a green, room-temperature method for nanolignin-reinforced polyacrylamide hydrogels (NL@PAM). This sustainable hydrogel offers superior mechanical and conductive properties for advanced soft electronics and intelligent systems.
Area of Science:
- Materials Science
- Biomass Utilization
- Soft Electronics
Background:
- Conductive hydrogels are vital for intelligent robotics and wearable devices.
- Current limitations include restricted functionality and reliance on energy-intensive petrochemical synthesis.
Purpose of the Study:
- To develop a high-performance, multifunctional hydrogel using a sustainable and green approach.
- To address the limitations of existing conductive hydrogels for soft electronics.
Main Methods:
- Synthesized lignin nanoparticles (NLs) using a green method.
- Prepared nanolignin-reinforced polyacrylamide hydrogel (NL@PAM) via a green strategy at room temperature.
- Integrated NLs into the polyacrylamide network through hydrogen bonding and interchain interactions.
Main Results:
- The NL@PAM hydrogel exhibited high tensile strength (1.32 MPa), ultrahigh stretchability (1880%), strong self-adhesion (196 kPa), and high ionic conductivity (13.96 mS cm⁻¹).
- Demonstrated the hydrogel as a wearable sensor for controlling a robotic arm with real-time finger movements.
- The hydrogel successfully converted finger movements into robotic arm control signals, replicating gestures faithfully.
Conclusions:
- Developed a high-performance, multifunctional hydrogel with excellent mechanical and conductive properties.
- Established a sustainable paradigm for soft electronics using green chemistry and renewable biomass.
- The NL@PAM hydrogel shows significant potential for future intelligent systems and wearable devices.
