In-situ forming ultra-mechanically sensitive materials for high-sensitivity stretchable fiber strain sensors

Rouhui Yu ¹, Changxian Wang ², Xiangheng Du ¹

⁰State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.

National Science Review +

|

June 17, 2024

View abstract on PubMed

Summary

Researchers developed highly sensitive fiber strain sensors by anchoring sensing materials directly onto fibers. These wearable sensors offer ultra-low detection limits and high stretchability for advanced healthcare monitoring.

Area Of Science

Materials Science
Nanotechnology
Wearable Technology

Background

Fiber electronics are crucial for wearable applications but face challenges in integrating robust active layers for high-sensitivity sensors.
Small fiber sizes and curved surfaces hinder the development of effective strain sensing capabilities in textiles.

Purpose Of The Study

To develop a method for firmly anchoring functional sensing materials onto fiber surfaces in-situ.
To enhance the sensitivity and performance of fiber strain sensors for wearable applications.

Main Methods

Utilized a hydrolytic condensation process to anchor sensing materials onto fiber surfaces, creating robust interfacial adhesion.
Fabricated stretchable fiber sensors with improved mechanical sensitivity due to *in-situ* generated microcracks during stretching.

Main Results

Achieved an ultra-low strain detection limit of 0.05% and high stretchability of 100%.
Demonstrated a high gauge factor of 433.6, representing a 254-fold enhancement in sensitivity.
Successfully recorded physiological signals, such as pulse wave velocity, using the soft and lightweight fiber sensors.

Conclusions

The developed *in-situ* anchoring strategy effectively enhances the performance of fiber strain sensors.
These high-performance fiber sensors are suitable for integration into wearable smart healthcare systems for continuous health monitoring.
Presents a viable approach for creating advanced stretchable electronic devices for diverse applications.

Keywords:

fiber healthcare strain sensor stretchable wearable