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Related Experiment Video

Updated: Jul 25, 2026

Generation of Alginate Microspheres for Biomedical Applications

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Published on: August 12, 2012

Multi-performance sodium alginate-based composite films for sensing and electromagnetic shielding.

Fengwei Yu¹, Qi Liu¹, Yan Ding¹

¹MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Research Center of Biomass Clean Utilization, Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, PR China.

International Journal of Biological Macromolecules

|December 11, 2024

Summary

New multifunctional composite films offer advanced electromagnetic interference (EMI) shielding and strain sensing for smart electronics. These MXene/sodium alginate/liquid metal films provide robust protection and human motion monitoring capabilities.

Keywords:

Composite films MXene Sodium alginate

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Area of Science:

Materials Science
Nanotechnology
Wearable Electronics

Background:

Growing demand for flexible, multifunctional films in smart wearable electronics.
Challenges in developing materials with both electromagnetic interference (EMI) shielding and strain sensing capabilities.
Need for advanced materials in demanding electromagnetic environments.

Purpose of the Study:

To develop multifunctional MXene/sodium alginate/liquid metal (MSL) composite films.
To achieve high performance in both EMI shielding and strain sensing.
To explore applications in adaptable wearable electronics.

Main Methods:

Vacuum-assisted filtration combined with calcium ion cross-linking.
Fabrication of MXene/sodium alginate/liquid metal (MSL) composite films.
Optimization of mechanical strength through hydrogen bonding and ionic interactions.

Main Results:

Achieved high tensile strength (71.71 MPa) due to optimized interactions.
Demonstrated exceptional EMI shielding efficacy (50.61 dB) and specific shielding effectiveness (7563 dB·cm2·g-1).
Exhibited favorable electrothermal and photothermal conversion, enabling flexible human motion sensing.

Conclusions:

MSL composite films show significant potential for advanced EMI shielding.
The films are suitable for flexible strain sensing and human motion monitoring.
This research provides a pathway for adaptable wearable electronics in challenging electromagnetic conditions.