Breakthrough in Nanotechnology: Soft and Biodegradable Magnetic Macrofibers for Electromechanical Sensors

Strategic Insights -

A team of researchers at Hubei University of Science and Technology has made a significant discovery in the field of nanotechnology, developing soft and biodegradable magnetic macrofibers using a stretching-twisting method applied to glycerol-plasticized bacterial cellulose (BC) strips embedded with CoFe2O4 magnetic nanoparticles. These macrofibers possess superior mechanical properties and have the potential to revolutionize the development of eco-friendly and durable electromechanical sensors for sports training and rehabilitation monitoring.

Key Takeaways:

  • The researchers developed soft and biodegradable magnetic macrofibers using a stretching-twisting method applied to glycerol-plasticized bacterial cellulose (BC) strips embedded with CoFe2O4 magnetic nanoparticles.
  • The macrofibers demonstrated superior mechanical properties, with a tensile strength of 33 MPa and a breaking strain of 3.5%, while maintaining sufficient structural integrity to sustain a 2 kg load-bearing capacity.
  • The macrofibers were fully biodegradable by cellulase within 15 days, leaving only CoFe2O4 nanoparticles that could be adsorbed and recovered by magnets.
  • The fabric-based magnetoelectric sensor constructed by integrating a coil and the magnetic fabric woven by macrofibers demonstrated exceptional electromechanical coupling efficiency across an extended operational range (0.5-10 cm coil-to-textile distance).
  • The superior distance sensitivity, stability, and durability of this sensor enabled real-time monitoring of human motion patterns under dynamic conditions.
  • The development of these macrofibers provides a promising strategy for developing eco-friendly and durable electromechanical sensors for sports training and rehabilitation monitoring.

Statistics:

  • The tensile strength of the macrofibers was 33 MPa.
  • The breaking strain of the macrofibers was 3.5%.
  • The macrofibers could sustain a 2 kg load-bearing capacity.
  • The macrofibers were fully biodegradable by cellulase within 15 days.
  • The electromechanical coupling efficiency of the sensor was exceptional across an extended operational range (0.5-10 cm coil-to-textile distance).

Sources:

  • Soft and Biodegradable Glycerol-plasticized Bacterial Cellulose/cofe 2 o 4 Magnetic Macrofibers for Fabric-based Magnetoelectric Sensors. Science China Technological Sciences, 2025;68(10).
  • Science China Technological Sciences can be contacted at: Science Press, 16 Donghuangchenggen North St, Beijing 100717, Peoples R China (www.springerlink.com/content/1674-7321)
  • Hubei University of Science and Technology, Xianning Med Coll, Sch Biomed Engn & Imaging, Xianning 437100, People's Republic of China (Additional authors: Sanming Hu, Ling Li, Cai Wang, Jun Xing, Xiao Chen, Zhijun Shi and Guang Yang)