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Natural Kelp (Laminaria japonica) Hydrogel with Anisotropic Mechanical Properties, Low Friction and Self-Cleaning for Triboelectric Nanogenerator

  • 0Taizhou Institute of Science and Technology, Nanjing University of Science and Technology, Taizhou 225300, China.
Gels (basel, Switzerland) +

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August 28, 2025

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August 28, 2025

View abstract on PubMed

Summary

This summary is machine-generated.

Kelp exhibits unique superoleophobic and low-friction surface properties. Its mechanical strength and conductivity significantly improve with metal ion adsorption, enabling applications like self-powered sensors.

Area Of Science

  • Materials Science
  • Biomaterials Engineering
  • Surface Science

Background

  • Kelp, a natural hydrogel, is widely used in food but its material properties remain underexplored.
  • Understanding kelp's surface and mechanical characteristics is crucial for novel applications.

Purpose Of The Study

  • To investigate the surface and mechanical properties of kelp.
  • To explore the influence of metal ions on kelp's properties.
  • To demonstrate kelp's potential in energy harvesting and sensing applications.

Main Methods

  • Surface property analysis (superoleophobicity, self-cleaning, friction coefficient).
  • Mechanical testing to evaluate anisotropic properties (tensile strength, toughness) with and without metal ions.
  • Fabrication and testing of a triboelectric nanogenerator (TENG) and a self-powered tactile sensor using kelp.

Main Results

  • Kelp surface displays superoleophobicity, self-cleaning, and a low friction coefficient (<0.1).
  • Kelp exhibits anisotropic mechanical properties, with superior strength and toughness along the growth direction (H) compared to the vertical direction (V).
  • Metal ion adsorption significantly enhances mechanical properties and ionic conductivity, leading to a kelp-based TENG with notable output (30 V open-circuit voltage).

Conclusions

  • Kelp possesses unique surface and anisotropic mechanical properties that can be tuned by metal ion adsorption.
  • Kelp is a promising renewable material for developing advanced applications such as self-powered tactile sensors and triboelectric nanogenerators.
  • This study offers new insights into kelp's potential beyond the food industry.

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