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Nanotechnology

Breakthrough in Nanofiber Technology: Fluorine-Free, Superhydrophobic Membranes Developed

Strategic Insights

— 1 min read

Zhengzhou, People's Republic of China - Researchers from Zhongyuan University of Technology have made significant advancements in nanofiber technology, developing a fluorine-free, superhydrophobic membrane with exceptional waterproofness and breathability. This innovation addresses the pressing need for environmentally friendly and high-performance waterproof and breathable nanofiber membranes across various markets. The breakthrough relies on a simple one-step electrospinning technique, eliminating the use of hazardous fluorine-containing compounds and ensuring material stability through a pure solvent system.

Key Takeaways:

  • The researchers utilized fluorine-free polyurethane (PU) and stearic acid (SA) as raw materials, with dimethylformamide (DMF) employed as a single solvent, to fabricate superhydrophobic PU/SA nanofiber membranes.
  • The PU/SA nanofiber membranes exhibit exceptional waterproofness, with an ultrahigh hydrostatic pressure resistance of 102.57 kPa, alongside excellent breathability, as indicated by a water vapor transmission (WVT) rate of 5.034 kg m d.
  • The membranes also possess good air permeability (22.06 mm s) and robust mechanical properties, including a tensile strength of 7.17 MPa and an elongation at break of 74.80%.
  • The PU/SA nanofiber membrane demonstrates excellent antifouling and self-cleaning properties.
  • The research has significant potential for applications in outdoor apparel.

Statistics:

  • Hydrostatic pressure resistance: 102.57 kPa
  • Water vapor transmission (WVT) rate: 5.034 kg m d
  • Air permeability: 22.06 mm s
  • Tensile strength: 7.17 MPa
  • Elongation at break: 74.80%
  • Contact angle: 150°

Sources:

  • "Fluorine-free, Superhydrophobic Polyurethane and Stearic Acid Waterproof and Breathable Electrospun Nanofiber Membrane with Excellent Hydrostatic Pressure Resistance" - Langmuir, 2025
  • Zhongyuan University of Technology, Textile and Garment Industry of Research Institute - Zhongyuan University of Technology, Zhengzhou 450007, People's Republic of China
  • Shenpeng Hu, Yunhe Zhang, Yang Liu, Weijie Zhang, Wen Sun, Dongxiang Li, Zhenhua Cui, Wenjing Yu, Dongxu Lu, and Jianxin He (co-authors)
  • Gaihuan Ren, corresponding author
  • Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA (publisher of Langmuir)

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