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Fluorinated Polyurethane-Based Enameled Wires with a Low Friction Coefficient.

Xiaoguang Jiao1, Zhongtai Feng2, Qingze Jiao1,3

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Fluorinated polyurethane (FPU) coatings significantly reduce the friction coefficient of enameled wires, offering enhanced performance. These advanced coatings also demonstrate improved mechanical properties and hydrophobicity.

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Area of Science:

  • Materials Science
  • Polymer Chemistry

Background:

  • Polyurethanes are versatile polymers with diverse applications.
  • Improving surface properties like friction and adhesion is crucial for material performance.

Purpose of the Study:

  • To synthesize and characterize fluorinated polyurethane (FPU) with varying fluorine content.
  • To evaluate the performance of FPU as a coating for enameled wires.

Main Methods:

  • FPU synthesis using perfluoropolyether glycols, poly(propylene glycol), isophorone diisocyanate, and 1,4-butanediol.
  • Structural and molecular weight analysis via Fourier transform infrared spectroscopy and gel permeation chromatography.
  • Friction coefficient and adhesion testing of FPU-coated copper wires.

Main Results:

  • FPU-coated wires exhibited a significantly lower friction coefficient (0.095) compared to non-fluorinated polyurethane (0.149).
  • The FPU coatings demonstrated good mechanical performance and increased breakdown voltages.
  • The FPU coatings displayed excellent hydrophobic and oleophobic characteristics.

Conclusions:

  • Fluorinated polyurethane coatings offer a viable solution for reducing friction on enameled wires.
  • FPU coatings enhance the overall performance and durability of enameled wires.
  • The hydrophobic and oleophobic nature of FPU contributes to its protective properties.