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<p>The fabrication of PTFE micron filaments with superior mechanical properties remains both a key research focus and a considerable challenge in the field of engineering technology. In this study, the PTFE micron filaments were successfully prepared via wet spinning and molding process by optimizing the concentration of the carrier polyethylene oxide (PEO) aqueous solution, molecular weight of the coagulation bath poly-(ethylene glycol) PEG, mass ratio of PTFE to PEO, and sintering temperature. Due to its higher hygroscopicity and surface tension compared to the spinning solution, PEG provided favorable conditions for the solidification of the PTFE/PEO primary filaments. Elemental analysis results confirmed the complete removal of PEO and PEG from the PTFE fibers after sintering. When the mass fraction of PEO is 4%, the mass ratio of PTFE to PEO is 4:1, PEG molecular weight is 200 Da, and the sintering temperature is 370&#xa0;℃, the resulting PTFE fibers display a smooth and compact Surface, with a diameter of 27.50 ± 0.66 μm. Furthermore, tensile testing reveals that the PTFE filaments achieved a tensile strength of 133.02 ± 5.39&#xa0;MPa and an elongation at break of 567.77 ± 93.67%. These findings demonstrate a feasible and efficient approach for the fabrication of high-performance PTFE micron filaments.</p>

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High-Performance Polytetrafluoroethylene Filaments Prepared via Wet Spinning from Polytetrafluoroethylene/Polyethylene Oxide Hybrid System

  • 期刊论文

  • 发表日期：

    2025年9月19日

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  • Siqi Zhou,
  • Yangfeng Guo,
  • Tingting Zhang,
  • Kangjia Ding,
  • Dongfang Wang,
  • Zihui Li,
  • Qian Li

摘要

The fabrication of PTFE micron filaments with superior mechanical properties remains both a key research focus and a considerable challenge in the field of engineering technology. In this study, the PTFE micron filaments were successfully prepared via wet spinning and molding process by optimizing the concentration of the carrier polyethylene oxide (PEO) aqueous solution, molecular weight of the coagulation bath poly-(ethylene glycol) PEG, mass ratio of PTFE to PEO, and sintering temperature. Due to its higher hygroscopicity and surface tension compared to the spinning solution, PEG provided favorable conditions for the solidification of the PTFE/PEO primary filaments. Elemental analysis results confirmed the complete removal of PEO and PEG from the PTFE fibers after sintering. When the mass fraction of PEO is 4%, the mass ratio of PTFE to PEO is 4:1, PEG molecular weight is 200 Da, and the sintering temperature is 370 ℃, the resulting PTFE fibers display a smooth and compact Surface, with a diameter of 27.50 ± 0.66 μm. Furthermore, tensile testing reveals that the PTFE filaments achieved a tensile strength of 133.02 ± 5.39 MPa and an elongation at break of 567.77 ± 93.67%. These findings demonstrate a feasible and efficient approach for the fabrication of high-performance PTFE micron filaments.