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<p>In this study, fluorine-free Si-based polyurethane (Si-PU) membranes were prepared via electrospinning. The electrospinning parameters were optimized in the presence of sodium chloride (NaCl) as an electrolyte, thereby affecting jet formation, stability, and nanofiber fineness. Four different amounts of Si nanoparticles (SNPs) (0.5, 1, 1.5, and 2 wt% in relation to PU) were dispersed in the polymer solution, and the effect on the static water contact angle, water vapor transfer, and the mechanical properties of the membranes was investigated. The results indicated that under the applied condition, 2 wt% of SNPs resulted in the highest hydrophobicity (105 ± 9°), appropriate breathability (2100 ± 68&#xa0;g m<sup>− 2</sup> day<sup>− 1</sup>), and the least fiber diameter (232 ± 57&#xa0;nm). The fibrous membrane obtained from PU, NaCl, and SNPs could be a promising candidate for various applications including protective clothing, sportswear and etc.</p>

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Hydrophobic breathable electrospun nanofibrous PU membranes: an insight into the effect of Si nanoparticles and NaCl

  • 期刊论文

  • 发表日期：

    2025年12月23日

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  • Melika Khajehamidi,
  • Ali Akbar Gharehaghaji,
  • Tina Harifi

摘要

In this study, fluorine-free Si-based polyurethane (Si-PU) membranes were prepared via electrospinning. The electrospinning parameters were optimized in the presence of sodium chloride (NaCl) as an electrolyte, thereby affecting jet formation, stability, and nanofiber fineness. Four different amounts of Si nanoparticles (SNPs) (0.5, 1, 1.5, and 2 wt% in relation to PU) were dispersed in the polymer solution, and the effect on the static water contact angle, water vapor transfer, and the mechanical properties of the membranes was investigated. The results indicated that under the applied condition, 2 wt% of SNPs resulted in the highest hydrophobicity (105 ± 9°), appropriate breathability (2100 ± 68 g m− 2 day− 1), and the least fiber diameter (232 ± 57 nm). The fibrous membrane obtained from PU, NaCl, and SNPs could be a promising candidate for various applications including protective clothing, sportswear and etc.