Green and Ethanol‐Resistant Polyurethane Nanofibrous Membranes Based on an Ethanol Solvent for Waterproof and Breathable Textiles,Advanced Sustainable Systems

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Green and Ethanol‐Resistant Polyurethane Nanofibrous Membranes Based on an Ethanol Solvent for Waterproof and Breathable Textiles
Advanced Sustainable Systems ( IF 6.5 ) Pub Date : 2020-06-25 , DOI: 10.1002/adsu.202000105
Wen Zhou ₁ , Xi Yu ₁ , Leitao Cao ₁ , Ming Yang ₁ , Yang Li _{1,

2} , Yang Si _{1,

2} , Jianyong Yu _{1,

2} , Bin Ding _{1,

2}

Affiliation

Waterproof and breathable (W&B) membranes can resist liquid water penetration while transmitting water vapor simultaneously, which is critical for improving the comfort and protection offered by the resulting textiles; however, it remains a substantial challenge to construct promising nontoxic W&B membranes based on green solvents. Here, a simple and scalable strategy is developed for fabricating green, W&B, polyurethane nanofibrous membranes based on an ethanol solvent via emulsion electrospinning and post thermal treatment. A novel ethanol‐soluble and spinnable polyurethane is synthesized by a stepwise polymerization reaction. Notably, green nanofibrous membranes with high hydrophobicity are obtained based on fluorinated polyurethane/ethanol emulsions, utilizing the synthesized polyurethane as the template polymer. Furthermore, the introduction of the aziridine crosslinker (tris (2‐methyl‐1‐aziridine propionate) (TTMA)) constructs the structure by post thermal treatment between TTMA and ethanol‐soluble polyurethane, resulting in the exceptional ethanol resistance of the nanofibrous membranes. The resulting membranes present integrated functionalities of a robust hydrostatic pressure of 86.2 kPa, high water vapor permeability of 13.1 kg m⁻² d⁻¹, good air permeability of 5.5 mm s⁻¹, low mass‐loss rate of 8.6 wt% after 60 min ethanol immersion, and desirable elasticity with a strain recovery ratio of 79.2%, offering strong potential for the next generation green and nontoxic protective textiles.

中文翻译：

基于乙醇溶剂的绿色和耐乙醇聚氨酯纳米纤维膜，用于防水透气织物

防水和透气（W＆B）膜可抵抗液体水的渗透，同时传递水蒸气，这对于提高所得纺织品的舒适性和保护性至关重要。然而，基于绿色溶剂构建有前景的无毒W＆B膜仍然是一项重大挑战。在这里，开发了一种简单且可扩展的策略，用于通过乳液静电纺丝和后热处理来制造基于乙醇溶剂的绿色，W＆B，聚氨酯纳米纤维膜。通过逐步聚合反应合成了一种新型的可溶于乙醇的可纺聚氨酯。值得注意的是，基于氟化的聚氨酯/乙醇乳液，利用合成的聚氨酯作为模板聚合物，获得了具有高疏水性的绿色纳米纤维膜。此外，引入氮丙啶交联剂（三（2-甲基-1-氮丙啶）（TTMA））通过在TTMA和可溶于乙醇的聚氨酯之间进行后热处理来构造结构，从而使纳米纤维膜具有出色的耐乙醇性。所得膜具有强大的静水压为86.2 kPa，高水蒸气渗透率为13.1 kg m的集成功能⁻² d ^-1，良好的透气性为5.5 mm s ^-1，在乙醇浸泡60分钟后的失重率为8.6 wt％，并具有良好的弹性，应变恢复率为79.2％，为下一代提供了强大的潜力绿色无毒的防护纺织品。

更新日期：2020-06-25

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