Polydimethylsiloxane-modified polyurethane-poly(-caprolactone) nanofibrous membranes for waterproof, breathable applications

In this study, we prepared polydimethylsiloxane (PDMS)-modified polyurethane-poly(-caprolactone) nanofibrous membranes with excellent waterproof, breathable performances via an electrospinning technique. Field emission scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and mechanical testing were used to characterize the morphologies and properties of the composite nanofibers. The fiber diameter and porous structure of the membranes were regulated by the adjustment of the temperatures of thermal treatment and the PDMS concentrations. The fibrous membranes obtained at a typical temperature of 70 degrees C possessed an optimized fibrous structure with a diameter of 514 +/- 2nm, a pore size of 0.55-0.65 mu m, and a porosity of 77.7%. The resulting nanofibrous membranes modified with 5 wt % PDMS were endowed with good waterproof properties (water contact angle=141 +/- 1 degrees, hydrostatic pressure=73.6 kPa) and a high breathability (air permeability rate=6.57L m(-2) s(-1), water vapor transmission rate=9.03kg m(-2) day(-1)). Meanwhile, the membranes exhibited robust mechanical properties with a high strength (breakage stress=11.7 MPa) and excellent thermal stability. This suggests that they would be promising candidates for waterproof, breathable applications. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46360.

在这项研究中，我们通过静电纺丝技术制备了具有优异的防水，透气性能的聚二甲基硅氧烷（PDMS）改性的聚氨酯-聚己内酯纳米纤维膜。使用场发射扫描电子显微镜，傅立叶变换红外光谱，热重分析和机械测试来表征复合纳米纤维的形貌和性能。通过调节热处理温度和PDMS浓度来调节膜的纤维直径和多孔结构。在70℃的典型温度下获得的纤维膜具有优化的纤维结构，其直径为514 +/- 2nm，孔径为0.55-0.65μm，并且孔隙率为77.7％。所得用5 wt％PDMS改性的纳米纤维膜具有良好的防水性能（水接触角= 141 +/- 1度，静水压力= 73.6 kPa）和高透气性（透气率= 6.57L m（-2） s（-1），水蒸气透过率= 9.03kg m（-2）天（-1））。同时，该膜表现出鲁棒的机械性能，具有高强度（断裂应力＝ 11.7MPa）和优异的热稳定性。这表明它们将是防水，透气应用的有希望的候选者。 （c）2018年Wiley Periodicals，Inc.J.Appl。 Polym。科学2018，135，46360。

Published: 2018

Journal ：JOURNAL OF APPLIED POLYMER SCIENCE

Impact Factor：2.668

Paper link: https://onlinelibrary.wiley.com/doi/abs/10.1002/app.46360