Thermal inter-fiber adhesion of the polyacrylonitrile/fluorinated polyurethane nanofibrous membranes with enhanced waterproof-breathable performance
Thermal inter-fiber adhesion of the polyacrylonitrile/fluorinated polyurethane nanofibrous membranes with enhanced waterproof-breathable performance
复制标题
增强防水透气性能的聚丙烯腈/氟化聚氨酯纳米纤维膜的纤维间热粘合
DOI：
10.1016/j.seppur.2015.11.046
复制
发表时间：
2016-01-28
影响因子：
8.6
通讯作者：
Ding, Bin
中科院分区：
文献类型：
--
作者：
Sheng, Junlu;Li, Yang;Ding, Bin
具有良好防水性、透气性和机械性能的大孔膜受到了广泛关注。然而，开发一种有效且成本效益高的方法来制造此类材料仍然面临巨大挑战。在本研究中，通过静电纺丝和热后处理相结合的方法制备了具有增强防水透气性能的聚丙烯腈（PAN）/氟化聚氨酯（FPU）纳米纤维复合膜。FPU的引入使纳米纤维膜具有超疏水表面（水接触角为151°），优化了孔径和孔隙率。此外，静水压力、孔隙结构和表面润湿性之间的关系已被证明符合杨 - 拉普拉斯方程。通过热后处理，原始的PAN/FPU复合膜具有物理黏附结构，从而显著提高了防水透气性能以及机械性能。由于这些作用，经过热处理的PAN/FPU复合膜表现出高静水压力（114.6 kPa）、水蒸气透过率（10.1 kg·m⁻²·d⁻¹）和良好的拉伸强度（9.4 MPa）等综合性能。此外，增强的PAN/FPU纳米纤维复合膜有很大潜力用作制造分离介质、过滤器、户外运动服装、化学防护服和军队作战服的功能材料。（C）2015爱思唯尔有限公司保留所有权利。
Macroporous membranes with robust waterproofness, breathability and mechanical properties have attracted a great deal of attention. However, great challenges still remained in developing an effective and cost-efficient method to fabricate such materials. In this study, polyacrylonitrile (PAN)/fluorinated polyurethane (FPU) nanofibrous composite membranes with enhanced waterproof and breathable performance were fabricated by combination of electrospinning and heat post-treatment. The introduction of FPU enriched the nanofibrous membranes with superhydrophobic surface with water contact angle of 151, optimized pore size and porosity. Moreover, the relationship among hydrostatic pressure, pore structure and surface wettability has proven to be in accordance with Young-Laplace equation. By employing the heat post-treatment, the pristine PAN/FPU composite membranes were endowed with physically adhesion structure, thereby significantly improved the waterproof-breathable performance as well as the mechanical property. Owing to these effects, the resulting thermal treated PAN/FPU composite membranes exhibited the integrated properties of high hydrostatic pressure (114.6 kPa), water vapor transmission rate (10.1 kg m(-2) d(-1)) and good tensile strength (9.4 MPa). Furthermore, the reinforced PAN/FPU nanofibrous composite membranes have great potential to be used as functional materials for fabricating separation media, filter, outdoor sportswear, chemical protective clothing, and army combat uniforms. (C) 2015 Elsevier B.V. All rights reserved.