Guo Longfei, Lu Shaofeng, Shao Jingfeng, Shi Wenzhao, Sun Yuanjian
School of Textile Science and Engineering, Xi'an Polytechnic University, Xi'an 710048, China.
School of Management, Xi'an Polytechnic University, Xi'an 710048, China.
Langmuir. 2024 Aug 13;40(32):16855-16866. doi: 10.1021/acs.langmuir.4c01405. Epub 2024 Aug 1.
Developing a fluorine-free, durable, high-performance waterproof breathable film for fabrics remains a formidable challenge. In this paper, a strategy for the preparation of fluorine-free, durable, and high-efficiency fabric waterproof and breathable membranes using glyceryl monostearate (GMS)/double-ended hydroxy silicone oil (HTSF)-modified waterborne polyurethane was proposed. The orderly orientation of GMS and HTSF gives the fabric excellent water-repellent properties, and the polyurethane macromolecular chain ensures strong adhesion of long-chain alkanes and silicones to the fabric surface. In this paper, the effects of different GMS contents on the stability, chemical structure, particle size, viscosity, water absorption performance, surface morphology, and XPS of a waterborne polyurethane fluorine-free waterproof and breathable membrane (GHWPU) were studied. At the same time, the application properties of GHWPU-treated fabrics, such as waterproof performance, antifouling performance, surface energy, morphology, and air permeability, were discussed. Through the analysis of SEM and XPS, it was found that the folds on the surface of the film were more and more orderly with the increasing content of GMS, and this orderly distribution of water-repellent groups endowed the film with excellent water-repellent ability. When the GMS content was 28 wt %, the finished fabrics had excellent comprehensive properties such as static contact angle of 141.6°, hydrostatic pressure of 96.7 KPa, resistance to more than 30 washes, and air permeability of 119.3 mm/s.
开发一种用于织物的无氟、耐用、高性能防水透气膜仍然是一项艰巨的挑战。本文提出了一种使用单硬脂酸甘油酯（GMS）/双端羟基硅油（HTSF）改性的水性聚氨酯制备无氟、耐用且高效的织物防水透气膜的策略。GMS和HTSF的有序取向赋予织物优异的拒水性能，而聚氨酯大分子链确保长链烷烃和硅氧烷与织物表面有很强的附着力。本文研究了不同GMS含量对水性聚氨酯无氟防水透气膜（GHWPU）的稳定性、化学结构、粒径、粘度、吸水性能、表面形态和XPS的影响。同时，讨论了经GHWPU处理的织物的应用性能，如防水性能、防污性能、表面能、形态和透气性。通过扫描电子显微镜（SEM）和X射线光电子能谱（XPS）分析发现，随着GMS含量的增加，膜表面的褶皱越来越有序，这种拒水基团的有序分布赋予了膜优异的拒水能力。当GMS含量为28 wt%时，成品织物具有优异的综合性能，如静态接触角为141.6°、静水压为96.7 KPa、耐30次以上洗涤、透气率为119.3 mm/s。
