Liu Xiaoli, Zou Xiaobin, Ge Zhen, Zhang Wenguo, Luo Yunjun
School of Materials Science and Engineering, Beijing Institute of Technology Beijing 100081 China
RSC Adv. 2019 Oct 2;9(54):31357-31369. doi: 10.1039/c9ra06462a. eCollection 2019 Oct 1.
In the fabric finishing field, the water repellents have received increasing interest in recent years and the development of a fluorine-free water repellent has become an attractive prospect. In this study, glyceryl monostearate-modified waterborne polyurethanes (GWPUs) with a branched structure act as water repellents, and were prepared from toluene diisocyanate, trimethylolpropane, hydroxypropyl polydimethylsiloxane, -methyldiethanolamine, and glyceryl monostearate (GMS). The water repellency and other properties of GWPUs with different GMS content, such as water resistance, hydrophobicity, and air permeability, were studied. The results show that the GMS content for optimum water repellency was 20 wt%, which achieved the highest score (100 points) in a water repellency evaluation. As for the water repellent ability with a GMS content of 20 wt%, the water absorption of a piece of film was reduced to 7.80%, while the water contact angle of terylene coated by the water repellent rose to 148.0°.
在织物整理领域，近年来拒水剂受到了越来越多的关注，开发无氟拒水剂已成为一个具有吸引力的前景。在本研究中，具有支链结构的单硬脂酸甘油酯改性水性聚氨酯（GWPU）用作拒水剂，由甲苯二异氰酸酯、三羟甲基丙烷、羟丙基聚二甲基硅氧烷、N-甲基二乙醇胺和单硬脂酸甘油酯（GMS）制备而成。研究了不同GMS含量的GWPU的拒水性及其他性能，如耐水性、疏水性和透气性。结果表明，获得最佳拒水性的GMS含量为20 wt%，在拒水性评价中达到了最高分（100分）。对于GMS含量为20 wt%的拒水剂，一片薄膜的吸水率降低到7.80%，而经该拒水剂涂层的涤纶的水接触角升至148.0°。
