Wang Zijia, Chang Yawen, Jia Siyang, Liu Fujuan
National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, 199 Ren-Ai Road, Suzhou 215123, China.
Materials (Basel). 2024 Aug 21;17(16):4135. doi: 10.3390/ma17164135.
In this study, polyimide (PI) and polysulfonamide (PSA) were used as base materials, and polyethylene glycol (PEG) was added to successfully prepare PI/PSA/PEG nanofiber membranes through electrospinning technology. Subsequently, water etching was performed on the membranes, utilizing the water solubility of PEG to form the rough wrinkled structure, further enhancing the surface hydrophobicity. The experimental results showed that under the conditions of a spinning voltage of 10 kV, PI/PSA mass fraction of 15 wt.%, and PEG-to-PI/PSA mass ratio of 1/3, the obtained fiber membranes exhibit a uniform morphology (an average diameter of 0.73 µm) and excellent hydrophobicity (the initial water contact angle (WCA) reaching 130.4°). After PEG water etching, the surface of the PI/PSA/PEG hydrophobic membranes formed the rough wrinkled structure, which not only improved their mechanical properties but also further enhanced their hydrophobicity (the initial WCA increasing to 137.9°). Hence, fiber membranes are expected to have broad application prospects in fields such as waterproofing and moisture permeability.
在本研究中，聚酰亚胺（PI）和聚磺酰胺（PSA）被用作基础材料，并添加聚乙二醇（PEG），通过静电纺丝技术成功制备了PI/PSA/PEG纳米纤维膜。随后，利用PEG的水溶性对膜进行水蚀刻，形成粗糙的褶皱结构，进一步提高表面疏水性。实验结果表明，在纺丝电压为10 kV、PI/PSA质量分数为15 wt.%、PEG与PI/PSA质量比为1/3的条件下，所制备的纤维膜具有均匀的形态（平均直径为0.73 µm）和优异的疏水性（初始水接触角（WCA）达到130.4°）。经过PEG水蚀刻后，PI/PSA/PEG疏水膜表面形成了粗糙的褶皱结构，这不仅改善了其机械性能，还进一步提高了疏水性（初始WCA增加到137.9°）。因此，纤维膜有望在防水和透湿等领域具有广阔的应用前景。
