Wei Zhenzhen, Pan Zhijuan, Li Faxue, Yu Jianyong
College of Textile and Clothing Engineering, Soochow University Suzhou 215123 China
National Engineering Laboratory for Modern Silk, Soochow University Suzhou 215021 China.
RSC Adv. 2018 Jan 3;8(3):1378-1384. doi: 10.1039/c7ra12068k. eCollection 2018 Jan 2.
Tailoring the wetting properties of nanofibrous membranes and endowing them with expected wettability provides new ways in extending the application field of these materials. In this study, we first performed the fabrication of poly(butylenes succinate--terephthalate) (PBST) composite nanofibrous membrane with cyclodextrin polymer (CDP) using a combination of electrospinning and heating processes. Then, the morphologies, crystallization and mechanical properties of the PBST composite membrane were investigated. It was found that the CDP was uniformly dispersed on the PBST nanofibers instead of merely covering the surface of the membrane. Moreover, the introduction of additives brought about a decreased crystallinity and tensile strength of the resultant membrane due to its restraining role in the crystallization of PBST. Furthermore, the wettability of the PBST composite membranes with various amounts of additives was explored and the evolution of water spread on top of the membranes was also recorded. The membrane became superhydrophilic from hydrophobic upon increasing the amount of additives and the water droplet could completely spread within 0.2 s, which was attributed to the enlarged roughness and increased contact area of CDP on the nanofibers. A comparison between the two fabrication methods used for PBST composite nanofibrous membranes is also presented and studies on the preparation and wetting properties may shed light on polymer composite membranes that exhibit potential application in more fields.
调整纳米纤维膜的润湿性并赋予其预期的润湿性为扩展这些材料的应用领域提供了新途径。在本研究中，我们首先结合静电纺丝和加热工艺制备了聚（丁二酸丁二醇酯 - 对苯二甲酸酯）（PBST）与环糊精聚合物（CDP）的复合纳米纤维膜。然后，研究了PBST复合膜的形态、结晶和力学性能。发现CDP均匀地分散在PBST纳米纤维上，而不仅仅覆盖在膜的表面。此外，添加剂的引入导致所得膜的结晶度和拉伸强度降低，这是由于其对PBST结晶的抑制作用。此外，还探索了不同添加剂含量PBST复合膜的润湿性，并记录了水滴在膜表面的铺展过程。随着添加剂含量的增加，膜从疏水性变为超亲水性，水滴可在0.2 s内完全铺展，这归因于纳米纤维上CDP粗糙度的增大和接触面积的增加。还对用于PBST复合纳米纤维膜的两种制备方法进行了比较，对其制备和润湿性的研究可能为在更多领域具有潜在应用的聚合物复合膜提供启示。
