School of Materials Science and Engineering, State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, Tianjin 300160, People's Republic of China.
ACS Appl Mater Interfaces. 2013 Jun 26;5(12):5430-5. doi: 10.1021/am401412a. Epub 2013 Jun 12.
In the paper, we proposed an evolution process of polyvinylidene fluoride (PVDF) macromolecular aggregation in a mixed solvent through the simple and slow gelation process at room temperature. The mixed solvent is prepared with a room-temperature solvent and a high-temperature solvent. The evolution process can be terminated by quenching and exchanging with nonsolvent in a nonsolvent coagulation bath properly, and then the vivid petal-like nanostructure and microspherulite is formed simultaneously. This hierarchical morphology endows PVDF with superhydrophobic and self-cleaning properties, which is useful to PVDF coating and membrane materials. The evolution processes are investigated through the measurements of differential scanning calorimetry (DSC), X-ray diffraction (XRD). In addition, the rheological properties of solution, dry gel and wet gel, are explored.
在本文中，我们通过在室温下进行简单且缓慢的凝胶过程，提出了聚偏二氟乙烯（PVDF）大分子在混合溶剂中的聚合演化过程。混合溶剂由室温溶剂和高温溶剂组成。通过适当的淬火和在非溶剂凝固浴中与非溶剂交换，可以终止演化过程，从而同时形成生动的花瓣状纳米结构和微球晶。这种分级形貌使 PVDF 具有超疏水和自清洁性能，这对 PVDF 涂层和膜材料非常有用。通过差示扫描量热法（DSC）和 X 射线衍射（XRD）的测量来研究演化过程。此外，还探索了溶液、干凝胶和湿凝胶的流变性能。
