Lorente Miguel Ángel, González-Gaitano Gustavo, González-Benito Javier
Department of Materials Science and Engineering and Chemical Engineering and Institute ITQMAAB, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganés, Spain.
Department of Chemistry, Universidad de Navarra, 31080 Pamplona, Spain.
Polymers (Basel). 2022 Mar 23;14(7):1299. doi: 10.3390/polym14071299.
The relationship between processing conditions, structure and morphology are key issues to understanding the final properties of materials. For instance, in the case of polymers to be used as scaffolds in tissue engineering, wound dressings and membranes, morphology tuning is essential to control mechanical and wettability behaviors. In this work, the relationship between the processing conditions of the solution blow spinning process (SBS) used to prepare nonwoven mats of polyethylene oxide (PEO), and the structure and morphology of the resulting materials are studied systematically, to account for the thermal and mechanical behaviors and dissolution in water. After finding the optimal SBS processing conditions (air pressure, feed rate, working distance and polymer concentration), the effect of the solvent composition has been considered. The structure and morphology of the blow spun fibers are studied as well as their thermal, mechanical behaviors and dissolution in water. We demonstrate that the morphology of the fibers (size and porosity) changes with the solvent composition, which is reflected in different thermal and mechanical responses and in the dissolution rates of the materials in water.
加工条件、结构与形态之间的关系是理解材料最终性能的关键问题。例如，在用作组织工程支架、伤口敷料和膜的聚合物的情况下，形态调控对于控制机械性能和润湿性至关重要。在这项工作中，系统地研究了用于制备聚环氧乙烷（PEO）非织造垫的溶液吹纺工艺（SBS）的加工条件与所得材料的结构和形态之间的关系，以说明其热性能、机械性能以及在水中的溶解性。在找到最佳的SBS加工条件（气压、进料速率、工作距离和聚合物浓度）后，考虑了溶剂组成的影响。研究了吹纺纤维的结构和形态以及它们的热性能、机械性能和在水中的溶解性。我们证明，纤维的形态（尺寸和孔隙率）随溶剂组成而变化，这反映在不同的热响应和机械响应以及材料在水中的溶解速率上。
