Herein, the electrospinning method, as an effective approach, was utilized to fabricate poly (ε‐caprolactone)‐based polyurethane (PCL‐based PU) fibers. PCL was synthesized by ring‐opening polymerization, and characterized by proton nuclear magnetic resonance (¹H NMR) and Fourier‐transform infrared (FTIR) spectroscopies. Afterward, PU was prepared by step‐growth polymerization. The effects of solution concentration and solvent type on fibers' diameter were investigated. Scanning electron microscopy (SEM) images revealed that the optimum solution was N, N‐dimethylformamide(DMF): chloroform with a ratio of 60:40. In addition, results showed that bead‐less nanofibers could be achieved by a concentration of 5 w/v% (polymer to solvent). Various optimum practical parameters, such as applied voltage, feeding rate, and needle‐to‐collector distance, were obtained and compared with the results of response surface methodology (RSM). On the other hand, the mechanical evaluations indicated that the porous structure of scaffolds caused them to possess lower mechanical properties, as well as shape fixity ratios than those of bulk samples.

中文翻译：

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通过响应面法在最佳电纺条件下制备电纺形状记忆聚氨酯纤维

在这里，静电纺丝法是一种有效的方法，用于制造聚（ε-己内酯）基聚氨酯（PCL基PU）纤维。PCL是通过开环聚合反应合成的，其特征是质子核磁共振（¹1 H NMR）和傅立叶变换红外（FTIR）光谱学。然后，通过逐步生长聚合制备PU。研究了溶液浓度和溶剂类型对纤维直径的影响。扫描电子显微镜（SEM）图像显示，最佳溶液为N：N-二甲基甲酰胺（DMF）：氯仿，比例为60:40。此外，结果表明，浓度为5 w / v％（聚合物与溶剂的浓度）可以实现无珠的纳米纤维。获得了各种最佳实用参数，例如施加的电压，进给速度和针头到收集器的距离，并将其与响应面方法（RSM）的结果进行了比较。另一方面，力学评估表明，支架的多孔结构使其具有较低的力学性能，