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首页> 外文会议>International Conference on Multi-Material Micro Manufacture >Manufacturing and Characterization of Coaxial Microfibers with Different Molecular Weights Using Melt Electrospinning Technique
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Manufacturing and Characterization of Coaxial Microfibers with Different Molecular Weights Using Melt Electrospinning Technique

机译：用熔融静电纺丝技术制造和表征不同分子量的同轴微纤维

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A core-shell microfiber can be fabricated using a coaxial electrospinning technique. The coaxial electropinning technique is prevalent in solution electrospinning to fabricate nanofibers. However, the coaxial technique using melt electrospinning setup to fabricate microfibers is novel. The coaxial microfibers can be used to improve the current filtration or biomedical applications due to more flexibility in structure design. This work focuses on fabricating coaxial microfibers by using 10k Mn Polycaprolactone (PCL) in the shell and 45k Mn PCL in the core. The fabricated coaxial microfibers are analysed by comparing to the original 10k Mn PCL and 45k Mn PCL microfibers. The cross sectional images of the coaxial microfiber are taken using a scanning electron microscope to verify the presence of two phases. Then, microfiber sheets were fabricated with 10k M_n, 45k M_n, and 45k/10k core-shell coaxial PCL microfibers. The microfiber sheet is then machined with a femtosecond laser machining system into a tensile testing specimen, which is tested on a tensile testing machine to observe the stress-strain characteristics of coaxial microfibers. The results conclude that coaxial microfiber sheet had higher ultimate tensile strength than the other molecular weighted PCL and the strain was in a region between 10k M_n and 45k M_n PCL. However, this result needs further verification, and thus is currently being confirmed through additional experiments. As of our knowledge, we are the first to fabricate coaxial microfibers of 10k and 45k M_n PCL using a melt coaxial electrospinning technique.
机译：可以使用同轴电纺丝技术制造芯壳微纤维。同轴电疏化技术在静电纺丝中普遍存在于制造纳米纤维的溶液中。然而，使用熔融静电纺丝设置制造微纤维的同轴技术是新颖的。由于结构设计的柔韧性，同轴微纤维可用于改善电流过滤或生物医学应用。这项工作侧重于通过在壳体中使用10kmmn聚己内酯（PCL）和45Kmn PCL在芯中制造同轴微纤维。通过比较原始的10KmN PCL和45K MN PCL微纤维来分析制造的同轴微纤维。使用扫描电子显微镜拍摄同轴微纤维的横截面图像以验证两相的存在。然后，用10KM_N，45KM_N和45K / 10K核 - 壳同轴PCL微纤维制造超细纤维片。微纤维片材然后用飞秒激光加工系统加工成拉伸测试样品，这是拉伸试验机上进行测试，以观察同轴微纤维的应力 - 应变特性。结果得出结论，同轴微纤维片具有比其他分子量的抗拉强度更高的抗拉强度，并且该菌株在10KM_N和45KM_N PCL之间的区域中。但是，此结果需要进一步验证，因此目前正在通过额外的实验确认。从我们的知识，我们是第一个使用熔融同轴电纺丝技术制造10K和45K M_N PCL的同轴微纤维。

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