Ablation characteristics of electrospun core-shell nanofiber by femtosecond laser

ChangKyoo Park; Ruipeng Xue; John J. Lannutti; Dave F. Farson

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Ablation characteristics of electrospun core-shell nanofiber by femtosecond laser

机译：飞秒激光电纺核-壳纳米纤维的烧蚀特性

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This study examined the femtosecond laser ablation properties of core and shell polymers their relationship to the ablation characteristics of core-shell nanofibers. The single-pulse ablation threshold of bulk polycaprolactone (PCL) was measured to be 2.12 J/cm~2 and that of bulk polydimethylsiloxane (PDMS) was 4.07 J/cm~2. The incubation coefficients were measured to be 0.82 ± 0.02 for PCL and 0.53 ± 0.03 for PDMS. PDMS-PCL core-shell and pure PCL nanofibers were fabricated by electrospinning. The energy/volume of pure PCL and PDMS-PCL core-shell nanofiber ablation was investigated by measuring linear ablation grooves made at different scanning speeds. At large scanning speed, higher energy/volume was required for machining PDMS-PCL nanofiber than for PCL nanofiber. However, at small scanning speed, comparable energy/volume was measured for PDMS-PCL and PCL nanofiber ablation. Additionally, in linear scanned ablation of PDMS-PCL fibers at small laser pulse energy and large scanning speed, there were partially ablated fibers where the shell was ablated but the core remained. This was attributed to the lower ablation threshold of the shell material.

机译：这项研究检查了飞秒激光对核和壳聚合物的烧蚀性能，以及它们与核-壳纳米纤维的烧蚀特性之间的关系。测量的本体聚己内酯（PCL）的单脉冲消融阈值为2.12J / cm〜2，本体聚二甲基硅氧烷（PDMS）的单脉冲消融阈值为4.07J / cm〜2。测得的孵育系数对于PCL为0.82±0.02，对于PDMS为0.53±0.03。 PDMS-PCL核壳和纯PCL纳米纤维是通过静电纺丝制造的。通过测量在不同扫描速度下制作的线性消融槽，研究了纯PCL和PDMS-PCL核-壳纳米纤维消融的能量/体积。在较大的扫描速度下，加工PDMS-PCL纳米纤维所需的能量/体积要比PCL纳米纤维更高。但是，在较小的扫描速度下，可测量PDMS-PCL和PCL纳米纤维消融的可比能量/体积。此外，在PDMS-PCL纤维以较小的激光脉冲能量和较大的扫描速度进行线性扫描烧蚀的过程中，部分烧蚀的纤维剥蚀了外壳，但保留了芯。这归因于壳材料的较低的烧蚀阈值。

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来源
《Materials science & engineering》 |2016年第8期|232-239|共8页
作者
ChangKyoo Park; Ruipeng Xue; John J. Lannutti; Dave F. Farson;
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作者单位

Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA;

Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA;

Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA;

Department of Materials Science and Engineering, The Ohio State University, 1248 Arthur E Adams, Columbus, OH 43221, USA;

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正文语种 eng
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关键词
Femtosecond laser ablation; Electrospinning; Core-shell nanofiber; Ablation threshold; Incubation coefficient;

机译：飞秒激光烧蚀;电纺;核壳纳米纤维;烧蚀阈值;孵化系数;

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1. Ablation characteristics of electrospun core-shell nanofiber by femtosecond laser [J] . Park ChangKyoo, Xue Ruipeng, Lannutti John J., Materials science & engineering, C. Materials for Biogical applications . 2016,第Null期

机译：飞秒激光电纺核-壳纳米纤维的烧蚀特性
2. Micropatterning and characterization of electrospun poly(ε-caprolactone)/gelatin nanofiber tissue scaffolds by femtosecond laser ablation for tissue engineering applications [J] . Lim Y.C., Johnson J., Fei Z., Biotechnology and Bioengineering . 2011,第1期

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3. Structuring electrospun polycaprolactone nanofiber tissue scaffolds by femtosecond laser ablation [J] . Hae woon Choi, Jed K. Johnson, Jin Nam, Journal of Laser Applications . 2007,第4期

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4. Micropatterning and Characterization of Electrospun PCL/gelatin Nanofiber Tissue Scaffolds by Femtosecond Laser Ablation [C] . Yong Chae Lim, Jed Johnson, Zhengzheng Fei, International Congress on Applications of Lasers Electro-Optics . 2009

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5. Development of Precise Femtosecond Laser Micromachining Processes for Metals and Electrospun Nanofibers. [D] . Park, ChangKyoo. 2015

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8. Ultraviolet Femtosecond and Nanosecond Laser Ablation of Silicon: Ablation Efficiency and Laser-Induced Plasma Expansion [R] . Zong, X., Mao, X., Greif, R., 2005

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Ablation characteristics of electrospun core-shell nanofiber by femtosecond laser

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