Laser-Assisted Melt Electrospinning of Poly(L-lactide-co-ɛ-caprolactone): Effect of Laser Power on Spinning Behavior and Fiber Structure Formation 


Vol. 25,  No. 1, pp. 35-46, Jan.  2024
10.1007/s12221-023-00385-4


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  Abstract

Poly(L-lactide-co-ε-caprolactone) (PLCL) nanofiber webs is important materials for medical uses; however, the application of solution electrospinning for production has an issue with remaining solvents. Therefore, we applied the solvent-free laserheated melt-electrospinning process (LES). The fabrication of thinner fibers through the LES is known to be rather difficult. To overcome this difficulty, a detailed investigation of the effect of laser power on fiber formation behavior was carried out. With the irradiation of the laser, the temperature of the raw fiber emerging from the nozzle increased. Subsequently, a jet ejected from the cone apex was further elongated towards a collector. With increasing the laser power, the swelling portion became smaller and shifted upstream and the temperature increased from 206 to 300 °C. Ejection of a single jet was observed when the laser power was low, whereas several jets were ejected spontaneously at the higher power. The molecular orientation of prepared fibers increased with the laser power, and the fibers started to exhibit crystalline diffractions in the WAXD analysis. The crystallinity also increased with the laser power. Enhancement of the fiber thinning at a high laser power was attributed to the reductions of viscosity and surface tension, whereas the diameter reduction with the increase of laser power was suppressed after the starting of the ejection of multiple jets at higher laser power. At an optimum condition, the homogeneous fibers with the lowest diameter of 500 nm and its CV of 16% were obtained.

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  Cite this article

[IEEE Style]

M. Takasaki, Z. Hou, H. Kobayashi, K. Tanaka, W. Takarada, T. Kikutani, M. Takasaki, "Laser-Assisted Melt Electrospinning of Poly(L-lactide-co-ɛ-caprolactone): Effect of Laser Power on Spinning Behavior and Fiber Structure Formation," Fibers and Polymers, vol. 25, no. 1, pp. 35-46, 2024. DOI: 10.1007/s12221-023-00385-4.

[ACM Style]

Midori Takasaki, Zongzi Hou, Haruki Kobayashi, Katsufumi Tanaka, Wataru Takarada, Takeshi Kikutani, and Midori Takasaki. 2024. Laser-Assisted Melt Electrospinning of Poly(L-lactide-co-ɛ-caprolactone): Effect of Laser Power on Spinning Behavior and Fiber Structure Formation. Fibers and Polymers, 25, 1, (2024), 35-46. DOI: 10.1007/s12221-023-00385-4.

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pISSN : 1229 - 9197
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