Magnetic Electrospun Polycaprolactone (PCL) Fibers Modified with Oleic Acid-Coated Iron Oxide Nanoparticles
- 1Federal University of Santa Catarina (UFSC) , , , ,
Abstract
Magnetic polycaprolactone (PCL) fibers containing oleic acid-coated iron oxide nanoparticles (IONPs/OA) were produced by electrospinning. First, a systematic study was carried out to determine the optimal processing parameters, establishing a 20% (w/v) PCL concentration, an applied voltage of 20 kV, a needle-to-collector distance of 22 cm, and a flow rate of 2 mL/h as the most suitable parameters. Homogeneous neat PCL fibers with an average diameter of 543 ± 88 nm were obtained under these conditions. Subsequently, different IONPs/OA concentrations (5, 10, and 20 wt %) were incorporated, leading to a progressive increase in fiber diameter, with a maximum of 961 ± 201 nm for the 20 wt % formulation. Magnetic measurements confirmed superparamagnetic behavior at room temperature for all composite fiber samples, with a maximum saturation magnetization (Ms) of 6.1 ± 0.1 emu/g for the 20 wt % formulation. Thermogravimetric analysis revealed that the incorporation of IONPs/OA into the fibers decreased the degradation temperature by approximately 63 °C compared to neat PCL. Finally, water contact angle (WCA) measurements revealed a progressive increase in fiber hydrophobicity, reaching a maximum WCA of 135°. These results indicate that the produced fibers exhibited promising morphological, compositional, thermal and magnetic properties for potential future biomedical applications, such as drug delivery and magnetic hyperthermia.
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BibTeX
@article{morales2026magnetic,
title = {{Magnetic Electrospun Polycaprolactone (PCL) Fibers Modified with Oleic Acid-Coated Iron Oxide Nanoparticles}},
author = {Angie N. Morales and Danay M. Jaime and Guilherme M. O. Barra},
journal = {ACS Omega},
year = {2026},
month = oct,
doi = {10.1021/acsomega.6c07387},
url = {https://pubs.acs.org/acsodf/article/11/41/63477/5445904/Magnetic-Electrospun-Polycaprolactone-PCL-Fibers},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Magnetic Electrospun Polycaprolactone (PCL) Fibers Modified with Oleic Acid-Coated Iron Oxide Nanoparticles
AU - Angie N. Morales
AU - Danay M. Jaime
AU - Guilherme M. O. Barra
PY - 2026
DA - 2026/10/07
JO - ACS Omega
DO - 10.1021/acsomega.6c07387
UR - https://pubs.acs.org/acsodf/article/11/41/63477/5445904/Magnetic-Electrospun-Polycaprolactone-PCL-Fibers
AB - Magnetic polycaprolactone (PCL) fibers containing oleic acid-coated iron oxide nanoparticles (IONPs/OA) were produced by electrospinning. First, a systematic study was carried out to determine the optimal processing parameters, establishing a 20% (w/v) PCL concentration, an applied voltage of 20 kV, a needle-to-collector distance of 22 cm, and a flow rate of 2 mL/h as the most suitable parameters. Homogeneous neat PCL fibers with an average diameter of 543 ± 88 nm were obtained under these conditions. Subsequently, different IONPs/OA concentrations (5, 10, and 20 wt %) were incorporated, leading to a progressive increase in fiber diameter, with a maximum of 961 ± 201 nm for the 20 wt % formulation. Magnetic measurements confirmed superparamagnetic behavior at room temperature for all composite fiber samples, with a maximum saturation magnetization (Ms) of 6.1 ± 0.1 emu/g for the 20 wt % formulation. Thermogravimetric analysis revealed that the incorporation of IONPs/OA into the fibers decreased the degradation temperature by approximately 63 °C compared to neat PCL. Finally, water contact angle (WCA) measurements revealed a progressive increase in fiber hydrophobicity, reaching a maximum WCA of 135°. These results indicate that the produced fibers exhibited promising morphological, compositional, thermal and magnetic properties for potential future biomedical applications, such as drug delivery and magnetic hyperthermia.
SN - 2470-1343
ER -