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      저자 : Fatemeh Kashani‑Asadi‑Jafari (검색결과 1 건)
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        Magnetic-Field-Assisted Emulsion Electrospinning System: Designing, Assembly, and Testing for the Production of PCL/Gelatin Core–Shell Nanofibers

        Fatemeh Kashani‑Asadi‑Jafari,Ahmadreza Parhizgar,Afra Hadjizadeh 한국섬유공학회 2023 Fibers and polymers Vol.24 No.2

        There are different methods for producing core–shell nanofibers, one of which is the emulsion electrospinning method. Thestability of the emulsion during electrospinning is one of the most critical factors in the quality of the fibers. In this study, amagnetic-field-assisted emulsion electrospinning system was designed, built, and tested to keep the emulsion stable withoutadditives or sonication. Polycaprolactone (PCL) 10 wt. % in dichloromethane (DCM) for the shell and gelatin 2.5 wt. % inwater for the core was used. Scanning electron microscope (SEM) image of samples with different weight ratios of componentsboth with and without using the magnetic-field-assisted emulsion electrospinning system at different rotational speedswas investigated. Transition electron microscope (TEM) images of the sample with a ratio of 1/10 (gel/PCL) at differentrotational speeds were studied. The fibers were finally analyzed by Fourier transform infrared (FTIR) and tensile strengthmachine. According to the results, there was no change in the bonds in the materials after electrospinning. The designedsystem improved the fiber texture and reduced its structural problems significantly. By increasing the rotation speed of themagnet from 700 to 900 rpm, an improvement in fiber morphology and uniformity in diameter was observed. The compositionof gelatin/PCL with a ratio of 1/10 was selected as the optimal condition. The spun nanofibers in these conditionshad a uniform structure without the bead, and the presence of both polymers uniformly in the fibers was shown. Finally,the magnetic-field-assisted emulsion electrospinning system successfully held the emulsion stable during electrospinningwithout additives.

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