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    Please use this identifier to cite or link to this item: http://asiair.asia.edu.tw/ir/handle/310904400/112996


    Title: Effects of ultrasonic treatment and current density on the properties of hydroxyapatite coating via electrodeposition and its in vitro biomineralization behavior
    Authors: Li, Ting-Ting;Li, Ting-Ting;Ling, Lei;Ling, Lei;Lin, Mei-Chen;Lin, Mei-Chen;Jiang, Qian;Jiang, Qian;Lin, Qi;Lin, Qi;樓靜文;Lou, Ching-Wen;林佳弘;Lin, Jia-Horng
    Contributors: 時尚設計學系
    Keywords: Electrodeposition;Hydroxyapatite;Ultrasonic;Current density;Crystal growth;Braid
    Date: 2019-12
    Issue Date: 2020-09-07 13:55:32 (UTC+8)
    Publisher: 亞洲大學
    Abstract: In this study, ultrasonic-assisted electrodeposition is used to prepare uniform and smooth hydroxyapatite (HA) coating on the surface of the braids, which can be potentially applied as biodegradable bone scaffolds. During the electro-deposition process, the ultrasonic power (0 W and 20 W) and current density (2.5, 5.0, and 7.5 mA/cm2) are altered in order to evaluate their influences on the properties of HA coating over the braid surface. The field emission scanning electron microscope (FE-SEM) images show that the crystals growth stages of HA include spherical particles, plate-like and needle-like crystals when electro-deposited for 15, 30, 45, and 60 min. In particular, when electro-deposited for 60 min, the needle-like structure of HA coatings shows a significant increase in density as a result of increasing the current density or the employment of ultrasonic treatment. Transmission electron microscope (TEM) results show that when the current density increases from 2.5 mA/cm2 to 7.5 mA/cm2, the grain size decreases from 413.65 ± 63.12 nm to 264.56 ± 65.33 nm. With the aid of ultrasonic treatment, the HA coating demonstrates a calcium‑phosphorus (Ca/P) ratio that resembles that of the human skeleton being 1.67. The X-ray Diffraction (XRD) results show the highest crystallinity reaches 73.52% at 7.5 mA/cm2-20 W. The cavitation effect of ultrasonic can improve the roughness of HA coating distinctively. Finally, the 7-day immersion into simulated body fluid (SBF) demonstrated a denser and finer apatite precipitation on the HA coating fabricated by ultrasonic-assisted electrodeposition. Therefore, this study provides a feasible ultrasonic-assisted electrodeposition method that yields a good morphology of bioactive substances coating over braid or other rugged deposition substrate for potential degradable bone scaffolds.
    Relation: Materials Science & Engineering C-Materials for Biological Applications
    Appears in Collections:[時尚設計學系] 期刊論文

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