Structural and Mechanical Properties of Chitosan Doped with Zirconium Oxide
Keywords:Chitosan, Zirconium oxide, Ball milling, XRD, Vickers hardness
In this work, chitosan (CTS) powder has been doped with zirconium oxide (ZrO2) at different wt.% in order to improve the mechanical strength of the composites for biomedical applications. The composites have been prepared by ball milling method and the sintering has been done at three temperatures 100°C, 150°C and 180°C for 3 hours in air. The crystalline structure of the composites was confirmed by X-ray diffraction (XRD) pattern and the crystallite size of the composites decreases with increasing the percentage of ZrO2 and sintering temperature. The improvement of mechanical strength of the composites with the addition of ZrO2 in CTS polymer matrix has been investigated using micro-Vickers hardness tester and observed that the hardness of the prepared composite increased to 536 MPa when 90 wt.% CTS doped with 10 wt.% ZrO2 at 180°C of sintering temperature, demonstrating that the composites can be a potential candidate in bone tissue engineering.
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