聚己内酯-氧化石墨烯复合涂层对 Ti-6Al-4V 合金的表面改性

Paria Fazlali, Mahrokh Tahernejad, Leila Biglari, Mahla Eslami
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引用次数: 0

摘要

本研究采用电纺丝技术在 Ti6AL4V 合金上合成了聚己内酯-氧化石墨烯纳米复合涂层,并对其进行了表征。为了获得厚度均匀的涂层,研究了电纺丝涂层的有效参数,包括溶剂、聚合物浓度和生物陶瓷比例。此外,还采用电化学极化测试法评估了涂层的细胞毒性和腐蚀性。为了对涂层进行表征,还使用了扫描电子显微镜等测试手段。结果表明,随着氧化石墨烯用量的增加,纳米纤维的直径减小。聚己内酯纳米纤维的直径为 1.3 微米,加入氧化石墨烯后直径增加到 56.0 微米。腐蚀试验结果表明,纳米复合涂层的使用增加了涂层尺寸的耐腐蚀性。纳米复合涂层由聚己内酯纳米纤维和氧化石墨烯组成,可模仿细胞外基质的行为,提高钛表面的生物和抗菌性能。迄今为止,还没有关于在钛上制造这种纤维状纳米复合涂层的报道。细胞毒性测试结果表明,纳米复合涂层的使用有效降低了支架的细胞毒性。通过制作聚己内酯-氧化石墨烯纳米纤维复合涂层,钛合金的生物和抗菌性能将得到改善,其耐腐蚀性能也可能发生变化。在本项目中,主要问题是通过电纺丝方法提取在钛表面制造复合涂层的有效参数,并对所制造的涂层进行表征和生物评估。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Surface Modification of Ti-6Al-4V Alloy by Polycaprolactone-Graphene Oxide Composite Coating
In this research, Polycaprolactone-graphene oxide Nanocomposite coating was synthesized and characterized by Electrospinning on Ti6AL4V alloy. In order to create a uniform coating with optimal thickness, the effective parameters of Electrospinning coating, including solvent, polymer concentration, and bioceramic percentage, were investigated. Also, the cytotoxicity and corrosion tests were evaluated by the electrochemical polarization test method of the created coating in comparisons and different percentages. In order to characterize the coating, a test such as a scanning electron microscope was used. The results showed that as much as the amount of Graphene oxide is increased, the diameter of Nanofibers decreases. The diameter of Polycaprolactone Nanofibers was 1.3 micrometers, which increases to 56.0 micrometers by adding Graphene oxide. The results of the corrosion test showed that the use of Nano composite coating increased the corrosion resistance to the size of the coating. The nanocomposite coating consists of polycaprolactone nanofibers and graphene oxide, which mimics the behavior of the extracellular matrix and improves the biological and antibacterial behavior of the titanium surface. So far, there has been no report on the creation of this fibrous nanocomposite coating on titanium. The results of the cytotoxicity test showed that the use of Nanocomposite coating has effectively reduced the cytotoxicity on the scaffolds. By creating a polycaprolactone-graphene oxide nanofiber composite coating, the biological and antibacterial properties of titanium alloy will be improved and its corrosion resistance will probably change. In this project, the main question is extracting effective parameters in creating a composite coating on titanium surface by electrospinning method and characterizing and biological evaluation of the created coating.
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