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近等原子比TiNi形状记忆合金(SMAs)作为植入体具有良好的生物医学应用价值,但合金的腐蚀会产生一些不利影响,同时Ni~+析出会引起细胞和组织的过敏、中毒等反应。因此,TiNi SMAs的生物安全性及其表面改性方法被诸多学者研究。本文就TiNi SMAs表面改性技术进行了综合阐述,并提出未来发展的可能性。目前等离子体注入及沉积复合处理,氧化处理,羟基磷灰石等涂层技术,TiO_2纳米管表面改性方法等能够提高TiNi SMAs的耐蚀及生物相容性。未来纳米技术和生物技术相结合可能创造具有科学和应用价值的新材料。
Nearly atomic ratio TiNi shape memory alloys (SMAs) have good biomedical application value as implants. However, the corrosion of the alloy will have some adverse effects. At the same time, Ni ~ + precipitation will cause allergy and poisoning of cells and tissues. Therefore, the biological safety of TiNi SMAs and its surface modification methods have been studied by many scholars. In this paper, TiNi SMAs surface modification techniques were comprehensively described, and proposed the possibility of future development. At present, the plasma injection and deposition composite treatment, oxidation treatment, hydroxyapatite and other coating technology, TiO 2 nanotube surface modification methods can improve the corrosion resistance and biocompatibility of TiNi SMAs. The combination of nanotechnology and biotechnology in the future may create new materials of scientific and application value.