摘要
近等原子比NiTi合金具有独特的力学性能,如形状记忆效应、超弹性和高阻尼效应,已成为一种新型的整形外科植入材料。但是,镍元素在生理条件下可能溶出,诱发毒性和炎性反应,限制了其在临床的广泛应用。分类介绍了几种可行的表面改性方法,均能有效地抑制镍离子的溶出,改善NiTi合金的抗腐蚀性和生物相容性,包括表面惰性涂层化、表面氧化、表面活性化和表面接枝大分子等。
Nearly equiatomic nickel-titanium alloy has emerged as a new type of orthopedic implants due to its unique mechanical properties of shape memory effect, super-elasticity and high damping capacity. However, a critical concern is that nickel may be release from the implants in physiological environment and nickel is responsible for toxic and allergic responses, limiting its wide use in clinical applications. In this paper, several feasible surface modification methods restraining nickel dissolved effectively and improving in corrosion resistance and biocompatibility are delicately classified and analyzed, which include surface inertia coatings treatment, surface oxidation treatment, surface bioactive treatment and surface immobilizing macromolecules.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2007年第5期79-81,共3页
Materials Reports
基金
天津市高等学校科技发展基金项目(20041018)
关键词
镍钛合金
表面改性
抗腐蚀性
生物相容性
nickel-titanium alloy, surface modification, corrosion resistance, biocompatibility
