中文摘要：

以生物大分子γ-聚谷氨酸（γ-PGA）、β-环糊精（β-CD）为反应单元,通过酯化反应,制备接枝共聚物（γ-PGA-g-β-CD）,用氢核磁共振（1 H-NMR）对共聚物进行结构表征。接着将γ-PGAg-β-CD在选择性溶剂中进行自组装,形成自组装胶束纳米粒子,利用纳米粒度分析仪及原子力显微镜（AFM）对胶束粒子的粒径和形貌进行表征。最后以γ-PGA-g-β-CD自组装胶束粒子溶液为电解液,结合恒电位电沉积技术,在镁合金表面制备γ-PGA-g-β-CD生物纳米涂层材料,利用傅里叶变换红外光谱（FT-IR）、扫描电子显微镜（SEM）及电化学工作站分别对涂层的化学组分、表面形貌以及电化学腐蚀性能进行表征。研究结果显示：β-CD的接枝率为28%,γ-PGA-g-β-CD自组装胶束粒子的流体动力学直径为（168±5.3）nm,所制备的γ-PGA-g-β-CD生物涂层可降低镁合金的腐蚀速率,具有较好的防护作用。

英文摘要：

Amphiphilic r-polyglutamic acid-g-β-cyelodextrin （γ-PGA-g-β-CD） copolymer was synthesized by esterification reaction between γ-polygluta-mic acid （γ-PGA） and β-eyclodextrin （β-CD）. Its structure was characterized by Nuclear Magnetic Resonance Spectrometer （1H-NMR）. The copolymer could self- assemble into colloidal particles and the particles were studied by Nanometer Particle Size Analyzer, and Atom Force Microscope （AFM）. Then, the γ-PGA-g-β-CD colloidal particle solution was used as electrolyte. Combining with electrodeposition technique, nanostructured coating was prepared on the surface of magne- sium alloy. The composition, morphology, and corrosion resistance of the coating were monitored using Fourier Transform Infrared Spectroscopy （FT-IR）, Scanning Electron Microscopy （SEM）, and corrosion test. Results show that the grafting degree of β-CD is 28 %, and the diameter of ）γ-PGA-g-β-CD colloidal particles is （168±5.3） nm. The corrosion rate of magnesium alloy with γ-PGA-g-β-CD biological coating is reduced. The coating has a good protective effect.