等离子处理对医用镁合金表面聚合物防护涂层的影响  

Effect of Plasma Treatment on Performance of Polybutylene Adipate Coating on Biomedical AZ31 Mg-alloy

作　　者：李鹏宇 刘子童 亢淑梅[1] 陈姗姗[2] LI Pengyu;LIU Zitong;KANG Shumei;CHEN Shanshan(School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Science and Engineering,Shenyang Ligong University,Shenyang 110159,China)

机构地区：[1]辽宁科技大学材料与冶金学院,鞍山114051 [2]中国科学院金属研究所,沈阳110016 [3]沈阳理工大学材料科学与工程学院,沈阳110159

出　　处：《材料研究学报》2023年第4期271-280,共10页Chinese Journal of Materials Research

基　　金：国家自然科学基金(51901227,81873918);中国科学院青年创新促进会项目(2019194)。

摘　　要：用匀速提拉法在氟化处理的AZ31镁合金表面制备PBA防护涂层,然后再进行等离子处理。使用扫描电子显微镜(SEM)、X射线光电子能谱(XPS)、傅里叶红外测试(FT-IR)和接触角测量仪等手段对其表征,研究了等离子处理对PBA防护涂层表面的微观形貌、物相组成以及表面润湿性的影响;用动电位极化曲线(PD)和电化学阻抗谱(EIS)表征防护涂层处理镁合金的耐蚀性;对在等离子处理前后样品表面细胞的铺展进行比较,以验证防护涂层的生物活性。结果表明,等离子处理使PBA防护涂层表面粗糙化提高了氧原子的占比,从而显著提高了防护涂层表面的浸润性;等离子处理在一定程度上降低了防护涂层处理镁合金的耐蚀性,但是与未经防护处理的AZ31镁合金和氟化处理的镁合金相比其电流密度仍高2~3个数量级,表明防护涂层能有效防护镁合金基体;等离子处理,使样品表面黏附的细胞显著增多。Polybutylene adipate(PBA)protective coating was prepared on fluorinated AZ31 Mg-alloy by uniform speed lifting method and then the coated Mg-alloys were subjected to plasma treatment with different power and time.The effect of plasma treatment on the surface morphology,phase composition and surface wettability of PBA protective coating were characterized by means of scanning electron microscope(SEM),X-ray photoelectron spectroscope(XPS),Fourier transform infrared spectroscope(FTIR)and contact angle measuring instrument.The corrosion resistance of the coated Mg-alloy was characterized by potentiodynamic polarization curve measurement and electrochemical impedance spectroscope(EIS).The biological activity of the protective coatings was verified by comparing the cells adhesion on the coating surface before and after plasma treatment.Results show that plasma treatment could increase the surface roughness of PBA protective coating,increase the oxygen atom proportion,and thereby enhance the wettability of the coating surface obviously.However,plasma treatment reduced the corrosion resistance of the PBA coated Mg-alloy to a certain extent,but its corrosion current density was 2~3 orders of magnitude lower than that of the AZ31 Mg-alloy without protective coating and the fluorinated ones.In sum,the PBA protective coating can provide effective protection for Mg-alloy substrate,and the EIS curve also showed the same results.Besides,Cell adhesion on the surface of plasma treated samples increased significantly.

关 键 词：金属材料 镁合金 防护涂层 等离子处理 润湿性 耐蚀性 

分 类 号：TG146[一般工业技术—材料科学与工程]