期刊
APPLIED SURFACE SCIENCE ADVANCES
卷 9, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsadv.2022.100257
关键词
Coating; Mg-Ca alloys; Nanoparticles; Polycaprolactone; TiO2
类别
资金
- (FCT) [UIDB/00100/2020]
- CANMET Materials Technology Laboratory
In this study, biodegradable polymeric coatings based on polycaprolactone (PCL) were prepared with embedded TiO2 nanoparticles (NPs) to increase protectiveness and biocompatibility. The superior protectiveness of the PCL-TiO2 coating was proven through electrochemical impedance technique (EIS) evaluation. The composition of the corrosion layer was analyzed, with the PCL-TiO2 coated sample showing additional precipitation of apatites. This research provides important insights on Mg-2Ca alloys and the role of bioactive coatings on their degradation.
When seeking bone healing applications, calcium (Ca) is the preferred element for Magnesium (Mg) alloying. Unfortunately, the fast degradation rate of these alloys limits their applicability as bioresorbable implants. Biodegradable polymeric coatings based on polycaprolactone (PCL) were prepared to overcome this limitation. TiO2 nanoparticles (NPs) were further embedded in the polymeric matrix to increase the protectiveness and biocompatibility of such coatings. The degradation rate, assessed by electrochemical impedance technique (EIS) in cell culture medium, proved the superior protectiveness of the PCL-TiO2 coating. The corrosion layer was characterized by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). In the bare and PCL coated samples, the corrosion layer was composed of brucite, carbonates, and magnesium oxychloride, whereas in the PCL-TiO2 coated sample, the additional precipitation of apatites occurred. This data advances important insights on Mg-2Ca alloys and discusses the role of bioactive coatings on the degradation of this alloy.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据