【摘 要】
：
A hydrothermal deposition method was utilized to fabricate Ca-P composite coating induced by the layer-by-layer (LbL) assembled polyvinylpyrrolidone/deoxyribonucleic acid (PVP/DNA)20 multilayer on AZ31 alloy.The surface morphology and compositions were ch
【机 构】
：
College of Materials Science and Engineering,Shandong University of Science and Technology,Qingdao 2
论文部分内容阅读
A hydrothermal deposition method was utilized to fabricate Ca-P composite coating induced by the layer-by-layer (LbL) assembled polyvinylpyrrolidone/deoxyribonucleic acid (PVP/DNA)20 multilayer on AZ31 alloy.The surface morphology and compositions were characterized by SEM,EDS,FTIR and XRD.Besides,the corrosion resistance and degradation behavior of the coating were tested via electro-chemical polarization,impedance spectroscopy and immersion measurements.Results show that the main components of Ca-P coatings are hydroxyapatite,Ca3(PO4)2 and Mg3(PO4)2·nH2O.The LbL-assembled DNA and PVP promote the adsorption of Ca-P deposits on the sample surface,and structures and functional groups of the polyelectrolyte in the outermost layer are the primary influencing factor for the induction of the Ca-P coating.Carboxyl groups have the best biomineralization effect among all related functional groups.The enhanced corrosion resistance and adhesion highlight a promising use of (PVP/DNA)20-induced Ca-P coatings in the field of biomedical magnesium alloys.
其他文献
In a nuclear powerplant,the rotary equipment,such as a pump directly fitted with hanger in the piping system,experiences torsional and bending loads.Higher crack growth rate occurs because of this torsional load in addition to the bending load.Hence,it is
Porosity parameters are one of the structural properties of the extracellular microenvironment that have been shown to have a great impact on the cellular phenotype and various biological activities such as diffusion of fluid,initial protein adsorption,pe
摘要：随着社会经济的发展，电气自动化控制技术已经成为了保障我国电力系统稳定运行的一项重要技术手段，其控制设备越来越广泛地被应用于在我们生活中，然而，人们对电气自动化控制设备的稳定性和安全性也有了更高层次的要求。文章主要针对电气自动化控制设备的稳定性进行分析探究，并给出了有效的措施。 关键词：稳定性、控制设备、探究 中图分类号：TN830文献标识码： A 引言 深入探讨电气自动化控制设备的稳
3D metal printing process has attracted increasing attention in recent years due to advantages,such as flexibility and rapid prototyping.This study aims to investigate the orientation effect of electropolishing characteristics on different surfaces of 316
Assessing the durability of concrete is of prime importance to provide an adequate service life and reduce the repairing cost of structures.Freeze-thaw is one such test that indicates the ability of concrete to last a long time without a significant loss
构建信息化、数字化、智能化的智慧应急新模式,旨在解决目前我国突发公共卫生事件应对过程中快速响应机制、多部门统一协调协作、信息交互流程等方面存在的薄弱环节以及应急管理效率低下等问题,全面提升公共安全领域应对与处置能力。本文采用描述性研究法,较为全面地分析了国外公共卫生应急体系建设与智慧应急发展现状,准确梳理了我国卫生应急管理的需求、现状和存在问题;提出了我国公共卫生智慧应急体系的中长期发展目标、重大任务、实现技术途径。研究建议,规划实施卫生应急国家生物综合监测预警建设重大工程,制定和修订新型智慧化卫生应急相
Unlike fossil fuels,hydrogen is a renewable and clean energy source.It is available in a large amount and spreads throughout the world.When reacting with oxygen,hydrogen releases energy to produce water as the only product.Hence,hydrogen is a promising al
The design and development of multifunctional nano-drug delivery systems (NDDSs) is a solution that is expected to solve some intractable problems in traditional cancer treatment.In particular,metal-organic frameworks (MOFs) are novel hybrid porous nanoma
This study aims to investigate hydrofracturing in double-layered soil through theoretical and experimental analysis,as multilayered soils where the difference in mechanical properties exists are generally encountered in practical engineering.First,an anal
This study reports on the effects of multilayer graphene oxide (MGO) on compressive strength,flexural strength,and microstructure of cement mortar.The cement mortar was prepared with type P.Ⅱ.52.5 Portland cement,standard sand,and MGO.Four mixes were prep