Micromorphology evolution and properties of strontium-zinc-phosphate chemical conversion coatings on Ti:Effect of Zn2+ and Ca2+ in the reaction solution

IF 5.7 2区 材料科学 Q2 CHEMISTRY, PHYSICAL
Kangle Tang , Qian Wang , Zihan Xu , Yibo Li , Kuizhao Zhang , Lujia Xie , Cheng Chang , Shenqiang Qiu , Guiyong Xiao
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Abstract

Bioactive strontium zinc phosphate (SrZn2(PO4)2, SZP) coatings have attracted much attention in the surface modification of medical metal materials. And the micro-morphologies of that coating have an important influence on cellular function and osseointegration. This study prepared a variety of micro-morphology SrZn2(PO4)2 coatings on titanium (Ti) using the phosphate chemical conversion (PCC) method. The effect of Zn2+ concentration in the reaction solution on the micro-morphology and properties of the SZP coatings was studied. The results showed that the SZP crystal size increased with increasing concentration of Zn2+ in the reaction solution, which also led to a more regular morphology of the coatings on Ti. A corresponding increase in the thickness, hydrophilicity, and roughness of the SZP coatings was also observed because of the increase in Zn2+ concentration. The bond strength of the coatings showed an initial increase followed by a slight decline with rising Zn2+ concentration. Moreover, the addition of Ca2+ in the reaction solution also significantly affected the micro-morphology of the SZP coatings, changing the crystal morphology from rectangular blocky to shuttle-shaped lamellar. The wettability, bonding strength, porosity, and ion release rate of the coatings were also increased because of the addition of Ca2+. This study elucidated the mechanism of Zn2+ and Ca2+ ions in the reaction solution on the morphology and properties of SZP coatings. The findings provided a novel approach to controlling and optimizing the micro-morphology of phosphate coatings to enhance their osteogenic activity.

Abstract Image

磷酸锶锌化学转化膜对Ti的微观形貌演变及性能:反应溶液中Zn2+和Ca2+的影响
具有生物活性的磷酸锶锌(SrZn2(PO4)2, SZP)涂层在医用金属材料的表面改性中备受关注。该涂层的微观形态对细胞功能和骨整合有重要影响。本研究采用磷酸盐化学转化(PCC)方法在钛(Ti)表面制备了多种微观形貌的SrZn2(PO4)2涂层。研究了反应溶液中Zn2+浓度对SZP涂层微观形貌和性能的影响。结果表明:随着反应溶液中Zn2+浓度的增加,SZP晶粒尺寸增大,镀层形貌也更加规正;由于Zn2+浓度的增加,SZP涂层的厚度、亲水性和粗糙度也相应增加。随着Zn2+浓度的升高,镀层的结合强度呈先升高后略有下降的趋势。此外,反应溶液中Ca2+的加入也显著影响了SZP涂层的微观形貌,使SZP涂层的晶体形态从矩形块状变为梭状片层状。Ca2+的加入也提高了涂层的润湿性、结合强度、孔隙度和离子释放率。本研究阐明了反应溶液中Zn2+和Ca2+离子对SZP涂层形貌和性能的影响机理。研究结果为控制和优化磷酸盐涂层的微观形态以增强其成骨活性提供了新的途径。
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来源期刊
Surfaces and Interfaces
Surfaces and Interfaces Chemistry-General Chemistry
CiteScore
8.50
自引率
6.50%
发文量
753
审稿时长
35 days
期刊介绍: The aim of the journal is to provide a respectful outlet for ''sound science'' papers in all research areas on surfaces and interfaces. We define sound science papers as papers that describe new and well-executed research, but that do not necessarily provide brand new insights or are merely a description of research results. Surfaces and Interfaces publishes research papers in all fields of surface science which may not always find the right home on first submission to our Elsevier sister journals (Applied Surface, Surface and Coatings Technology, Thin Solid Films)
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