Preparation of superhydrophobic titanium surface via the combined modification of hierarchical micro/nanopatterning and fluorination

IF 2.3 4区 材料科学 Q2 Chemistry
Zhen Wang, Bing Ren
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引用次数: 8

Abstract

Adhesion of bacteria and platelets on blood-contact implants and surgical devices is one of the causes of infections and thrombus. A superhydrophobic surface serving as a protective layer can minimize adhesion and contamination due to the low surface energy. The objective of this paper is to construct a superhydrophobic surface on a titanium implant by a combination of a topological structure and chemical coating. First, a micro/nano hierarchical morphology is obtained by sandblasting, acid-etching, and anodic oxidation. Then, a low surface energy coating material (fluoroalkylsilane, as the example case in this study) is used to modify the surface further. The effects of the morphology of micro and/or nanoscales and corresponding fluorination on the wettability are investigated. The results show that a hierarchical surface with microroughness and nanotubes is successfully constructed, and the contact angle (CA) is 44.9°, indicating good hydrophilicity. Interestingly, after being modified by fluoroalkylsilane, the surface converted from hydrophilic to superhydrophobic with a CA of 151.4°. In contrast, the fluorination modification of single micro or nanofeatures cannot achieve superhydrophobicity, indicating that the micro/nanostructures may show a synergistic effect for an efficient fluorination coating later on. Overall, our results demonstrate the feasibility of achieving a superhydrophobic surface via the micro/nano topological patterning and fluorination modification. The proposed method is expected to enrich the preparation technologies of superhydrophobic titanium surfaces.

Graphic abstract

分层微/纳米图和氟化复合修饰制备超疏水钛表面
细菌和血小板在与血液接触的植入物和手术器械上的粘附是引起感染和血栓的原因之一。由于表面能低,作为保护层的超疏水表面可以最大限度地减少粘附和污染。本文的目的是通过拓扑结构和化学涂层相结合的方法在钛种植体上构建超疏水表面。首先,通过喷砂、酸蚀和阳极氧化获得微/纳米层次形貌。然后,采用低表面能涂层材料(本研究以氟烷基硅烷为例)对表面进行进一步改性。研究了微观和/或纳米尺度的形态以及相应的氟化对润湿性的影响。结果表明,成功构建了具有微孔和纳米管的层阶表面,接触角(CA)为44.9°,亲水性良好。有趣的是,经氟烷基硅烷修饰后,表面由亲水性转变为超疏水性,CA为151.4°。相比之下,单个微纳特征的氟化改性无法实现超疏水性,这表明微纳结构可能对后续高效氟化涂层表现出协同效应。总的来说,我们的研究结果证明了通过微/纳米拓扑图和氟化修饰实现超疏水表面的可行性。该方法有望丰富超疏水钛表面的制备技术。图形抽象
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Coatings Technology and Research
Journal of Coatings Technology and Research CHEMISTRY, APPLIED-MATERIALS SCIENCE, COATINGS & FILMS
CiteScore
4.40
自引率
8.70%
发文量
0
期刊介绍: Journal of Coatings Technology and Research (JCTR) is a forum for the exchange of research, experience, knowledge and ideas among those with a professional interest in the science, technology and manufacture of functional, protective and decorative coatings including paints, inks and related coatings and their raw materials, and similar topics.
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