De Santis Serena, Rossi Edoardo, Sebastiani Marco, Sennato Simona, Bemporad Edoardo, Orsini Monica
Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University, Via Vito Volterra 62, 00146 Rome, Italy.
Engineering Department, Università Degli Studi Roma Tre, Via Della Vasca Navale 79, 00146 Rome, Italy.
Materials (Basel). 2021 Dec 31;15(1):287. doi: 10.3390/ma15010287.
Surface free energy (SFE) of titanium surfaces plays a significant role in tissue engineering, as it affects the effectiveness and long-term stability of both active coatings and functionalization and the establishment of strong bonds to the newly growing bone. A new contact-mechanics methodology based on high-resolution non-destructive elastic contacting nanoindentation is applied here to study SFE of micro- and nano-structured titanium surfaces, right after their preparation and as a function of exposure to air. The effectiveness of different surface treatments in enhancing SFE is assessed. A time-dependent decay of SFE within a few hours is observed, with kinetics related to the sample preparation. The fast, non-destructive method adopted allowed for SFE measurements in very hydrophilic conditions, establishing a reliable comparison between surfaces with different properties.
钛表面的表面自由能（SFE）在组织工程中起着重要作用，因为它会影响活性涂层和功能化的有效性及长期稳定性，以及与新生长骨建立牢固结合的能力。本文采用一种基于高分辨率无损弹性接触纳米压痕的新型接触力学方法，来研究微米和纳米结构钛表面在制备后以及暴露于空气中时的表面自由能。评估了不同表面处理在提高表面自由能方面的有效性。观察到表面自由能在几小时内随时间衰减，其动力学与样品制备有关。所采用的快速、无损方法能够在非常亲水的条件下测量表面自由能，从而在具有不同性质的表面之间建立可靠的比较。
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