Data for „Influence of the EPD route and surface preparation of titanium substrates on the microstructure, surface topography and usage properties of chitosan coatings incorporated in Tea Tree Oil and Terpinen-4-ol”

In this work, the electrophoretic deposition (EPD) of Tea Tree Oil (TTO)/chitosan and Terpinen-4-ol/chitosan coatings on titanium substrates with different surface preparations was examined. The deposition was performed with vertical and horizontal configurations of electrodes, called horizontal and vertical EPD, respectively, following the direction of the electric field. The data obtained showed the influence of both the electrode configuration and substrate surface preparation on the EPD process as well as coating properties, such as adhesion, morphology, microstructure, roughness, surface topography and wettability. The most promising coatings for further investigation were obtained for vertical EPD and ground titanium substrates. They were relatively homogeneous and consisted of droplets of TTO or Terpinen-4-ol embedded in chitosan. The formation of hydrogen bonds between chitosan chains and Terpinen-4-ol was detected and the responsible mechanism was indicated. The coatings exhibited high adhesion strength (class 4B or 5B), relatively low wettability (close to 80°) as well as medium roughness and surface development. Electrochemical studies demonstrated that the TTO/chitosan and Terpinen-4-ol/chitosan coatings improved the corrosion resistance of the titanium substrate in Hanks’ solution. This work showed that natural chitosan-based coatings incorporated in Tea Tree Oil and Terpinen-4-ol are promising for the antimicrobial protection of titanium implants.Terpinen-4-ol/chitosan surfaces has shown promising antibacterial properties, but it is interesting that it can be combined with chitosan to further increase this potential, besides, they had the highest biocompatibility.本研究针对经不同表面预处理的钛基底，开展了茶树油（Tea Tree Oil, TTO）/壳聚糖与4-萜品醇（Terpinen-4-ol）/壳聚糖涂层的电泳沉积（EPD）实验。实验依据电场方向，采用电极垂直与水平两种构型，分别命名为垂直电泳沉积与水平电泳沉积。所得实验数据表明，电极构型与基底表面预处理方式，均会对电泳沉积过程及涂层性能（包括附着力、形貌、微观结构、粗糙度、表面拓扑结构与润湿性）产生显著影响。经垂直电泳沉积工艺、以打磨钛基底制备的涂层，具备最佳的进一步研究潜力：该类涂层相对均匀，由嵌入壳聚糖基质的茶树油或4-萜品醇液滴构成。研究检测到壳聚糖分子链与4-萜品醇之间存在氢键相互作用，并阐明了对应的作用机制。该涂层表现出优异的附着力（4B或5B等级）、较低的润湿性（接触角接近80°），同时具备中等粗糙度与表面发育程度。电化学测试结果显示，茶树油/壳聚糖与4-萜品醇/壳聚糖涂层可有效提升钛基底在汉克斯溶液（Hanks’ solution）中的耐腐蚀性能。本研究证实，掺入茶树油与4-萜品醇的天然壳聚糖基涂层，在钛植入物的抗菌防护领域具备良好应用前景。此外，4-萜品醇/壳聚糖表面已展现出优异的抗菌性能，将其与壳聚糖复配可进一步增强其抗菌潜力；同时该类涂层还具备最高的生物相容性。