疏水处理气相二氧化硅填料对单瓶酸蚀-冲洗型牙科粘结剂的影响。
Effect of hydrophobic surface treated fumed silica fillers on a one-bottle etch and rinse model dental adhesive.
机构信息
Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, MO, USA.
Department of Chemical Engineering, University of Missouri, Columbia, MO, USA.
出版信息
J Mater Sci Mater Med. 2017 Dec 23;29(1):10. doi: 10.1007/s10856-017-6015-3.
The objective of this study was to investigate the effect of hydrophobic surface treatment to fumed silica fillers on the bonding performance of a one-bottle etch and rinse model dental adhesive. In this study, 0.5-5 wt.% of Filler 1 and Filler 2 were loaded into BisGMA/HEMA model dental adhesive. Filler 1 was not treated, while Filler 2 was surface treated with a dimethyl silicone fluid making the silica extremely hydrophobic. The prepared adhesives were characterized through measurements of viscosity, degree of conversion, and water contact angle. SEM was utilized to observe the microstructures at the bonding interface. Micro-tensile bond strength (µTBS) test coupled with fracture surface analysis was carried out to study the mechanical properties. From the experiment, the loadings of Filler 2 is favorable to the improvement of µTBS. The µTBS of experimental adhesive with 1 wt.% Filler 2 increased 42% compared to the model adhesive without filler, and 24% compared to the experimental adhesive with 1 wt.% Filler 1. The effectively penetration of the hydrophobic compositions of the adhesive is considered as the main reason that leads to the increased bond strength, which was proved by the contact angle measurement and SEM observations.
本研究旨在探讨疏水处理对气相法二氧化硅填料在单瓶酸蚀-冲洗型牙科胶粘剂粘结性能的影响。在本研究中，将 0.5-5wt.%的填料 1 和填料 2 负载到 BisGMA/HEMA 模型牙科胶粘剂中。填料 1 未进行处理，而填料 2 用二甲基硅氧烷流体进行表面处理，使二氧化硅变得极疏水。通过测量粘度、转化率和水接触角来对制备的胶粘剂进行特性描述。利用扫描电子显微镜观察粘结界面的微观结构。通过微拉伸粘结强度 (µTBS) 测试结合断口分析来研究力学性能。实验结果表明，填料 2 的负载有利于提高 µTBS。与不含填料的模型胶粘剂相比，含有 1wt.%填料 2 的实验胶粘剂的 µTBS 提高了 42%，与含有 1wt.%填料 1 的实验胶粘剂相比，提高了 24%。胶粘剂中疏水性成分的有效渗透被认为是导致粘结强度增加的主要原因，这一点通过接触角测量和 SEM 观察得到了证实。
Zotero 插件