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首页> 外文期刊>Journal of Dental Research: Official Publication of the International Association for Dental Research >Improved filler-matrix coupling in resin composites.
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Improved filler-matrix coupling in resin composites.

机译：改进了树脂复合材料中的填料-基体偶联。

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Ineffective silane coupling between filler and matrix within dental composites is prone to accelerated in vivo degradation. In this study, we examined to what degree a procedure involving chemical decontamination of filler prior to silanization could improve the filler-matrix bonding, and thus the physico-mechanical properties, of composites. X-ray photoelectron spectroscopy revealed that filler-matrix coupling largely depended upon siloxane bridge (Si-O-Si) formation between the silica surface and the silane molecule, rather than on intermolecular bonding between adjacent silane molecules. Pre-silanization decontamination based upon boiling silica in 0.05-5% sodium peroxodisulfate, followed by ultrasonic rinsing in acetone, most effectively decontaminated filler. Consequently, it significantly improved the bonding of silane molecules to silanol groups at the silica surface. Experimental composites produced following pre-silanization decontamination of filler revealed a diametral tensile strength that was resistant to degradation by thermocycling.
机译：牙科复合物中填充剂和基质之间无效的硅烷偶联易于加速体内降解。在这项研究中，我们研究了在硅烷化之前对填料进行化学净化的程序可以在多大程度上改善填料与基体的结合，从而改善复合材料的物理机械性能。 X射线光电子能谱显示，填料-基质的偶联主要取决于二氧化硅表面和硅烷分子之间的硅氧烷桥（Si-O-Si）形成，而不是相邻硅烷分子之间的分子间键合。基于在0.05-5％的过二硫酸钠中沸腾二氧化硅而进行的预硅烷化去污，然后在最有效去污的填料丙酮中超声清洗。因此，它显着改善了硅烷分子与二氧化硅表面的硅烷醇基的键合。在对填料进行预硅烷化去污后生产的实验复合材料显示出径向抗张强度，可抵抗热循环降解。

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