载银磷酸锆在软衬材料中的分散及改性作用

Dispersibility and modification effect of silver-zirconium phosphate in soft lining materials

目的:研究载银磷酸锆纳米无机抗菌剂在硅橡胶义齿软衬材料中的分散性及对操作性能的影响。方法:采用高剪切分散乳化方法向硅橡胶中添加载银磷酸锆。扫描电镜(SEM)观察其在硅橡胶中的分散性,SEM结合X线能谱分析仪(EDS)分析断面元素分布。测试材料调和时间、稠度、工作时间以及固化时间的变化。结果:SEM观察见纳米级无机颗粒均匀分布于硅橡胶基质内;EDS分析证实材料内不存在明显的载银磷酸锆团聚体。以不大于10%的比例添加载银磷酸锆造成了硅橡胶材料调和时间延长;而对材料的稠度、工作时间和固化时间均无显著影响。结论:采用高剪切分散乳化的方法能够使载银磷酸锆均匀分散到硅橡胶材料基质中。以实验比例添加载银磷酸锆不会明显影响硅橡胶材料的操作性能。

Objective： To investigate the dispersibility of silver-zirconium phosphate （AgZ） antimicrobial agent in silicone denture soft lining materials and the effect on operational performances of silicone soft lining materials. Methods： AgZ antimicrobial agent was added into silicone soft lining materials using the method of high shear emulsification dispersion. Dispersibility of AgZ in silicone soft lining materials was observed under SEM, and the attribution of the elements was analyzed by EDS. Operational properties of materials with and without AgZ were tested to find out the effect of AgZ on these properties, including mixing time, consistency, working time and setting time. Results： AgZ were well-distributed in silicone substrate. There was not obvious nano-agglomerates of AgZ in tested silicone materials. EDS spectra showed the mass proportion of Zr in samples was low, suggesting the main content was still silicon compound. Adding AgZ prolonged mixing time of the material. But consistency, working time and setting time of the material was not significantly affected. Conclusions： The method of high shear emulsification dispersion is capable to make AgZ distribute evenly in silicone soft lining substrate. Adding AgZ will not significantly affect operational properties of silicone denture soft lining material.