耐火纤维粉尘在模拟肺液中的生物溶解行为

Dissolution behaviors of refractory fiber powders in simulated lung fluid

将喷吹法制备的普通硅酸铝纤维和生物可溶耐火纤维作为研究对象,采用ICP-AES、FTIR、FESEM等测试方法对硅酸铝纤维和可溶纤维在模拟人体肺液(Gamble溶液)中的溶解行为进行了对比分析与表征。结果表明:可溶纤维表面生成了一层均匀的水化层,而在硅酸铝纤维表面没有观察到明显的水化层。通过对溶解过程中Gamble溶液pH值和离子浓度的测定可知,可溶纤维的生物溶解活性远大于硅酸铝纤维,其原因在于二者化学组成和微观结构的差别。

The dissolution behaviors in Gamble solution （simulated lung fluid） of bio-soluble refractory fiber and aluminosilicate refractory fiber were analyzed and compared using ICP-AES, FTIR,and FESEM. The results indicate that an even hydrated layer surrounding the bio-soluble refractory fiber forms after soaked in Gam- ble solution,while no any obvious hydrated layer could be observed on the aluminosilicate refractory fiber. The comparison of pH value and ion concentration of Gamble solution immersing two fibers for different du- ration shows that the dissolution activity of. bio-soluble refractory fiber is much higher than that of aluminosilicate fiber,which is from the difference of chemical composition and microstructure of the two fibers.