【摘要】 研究一种制备高品质纳米白炭黑的方法,以蛇纹石石棉为原料,经过酸蚀处理后,制备纳米纤维白炭黑,采用X射线衍射和扫描电镜分析不同浓度下酸蚀的产物,研究不同酸浓度对产物的成分及微观形貌的影响。结果表明:蛇纹石石棉纤维表面存在大量的OH-,在酸性条件下,OH-易于与H+反应而导致Mg2+裸露,在H+足够的情况下,MgO也被完全溶出,残余固体是一种SiO2纯度很高的纳米纤维状物质,SiO2的质量分数为72.63%,而且在一定程度上继承了蛇纹石石棉的纤维状结构。更多还原

【Abstract】 A method of producing silica nano-fibers was researched.The fibers were made from chrysotile by acid pickling.By XRD and SEM,the micro-mechanism and component of the products were observed.The results showed that there were a plenty of OH-on the surface of chrysotile fibers.OH-was easily acted with H+ in acid,and then Mg2+ was exposited.If the acid was superfluous,MgO was removed completely.The leaved solid was almost pure SiO2 with mass fraction of 72.63%,which was mainly silica nano-fibers.The silica nano-fibers had the same shape of chrysotile fibers.更多还原