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。

关键词： 蛇纹石石棉;纳米纤维;酸蚀

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. 

Keywords：chrysotile； nano-fiber ； acid pickling