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采用蛇纹石石棉制备纳米纤维白炭黑

Preparation of Silica Nano-fibers With Chrysotile

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【作者】 李世青； 倪文； 刘波； 巩媛媛； 杨淑敏；

【Author】 Li Shiqing1,2,Ni Wen1,Liu Bo3 Gong Yuanyuan2,Yang Shumin2(1.School of Civil and Environment Engineering,University of Science and Technology Beijing,Beijing 100083;2.Technology Center, Shougang Environmental Protection Industry Department,Beijing 100041;3.College of Chemical and Emvivonmental Engineering, Shandong University of Science and Technology, Qingdao 266510,China)

【机构】 北京科技大学土木与环境工程学院； 首钢总公司环保产业事业部设计技术中心； 山东科技大学化学与环境工程学院；

【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。

【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.

【关键词】 蛇纹石石棉； 纳米纤维； 酸蚀；
【Key words】 chrysotile； nano-fiber； acid pickling；
  • 【文献出处】 中国粉体技术 ,China Powder Science and Technology , 编辑部邮箱 ,2011年03期
  • 【分类号】TB383.1
  • 【被引频次】6
  • 【下载频次】171
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