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[篇名]
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天然纤蛇纹石制备纤维状纳米氧化硅研究
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[著者]
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段涛; 彭同江
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[机构]
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西南科技大学矿物材料及应用研究所,四川 绵阳 621010
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[中文关键词]
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纤维状纳米氧化硅; 纤蛇纹石; 酸浸取; 制备
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[外文关键词]
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nano-fibrous
silica chrysotile sulfuric acid soaking
preparation
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[分类号]
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[刊名]
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非金属矿
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[出版时间]
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2008年1月
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[来源]
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VOL31,NO.1._25—27
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[中文摘要]
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以石棉尾矿为原料,通过水洗、筛选、净化提纯等工艺得到纤蛇纹石石棉束,以十二烷基苯磺酸钠为表面分散剂对其高速乳化分散,再对充分分散的纤蛇纹石石棉纤维进行酸浸等处理,获得了直径为20~40nm管状的、无定形纤维状纳米氧化硅。研究了煅烧、分散等工艺对石棉酸浸程度以及酸浸产物形貌的影响。实验表明,纤蛇纹石所特有的管状结构在制备过程中起到了"模板"作用,并在酸浸过程中被所生成的纳米氧化硅所继承,从而形成了管状纤维纳米氧化硅。
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[外文摘要]
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Asbestos
gangue as raw materials, the nanowires silica
tube of 20~40nm in diameter was prepared by following process: primarily bunchy
chrysotile was obtained by bathing, filtering and
refining from asbestos waste; secondly, chrysotile
was dispersed by emulsification machine in high speed, SDBS as dispersant
added; lastly chrysotile fiber was treated by
acid and the namo-fibrous silica was obtained.
The influences of sulfuric acid soaking, calcination
and dispersing on product were investigated. Experimental results indicated
that the unique tube structure of chrysotile
played a template role in preparation of nanowires
silica,which is
inherited by the resultant SiO2 in
sulfuric acid soaking course.
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