八聚(四甲基铵)硅酸盐稳定性与脱水机理的研究
首发时间:2011-11-07
摘要:通过热重分析法初步研究了八聚(四甲基铵)硅酸盐的热稳定性,利用热重分析法和升温红外法探讨了水合八聚(四甲基铵)硅酸盐的热稳定性和失水机理。结果表明:水合八聚(四甲基铵)硅酸盐失去全部结晶水会导致其化学组成和结构的变化。同时,在此基础上获得了加热干燥法制备无水八聚(四甲基铵)硅酸盐的优化工艺条件:在135度下加热除水,不仅能够除掉体系中大部分的结晶水,还能保证八聚(四甲基胺)盐的化学组成和构型不发生变化,使其不发生分解。
关键词: 八聚(四甲基胺)硅酸盐 热稳定性 结晶水
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Study on the stability and dewatering mechanism of tetramethylammonium silicate octamer
Abstract:In this paper, the thermal stability of tetramethylammonium silicate octamer was preliminarily studied by means of TGA (thermogravimetric analysis) and FTIR at different temperature. The possible mechanism for the dewatering mechanism of tetramethylammonium silicate octamer was explored from the analyses of both TGA and TP-IR (Temperature program-IR). It's found that the composition and structure of tetramethylammonium silicate octamer changed as all its crystal water were lost. The optimal preparation conditions of tetramethylammonium silicate octamer were obtaineds: Below 135 centigrade , the most of crystal water can be removed and the chemical composition and structure of tetramethylammonium silicate octamer do not change.
Keywords: tetramethylammonium silicate octamer thermal stability cristal-water
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