Influence of Chemical Conditions on the Nanoporous Structure of Silicate Aerogels

Influence of Chemical Conditions on the Nanoporous Structure of Silicate Aerogels
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DOI:
10.3390/ma3010704
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发表时间:
2010-01-26
期刊:
影响因子:
3.4
通讯作者:
Sinkó K
Sinkó K
中科院分区:
材料科学3区
文献类型:
--
作者:
Sinkó K

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二氧化硅或各种硅酸盐气凝胶的特征在于高度多孔、开孔、低密度结构。合成参数通过改变水解和缩合过程的动力学和机理来影响三维多孔结构。许多研究已经表明多孔材料的结构可以通过合成条件的变化(例如,前体、催化剂和表面活性剂的类型;水/前体的比率;浓度;介质pH;和溶剂)。本文综述了溶胶-凝胶法制备硅酸盐气凝胶过程中化学条件对气凝胶纳米孔结构的影响。
Silica or various silicate aerogels can be characterized by highly porous, open cell, low density structures. The synthesis parameters influence the three-dimensional porous structures by modifying the kinetics and mechanism of hydrolysis and condensation processes. Numerous investigations have shown that the structure of porous materials can be tailored by variations in synthesis conditions (e.g., the type of precursors, catalyst, and surfactants; the ratio of water/precursor; the concentrations; the medium pH; and the solvent). The objectives of this review are to summarize and elucidate the effects of chemical conditions on the nanoporous structure of sol-gel derived silicate aerogels.
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