Influence of Preparation Parameters on Structure and Performance of Silica Aerogel: A Review

被引：0
|
作者：
Guo S. [1 ]
Wu H. [1 ,2 ]
Yang L. [2 ]
Liu Y. [1 ,2 ]
Yang J. [1 ]
机构：
[1] School of Civil Engineering, Guangzhou University, Guangzhou
[2] Guangdong Key Laboratory of Building Efficiency and Application Techniques, Guangzhou University, Guangzhou
来源：
Wu, Huijun (wuhuijun@tsinghua.org.cn) | 2017年 / Cailiao Daobaoshe/ Materials Review卷 / 31期
关键词：
Aerogels; Factors; Preparation; Sol-gel method;
D O I：
10.11896/j.issn.1005-023X.2017.07.006
中图分类号：
学科分类号：
摘要：
Silica aerogels are a new type of nanoporous materials with excellent properties. It has been the hot spot of research and development in thermal, optical, acoustic and electrical and other disciplines at home and abroad. The preparation of silica aerogels can be divided into three general steps: gel preparation, aging of the gel and post-processing. Its structure and properties are associated with the preparation parameters. In this paper, the influence of preparation parameters on structure and performance of silica aerogel are reviewed. For the gel preparation, the silicon source type, sol proportion, pH value, reaction temperature and hydrolysis time are summarized. For aging of the gel, aging temperature and time are summarized. For post-processing, drying solvent species, modifier types and concentrations, modified temperature and time are summarized. Through exploring the preparation parameters which affect structure and performance of silica aerogels, and constantly optimizing the preparation technology, it will have great guiding significance for promoting scale production and applications of silica aerogels. © 2017, Materials Review Magazine. All right reserved.
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页码：38 / 44and53
页数：4415
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