纳米SiO_2气凝胶的制备及保温隔热性应用研究进展  

Preparation and Application of Nano-Silica Aerogels in Thermal Insulation:an Overview

作　　者：舒心[1] 刘朝辉[1] 丁逸栋 杨宏波[1] 罗平[1] SHU Xin;LIU Zhaohui;DING Yidong;YANG Hongbo;LUO Ping(Department of Chemistry and Material Engineering,Logistic Engineering University,Chongqing 401311)

机构地区：[1]后勤工程学院化学与材料工程系,重庆401311

出　　处：《材料导报》2018年第5期788-795,共8页Materials Reports

基　　金：全军后勤科研计划项目(BY115C007);重庆市自然科学基金(cstc2014jcyjA50026)

摘　　要：从SiO_2气凝胶的隔热机理出发,归纳了降低其导热系数的有效途径,概述了在溶胶-凝胶过程中硅源的甄选原则及开发趋势,总结了当前常用湿凝胶干燥工艺的优缺点并提出改进方法,着重介绍了当前保温隔热领域SiO_2气凝胶复合材料的种类及应用现状,最后对SiO_2气凝胶材料的发展前景进行了展望。Based on the thermal insulation mechanism of silica aerogels,the effective ways to reduce the thermal conductivity are summarized.The selection principle and development trend of silicon source in the sol-gel process are summed up.Simultaneously,the advantages and disadvantages of commonly-used wet gel drying process in silica aerogels are introduced and some improvement methods are put forward.Then elaborated the types and applications of silica aerogels in the field of thermal insulation.Finally,the development prospects of silica aerogels are prospected.

关 键 词：保温隔热 SIO2气凝胶 复合材料 

分 类 号：TB34[一般工业技术—材料科学与工程]