黏土气凝胶/混凝土复合材料的制备与性能研究  

Preparation and Thermal Insulation of Clay Aerogel/Concrete Composite

作　　者：李洪彦 杨乾 刘洪丽 刘彤 王冬梅 张鹏宇 LI Hongyan;YANG Qian;LIU Hongli;LIU Tong;WANG Dongmei;ZHANG Pengyu(School of Chemical Engineering,Tianjin University,Tianjin 300192,China;Tianjin Construction Materials Group (Holding) Co. Ltd.,Tianjin 300051,China;College of Materials Science and Engineering,Tianjing Chengjian University ,Tianjin 300384,China;Tianjin Institute of Building Materials Science,Tianjin 300381,China)

机构地区：[1]天津大学化工学院,天津300192 [2]天津市建筑材料集团(控股)有限公司,天津300051 [3]天津城建大学材料科学与工程学院,天津300384 [4]天津市建筑材料科学研究院,天津300381

出　　处：《东莞理工学院学报》2019年第5期74-78,共5页Journal of Dongguan University of Technology

基　　金：天津市自然科学基金(18JCQNJC03000);中国博士后科学基金面上项目(2019M651052)

摘　　要：介绍了一种使用Gemini表面活性剂改性的埃洛石(HNTs)气凝胶,利用HNTs气凝胶取代部分水泥制备混凝土,通过改性使得气凝胶颗粒在混凝土中稳定存在,以起到改善混凝土保温性能的作用。通过傅立叶变换红外光谱仪,N2吸附-解吸等温线,扫描电子显微镜等对制备好的混凝土样品进行了表征。结果表明,表面活性剂成功吸附在HNTs表面,说明改性成功。混凝土的孔隙率随着HNTs气凝胶含量的增加而增加,导热率随着HNTs气凝胶含量的增加而降低,对混凝土的保温性能有了显著提升。In this paper, a kind of halloysite(NHTs) aerogel modified by Gemini surfactant is introduced. The HNTs aerogel is used to replace part of cement to prepare concrete.The aerogel particles exist stably in concrete by modification, so as to improve the thermal insulation performance of concrete. Characterizations of the samples were investigated by Fourier transform infrared spectrometer, N2 adsorption-desorption isotherms, scanning electron microscope and so on. The results indicated that the surfactant successfully attaches to the surface of the HNTs aerogels. The porosity of concrete increase with the increase of HNTs aerogels contents. The thermal conductivity of concrete becomes smaller as the contents of HNTs aerogels increase.

关 键 词：埃洛石气凝胶 Gemini活性剂 混凝土 热导率 

分 类 号：TB303[一般工业技术—材料科学与工程]