脱硫石膏晶须增强SiO_(2)气凝胶隔热材料的制备  

Preparation of SiO_(2) aero-gel insulation material reinforced by desulfurization gypsum whisker

作　　者：冉灵伟 张小婷 李学国 赵冬冬 纪红伟 许瑞涛 汪潇 RAN Ling-wei;ZHANG Xiao-ting;LI Xue-guo;ZHAO Dong-dong;JI Hong-wei;XU Rui-tao;WANG Xiao(School of Chemistry&Materials Science,Henan University of Urban Construction,Pingdingshan 467036,China;Henan Polytechnic University,Jiaozuo 454003,China;PingdingshanXinruida Graphite Manufacturing Co.,Ltd.,Pingdingshan 467036,China)

机构地区：[1]河南城建学院材料与化工学院,河南平顶山467036 [2]河南理工大学,河南焦作454003 [3]平顶山市信瑞达石墨制造有限公司,河南平顶山467036

出　　处：《河南城建学院学报》2022年第3期71-76,共6页Journal of Henan University of Urban Construction

基　　金：河南省高等学校重点科研项目(22B430007);河南省重大公益专项(201300311000)。

摘　　要：采用不同模数水玻璃为硅源、以不同长径比的自制脱硫石膏晶须为增强材料,采用溶胶-凝胶法在常压干燥条件下制备脱硫石膏晶须增强SiO_(2)气凝胶隔热材料。通过微观形貌、力学性能及导热系数的测定与表征,分析了水玻璃模数及脱硫石膏晶须长径比对复合保温墙体材料的力学性能、隔热性能的影响。结果表明:采用模数为2.5~3.1的水玻璃和长径比为100~150的脱硫石膏晶须制备的复合墙体保温材料的热传导系数小于0.03 W/(m·K),抗折强度和抗压强度分别达到0.7 MPa、1.2 MPa以上。By sol-gel method under the condition of atmospheric drying,using different modulus of sodium silicate as silicon source and different aspect ratio of desulfurization gypsum whisker as reinforcement materials.The influences of the modulus of sodium silicate and the ratio of length to diameter of desulfurized gypsum whisker on the mechanical properties and thermal insulation properties of the composite insulation wall material were analyzed by measuring and characterizing the microstructure and thermal conductivity coefficient.The results show that when the modulus of sodium silicate is between 2.5 and 3.1 and the length-to-diameter ratio of desulfurization gypsum whisker is between 100 and 150,the thermal conductivity of composite wall insulation material can be less than 0.03 W/(m·K),and the flexural strength and compressive strength can reach more than 0.7 MPa and 1.2 MPa respectively.

关 键 词：脱硫石膏晶须 溶胶-凝胶法 水玻璃 隔热材料 

分 类 号：TU551[建筑科学—建筑技术科学]