推荐一个综合化学实验——纳米SiO_(2)复合隔热材料的制备  

A Comprehensive Chemical Experiment:Preparation of Nano Silica Composite Insulation

作　　者：许华杰 郭举 潘胜芳 车瑞 韩思璐 何传雨 徐钰和 XU Hua-jie;GUO Ju;PAN Sheng-fang;CHE Rui;HAN Si-lu;HE Chuan-yu;XU Yu-he(Moutai Institute,Guizhou Renhuai 564500,China)

机构地区：[1]茅台学院,贵州仁怀564500

出　　处：《广州化工》2023年第24期146-148,共3页GuangZhou Chemical Industry

基　　金：贵州省高等学校教学内容和课程体系改革项目(2020256);茅台学院“金课”建设项目(myjk2020007)。

摘　　要：纳米二氧化硅复合隔热材料因其导热系数低、密度低、孔隙率高等特点而得到广泛应用。以此为基础设计了一个研究型的综合化学实验,以偏硅酸钠为原料,在盐酸和硫酸的作用下进行水解,涂布到无纺布基材上,基材通过热水老化和溶剂置换后,在三甲基氯硅烷和六甲基二硅氧烷的混合液中进行改性,最后通过常压干燥获得纳米二氧化硅复合隔热材料。该实验的开展可加强理论知识与工程实践的融合,培养学生自主学习和分析与解决问题的能力。Nano silica composite insulation is widely used because of their low thermal conductivity,low density and high porosity.On this basis,a research-based comprehensive chemical experiment was designed,sodium metasilicate was hydrolyzed under the action of hydrochloric acid and sulfuric acid,and coated on the non-woven fabric,After hot water aging and solvent replacement,the nano silica aerogel was modified in the mixture of trimethylchlorosilane and hexamethyldisiloxane,finally,the nano silica composite insulation was obtained by atmospheric drying.The experiment could strengthen the integration of theoretical knowledge and engineering practice,and cultivate students ability of autodidacticism,analyzing and solving problems.

关 键 词：纳米二氧化硅 复合隔热材料 综合化学实验 

分 类 号：G644[文化科学—高等教育学] O6-041[文化科学—教育学]