干燥控制化学添加剂对SiO_2气凝胶薄膜形貌和性能的影响  

The influence of drying control chemistry additives on morphology and property of silica aerogel films

作　　者：陈高远[1,2] 魏巍[1,3] 丁当仁 宗瑟凯 张明 谢吉民[1] 

机构地区：[1]江苏大学化学化工学院,江苏镇江212013 [2]扬州大学江苏省环境材料与环境工程重点实验室,江苏扬州225002 [3]江苏大学分析测试中心,江苏镇江212013

出　　处：《功能材料》2016年第1期1207-1212,共6页Journal of Functional Materials

基　　金：江苏省科技支撑计划(工业)面上资助项目(BE2013090);镇江市工业科技计划资助项目(GY2013046;GY2014004)

摘　　要：为了快速制备平整高透过率SiO2 气凝胶薄膜,以正硅酸乙酯（TEOS）为硅源,乙二醇甲醚（EGGME）为溶剂,氟化铵为催化剂,甲酰胺（FORM）等为干燥控制化学添加剂（DCCA）,通过浸渍提拉法制备SiO2 气凝胶薄膜.采用傅里叶变换红外分析仪（FTGIR）、X 射线衍射仪（XRD）、场发射扫描电子显微镜（FESEM）、原子力显微镜（AFM）、表面孔径吸附仪对材料的结构和性能进行表征,紫外-可见分光光度计（UV-Vis）考察了材料的减反性能. 结果表明,所制SiO2 气凝胶薄膜的比表面积为890.9m^2/g,孔径集中分布在22.6nm 处,孔容集中分布在0.69cm^3/g,400-800nm 范围平均透过率可达95.71%.这种均匀、平整、致密的膜层,是理想的光学减反膜.Smooth silica aerogel thin films with high transmittance have been prepared rapidly with tetraethyl orthosilicate(TEOS)as raw materials,ethylene glycol monomethyl ether(EGME)as solvent,ammonium fluoride as catalyst,formamide(FORM)et al.as drying control chemical additive(DCCA)by dip-coating.The structure and properties of the resulting sample was characterized by Fourier transform infrared spectroscopy(FT-IR),small-angel X-ray diffraction(SAXRD),field emission scanning electron microscope(FESEM),atomic force microscope(AFM)and nitrogen adsorption desorption analysis.The optical performance of the samples was studied with ultraviolet-visible spectrophotometer(UV-Vis).It was found that:the silica aerogel film prepared possess a high specific surface area of 890.9m2/g,pore diameter distribution was about 22.6nm,pore size distribution was about 0.69cm3/g,the transmittance in the interval 400-800 nm can reach 95.71%.This style of uniform,smooth and dense aerogel thin film is an ideal optical anti-reflection film.

关 键 词：气凝胶薄膜 乙二醇甲醚 氟化铵 干燥控制化学添加剂 减反膜 

分 类 号：TB321[一般工业技术—材料科学与工程]