| 二氧化硅气凝胶最佳制备工艺的确定 |
| |
| 引用本文： | 李华,霍丽,张纷云.二氧化硅气凝胶最佳制备工艺的确定[J].广州化工,2012,40(14):54-56. |
| |
| 作者姓名： | 李华 霍丽 张纷云 |
| |
| 作者单位： | 1. 中州大学化工食品学院,河南郑州,450044
2. 中国铝业中州公司技术中心,河南焦作,454171 |
| |
| 基金项目： | 河南省教育厅自然科学研究项目资助 |
| |
| 摘 要： | 以正硅酸乙酯为原料,先采用溶胶-凝胶法制备湿凝胶,然后浸泡在反应溶液中进行老化,再利用正己烷进行溶剂交换,三甲基氯硅烷进行表面改性,最终获得轻质多孔二氧化硅气凝胶。并通过正交试验,确定了制备凝胶的最佳工艺条件是:pH=5,TEOS∶乙醇∶水(摩尔比)=1∶4∶8;利用FTIR、XRD和SEM等方法对二氧化硅气凝胶改性特征和添加DCCA前后的物理性质进行表征。
|
| 关 键 词： | 二氧化硅气凝胶 正交试验 DCCA |
Determination of the Best Preparation Craft of Silica Aerogel |
| |
| LI Hua,HUO Li,ZHANG Fen-yun.Determination of the Best Preparation Craft of Silica Aerogel[J].GuangZhou Chemical Industry and Technology,2012,40(14):54-56. |
| |
| Authors: | LI Hua HUO Li ZHANG Fen-yun |
| |
| Affiliation: | LI Hua, HUO Li, ZHANG Fen -yun ( 1 School of Chemical Food, Zhongzhou University, Henan Zhenghzou 450044 ; 2 Technology Center, Zhangzhou Compamy, Aluminum Corporation of China, Henan Jiaozuo 454171, China) |
| |
| Abstract: | Using tetraethoxysilane（TEOS） as the silica source, silica aerogels were synthesized via sol -gel and am- bient drying process. In order to enhanced the wet gel, measures such as prolonging aging time, exchanging solvent and using an trimethylchlorosilane（TMCS）/hexane modification were adopted. The synthesized silica aerogel was a light, por- ous and crack -free solid. Through the orthogonal experiment, the determined preparation gelatin best technological con- ditions were pH =5, and TEOS ： EtOH ： H20（摩尔比） = 1 ： 4 ： 8. Using FTIR, XRD and SEM and other methods, the modification of silica aerogel properties and physical properties before and after adding DCCA were characterized. |
| |
| Keywords: | silica aerogels orthogonal test DCCA |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
