改良单质硅溶解法制备大粒径硅溶胶的研究张元静.pdf

27 3 河 北 工 业 科 技 Vol. 27, No . 3 2010 5 H ebei Journal of Industrial Science and T echnolog Ma 20 10 : 1008- 1534( 2010) 03-0185- 04 , , , , ( 青岛科技大学化工学院, 山东青岛 266042) : 在 一定的温度和压力条件下, 采用单质硅 解法, 用正交试验法研究了反应温度反应压 力反应时间氢氧化钠及硅粉用量等对硅 胶收率及粒径的影响实验结果表明, 硅 胶制备实 验的最佳工艺条件如下: 压力为0. 5 MPa, 在 200 mL 去离子水中加入 15 g 硅粉和0. 4 g 氢氧化 钠, 并控温度为160 e 反应9 h, 在此条件下制得的硅 胶平均粒径为 174. 4 nm, 收率为80. 15% 平行实验结果表明, 该最佳工艺条件具有良好的重现性 : 压力; 单质硅; 硅 胶; 正交试验 : T Q330 : A Stud on preparation of large partical size silica sol b modified silica dissolution method ZHANG Yuan-jing, LI Zhen-qiu, LI Jing-hua, HUAN G Cai-xia, YU Guang ( Department of Chemistr Engineering , Qingdao Universit of Science and T echnolog , Qingdao Shandong 266042, China) Abstract: The silica sol was s nthesized under the condit ion of certain temperature and pressure, with silica as reactions and sodium h drox ide as catal st. T he factors that affect silica sol, such as the reaction temperature and pressure, reaction time, amount of catal st and silicon, w ere studied b orthogonal experiment in this paper. The results show t hat the optimum condi- t ions are as follow s: silicon powder 15 g, sodium h drox ide 0. 4 g in 200 mL deionized w ater. T he reaction w as carried out for 9 h at 160 e , 0. 5 MPa. The parallel experiment results show that these optimum conditions could be re-pla ed. Key words: pressure; silicon; silica sol; orthogonal experiment ( silica sol) : , [ 5] 100~ 130 nm ; , , ,