| 并加法制备超细二氧化硅 |
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| 引用本文： | 李志林,张少卿,石俊青. 并加法制备超细二氧化硅[J]. 无机盐工业, 2014, 46(7): 30 |
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| 作者姓名： | 李志林 张少卿 石俊青 |
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| 作者单位： | 河北大学化学与环境科学学院，河北保定 071002 |
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| 摘 要： | 以Na2O·3.27SiO2和硫酸为原料，采用并加法制备形状较好、粒度分布均匀、孔径在2~20 nm的超细二氧化硅。用吸油值、BET、SEM、FT-IR、XRD等方法对其进行表征，并考察了原料加入速度、表面活性剂、洗涤剂等对制备二氧化硅粉体的影响。结果表明，最佳反应条件为：Na2O·3.27SiO2加入速度为70 r/min，无表面活性剂加入，使用乙醇洗涤，85 ℃干燥2 h后100 ℃干燥2 h。在最佳反应条件下制得的二氧化硅粉体颗粒大部分呈圆形或椭圆形，形状较好，粒度分布比较均匀，比表面积为222.7 m2/g，平均孔径为16.95 nm。
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| 关 键 词： | 二氧化硅 并加法 表面活性剂 洗涤剂 |
Preparation of superfine silica by parallel feed-in method |
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| LI Zhi-Lin,ZHANG Shao-Qing,SHI Jun-Qing. Preparation of superfine silica by parallel feed-in method[J]. Inorganic Chemicals Industry, 2014, 46(7): 30 |
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| Authors: | LI Zhi-Lin ZHANG Shao-Qing SHI Jun-Qing |
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| Affiliation: | College of Chemistry & Environmental Science，Hebei University，Baoding 071002，China |
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| Abstract: | The highly dispersed superfine silica powder with good shape，uniform particle size distribution，and pore size of 2~20 nm was prepared by parallel feed-in chemical method with sodium silicate（Na2O·3.27SiO2） and sulfuric acid as rawmaterials.The basic performance of SiO2 powder had been characterized by means of oil absorption value，BET，SEM，FT-IR， and XRD.The effects of several technical factors，such as the adding speed，surfactants，and detergents，on the silica powder were studied.The results showed that the optimum reaction conditions were as follows：adding speed of Na2O·3.27SiO2 was70 r/min，no surfactant was added，ethanol was used as the detergent，drying at 85 ℃ for 2 h，and then went on drying at100 ℃ for 2 h.Under those conditions silica particles were round or oval，in good shape and uniformly distributed.The surface area was 222.7 m2/g and the average pore size was 16.95 nm. |
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| Keywords: | silica parallel feed-in method surfactant detergent |
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