| 聚硅酸溶胶和凝胶的电镜观察 |
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| 引用本文： | 艾子萍 高宝玉. 聚硅酸溶胶和凝胶的电镜观察[J]. 环境化学, 1994, 13(2): 119-122 |
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| 作者姓名： | 艾子萍 高宝玉 |
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| 作者单位： | 山东大学实验中心!济南250100(艾子萍)，山东大学环境科学中心!济南250100(高宝玉，王淑仁) |
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| 摘 要： | 用透射电子显微镜（ＴＥＭ）和扫描电子显微镜（ＳＥＭ）观察了硅酸溶胶的聚合过程。在ｐＨ值与Ｎａ２Ｏ·ｎＳｉＯ２模数一定时，其聚合速度与温度有关，温度高聚合快。聚硅酸溶胶粒子主要是圆形或椭圆形颗粒，粒子由于聚集变大，硅酸凝胶具有毛刷结构，其间隙被水填充。反应时，聚集、聚合和溶解同时进行，最后聚集起主要作用，凝胶形成。
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| 关 键 词： | 聚硅酸 溶胶 凝胶 电镜观察 |
ELECTRON MICROSCOPIC OBSERVATION ON SOL AND GEL OF POLYSILICIC ACID |
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| Ai Zi ping. ELECTRON MICROSCOPIC OBSERVATION ON SOL AND GEL OF POLYSILICIC ACID[J]. Environmental Chemistry, 1994, 13(2): 119-122 |
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| Authors: | Ai Zi ping |
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| Abstract: | The process of polymerization of silicic acid was observed by transmission electron microscope (TEM) and scanning electron microscope (SEM). The experimental results show that polymerized rate is related to temperature in proper pH and the greater particle of polysilicic sol was aggregation of smaller particles. During reaction, aggregation, solubi-lization and polymerization are occurring simultaneously. Finally aggregation alone predominated until a gel is formed. A silicic acid gel consists of an interlaced fibrillar or brush heap,the spaces filled by liquid. |
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| Keywords: | polysilicic acid sol gel electron microscopic observation. |
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