| 29SiNMR谱研究硅溶胶、水玻璃和硅酸乙酯水解液的分散状态 |
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| 引用本文： | 王金晞,柳海澄,陈荣三,陈冰,李海志.29SiNMR谱研究硅溶胶、水玻璃和硅酸乙酯水解液的分散状态[J].高等学校化学学报,1987,8(11):959. |
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| 作者姓名： | 王金晞 柳海澄 陈荣三 陈冰 李海志 |
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| 作者单位： | 1. 南京大学配位化学研究所;
2. 北京航空学院铸造教研室 |
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| 摘 要： | 硅溶胶、水玻璃和硅酸乙酯水解溶液的29SiNMR谱表明:1.凡硅溶胶都属于典型的胶体溶液。2、水玻璃溶液在SiO2/Na2O摩尔比≤2时,基本上属于可溶性二氧化硅体系,若>2,则随摩尔比增加,胶体成分增加。3、硅酸乙酯水解液在水解时,若H2O/C2H5O-摩尔比<0.5,其组成为多硅酸乙酯溶液;若≥0.5,为小粒子胶体和多环硅酸溶液。
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| 收稿时间： | 1986-06-14 |
Studies on the Dispersion State of Silica Hydrosol,Water Glass and Ethyl Silicate Hydrolysate by 29SiNMR Spectrography |
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| Wang Jinxi,Liu Haicheng,Chen Rongsan,Chen Bing,Li Haizhi.Studies on the Dispersion State of Silica Hydrosol,Water Glass and Ethyl Silicate Hydrolysate by 29SiNMR Spectrography[J].Chemical Research In Chinese Universities,1987,8(11):959. |
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| Authors: | Wang Jinxi Liu Haicheng Chen Rongsan Chen Bing Li Haizhi |
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| Institution: | 1. Coordination Chemistry Institute, Nanjing University, Sanjing;
2. Beijing Institute of Aeronautics and Astronautics, Beijing |
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| Abstract: | The dispersion state of silica hydrosol, water glass and ethyl silicate hydroly-sate is studied by 29SiNMR spectrography. The results indicate that all silica hydrosols are typical colloidal solution. The state of silica in water glass is more complicated. It is in true solution when the mole ratio of SiO,/Na,O is equal to or less than 2, but colloidal behaviour becomes gradually apparent when the mole ratio is more than 2.The state of silica in the hydrolysate is dependant on the mole ratio of H2O/C2H5O; when the ratio is less than 0.5, the product is poly-exthoxysilicate in the solution and when the ratio is equal to or more than 0.5, the product consists of small particulate colloids and polycyclic silicic acids in the solution. |
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