| 非水解溶胶-凝胶反应制备功能化纳米二氧化硅 |
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| 引用本文： | 辛昭,许涌深,章华桂.非水解溶胶-凝胶反应制备功能化纳米二氧化硅[J].工业催化,2011,19(1):35-39. |
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| 作者姓名： | 辛昭 许涌深 章华桂 |
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| 作者单位： | 1.天津大学化工学院，天津 300072；2.西北化工研究院，陕西 西安 710600 |
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| 摘 要： | 以正硅酸乙酯和甲酸为原料,硅烷偶联剂KH-570为改性剂制备了功能化纳米二氧化硅溶胶,通过紫外-可见分光光度计表征反应体系溶胶-凝胶反应的程度,研究了甲酸浓度、反应温度、微量水、醇类共溶剂以及硅烷偶联剂KH-570用量等对溶胶-凝胶反应的影响,并利用红外光谱对反应产物进行了表征.结果表明,增大甲酸浓度、加入微量水,提高...
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| 关 键 词： | 催化化学 正硅酸乙酯 甲酸 功能化纳米二氧化硅 溶胶-凝胶 |
Preparation of functional nano-silica by non-hydrolytic sol-gel process |
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| XIN Zhao,XU Yongshen,ZHANG Huagui.Preparation of functional nano-silica by non-hydrolytic sol-gel process[J].Industrial Catalysis,2011,19(1):35-39. |
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| Authors: | XIN Zhao XU Yongshen ZHANG Huagui |
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| Affiliation: | 1.School of Chemical Engineering,Tianjin University, Tianjin 300072, China;2.Northwest Research Institute of Chemical Industry, Xi¡¯an 710600, Shaanxi, China |
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| Abstract: | Functional nano-silica sol was prepared using tetraethyl orthosilicate （TEOS） and formic acid as raw materials and silane coupling agent KH-570 as the modifier. The reaction extent was studied by UV-Visible spectrophotometer（UV）. The influence of formic acid concentration ,reaction temperature ,and the dosage of water,alcohol co-solvent and silane coupling agent KH-570 was investigated. The products were characterized by IR. The results showed that sol-gel reaction rate was enhanced with the increase of formic acid concentration and reaction temperature, and the addition of the water, and the gelation time was shortened; alcohol co-solvent and silane coupling agent KH-570 exhibited stabilization for sol-gel reaction system and prolonged the gelation time. IR results indicated that some composite materials could be prepared by introducing carbonyl to the product. |
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| Keywords: | catalytic chemistry tetraethyl orthosilicate formic acid functional nano-silica sol-gel |
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