Study on the Preparation and External Adsorption of Monodisperse Nano Silicon Dioxide
In the study, the ethyl silicate was used as raw materials and preparing nano silicon dioxide was carried out by sol–gel method. The influences of some determinant parameters such as the dosages of the ethanol, the water and the ammonia on the efficiency of the reaction and on the size of micro particles were investigated in details. In addition, the temperature was considered as one of the crucial factors. Based on the optimal variables, nano silicon dioxide was synthesized and the external property was modified by adding a kind of silane coupling agents. Moreover, the adsorption amount of different kinds of nano silica particles was tested. It has been shown that it would be possible to synthesize nano silicon dioxide at 45 °C for 2 h, and the optimal mole ratios of the variables were confirmed by orthogonal test. The adsorptions of nonionic surfactant (OP) and reactive anionic surfactant (DNS) ended in 40 min, although the adsorbed dose was different.
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Document Type: Research Article
Publication date: September 1, 2012
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