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首页> 外文期刊>Advanced Powder Technology: The internation Journal of the Society of Powder Technology, Japan >Surface properties of nanosize hollow silica particles on the molecular level
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Surface properties of nanosize hollow silica particles on the molecular level

机译：纳米级中空二氧化硅颗粒在分子水平上的表面性质

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摘要

Hollow particles are a newly developing material with the special properties of low density,thermal insulation and distinct optical activity.A number of preparation methods have been proposed in the literature.The polymer bead template method is one of the common processes to synthesize hollow particles,which can easily control particle size.However,byproducts produced during preparation adversely affect the natural environment.We have proposed an inorganic template method which overcomes the above disadvantages and also has some strong points.Although particle surface structure strongly affects wettability and particle dispersability,there are few reports that have discussed hollow particle structure.In this study,the shell wall structure of hollow particles was determined in detail by an analysis adsorption mechanism using the nitrogen adsorption isotherm.The results were compared with those of dense particles.The characteristics of the surface hydroxyl groups which react with surface modification reagents were then evaluated by water vapor adsorption.The modified surface was also characterized by Fourier-transform infrared spectroscopy and thermogravimetry/differential thermal analysis.
机译：空心颗粒是一种新兴的材料，具有低密度，隔热和独特的光学活性等特殊性能。文献中提出了许多制备方法。聚合物珠模板法是合成空心颗粒的常用方法之一，然而，在制备过程中产生的副产物会对自然环境造成不利影响。我们提出了一种无机模板法，该方法克服了上述缺点并具有一定的优势。尽管颗粒表面结构强烈影响润湿性和颗粒分散性，但是很少有报道讨论中空粒子的结构。在这项研究中，通过使用氮吸附等温线的分析吸附机理详细确定了中空粒子的壳壁结构，并将结果与​​致密粒子的特征进行了比较。与表面反应的表面羟基然后通过水蒸气吸附来评估改性试剂。改性表面还通过傅里叶变换红外光谱和热重分析/差热分析进行表征。

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