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首页> 外文会议>International Conference on Condensed Matter and Applied Physics >Synthesis and Characterization of Nanoporous Silica Aerogel Beads Using Cheap Industrial Grade Sodium Silacte Precursor
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Synthesis and Characterization of Nanoporous Silica Aerogel Beads Using Cheap Industrial Grade Sodium Silacte Precursor

机译：廉价工业级硅胶前体的纳米孔石英珠的合成与表征

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We report a method to synthesize low-density transparent mesoporous silica aerogel beads by ambient pressure drying (APD). The beads were prepared by acid-base sol-gel polymerization of sodium silicate in via the ball dropping method (BDM). To minimize shrinkage during drying, wet silica beads were initially prepared; their surfaces were then modified using trimethylchlorosilane (TMCS) via simultaneous solvent exchange and surface modification. The specific surface area and cumulative pore volume of the silica aerogel beads increased with an increase in the %V of TMCS. Silica aerogel beads with low packing bed density, high surface area, and large cumulative pore volume was obtained when TMCS was used. Properties of the final product were examined by BET, and TG-DT analyses. The hydrophobic silica aerogel beads were thermally stable up to 350°C.We discuss our results and compare our findings for modified versus unmodified silica beads.
机译：我们通过环境压力干燥（APD）来报告一种合成低密度透明介孔二氧化硅气凝胶珠的方法。通过通过球滴法（BDM）通过硅酸钠酸碱溶胶 - 凝胶聚合制备珠粒。为了最小化干燥过程中的收缩，最初制备湿二氧化硅珠粒;然后通过同时溶剂交换和表面改性使用三甲基氯硅烷（TMC）来修饰它们的表面。二氧化硅气凝胶珠粒的比表面积和累积孔体积随着TMC的％v的增加而增加。当使用TMC时，获得了具有低填充床密度，高表面积和大累积孔体积的二氧化硅气凝胶珠。通过BET和TG-DT分析检查最终产品的性质。疏水性二氧化硅气凝胶珠粒可热稳定于350°C。我们讨论了我们的结果，并比较了我们的改性结果与未改性的二氧化硅珠。

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