The polyborosilazane aerogels were prepared by hydrosilylation reaction using polyborosi-lazane as raw material with divinylbenzeneas crosslinking agent ,and then dried by CO2 supercritical drying .Infrared spectroscopy ,scanning electron microscopy ,specific surface area and aperture analy-zer ,contact angle measurement were used to characterize the formation ,microstructure and hydropho-bic property of polyborosilazane aerogels .The results show that the polyborosilazane aerogels are pre-pared by hydrosilylation reaction using polyborosilazane with divinylbenzene ;the specific surface areas of the resultant aerogels with three-dimensional network structure are in the range of 307-458cm2/g , which is a mesoporous material with superhydrophobic property .The pore volume is in the range of 1 .20-2 .17cm3/g and pore size is in the range of 2 .0-100nm ,and when the volume fraction of the start-ing solvent is 85％ ,the hydrophobic performance of polyborosilazane aerogels is the best ,the water contact angle is 151 .5°.%以聚硼硅氮烷为原料,二乙烯苯为交联剂,通过硅氢加成反应结合超临界干燥工艺制备聚硼硅氮烷气凝胶.利用红外光谱、扫描电镜、比表面积与孔径分析仪对所制备气凝胶的形成及微观结构进行了分析,并通过接触角仪对样品的疏水性能进行了研究.结果表明:聚硼硅氮烷和二乙烯苯通过硅氢加成反应制得聚硼硅氮烷气凝胶;所制备的气凝胶的比表面积为307～458cm2/g,孔体积为1.20～2.17cm3/g,孔径分布为2.0～100nm,是一种具有三维网状结构的介孔材料,并具有超疏水性能,且当起始溶剂体积分数为85％ 时,气凝胶疏水性能最佳,接触角为151.5°.
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