The porous SiO2 xerogels with controlled texture were obtained from TEOS in the presence of AEO by sol-gel method.It was found that the addition amount and molecular weight of AEO and ageing time of SiO2-AEO sol could adjust the textural properties of SiO2 xerogels,and AEO in the xerogel had different thermal stability when the SiO2-AEO xerogel being heated under different atmospheres.As a result,It has been found that the SiO2 xerogel showed stronger flexible skeleton,narrower pore distribution,and higher thermal stability after heat-treatment.%采用溶胶-凝胶法，以正硅酸乙酯（TEOS）为前驱体，用脂肪醇聚氧乙烯醚（AEO）为改性剂制备结构可控的多孔SiO2干凝胶.结果表明：通过调节添加量和聚合度以及溶胶老化时间可以对SiO2干凝胶织构性质进行有效的调控；采用不同的环境气氛对SiO2-AEO干凝胶进行热处理，则AEO表现出不同的热稳定性；经热处理后，AEO等有机残留物被脱除的同时，SiO2-AEO干凝胶柔性骨架得到加强，孔分布更趋集中，干凝胶结构的热稳定性得到进一步提高.
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