添加少量聚乙二醇(PEG,polyethyleneglycol)于TEOS-Water-Ethanol-Catalyst溶胶体系中,以改善SiO2溶胶的颗粒度和孔结构(比表面积,孔容积,孔径),通过比较sol中随时间变化的颗粒长大情况,探讨了PEG在sol-gel中的作用过程,并提出了PEG在sol中的作用模型
PEG was added into TEOS-Water-Ethanol-catalyst system. The effects of the PEG on SBET, particle radius distribution and pore structure in silica sol and gel were studied. From the changes of the particle sizes in' the sol, the model of the PEG behaviour i
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