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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
A small amount of polyethylene glycol (PEG) was added to the TEOS-Water-Ethanol-Catalyst sol system to improve the particle size and pore structure (specific surface area, pore volume and pore size) of the silica sol. The particle growth process was discussed. The effect of PEG on the sol-gel was also discussed. The model of PEG in sol