论文部分内容阅读
以 40 0目硅灰石粉配成质量分数为 10 %的悬浮液 ,加无机助剂和聚乙二醇作酸化处理 ,制得比表面积 10 0～ 6 0 0m2 /g、颗粒粒径 6～ 12 μm的多孔性SiO2 粉体。研究表明 ,当其他工艺条件和添加量相同时 ,使用平均相对分子质量为 6 0 0 0的同种聚乙二醇 ,在 10 0g质量分数为 10 %的硅灰石悬浮液中 ,其添加量为 9 4g的样品的比表面积和粒径都最大。初步研究表明 ,这是由于聚乙二醇的高分子网络凝聚和空间位阻效应所致
40 0 mesh wollastonite dubbed mass fraction of 10% of the suspension, plus inorganic additives and polyethylene glycol for acidification, the specific surface area of 10 ~ 600m2 / g, the particle size of 6 to 12 μm porous SiO 2 powder. The results show that, when the other conditions and the same amount of addition, the average molecular weight of the same relative molecular weight of 6,000 using polyethylene glycol, 10g mass fraction of 10% wollastonite suspension, the amount added The sample with 94g had the largest specific surface area and particle size. Preliminary studies have shown that this is due to the polymer network aggregation and steric hindrance effect of polyethylene glycol