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水玻璃的贮存和组分的变化 总被引:3,自引:0,他引:3
本文采用三甲基硅烷化-气相色谱法(简称TMS-GC法),利用有机单活性基团((CH_3)_3Si-)与水玻璃中硅酸离子活性端基(≡Si-OH或≡Si-O~-)反应,使之变成惰性端基(≡Si-O-Si(CH_3)_3)以防止硅酸的聚合,从而测得了水玻璃中硅酸物种的真实分布.实验结果表明:水玻璃是单硅、二硅、三硅等硅酸的混合物,在放置过程中,其组分发生改变,单硅的含量降低,聚硅的含量升降不一,其变化情况与水玻璃的模数(SiO_2/Na_2O的摩尔数之比)以及浓度(以SiO_2%计)等因素密切相关. 相似文献
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In this paper, benzene adsorption isotherm and their hysteresis on two important local diatomites were determined at 25℃, and their silicon hydroxyl group (SiOH) number was determined, their properties were reported, and the relationship between surface structure, surface SiOH number per nm2 and adsorption isotherm with hysteresis was discussed. The specific surface was also calculated from the isotherms, and pore-size distribution was determined. 相似文献
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