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By adopting sodium silicate as a major material,SiO_2 nanoparticles (size in 8-15nm) water-dispersiod was prepared by ion exchanging.The effects of sodium silicate concentration,surface-modifying time,temperature and technological conditions on their diameter,size distribution and dispersion stability were also studied.The result show that,the hydrophilic lipophlic and hydrophilic-lipophilic SiO_(2) nanoparticles water-dispersoid can be prepared through different kinds of surface-modifiers and the optimum reaction conditions have been determined as follows:sodium silicate solution concentration:8w%;silicone dosage:3% of the total mass of nano SiO_(2) water-dispersoid;adding way and time of surface-modifier:continual dropping for 2h;surface-modifying temperature:60-70℃.
By adoption sodium silicate as a major material, SiO 2 nanoparticles (size in 8-15 nm) water-dispersiod was prepared by ion exchanging.The effects of sodium silicate concentration, surface-modifying time, temperature and technological conditions on their diameter, size distribution and The stability of the resulting show that, the hydrophilic lipophilic and hydrophilic-lipophilic SiO 2 (2) nanoparticles water-dispersoid can prepared through different kinds of surface-modifiers and the optimum reaction conditions have been determined as follows: sodium silicate solution concentration: 8w%; silicone dosage: 3% of the total mass of nano SiO 2 (2) water-dispersoid; adding way and time of surface-modifier: continually dropping for 2h; surface-modifying temperature: 60-70 ° C.