单分散纳米SiO_2微球表面化学修饰及STF效应研究进展

Progress of surface chemical modification and STF effect of the monodispersed nano-SiO_2 microspheres

溶胶-凝胶法制备纳米SiO2的分散性好、粒径可控,但由于纳米颗粒的比表面积大,容易团聚。因此可以通过化学方法对其进行表面化学修饰以改善其分散性,提高应用领域。本文主要介绍了溶胶-凝胶法制备单分散纳米SiO2微球,表面化学修饰的化学方法及剪切增稠(STF)效应研究进展。

The preparation of monodispersed nano-SiO2 by sol-gel method used widely in resent years,because of its merits,such as particle size controlled easily,dispersed well in solutions and so on.As its large surface area,nano-SiO2 may reunite.So we can use surface chemical modification method to improve dispersions and applications of nano-silica.Moreover,the preparation of nano-sized SiO2 micropheres using sol-gel method,the surface chemical modification and shear-thickening（STF） effects were reviewed detail.