二氧化钛的无机改性  

Inorganic Modification of Titanium Dioxide

作　　者：苏彦方[1] 黎振球[1] 

机构地区：[1]青岛科技大学化工学院,山东青岛266042

出　　处：《造纸科学与技术》2012年第3期37-40,共4页Paper Science & Technology

摘　　要：在一定的温度和压力条件下,采用单质硅溶解法制备用于改性的大粒径硅溶胶,利用表面包覆技术,在TiO2的表面形成致密的SiO2膜,以达到改性的目的。实验得出:在反应温度160℃,反应压力0.5 MPa,反应时间9h,硅粉用量15 g,催化剂用量0.4g的条件下制得分散良好的硅溶胶;通过硅酸钠对pH值的调节来对TiO2浆液进行预分散,并用自制硅溶胶对TiO2浆液进行无机改性,当SiO2/TiO2=3.5%,pH=8时,改性后TiO2浆液分散稳定性有极大改善。At a certain temperature and pressure conditions, the elemental silicon dissolved method was used for large particle size silica sol modification . Using the surface coated technology, a densed SiO2 film was formed on the surtace of TiO2. The results show that the surface condition of TiO2 coated with SiO2 film changed. The dispersion performance of TiO2 in aqueous solution improved. By FTIR analysis, it can be found that this is not only a physical coating but also a kind of chemically bonding, forming Ti-O-Si bonds on the surface of TiO2. The slurry stability improved greatly after coating with silica sol.

关 键 词：二氧化钛 大粒径硅溶胶 改性 

分 类 号：TS727.6[轻工技术与工程—制浆造纸工程]