纳米TiO_2和微米SiO_2改性及分散性能的研究  

Modification and dispersion behavior of nano-TiO_2 and micro-SiO_2

作　　者：慕科仪[1] 赵国樑[1] 周伟[1] 

机构地区：[1]北京服装学院材料科学与工程学院,北京100029

出　　处：《合成纤维工业》2011年第1期5-8,共4页China Synthetic Fiber Industry

基　　金：北京市属高等学校人才强教计划资助项目(PHR200907115)

摘　　要：采用不同的分散工艺和改性剂对纳米TiO_2和微米SiO_2粉体进行处理,使用激光粒度仪、红外光谱(IR)、热失重(TG)等手段对粉体粒径、粉体表面结构进行表征,探讨了超微粉体在乙二醇(EG)中分散的最佳工艺。结果表明:钛酸酯偶联剂(NDZ-201)可在纳米TiO_2表面接枝,接枝率约为6%;硅烷偶联剂(KH570)可在微米SiO_2表面接枝,接枝率约为9%。纳米TiO_2表面改性的最佳工艺为:锆珠直径1 mm,NDZ-201添加质量分数4%,研磨时间30 min;微米SiO_2表面处理最佳工艺为:钢珠直径6 mm,KH570添加质量分数为2%,研磨时间30 min。The modification of nano-TiO2 and micro-SiO2 was conducted using different dispersion processes in presence of different modifiem. The particle size and surface structure of nano-TiO2 and micro-SiO2 powders were characterized by laser granu- lometer, infrared spectrometry （ IR ）, thermogravimetry （TG）. The optimal dispersion process of ultramicro particle was dis- cussed in ethylene glycol. The results showed that titanate coupling agent （ NDZ-201 ） can be grafted on the surface of nano-TiO2 with the graft ratio about 6% when silane coupling agent （KH570） can be grafted on the surface of micro-SiO2 with the graft ratio about 9%. The surface modification process were optimized as followed： zirconium bead diameter 1 mm, 4% NDZ-201 by mass fraction, grinding time 30 min for nano-TiO2 ; and steel bead diameter 6 mm, 2% KH570 by mass fraction and grinding time 30 min for micro-SiO2.

关 键 词：纳米二氧化钛 微米二氧化硅 偶联剂 改性 分散 乙二醇 

分 类 号：TB383.1[一般工业技术—材料科学与工程]