塑料改性用金红石型TiO_2的一步法合成及表征  

One-Step Synthesis and Characterization of Titanium Dioxide Powder for Plastic Modification

作　　者：张国永[1] 周箭[1] 申乾宏[1] 杨辉[1] 

机构地区：[1]浙江大学材料科学与工程系,杭州310027

出　　处：《硅酸盐学报》2011年第3期391-396,共6页Journal of The Chinese Ceramic Society

基　　金：国家科技支撑计划(2006BAJ05B05)资助项目

摘　　要：以钛酸四正丁酯、硝酸、乙烯基三乙氧基硅烷为原料,利用沉淀法在低温条件下一步合成出塑料改性用金红石型二氧化钛粉体。通过X射线衍射、Fourier变换红外光谱、X射线光电子能谱、透射电镜等手段对改性粒子的微观结构进行了表征。结果表明:改性剂硅烷与单颗粒TiO2粒子表面以Ti—O—Si键化学键合,改性后的TiO2与水的接触角达144°,能稳定分散于二甲苯中,可与高密度聚乙烯均匀混炼。A surface-modified titanium dioxide powder used for plastic modification was synthesized by one-step precipitating method at a low temperature using tetrabutyl titanate,nitric acid and vinyltriethoxysilane as raw materials.Microstructure of the composites were characterized by X-ray diffraction,Fourier transform infrared spectroscopy,X-ray photoelectron spectroscopy and transmission electron microscope.The results indicate that the silane is grafted to the surface of single TiO2 particle by Ti-O-Si bond.The contact angle of the modified TiO2 with water is 144°,and the TiO2 particles can stably distribute in xylene and homoge-neously mix with the high density polyethylene.

关 键 词：金红石 二氧化钛 低温 硅烷 表面改性 疏水 分散性 

分 类 号：O65[理学—分析化学] TQ31[理学—化学]