纳米TiO_2表面聚对苯二甲酸乙二醇酯预聚物的改性及表征  

Grafting of prePET onto Nano-TiO_2 Surface and Characterization

作　　者：张雨[1] 施利毅[1] 杭建忠[1] 曹绍梅[1] 王源[1] 

机构地区：[1]上海大学纳米中心

出　　处：《化学反应工程与工艺》2007年第5期430-434,共5页Chemical Reaction Engineering and Technology

基　　金：上海市科委创新团队(06DZ05902)

摘　　要：利用缩聚聚合,在纳米TiO_2颗粒表面接枝聚对苯二甲酸乙二醇酯的预聚物(prePET)。通过红外(FT-IR),热失重(TGA)和X射线电子能谱(XPS)分析表明prePET成功接枝在纳米TiO_2的表面。透射电子显微镜(TEM)观察表明prePET-TiO_2纳米复合粒子粒径大约在30nm,分散性好。原子力显微镜(AFM)观察表明prePET-TiO_2纳米复合粒子在1,1,2,2-四氯乙烷中均匀分散,无团聚。同时发现反应真空度影响了TiO_2表面的接枝率,真空度小,接枝率大。扫描电子显微镜(SEM)观察表明prePET- TiO_2纳米复合粒子能够在聚碳酸酯(PC)基体中具有良好的分散性,复合粒子填充量的上升增强了prePET-TiO_2/PC复合材料的拉伸强度。The TiO2 nanoparticles were modified with the prepolymer of poly （ethylene terephalate） via polycondensation. The results of Infrared Spectrum （IR）, Themogravimetric Analysis （TGA） and X-ray Photoelectron Spectroscopy （XPS） showed that pre-poly （ethylene terephalate） （prePET） was successfully grafted onto the surface of the TiO2 particles. Transmission Electron Microscope （TEM） images demonstrated that the prePET-TiO2 particles had a better dispersion, average diameter was about 30 nm. Atomic Force Microscope （AFM） image demonstrated the prePET-TiO2 particles was dispersed homogenously and there was no agglomeration in the medium of tetracoloroethane. Vacuum determined grafting efficiency. The lower the vacuum, the higher efficiency of grafting. Scanning Electron Microscope （SEM） images demonstrated a better dispersion of the composite particles in the polycarbonate （PC） matrix in nano-scale. Tensile strength of prePET-TiO2/PC composite material increased with more prePET-TiO2 nanoparticles filling content in PC matrix.

关 键 词：纳米二氧化钛 聚对苯二甲酸乙二醇酯 表面接枝 复合粒子 

分 类 号：TQ325[化学工程—合成树脂塑料工业]