摘要
采用长链烷烃和微胶囊方法对纳米TiO2(锐钛型,粒径20nm)进行表面改性,利用傅里叶红外光谱(FTIR)和热重分析(TGA)分别研究了改性纳米粉体的表面化学结构及接枝率,结果表明:改性纳米TiO2粉体表面成功接枝了高分子聚合物,接枝率分别为5%和12%。将改性纳米TiO2粉体(质量分数为1%-3%)与双组分聚氨酯涂料进行复合,制备了纳米TiO2/聚氨酯复合涂料,并利用扫描电子显微镜(SEM)对纳米复合涂层进行了微观检测,结果表明:微胶囊改性的纳米TiO2在涂层中的分散性最好。
The surface of nano-TiO2 ( anatase, particle diameter 20nm) was modified by long-chain crocapsule, which was characterized by fourier trnsform infrared ray ( FTIR ) and thermal analysis ( TGA ) show that the modified nano-TiO2 particles have been grafted by macromolecular polymers, with the alkane or migrafting The results degrees of 5% and 12%, respectively. The modified nano-TiO2(1% -3% )was blended with polyurethane resins to obtain nano-TiO2/polyurethane composite coating, which were further studied by scanning electron microscopy(SEM). The results show that nano-TiO2 which was modified by microcapsule has the best dispersibility.
出处
《表面技术》
EI
CAS
CSCD
2007年第4期42-44,48,共4页
Surface Technology
关键词
纳米TIO2
表面改性
纳米复合涂层
分散性
聚氨酯涂层
Nano-TiO2
Surface modification
Nano-composite coatings
Distribution
Polyurethane coating