摘要
提出了一种对纳米SiO2表面进行化学改性的新方法。即在催化剂的存在下,以纳米SiO2为反应中心核,纳米SiO2表面上的活性羟基与AB2型单体发生一步缩聚反应,在纳米SiO2表面接枝超支化聚合物。FT-IR和TEM的表征证明纳米SiO2表面接枝上了超支化聚合物。研究表明,得到的超支化聚合物接枝改性纳米SiO2的表面性质有较大的改变,在乙醇、氯仿等溶剂中有很好的分散性和稳定性。
A new method to chemical modified the surface of nanosized-SiO_2 was studied in this paper. Nanosized-SiO_2 was grafted with hyperbranched poly(amin ester) through one-spot polycondensation between AB_2 monomer and active hydroxyl on silica surface in present of catalyst. Compared with the results of FT-IR and TEM, it is found hyperbranched poly(amin ester) is successfully grafted on the surface of nanosized-SiO_2 and the surface properties have been changed with an expected way. The results indicate that nanosized-SiO_2 grafted with hyperbranched poly(amin ester) has better dispersion in the ethanol or chloroform than that unmodified.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2005年第3期188-191,共4页
Polymer Materials Science & Engineering
关键词
超支化聚胺酯
纳米SIO2
表面改性
分散稳定性
hyperbranched poly(amin-ester)
nanosized-SiO_2
surface modification
dispersion stability
