Grafting of poly(ethylene glycol)s onto nanometer silica surface by a one-step procedure

被引：10
|
作者：
Guo, ZX [1 ]
Liu, WF [1 ]
Li, Y [1 ]
Yu, J [1 ]
机构：
[1] Tsinghua Univ, Sch Mat Sci & Engn, Inst Polymer Sci & Engn, Dept Chem Engn, Beijing 100084, Peoples R China
来源：
JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY | 2005年 / A42卷 / 02期
关键词：
silica; poly(ethylene glycol); surface modification; grafting; diisocyanate;
D O I：
10.1081/MA-200046982
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Poly(ethylene glycol)s (PEGs) have been grafted onto nanometer silica surface in toluene at 80degreesC using toluene diisocyanate (TDI) as a coupling agent. This was done using a one-step procedure involving a first reaction of TDI with silica and a subsequent reaction of isocyanate-bound silica with PEG. The PEG grafted silicas have been characterized by FTIR spectroscopy, C-13 CPMAS AIMR spectroscopy, thermo-gravimetric analysis TGA), and elemental analyses. The maximum PEG grafting is 16%, and the maximum overall grafting is 36%, as determined by TGA. The effects of the amount of PEG, temperature, catalyst, and molecular weight of PEG have been studied.
引用
收藏
页码：221 / 230
页数：10
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