TY - JOUR
T1 - Grafting of Poly(ethylene glycol)s onto nanometer silica surface by a one-step procedure
AU - Guo, Zhao Xia
AU - Liu, Wen Fang
AU - Li, Ying
AU - Yu, Jian
PY - 2005/2
Y1 - 2005/2
N2 - Poly(ethylene glycol)s (PEGs) have been grafted onto nanometer silica surface in toluene at 80°C 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, 13CPMAS NMR spectroscopy, thermogravimetric 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.
AB - Poly(ethylene glycol)s (PEGs) have been grafted onto nanometer silica surface in toluene at 80°C 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, 13CPMAS NMR spectroscopy, thermogravimetric 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.
KW - Diisocyanate
KW - Grafting
KW - Poly(ethylene glycol)
KW - Silica
KW - Surface modification
UR - http://www.scopus.com/inward/record.url?scp=14544300652&partnerID=8YFLogxK
U2 - 10.1081/MA-200046982
DO - 10.1081/MA-200046982
M3 - Article
AN - SCOPUS:14544300652
SN - 1060-1325
VL - 42 A
SP - 221
EP - 230
JO - Journal of Macromolecular Science - Pure and Applied Chemistry
JF - Journal of Macromolecular Science - Pure and Applied Chemistry
IS - 2
ER -