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

Zhao Xia Guo; Wen Fang Liu; Ying Li; Jian Yu

doi:10.1081/MA-200046982

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

Zhao Xia Guo^*, Wen Fang Liu, Ying Li, Jian Yu

^*Corresponding author for this work

Tsinghua University

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	221-230
Number of pages	10
Journal	Journal of Macromolecular Science - Pure and Applied Chemistry
Volume	42 A
Issue number	2
DOIs	https://doi.org/10.1081/MA-200046982
Publication status	Published - Feb 2005
Externally published	Yes

Keywords

Diisocyanate
Grafting
Poly(ethylene glycol)
Silica
Surface modification

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10.1081/MA-200046982

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abstract = "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.",

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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

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DO - 10.1081/MA-200046982

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VL - 42 A

SP - 221

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JO - Journal of Macromolecular Science - Pure and Applied Chemistry

JF - Journal of Macromolecular Science - Pure and Applied Chemistry

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ER -

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

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Keywords

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