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Preparation of poly(ethylene glycol)-grafted silica nanoparticles using a facile esterification condensation method

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Abstract

Organic–inorganic hybrid nanoparticles have been prepared by the direct facile esterification condensation under extremely mild conditions as ambient temperature, moisture and atmospheric pressure, and the resulting composite particles are characterized by ESCA, FTIR, TEM, DLS, TGA, DSC, and XRD techniques. Results show that this facile graft method has high graft efficiency and the grafted poly(ethylene glycol) (PEG) accounts for about 55 wt% of the total silica composites. The resulting silica nanoparticles have core-shell structure with PEG on the outside and SiO2 in the core. As a result, the dispersion behavior of nanoparticles and the thermal stability of the grafted PEG are improved by the formation of covalent ester bonds between PEG and the reactive silica nanoparticles. The PEG phase, however, is disturbed by the proximity of the oxide phase of SiO2. Consequently, less crystal or faulty crystal of PEG is resulted when PEG is grafted onto the surfaces of silica nanoparticles.

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Acknowledgment

This work is supported by ‘Qing Lan’ Talent Engineering Funds by Lanzhou Jiaotong University, contract grant number: QL-08-03A.

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Authors and Affiliations

  1. School of Mechatronic Engineering, Lanzhou Jiaotong University, 730070, Lanzhou, China

    Libang Feng, Yulong Wang & Na Wang

  2. Key Laboratory of Non-Ferrous Metal Alloys of Ministry of Education, Lanzhou University of Technology, 730050, Lanzhou, China

    Yingxia Ma

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  1. Libang Feng
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  2. Yulong Wang
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Correspondence to Libang Feng.

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Feng, L., Wang, Y., Wang, N. et al. Preparation of poly(ethylene glycol)-grafted silica nanoparticles using a facile esterification condensation method. Polym. Bull. 63, 313–327 (2009). https://doi.org/10.1007/s00289-009-0089-0

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  • DOI: https://doi.org/10.1007/s00289-009-0089-0

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