Journal
APPLIED SURFACE SCIENCE
Volume 257, Issue 14, Pages 6233-6238Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2011.02.045
Keywords
ATRP; Nanocomposites; Hydroxyapatite; Poly(methyl methacrylate)
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Funding
- Fundamental Research Funds for the Central Universities [WD0913008]
- Shanghai Municipal Education Commission, Changjiang Scholars and Innovative Research Team in University [IRT0825]
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This article describes the fabrication of hydroxyapatite (HAP) nanocomposites grafted with poly(methyl methacrylate) (PMMA). Surface-initiated atom transfer radical polymerization (ATRP) of methyl methacrylate (MMA) was carried out from hydroxyapatite particles derivatized with ATRP initiators. The structure and properties of the nanocomposites were investigated by thermogravimetric analysis (TGA), transmission electron microscopy (TEM), differential scanning calorimeter (DSC) measurements, and contact angle analyses. TGA was used to estimate the grafting density of ATRP initiators (0.49 initiator/nm(2)) and the amount of grafted PMMA on the HAP surface. The contact angle analyses indicated that grafting PMMA onto the HAP surface dramatically increased the hydrophobicity of the surface. Moreover, the HAP nanocomposites showed excellent dispersibility in both aqueous solution and organic solvent. (C) 2011 Elsevier B. V. All rights reserved.
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