Effect of Surfactants on the Morphology of Hydroxyapatite Fibers

doi:10.15541/jim20150487

Abstract

Abstract:

Hydroxyapatite fiber with high crystallinity was successfully fabricated by hydrothermal homogeneous precipitation synthesis with Ca(NO₃)₂·4H₂O and (NH₄)₂HPO₄ as precursors. Effects of the surfactants include cetyltrimethylammonium bromide (CTAB), sodium dodecyl sulfate (SDS) and polyethylene glycol (PEG), and different amounts of them on the morphology and phase composition of the obtained products were investigated. Results show that the products obtained by using the three surfactants are all hydroxyapatite with minor CaCO₃in some samples. The addition of both CTAB and SDS inhibits the growth of the fibers, leading to the coexistence of fibers and spherical aggregates. However, the addition of PEG can promote the growth of fibers to some extent.

Key words: hydroxyapatite fibers, surfactants, hydrothermal homogeneous precipitation, morphology

CLC Number:

TB321

QI Mei-Li, QI Jia, XIAO Gui-Yong, LV Yu-Peng. Effect of Surfactants on the Morphology of Hydroxyapatite Fibers[J]. Journal of Inorganic Materials, 2016, 31(7): 726-730.

Figures/Tables 4

Fig. 1 XRD patterns of the products synthesized without (a) and with the addition of different amounts of surfactants (b-d)

Fig. 2 SEM images of the products with addition of different amounts of CTAB (a) 0 mmol/L; (b) 1.84 mmol/L; (c) 3.9 mmol/L; (d) 9.2 mmol/L

Fig. 3 SEM images of the products with addition of different amounts of SDS (a) 0.435 mmol/L; (b) 0.87 mmol/L; (c) 4.35 mmol/L

Fig. 4 SEM images of the products with addition of different amounts of PEG (a) n(Ca2+):n(PO43-):n(PEG)=10.8:6:1; (b) n(Ca2+):n(PO43-):n(PEG)=10.8:6:2; (c) n(Ca2+):n(PO43-):n(PEG)=10.8:6:10

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