Preparation of Alginate/Silica Composite Beads with In Vitro Apatite-Forming Ability
Alginate/silica composite beads of mm-size for biomedical applications were prepared from water glass and sodium alginate via a simple sol-gel route. They kept their original shapes when soaked in the phosphate solution of lower pH. In this case, faint calcium phosphate peaks were observed in X-ray diffraction. Peaks corresponding to phosphate group were also found in FT-IR. Apatite was obtained on the surface of beads made with calcium chloride after soaking in phosphate solution while monetite was formed on the surface of beads made with calcium nitrate.
Zhong Cao, Yinghe He, Lixian Sun and Xueqiang Cao
F. Xiao et al., "Preparation of Alginate/Silica Composite Beads with In Vitro Apatite-Forming Ability", Advanced Materials Research, Vols. 236-238, pp. 1889-1892, 2011