A novel starch-based hybrid hydrogel was formed by physical and mild steps. Firstly, aqueous solution of a mixture of starch maleic half-ester （SM） and poly（vinyl alcohol） （PVA） was subjected to freezing-thawing...A novel starch-based hybrid hydrogel was formed by physical and mild steps. Firstly, aqueous solution of a mixture of starch maleic half-ester （SM） and poly（vinyl alcohol） （PVA） was subjected to freezing-thawing cycles to generate a physical functional SM/PVA hydrogel. Subsequently, the SM/PVA/ HA hybrid hydrogel was obtained through the alternate soaking process. The structure and morphology of the hydrogels were examined with Fourier transform infrared spectra （FTIR）, X-ray diffraction （XRD） analysis, thermogravimetric analysis （TGA） and scanning electron microscopy （SEM）. It was found that the existence of carboxylic groups on SM chains not only enabled SM/PVA hydrogel to be pH-sensitive, but also enhanced the formation of hydroxyapatite in the hydrogel via chelating calcium ions onto the matrix.展开更多
基金Supported by the Natural Science Foundation of Fujian Province of China(Nos.2010J01291 and E1010026)the Basic Research Item of Huaqiao University(No.JB-JD1001)
文摘A novel starch-based hybrid hydrogel was formed by physical and mild steps. Firstly, aqueous solution of a mixture of starch maleic half-ester （SM） and poly（vinyl alcohol） （PVA） was subjected to freezing-thawing cycles to generate a physical functional SM/PVA hydrogel. Subsequently, the SM/PVA/ HA hybrid hydrogel was obtained through the alternate soaking process. The structure and morphology of the hydrogels were examined with Fourier transform infrared spectra （FTIR）, X-ray diffraction （XRD） analysis, thermogravimetric analysis （TGA） and scanning electron microscopy （SEM）. It was found that the existence of carboxylic groups on SM chains not only enabled SM/PVA hydrogel to be pH-sensitive, but also enhanced the formation of hydroxyapatite in the hydrogel via chelating calcium ions onto the matrix.
