论文部分内容阅读
本文用十六烷基三甲基溴化铵(CTAB)作为试剂,通过软模板法合成介孔二氧化硅,利用在合成过程中,由伪莫尔转动所引起的微粒内部的大量缺陷,通过溶剂抽提,形成了具有空腔结构的介孔二氧化硅纳米微球.采用透射电子显微镜(TEM)、X射线粉末衍射仪(XRD)、N2吸附-脱附等手段对产物的形貌和结构进行了详细的表征.并以溴甲酚绿作为目标物,通过改变压强和温度,调节溴甲酚绿进入空心SiO2微球中的不同部位,对所制备的空腔介孔二氧化硅微球进行染料的装载和释放试验.结果显示该微球腔壁具有可渗透性和缓释性,而且在负压蒸发溶剂的情况下可以得到较高的药物负载量和极大地提高缓释性能.
In this paper, cetyltrimethylammonium bromide (CTAB) was used as a reagent to synthesize mesoporous silica by soft-template method. By using a large number of defects inside the particles caused by the rotation of the Pseudo-Moar during the synthesis process, Solvent extraction to form a mesoporous silica nanosphere with cavity structure.The morphology and morphology of the product were characterized by transmission electron microscopy (TEM), X-ray powder diffraction (XRD) and N2 adsorption-desorption Structure was characterized in detail.And bromocresol green as the target, by changing the pressure and temperature, adjust bromocresol green into different parts of the hollow SiO2 microspheres, the prepared hollow mesoporous silica micro The results showed that the wall of the microsphere had permeability and sustained release, and the drug load could be higher and the sustained release performance could be greatly improved when the solvent was evaporated under negative pressure.