Chloropropyl-functionalized mesoporous MCM-41（MCM-41-（CH2）3Cl） was synthesized in alkaline medium by the microwave radiation one-pot method, using cetyltrimethy-lammoniumbromide （CTAB） as novel template, tetraethoxysilane （TEOS） as silica source, and chloropropyltriethoxysilane （C1PTES） as the coupling agent. The microstructure of MCM-41-（CH2）3Cl was characterized by the means of X-ray diffraction （XRD）, nitrogen absorption-desorption, Fourier transform infrared spectroscopy （FT-IR）, scanning electron microscopy （SEM）, and transmission electron microscopy （TEM）. The results show that a successful synthesis of MCM-41-（CH2）3Cl with well structure is obtained. The optimal microwave power is 120 W and the best microwave time is 50 rain. The dosage of chloropropyltriethoxysilane on the structure of chloropropyl-functionalzed MCM-41 was also investigated. It is found that the chloropropyltriethoxysilane volume between 0.8 mL and 1.6 mL is favorable for the formation of highly ordered MCM-41-（CH2）3Cl mesostructure.
目的:优选天冬多糖的最佳方法和提取工艺。方法:以天冬提取液中多糖的含量和提取物得率为指标,以棉子糖为标准,考察了冷水浸提法、乙醇回流法、纤维素酶法、胃蛋白酶法、果胶酶法、复合酶法、超声法、超声复合法提取天冬多糖的优劣,确定超声复合酶法为最佳提取方法。以超声时间、超声功率、料液比、pH值4个因素对超声复合酶法的提取工艺进行了优选。结果:得到最佳的提取工艺条件为液料比75∶2,超声时间90 m in,超声功率83W,pH值5.0。结论:超声复合酶法提取天冬的产率最高,是水浸提法的3.7倍,乙醇回流法的2.1倍,操作简便,工艺条件稳定。
目的优选金银花中绿原酸的最佳提取方法和提取工艺。方法以金银花中绿原酸的含量为指标,考察了水蒸气蒸馏法、超声波提取法和醇提法提取金银花中绿原酸优劣,确定超声法为最佳提取方法。通过正交实验,以溶剂浓度、预浸时间、超声时间和pH值4个因素对超声法的提取工艺进行优选。结果得到最佳的提取工艺条件为:乙醇浓度为60%,pH值1,预浸12 h,超声提取2次,45 m in/次;此条件下绿原酸提取率可达5.62%。影响程度为:pH值>预浸时间>超声时间>溶剂浓度。结论工艺简单,提取条件温和,提取率高,可为提取绿原酸的大规模产业化所应用。
