反萃分散组合液膜分离提取中草药中的生物碱研究
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摘要
生物碱是一类具有药理活性的含氮碱性化合物,多存在中草药中。因此,从中草药中提取生物碱具有很高的药用价值。液膜分离技术具有简单、高效、快速、选择性高和易于实现自动化等特点,在生物工程、湿法冶金、工业废水中金属离子与有机污染物提取等领域的应用均展示了优越性能。然而,将液膜技术应用于中草药中生物活性成分分离提取的研究报道很少。论文基于克服传统的支撑液膜和乳状液膜的缺陷,对反萃分散组合液膜(SDHLM)分离提取中草药中生物碱开展了研究,并根据生物碱分子具有较大直径的特点,尝试利用热诱导相分离原理成功制备了新型微孔聚丙烯支撑膜,考察了该支撑液膜在黄连生物碱分离提取中的应用。论文具体内容如下:
     1.介绍了液膜的发展史及其分离机理与应用,重点阐述了反萃分散组合液膜的特点与应用。
     2.以D2EHPA-煤油-HCl的反萃分散组合液膜体系对博落回中的原阿片碱、别隐品碱、血根碱、白屈菜红碱进行了分离提取,在优化的实验条件下,该液膜体系对原阿片碱、别隐品碱、血根碱与白屈菜红碱的渗透系数分别达到了1.66、1.99、2.98与3.06×10-4cm/s,迁移率分别为68%、77%、83%与85%。
     3.以D2EHPA-煤油-H2SO4的反萃分散组合液膜体系分离提取了黄连中的药根碱、巴马亭、小檗碱。系统优化后的液膜条件下,药根碱、巴马亭和小檗碱的渗透系数分别达到了4.43、6.09、6.25×104cm/s,迁移率分别达到了90.4%、92.1%、95.3%,取得了很好的分离提取效果。
     4.以D2EHPA-煤油-HCl反萃分散组合液膜体系分离提取了延胡索中的延胡索乙素、巴马亭、去氢紫堇碱。在最佳的液膜条件下,这三种生物碱的渗透系数分别达到了3.78、4.91、4.93×10-4 cm/s,迁移率分别达到了87.8%、94.2%、95.7%。实验结果表明延胡索中的生物碱得到了有效地分离提取。
     5.以邻二甲苯作为稀释剂、聚乙二醇作为成孔剂,用热诱导相分离法成功制备了性能优越的聚丙烯支撑膜,用扫描电镜、接触角测量仪等对支撑体的表面形态、微孔的孔径分布、疏水性能等方面进行了表征。将制备的支撑膜用于分离提取黄连中的药根碱、巴马亭和小檗碱,取得了很好的提取效果。
Alkaloid is a kind of bio-active compound existed in Chinese medicinal herbs. The separation and extraction of alkaloids are significant. Liquid membrane, as a simple, quick, effective, high-selective and economic separation and extraction technique, has been widely used in the fields of biological engineering, hydrometallurgy, extraction and separation metal ions and organic pollutant from the industrial wastewaters. However, the reports about separation and extraction of active ingredients from Chinese medicinal herbs using liquid membrane are very few due to the complex composition and multiinterferent of the herbs. For overcoming the shortages of the supported liquid membrane and the emulsion liquid membrane, a strip dispersion hybrid liquid membrane (SDHLM) is developed to separate and extract alkaloids in Chinese medicinal herbs. According to the need for transport larger molecule diameter of alkaloids, a kind of novel microporous polypropylene membrane with controlled pore sizes has been prepared via thermally induced phase separation. And the membranes employed as the supported membrane in SDHLM system to extract and separate alkaloids from Coptis was investigated. The details are as follows:
     1. This paper reviews the development history, the classification, the separation mechanism, and the applications of the liquid membrane technology. The characteristic and application of the SDHLM were elaborated in detail in this work.
     2. The separation and extraction of isoquinoline alkaloids, protopine, allocryptopine, sanguinarine, chelerythrine in the fruits of Macleaya cordata (willd) R. Br. were carried out with SDHLM system of D2EHPA-kerosene-HCl. Under the optimized experimental conditions, the permeability coefficients of protopine, allocryptopine, sanguinarine, and chelerythrine are reached 1.66,1.99,2.98, and 3.06×10-4 cm/s, respectively. And the transport efficiencies are 68%,77%, 83%, and 85%, respectively. The results indicate that the present SDHLM system can effectively extract and separate above four kinds of alkaloids from Macleaya cordata (willd) R. Br.
     3. A systematic research on the separation and extraction of isoquinoline alkaloids, jatrorrhizine, palmatine, and berberine from the Coptis roots with SDHLM system of D2EHPA-kerosene-H2SO4 was studied. Under the optimized experimental conditions, the permeability coefficients of jatrorrhizine, palmatine, and berberine are reached 4.43, 6.09,6.25×10-4 cm/s, respectively. And the transport efficiencies are 90.4%,92.1%,95.3%, respectively. The results show the three main alkaloids in Coptis roots can be separated and extracted effectively with the present SDHLM system.
     4. SDHLM system of D2EHPA-kerosene-HCl was developed for the separation and extraction of tetrahydropalmatine, palmatine, and dehydrocorydaline from the tuber of Corydalis yanhusuo W. T. Wang. Under the optimized experimental condition, the permeability coefficients of tetrahydropalmatine, palmatine, and dehydrocorydaline are reached 3.78,4.91, and 4.93×10-4 cm/s, respectively. And the transport efficiencies are 87.8%,94.2%, and 95.7%, respectively. The results indicate that the present SDHLM system can extract and separate the main alkaloids from Corydalis yanhusuo W. T. Wang effectively.
     5. Polypropylene microporous membrane with controlled pore sizes was prepared via thermally induced phase separation, using xylene as diluent and polyethylene glycol as the pore-forming agent. Scanning electron microscope and contact angle measurement were employed to charaterization of the surface morphology and the hydrophobic property of the membrane. The application of the prepared polypropylene microporous membrane in separation and extraction of alkaloids in Coptis was investigated with SDHLM. The results indicated that the prepared microporous polypropylene membrane is high performance.
引文
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