欢迎访问过程工程学报, 今天是

›› 2002, Vol. 2 ›› Issue (4): 0-0.

• 4 •    

有机阴离子柱撑水滑石的插层组装及超分子结构

李殿卿，冯桃，Evans D G，段雪   

  1. (北京化工大学可控化学反应科学与技术基础教育部重点实验室，北京100029
  • 出版日期:2002-08-20 发布日期:2002-08-20

Assembly and Structural Characteristics of Organic Anion-pillared Hydrotalcites

LI Dian-qing, FENG Tao, Evans D G, DUAN Xue   

  1. State Key Lab. Biochem. Eng., Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China
  • Online:2002-08-20 Published:2002-08-20

PDF

被引次数

142

摘要： 以水滑石Mg4Al2(OH)12CO3.4H2O为前体，采用离子交换法进行插层组装制备了丁二酸、己二酸、十二烷基磺酸、对羟基苯甲酸、苯甲酸和对苯二甲酸柱撑水滑石，并用XRD, FTIR和DTA测试技术对样品进行了表征. 结果表明，通过控制离子交换条件，6种有机酸根离子可以插入水滑石的层间完全取代CO32–离子，并形成具有超分子结构的稳定有机阴离子柱撑水滑石.

关键词: 层状前体, 柱撑水滑石, 离子交换, 插层组装, 超分子结构

Abstract: The alternant submerged/unsubmerged cell culture of Saussurea medusa in a novel 1.8 L periodically submerged air-lift bioreactor was investigated. The bioreactor contains two layers of meshes. They provide support for cells in unsubmerged culture, but when being pulled slant the culture can be released by circulating medium from the meshes for submerged culture. The effects of the submerged/unsubmerged period on cell growth, biosynthesis of flavonoids and cell aggregate were studied. It was found that 5 min/4 h was the optimum submerged/unsubmerged period when the culture was carried out at air flow rate of 40 L/h and an inoculum (DW) of 2~3 g/L. After 20 d culture, the maximum biomass and production of flavonoids reached 9.6 g/L and 338 mg/L respectively, and the distribution of cell aggregates was the optimal as well.

Key words: layered double hydroxide, pillared hydrotalcite, ion exchange, assembly, supramolecular structure

中图分类号: