【作者】 李利苹；

【导师】 马晓明； 杨林；

【作者基本信息】 河南师范大学 ， 无机化学， 2012， 硕士

【摘要】 多孔材料在当前的材料科学中是发展非常迅速的一种多功能材料，特别是那些孔径在纳米量级的多孔材料，因其特殊的孔结构而具有许多独特的性能和广泛的应用性，在世界范围内的科学界以及工商界都引起了重视，涉及到的应用领域有化工、医药、环境保护等。多级复合孔材料是随着多孔材料的发展而产生的一种不同于单一孔材料的新型多孔材料，由于这种复合孔材料具有两种或两种以上的不同孔径的孔结构，并且按孔径逐级分布，故而它的各方面性质更优越，比如它具有更大的比表面积，更高的选择性及更优良的吸附能力等，从而其应用性更强。另外，在复合孔材料的特殊结构基础上，具有复合孔结构的无机/有机杂化材料由于其结合了有机和无机成分潜在的物理性质和化学性质，引起了现代科学研究的高度重视。本论文主要工作是利用无毒性、操作简单的绿色合成方法制备了一些具有特殊形貌碳酸盐/多糖复合孔杂化材料，并研究了其在药物负载运输和废水处理中的潜在应用。首先介绍了复合孔材料的研究现状，并概述了无机/有机杂化材料的概念、特点和应用。最后介绍了本论文的研究背景、研究内容以及本论文的特点。在本论文的选题中，我们选择了以具有广泛药理活性的食用菌多糖为有机物基质，其中主要尝试了香菇多糖。在选定的多糖基质作用下，室温条件下，以CaCl₂为钙源，用一种简单的方法在较短的时间内合成了具有复合孔结构的碳酸钙/多糖微球并研究了其在药物负载运输和废水处理中的潜在应用。此外，还以可溶性淀粉为基质，室温下简易合成了具有复合孔结构的梭形空壳状碳酸钡/淀粉材料，并从原料的用量、浓度及反应时间等各方面做了系统性研究。同时，还利用扫描电子显微镜（SEM），场发射扫描电子显微镜（FESEM），高倍透射电镜（HRTEM），X射线粉末衍射（XRD），热重差热分析（TG-DTA），傅里叶转换红外光谱（FT-IR）等手段，对所得杂化复合孔材料的形貌、大小及其组成等做了检测。另外，紫外可见分光光度仪（UV-vis）及原子吸收光谱（AAS）对所得碳酸钙材料在药物负载运输和废水处理中的潜在应用进行了检测。所得结果如下：利用此种方法所得到的碳酸钙颗粒为1²μm的球状，并具有复合孔结构。通过在药物运输方面的实验结果发现，负载有盐酸阿霉素这种药物的碳酸钙/多糖杂化复合孔材料不同pH值的介质中，对所负载药物的释放量是随着pH值的降低而增加的，这说明此体系对pH值的变化具有很强的敏感性，故而对具有弱酸性的癌细胞有着选择性的药物释放，在药物载体方面有着一定的应用前景。此外，通过其对几种重金属离子的吸附结果发现，碳酸钙/多糖杂化复合孔材料对大浓度及微量金属离子的吸附效果均很强。而碳酸钡/淀粉杂化复合孔产品则随反应物浓度及反应时间的变化分别得到梭形，花生，花枝，球状等形貌。本论文以香菇菌多糖及淀粉为有机基质，在室温条件下利用简单绿色的方法得到了具有优良性能的碳酸盐/多糖杂化复合孔材料，这对无机/有机复合孔杂化材料的研究提供了一种新的实验依据，也对研究复合孔杂化材料合成的机理提供了重要的借鉴和指导作用。更多还原

【Abstract】 Porous material has been developed rapidly in modern material science as a kind of multifunctionalmaterial, especially the ones the pore size of which is around nanometer. Because of the particular porousstructure, the materials are of many special characteristics and applied widely, which arouses greatattentions in the field of science as well as industrial and commercial circles. Its applications involvechemical, pharmaceutical, environmental protection and so on. With the development of porous materials,composite-pore material emerges as a new style different from those porous materials with single pore size.It has two or more than two kinds of pore sizes and different sized pores are arranged regularly, so itpossesses more wonderful functions and would be applied more widely. In addition, on the basic ofcomposite-pore material, organic/inorganic hybrid materials with composite-pores have special constituentand also have attracted much attention because of the specific physical and chemical properties.In this article, we simply synthesized carbonate/polysaccharose hybrid porous materials with specialmorphologies successfully through a facil and nontoxic method and studied its potential applications indrug loading and transportation as well as the waste water treatment. First of all, we introduced theclassification, characteristics and applications of porous materials and then discussed more about theconcept, features as well as applications of composite-pore material. Finally, the research content andcontext and features of this dissertation were also presented.In the selection of this article, we chose polysaccharide extracted from edible fungi with extensivepharmacological activities as organic matrix and lentinan was mainly tried. Calciumcarbonate/polysaccharide hybrid porous microsphere was synthesized through a facile method in a shorttime and its capability in drug load and transportation and waste water treatment was studied. Furthermore,barium carbonate/soluble starch was prepared in room temperature using soluble starch as matrix. Theeffect of several factors such as the amount and concentration of raw material and reaction time werestudied systematically. Samples was characterized by scanning electron microscopy(SEM), field emissionscanning microscopy (FESEM), X-ray powder diffraction (XRD), transmission electron microscope (TEM),Thermogravmetric/Differential Thermal Analyzer (TG-DTA), Fourier Transform Infrared Spectrometer (FT-IR), High resolution transmission electron microscope (HRTEM), morphology, size and components ofhybrid porous complexes were tested. Furthermore, Ultraviolet-Visible Spectrometer (UV-VIS) and atomicabsorption spectrophotometer (AAS) were also applied to analyze the application of calcium carbonate indrug load and transportation and waste water treatment.The results are as follows: calcium carbonate particles we received are complex porous spheres withdiameter of1-2μm.Through drug transportation experiments we discovered that drug released amount ofcarbonate/polysaccharide complex porous materials loaded with Doxorubicin varied with pH value ofsystem. The amount of drug release ascend with reduce of pH value, which demonstrates that complexsystem are sensitive to pH value of surrounding environment. So it would release drugs selectively to theweakly acidic cancer cells and will be a promising material as drug carrier. From the results of adsorptionof heavy metal ion, carbonate/polysaccharide complex porous materials show excellent performance ofadsorption of high concentration or trace metal ion. Morphology of Barium carbonate/starch hybrid porouscomplex varied with concentration of reactants and reaction time, such as spindle shape, peanut shape,spray shape or sphere shape.In this dissertation, using polysaccharide extracted from edible fungi and soluble starch as organicmatrix, carbonate/polysaccharide hybrid porous materials with excellent performance were producedthrough facile method, which will be a guide for the research of synthesis mechanism of hybrid porousmaterials.更多还原