摘要在本文中我们报道了一种由温和的水热法制得的新型纤文状介孔二氧化硅纳米粒子(FMSNs),FMSNs 具有迷人的纤文状形貌,且孔径分布沿着粒径方向逐渐增大。在FMSNs清晰的TEM与SEM图片中,值得注意的是,从微粒中心到表面逐渐增大的介孔孔道提供了易于触及的高表面积,并且利于药物分子抵达孔道内部的活性位点。这一特征对药物缓释体系十分重要。这意着比起一般结构的介孔二氧化硅粒子,纤文状介孔二氧化硅微球更加有利于药物分子的担载。对于这种新型介孔二氧化硅材料,在不同配比的条件下,我们实现了对FMSNs材料的可控制备,并着重研究了其尺寸和孔径与介孔结构对药物缓释性能的影响。并通过细胞活性实验证明了FMSNs良好的生物相容性。而在抗癌性实验中DOX@FMSNs展示出令人印象深刻的表现。34912
毕业论文关键词: 介孔二氧化硅;纤文状;生物医用材料;药物缓释
Engineering and Drug Delivery Application of Fibrous Mesoporous Silica
Abstract
In this paper, a new type of mesoporous silica microspheres with fibrous morphology (FMSNs) has been successfully synthesized through a gentle hydrothermal method. FMSNs is so fascinating with its’ pore size distribution increased gradually along the direction of particle size. The results reveal that FMSNs exhibits interesting fibrous morphology with fibers coming out from the center and distributing uniformly in all directions. Notably, the open pore channel offers easily accessible high surface area, which is crucial for drug delivery system because of the outstanding accessibility to the active sites inside the pores. Which means that, comparting to the ordinary structure of mesoporous silica particles, the fibrous mesoporous silica microspheres are more favorable for the drug loading. For this new type of mesoporous silica materials, under the condition of different ratio, we completed the FMSNs preparation controllable, and studied the influence of the nanoparticles size, the pore size as well as the pore structure to the drug release properties emphatically. The biocompatibility of FMSNs was proved by cell activity experiment. Besides, DOX@FMSNs demonstrated impressive performance in the anticancer experiments.
Keywords : Mesoporous silica materials; Drug delivery system and controlled release; Fibrous morphology; Biomedical materials
目录
1 绪论 1
1.1 介孔材料研究概述 1
1.1.1 多孔材料概述 1
1.1.2 介孔材料的发展研究概述 2
1.1.3 介孔材料的结构 3
1.1.4 介孔材料的合成机理 5
1.2 介孔二氧化硅纳米材料(MSNs) 7
1.2.1 单分散性介孔二氧化硅微球的制备 8
1.2.2 介孔二氧化硅的功能化 9
1.2.3 纤文状介孔二氧化硅(FMSNs) 11
1.3 介孔二氧化硅在生物医药上的应用 11
1.3.1 介孔二氧化硅纳米颗粒的生物相容性 11
1.3.2 介孔二氧化硅在药物缓释体系中的应用 12
1.3.3 介孔二氧化硅材料在生物医学其它方面的应用 14
1.4 课题设计与主要内容 14
2 实验部分 16
2.1 实验原料 16
2.2 实验方法 16
2.2.1 FMSNs 材料的制备 16
2.2.2 模型药物阿霉素(DOX)的担载 17
2.3 材料的结构与性能表征 17
2.3.1 傅立叶变换红外光谱(FT-IR) 17
2.3.2 激光粒度仪 17
2.3.3 扫描电子显微镜(SEM) 18
2.3.4 透射电子显微镜(TEM) 18 纤维状介孔二氧化硅的制备与性能表征及其药物缓释研究:http://www.youerw.com/cailiao/lunwen_32627.html