碳纳米管内填充智能水凝胶复合材料的制备与性质研究

发布时间：2018-04-23 03:02

本文选题：碳纳米管阵列 + 水凝胶　；参考：《苏州大学》2015年硕士论文

【摘要】：碳纳米管具有独特的物理化学性质以及许多优异的性能,长期以来一直是纳米科学和材料领域的研究热点。以往碳纳米管的研究工作多集中于外部的修饰与复合,针对碳纳米管内部受限空间中物质的特殊性质的研究相对缺乏。这主要是由于传统填充方法的局限,使得制备复杂的内填充碳纳米管复合材料存在很大困难。本文以预先制备的垂直取向碳纳米管阵列/环氧树脂复合膜为起始原料,设计并采用不同反应物“对向扩散”的方法,在直径15 nm的碳纳米管内部原位聚合填充了温敏型和p H敏感型水凝胶以及荧光水凝胶,通过高分辨透射电镜(HRTEM)、显微红外光谱(Micro-FITR)以及荧光共聚焦显微镜(confocal laser scanning fluorescence microscope)等对填充复合材料进行了表征。实验发现,我们的方法大大提高了碳纳米管内部填充的效率及可控性,同时避免了水凝胶在碳管外部的包覆。更为重要的是,我们发现碳纳米管内部填充智能水凝胶不仅会增大碳纳米管内部的亲水性,同时还会形成一种智能的离子传输通道,通过改变外部条件(温度、p H),可以调控离子在通道内部的传输速率。此外,碳纳米管还具有保护其内部荧光水凝胶不被淬灭的优点。这些独特的性质使碳纳米管内填充智能水凝胶复合材料有望在智能离子通道、药物控制释放以及生物成像技术等领域得到应用。
[Abstract]:Carbon nanotubes (CNTs), with their unique physical and chemical properties and many excellent properties, have been the focus of research in nanoscience and materials for a long time. In the past, the research work of carbon nanotubes mainly focused on the external modification and composite, but the study on the special properties of substances in the confined space of carbon nanotubes was relatively lacking. This is mainly due to the limitation of traditional filling methods, which makes it very difficult to fabricate intra-filled carbon nanotube composites. In this paper, the vertical aligned carbon nanotube array / epoxy composite film was used as the starting material to design and adopt the "opposite diffusion" method of different reactants. The in-situ polymerization of carbon nanotubes with a diameter of 15 nm was filled with thermal-sensitive and p-H-sensitive hydrogels and fluorescent hydrogels. The filled composites were characterized by high resolution transmission electron microscopy (TEM), micro-infrared spectroscopy (Micro-FITR) and confocal laser scanning fluorescence microscopes. It is found that our method can greatly improve the efficiency and controllability of filling carbon nanotubes and avoid the coating of hydrogels outside carbon nanotubes. More importantly, we found that filling carbon nanotubes with smart hydrogels not only increases the hydrophilicity of carbon nanotubes, but also forms an intelligent ion transport channel. The rate of ion transport within the channel can be regulated by changing the external conditions (temperature). In addition, carbon nanotubes also have the advantage of protecting their internal fluorescent hydrogels from quenching. Due to these unique properties, smart hydrogel composites filled in carbon nanotubes are expected to be used in intelligent ion channels, drug controlled release and bioimaging techniques.
【学位授予单位】：苏州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.1;TB33

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