单手螺旋酚醛树脂及碳质纳米管的制备

发布时间：2018-05-28 09:13

本文选题：螺旋 + 酚醛树脂　；参考：《苏州大学》2015年硕士论文

【摘要】：螺旋材料在对映体拆分、不对称催化等领域具有潜在的应用价值,引起了国内外研究者的广泛关注。随着碳材料的发展,螺旋结构的碳材料也逐渐走进人们视野,在近三十年的发展历程中,科研工作者开发出了多种制备螺旋碳材料的方法,但是控制螺旋碳材料的单一手性仍然是个难题。超分子模板法是制备单手螺旋材料的重要方法,同时,结构高度交联的酚醛树脂因为具有较高的热稳定性和较高产炭率,可作为碳前驱体制备各种结构的碳材料。本文的工作是利用超分子模板法制备单手螺旋的酚醛树脂,进一步碳化得到单手螺旋碳材料。具体包括两部分内容:一方面,采用手性阳离子型模板剂制备单手螺旋的2,4-二羟基苯甲酸-甲醛树脂,通过研究树脂的形成过程,提出了该树脂可能的形成机理,2,4-二羟基苯甲酸通过分子间阴阳离子作用结合在单手螺旋的超分子自组装体表面,与甲醛原位聚合,得到单手螺旋的2,4-二羟基苯甲酸-甲醛树脂。另一方面,采用苯甘氨酸型模板剂制备了单手螺旋的3-氨基苯酚-甲醛树脂,进一步碳化得到了对应的碳质纳米管,利用圆二色谱(CD)研究了螺旋碳材料的光学活性,并通过理论计算推测CD信号来源于碳材料中芳环的手性堆积。研究发现,改用苯丙氨酸型模板剂,可得到直的3-氨基苯酚-甲醛树脂和碳质纳米管;与此同时用间苯二胺作为前驱体,则得到内螺的间苯二胺-甲醛树脂,结果表明该方法可以合成不同结构和不同种类的材料。
[Abstract]:Helical materials have potential applications in enantiomeric resolution and asymmetric catalysis, and have attracted wide attention from researchers at home and abroad. With the development of carbon materials, spiral carbon materials have gradually entered the field of vision. In the past 30 years, researchers have developed a variety of methods to prepare spiral carbon materials. But controlling the single chirality of spiral carbon is still a problem. The supramolecular template method is an important method for the preparation of single-hand helical materials. Because of its high thermal stability and high carbon yield, the highly crosslinked phenolic resins can be used as carbon precursors to prepare carbon materials with various structures. In this paper, single-hand helical phenolic resin was prepared by supramolecular template method and further carbonized to obtain single-hand spiral carbon material. It includes two parts: on the one hand, the single-hand helical 2o 4-dihydroxybenzoic acid-formaldehyde resin was prepared by using chiral cationic template, and the formation process of the resin was studied. The possible formation mechanism of the resin was put forward. The resin was polymerized with formaldehyde on the surface of single-hand helical supramolecular self-assembly by the interaction of anion and anion between molecules, and the single-hand helical 2-dihydroxybenzoic acid-formaldehyde resin was obtained. On the other hand, the single-hand helical 3-aminophenol-formaldehyde resin was prepared with phenylglycine template, and the corresponding carbon nanotubes were obtained by further carbonization. The optical activity of the helical carbon materials was studied by circular dichroism chromatography (CD). The CD signal is deduced from the chiral stacking of aromatic rings in carbon materials by theoretical calculation. It was found that the straight 3-aminophenol-formaldehyde resin and carbon nanotubes could be obtained by using phenylalanine template, and at the same time, the m-phenylenediamine resin and formaldehyde resin of inner snail could be obtained by using resorcinenediamine as the precursor. The results show that this method can be used to synthesize materials with different structures and different kinds of materials.
【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】：TQ127.11;TQ323.1

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