毕业论文

打赏
当前位置: 毕业论文 > 化学论文 >

环糊精与热塑性聚氨酯包合物的可控合成及表征

时间:2021-10-19 20:01来源:毕业论文
环糊精及其衍生物在很多的方面有应用。在药物化学中环糊精提高药物稳定性,增加药物的溶解度,缓解局部刺激起到缓释作用,使液体药物粉末化可以防挥发而保护药效。除了以上在

摘要本课题主要研究的就是一种超分子化合物,热塑性聚氨酯(TPU)与β-环糊精(β-CD)的包合物的合成与表征。环糊精早在1891年就由Villiers发现,1904年,Schardinger确定他的结构,并命名为环状低聚糖。β-环糊精是一个中间有直径为0。7~1。0nm的空心洞穴的锥形结构,内疏水,外亲水这一特殊的结构使得β-环糊精对很多分子都具有包络作用。环糊精作为主体分子能通过分子间非共价键的相互作用和一些结构大小正好可以与空心洞穴匹配生物、无机和有机分子等客体分子形成主-客体包合物。所谓“包合”就是彼此完成识别的过程,主体与客体通过分子间化学键(非共价键)相互作用,最后使得客体分子顺利进入主体内部形成一种新的化学大分子的现象。一般形成包合物后因为化学结构的改变会改变客体分子的一些物理化学性能,如溶解度、抗氧化性、稳定性、回弹性以及光学性质等。本课题我们主要研究不同比例下热塑性聚氨酯与环糊精的包合物的可控合成,以及在通过对这些的包合物做一些表征来了解微观结构或是力学性能是否有不同。通过以热塑性聚氨酯为主体与β-环糊精包合物的不同质量比下可控合成,以及不同比例下包合物的测试与表征。通过Tensile Test、FTIR、TGA、DSC、SEM等对IC-TPUs进行了详细表征。结果表明:我们成功地完成了IC-TPUs的可控合成,且与NEAT TPU材料相比,包合物的性能均有一定的改变,IC-TPUs的强度比纯TPU有显著提高,且热稳定性也有很明显的提高。73019

环糊精及其衍生物在很多的方面有应用。在药物化学中环糊精提高药物稳定性,增加药物的溶解度,缓解局部刺激起到缓释作用,使液体药物粉末化可以防挥发而保护药效。除了以上在药物化学方面的应用,环糊精及其衍生物在化妆品化学、食品化学、生物化学、材料化学等领域也有着非常普遍的应用。

毕业论文关键词:超分子化学; 热塑性聚氨酯; β-环糊精;包合物; 可控合成; 表征

ABSTRACT The main topic of research is a kind of super-molecular compounds, thermoplastic polyurethane (TPU) with β-cyclodextrin (β-CD) inclusion complex。 Cyclodextrin as early as 1891 by the discovery Villiers, 1904, Schardinger determine his structure, and named cyclic oligosaccharide。 β-cyclodextrin is a cone-shaped structure in the middle of the hollow cave 0。7 ~ 1。0nm diameter, inner hydrophobic, hydrophilic outer structure of this particular makes β-cyclodextrin molecule has a lot envelope effect。 Cyclodextrin as host molecule through interactions and some structural sizes intermolecular non-covalent bonds can just match the hollow cave biology, inorganic and organic molecules forming the main guest molecule - guest inclusion complex。The so-called "inclusion" is to complete the process of identifying each other, subject and object by intermolecular chemical bonds (non-covalent) interactions, and finally making the guest molecules within the body to form a smooth entry into the new phenomenon of macromolecular chemistry。 After the general form inclusion because of changes in the chemical structure of the guest molecules will change some physical and chemical properties, such as solubility, oxidation resistance, stability, resilience and optical properties。 This paper, we focus on controllable synthesis of different proportions of thermoplastic polyurethane cyclodextrin inclusion complex, as well as by doing some of these complex characterize the microstructure or to see if there are different mechanical properties。 By thermoplastic polyurethane body and β-cyclodextrin inclusion of different mass ratios controlled synthesis, and test and characterization at different ratios inclusion。By Tensile Test, FTIR, TGA, DSC, SEM and so on IC-TPUs were characterized in detail。 The results showed that: we successfully completed the controlled synthesis IC-TPUs, and compared with the NEAT TPU material, complex performance there is a certain change, IC-TPUs strength than pure TPU has improved significantly,And the thermal stability is also a noticeable increase。 环糊精与热塑性聚氨酯包合物的可控合成及表征:http://www.youerw.com/huaxue/lunwen_83155.html

------分隔线----------------------------
推荐内容