Sandwich structure tubular fiber and preparation method thereof

The invention provides a tubular fiber with a sandwich structure and a preparation method of the tubular fiber, a MnO2 nanowire is used as a hard template, the surface of the MnO2 nanowire is sequentially coated with hydrogenated graphdiyne (HsGDY), polydopamine (PDA) and hydrogenated graphdiyne (HsGDY) by utilizing a Plaser coupling reaction of 1, 3, 5-triacetylene benzene and an oxidative self-polymerization reaction of dopamine (DA) in a weakly alkaline solution, so that a MnO2 (at) HsGDY (at) PDA (at) HsGDY nanowire with a four-layer core-shell structure is obtained, and the MnO2 (at) HsGDY (at) PDA (at) HsGDY nanowire with a four-layer core-shell structure is prepared. And removing the inorganic template through high-temperature calcination and oxalic acid etching to obtain the tubular fiber HsGDY (at) NC (at) HsGDY with a sandwich structure, and the tubular fiber has a three-layer hollow tubular structure. 本发明提供了一种三明治结构管状纤维及其制备方法，以MnO2纳米线为硬模板，利用1,3,5-三乙炔苯的Glaser coupling反应和多巴胺(DA)在弱碱性溶液中的氧化自聚合反应，在MnO2纳米