Vapor phase preparation of carbon nanocoils and the characterization

1)详细研究了碳纳米线圈（CNC）的制备条件。(1) Fe-Ni（10%）和Pd/Pt分子筛负载催化剂和Al_2O_3细粉负载催化剂是CNC量产最有效的催化剂。(2)采用SUS304金属催化剂在石英衬底上摩擦得到高纯度的单线圈。2)对CNC的形貌、精细结构和生长机理进行了研究。(1)观察到线圈直径在几十nm以下的碳纳米线圈以扭曲形式为主，无法获得大量的弹簧状纳米线圈。(2)纳米线圈以单线圈为主，提出了纳米线圈的生长机理。(3)纳米线圈的结晶度高于微线圈。(4)有时会观察到线圈手性的变化，并提出了其变化机理。(5)获得了外施加电磁波和外施加电磁波得到的具有平坦纤维截面的扁平线圈，并对其生长机理进行了分析。3)测试了材料的机械、电磁、触觉和吸氢性能。(1)高温热处理降低了线圈的弹性(2)CNC/PMMA复合材料对-20dB以上10-110GHz电磁波的吸收。(3)数控/弹性树脂具有很高的触觉感应性能和判别性能。(4)通过无序CNC获得了高吸氢性能。

1)Preparation conditions of carbon nanocoils (CNC) were examined in detail.(1)The Fe-Ni (10%) and Pd/Pt catalysts supported on molecular Sieves or Al_2O_3 fine powder were the most effective catalysts for the mass production of CNC. (2)The single coils was obtained with high purity using SUS304 metal catalyst which was rubbed on the quartz substrate.2)The morphology, fine structure and growth mechanism of CNC were examined.(1)I was observed that the carbon nanocoils with a coil diameter below several ten nm has mainly twisted-form, and spring-like nanocoils could not be obtained in a large amount. (2)Nanocoils was mainly a single coil and the growth mechanism was proposed. (3)The nanocoils have higher crystallinity than that of microcoils. (4)Changing coiling-chirality through a piece of coil was sometimes observed, and the changing mechanism was proposed. (5)The flat coils with flat fiber cross section, those were obtained with applying outer electromagnetic or magnetic waves, were obtained, and the growth mechanism was proposed.3)Mechanical, electro-magnetic, tactile sensing and hydrogen absorption properties were examined.(1)The elasticity of the coils wasdecreased by high temperature heat-treatment (2)CNC/PMMA composites absorbed above -20dB the electromagnetic waves of 10-110GHz. (3)CNC/elastic resin show high tactile sensing properties with very high sensing and high discrimination properties. (4)The high hydrogen absorption properties was obtained by disordered CNC.