共查询到18条相似文献,搜索用时 187 毫秒
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碳纳米管/聚合物复合材料 总被引:10,自引:0,他引:10
本文简要介绍了碳纳米管的纯化和表面改性方法,着重对碳纳米管/聚合物复合材料的制备方法、微观结构表征及其力学、电学、光学等性能的研究进行了综述;简述了此类复合材料在电学、电磁屏蔽材料及吸波隐身材料、纤维材料以及航天工业等领域的应用,探讨了该研究领域所面临的一些问题及今后的发展方向。 相似文献
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针对催化化学气相法合成的碳纳米管含有金属、金属氧化物和碳杂质, 且缺陷较多进行了非破坏性纯化研究. 基于碳纳米管与碳杂质间结构、性质的微小差异, 1800 ℃使粗制的碳纳米管高温退火3 h, 为避免碳纳米管氧化, 高温退火过程在氩气气氛中完成. 运用扫描电镜、透射电镜观察碳纳米管的形貌和结构, 发现高温退火后, 碳纳米管的端帽大部分被打开. 能谱检测显示, 粗制的碳纳米管中的杂质(Al, Si, Ni, Cu 质量分数w分别为4.67%, 0.27%, 40.12%和1.34%)退火后被除去. 拉曼分析表明, 退火前后石墨D, G峰面积SD, SG分别从1314900降至474921, 767157降至566292, 退火不仅有效地去除了样品中的碳杂质, 而且使碳纳米管的缺陷得到一定程度的修复, 石墨化度随之大大提高. 研究提出了一种简单的、非破坏性的、便于规模化的纯化方法. 相似文献
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碳纳米管修饰电极在分析化学中的应用 总被引:3,自引:0,他引:3
综述了碳纳米管所特有的物理和化学性质,碳纳米管的制备、纯化和修饰,重点介绍了碳纳米管修饰电极及其在分析化学中的一些研究成果.引用文献73篇. 相似文献
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液相化学腐蚀法用于碳纳米管的纯化及顶端开口研究 总被引:10,自引:0,他引:10
液相化学腐蚀法用于碳纳米管的纯化及顶端开口研究余荣清,程大典,詹梦熊,王育煌,郑兰荪(厦门大学化学系361005)碳纳米管作为纳米材料家族中一个新的成员,其潜在的重大应用前景引起了广泛重视。人们在合成制备及理论研究等方面进行了许多有益的探索[1~3]... 相似文献
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碳纳米管具有优秀的导电性能、 透光性能和十分突出的柔性, 在柔性透明导电薄膜中有着良好的应用前景. 如何制备同时拥有良好导电性能和透光性能的碳纳米管薄膜是这一领域研究的核心问题. 本综述介绍了碳纳米管薄膜的制备方法, 并重点讨论了基于漂浮催化剂化学气相沉积法的碳纳米管薄膜的可控制备. 在生长过程中限制碳纳米管的团聚、 增加碳纳米管的长度、 降低杂质的含量是提高碳纳米管薄膜性能的主要策略. 相似文献
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We demonstrate a simple purification method of carbon nanotubes via sulfidation reaction of carbon, C + 2S --> CS2, to selectively remove carbonaceous impurities from nanotubes. The sulfidative purification of carbon nanotubes integrated in field-effect transistors results in a dramatic improvement of switching characteristics due to removal of carbonaceous impurities. 相似文献
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Production of High Purity Multi-Walled Carbon Nanotubes from Catalytic Decomposition of Methane 总被引:1,自引:0,他引:1 下载免费PDF全文
Kong Bee Hong Aidawati Azlin Binti Ismail Mohamed Ezzaham Bin Mohd Mahayuddin Abdul Rahman Mohamed Sharif Hussein Sharif Zein 《天然气化学杂志》2006,15(4):266-270
Acid-based purification process of multi-walled carbon nanotubes (MWNTs) produced via catalytic decomposition of methane with NiO/TiO2 as a catalyst is described. By combining the oxidation in air and the acid refluxes, the impurities, such as amorphous carbon, carbon nanoparticles, and the NiO/TiO2 catalyst, are eliminated. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images confirm the removal of the impurities. The percentage of the carbon nanotubes purity was analyzed using thermal gravimetric analysis (TGA). Using this process, 99.9 wt% purity of MWNTs was obtained. 相似文献
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Musumeci AW Waclawik ER Frost RL 《Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy》2008,71(1):140-142
Raman spectroscopy has been utilized to show the increase of single-walled carbon nanotubes (SWCNTs) content in commercial grade samples synthesized by the chemical vapour deposition (CVD) technique with a minimization of impurities using both hydrochloric acid treatment and surfactant purification. Surfactant purification methods proved to be the most effective, resulting in a three-fold increase in the percentage of SWCNTs present in the purified product as determined by Raman spectroscopy. 相似文献
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Lingchao Cao Yu Wang Dacheng Wei Lei Fu Ping'an Hu Hongliang Zhang Liping Huang Gui Yu 《Acta Physico》2008,24(6):951-954
A simple acid treatment method was applied to remove the catalyst impurities and other residues contaminated in the vertically aligned carbon nanotube arrays. We demonstrated that acid treatment was an efficient approach for aligned carbon nanotube purification. Scanning electron microscopy and X-ray photoelectron spectroscopy were used to characterize the morphology of the aligned carbon nanotube arrays and to determine the efficiency of the purification. Using hydrochloric acid could efficiently eliminate catalyst impurities and retain the original structures of the aligned carbon nanotube arrays. The method provided a simple, economical, and effective way to purify the aligned carbon nanotubes, and it would promote the applications of vertically aligned carbon nanotube arrays in electronic field. 相似文献
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T. Braun H. Rausch L. P. Bíró Z. Konya I. Kiricsi 《Journal of Radioanalytical and Nuclear Chemistry》2004,262(1):31-34
By using instrumental neutron activation analysis (INAA) it has been shown that some pristine carbon SWNT's and MWNT's of
different makes, contain a multitude of trace element impurities at various concentration levels including also amounts which
can be considered as nanoelectronically dopant quantities. The same holds for the above mentioned carbon nanotubes also after
their inadequately so-called purification.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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Ahmad Aqel Kholoud M.M. Abou El-Nour Reda A.A. Ammar Abdulrahman Al-Warthan 《Arabian Journal of Chemistry》2012,5(1):1-23
Since their discovery in 1991 by the Japanese scientist “Sumio Iijima”, carbon nanotubes have been of great interest, both from a fundamental point of view and for future applications. Different types of carbon nanotubes can be produced in various ways. Economically feasible large-scale production and purification techniques are still under development. Carbon nanotubes are discussed in this review in terms of history, types, structure, synthesis and characterisation methods. Carbon nanotubes have attracted the fancy of many scientists worldwide. The unique and unusual properties of these structures make them a unique material with a whole range of promising applications. 相似文献