scholarly journals Fabrication of Microscale Carbon Nanotube Fibers

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Gengzhi Sun ◽  
Yani Zhang ◽  
Lianxi Zheng
Keyword(s):  
Carbon Nanotubes ◽  
Liquid Crystal ◽  
High Performance ◽  
Recent Progress ◽  
Practical Applications ◽  
Fiber Properties ◽  
Solution Spinning ◽  
Cnt Arrays ◽  
Individual Cnts ◽  
Carbon Nanotube Fibers

Carbon nanotubes (CNTs) have excellent mechanical, chemical, and electronic properties, but realizing these excellences in practical applications needs to assemble individual CNTs into larger-scale products. Recently, CNT fibers demonstrate the potential of retaining CNT's superior properties at macroscale level. High-performance CNT fibers have been widely obtained by several fabrication approaches. Here in this paper, we review several key spinning techniques including surfactant-based coagulation spinning, liquid-crystal-based solution spinning, spinning from vertical-aligned CNT arrays, and spinning from CNT aerogel. The method, principle, limitations, and recent progress of each technique have been addressed, and the fiber properties and their dependences on spinning parameters are also discussed.

scholarly journals Graphene-based Membranes for H2 Separation: Recent Progress and Future Perspective

Membranes ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 336
Author(s):  
Chong Yang Chuah ◽  
Jaewon Lee ◽  
Tae-Hyun Bae
Keyword(s):  
High Performance ◽  
Recent Progress ◽  
H2 Production ◽  
Future Perspective ◽  
Separation Processes ◽  
Small Plant ◽  
Practical Applications ◽  
Carbon Dioxide Co2 ◽  
Separation Performances ◽  
Emission Of Greenhouse Gases

Hydrogen (H2) is an industrial gas that has showcased its importance in several well-known processes such as ammonia, methanol and steel productions, as well as in petrochemical industries. Besides, there is a growing interest in H2 production and purification owing to the global efforts to minimize the emission of greenhouse gases. Nevertheless, H2 which is produced synthetically is expected to contain other impurities and unreacted substituents (e.g., carbon dioxide, CO2; nitrogen, N2 and methane, CH4), such that subsequent purification steps are typically required for practical applications. In this context, membrane-based separation has attracted a vast amount of interest due to its desirable advantages over conventional separation processes, such as the ease of operation, low energy consumption and small plant footprint. Efforts have also been made for the development of high-performance membranes that can overcome the limitations of conventional polymer membranes. In particular, the studies on graphene-based membranes have been actively conducted most recently, showcasing outstanding H2-separation performances. This review focuses on the recent progress and potential challenges in graphene-based membranes for H2 purification.

scholarly journals Carbon nanotubes for flexible batteries: recent progress and future perspective

2020 ◽  
Author(s):  
Sheng Zhu ◽  
Jiang Sheng ◽  
Yuan Chen ◽  
Jiangfeng Ni ◽  
Yan Li
Keyword(s):  
Carbon Nanotubes ◽  
Recent Progress ◽  
Building Blocks ◽  
Future Perspective ◽  
Future Research ◽  
Wearable Electronics ◽  
Practical Applications ◽  
Mechanical And Electrical Properties ◽  
Mechanical Deformations ◽  
Potential Applications

Abstract Flexible batteries, which maintain their functions potently under various mechanical deformations, attract increasing interests due to the potential applications in emerging portable and wearable electronics. Significant efforts have been devoted to material synthesis and structural designs to realize the mechanical flexibility of various batteries. Carbon nanotubes (CNTs) have a unique one-dimensional (1D) nanostructure and are convenient to further assemble into diverse macroscopic structures, such as 1D fibers, 2D films, and 3D sponges/aerogels. Due to their outstanding mechanical and electrical properties, CNTs and CNT-based hybrid materials are superior building blocks for different components in flexible batteries. This review summarizes recent progress on the application of CNTs in developing flexible batteries, from closed-system to open-system batteries, with a focus on different structural designs of CNT-based material systems and their roles in various batteries. We also provide perspectives on the challenges and future research directions for realizing practical applications of CNT-based flexible batteries.

scholarly journals Fabrication and Properties of Macroscopic Carbon Nanotube Assemblies Transforming from Aligned Nanotubes

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Y. N. Zhang ◽  
G. Z. Sun ◽  
L. X. Zheng
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Radial Direction ◽  
Nanometer Scale ◽  
Intrinsic Properties ◽  
Aligned Carbon Nanotubes ◽  
Cnt Arrays ◽  
Individual Cnts ◽  
Time Ease

Macroscale assemblies of well-aligned carbon nanotubes (CNTs) can inherit intrinsic properties from individual CNTs and at the same time ease handling difficulties that occur at nanometer scale when dealing with individual CNTs. Herein, simple fabrication processes are introduced to produce a variety of macroscale CNT assemblies, including well-aligned CNT bundles, CNT films, and CNT fibers, from the same starting material: spinnable CNT arrays. The electrical and mechanical properties of the as-prepared CNT assemblies have been investigated and compared. It is found that CNT films show an electrical conductivity of 145~250 S cm−1which is comparable to CNT fibers, but two orders magnitude higher than that of conventional Bucky paper. CNT fibers exhibit diameter dependent tensile strength which is mainly attributed to the nonuniform twisting along the radial direction of fibers.

Large-scale production of carbon nanotubes and their applications

2006 ◽  
Vol 78 (9) ◽  
pp. 1703-1713 ◽  
Author(s):  
Morinobu Endo ◽  
Takuya Hayashi ◽  
Yoong-Ahm Kim
Keyword(s):  
Carbon Nanotubes ◽  
Medical Devices ◽  
Graphene Layer ◽  
Large Scale ◽  
Recent Progress ◽  
Scale Production ◽  
Practical Applications ◽  
Electrochemical Systems ◽  
Large Scale Production ◽  
Near Future

Carbon nanotubes consisting of a rolled graphene layer built from sp2 units have attracted the imagination of scientists as 1D macromolecules. Here, we will describe the recent progress on selective synthesis of various carbon nanotubes through the judicious control of synthetic conditions and their practical applications of these carbon nanotubes in the fields of electrochemical systems, nanocomposites, and medical devices. It is envisaged that carbon nanotubes will play an important role in the development of nanotechnology in the near future.

scholarly journals Carbon nanotubes for ultrafast fibre lasers

Nanophotonics ◽  
2017 ◽  
Vol 6 (1) ◽  
pp. 1-30 ◽  
Author(s):  
Maria Chernysheva ◽  
Aleksey Rozhin ◽  
Yuri Fedotov ◽  
Chengbo Mou ◽  
Raz Arif ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
High Performance ◽  
Recent Progress ◽  
State Of The Art ◽  
Photonic Devices ◽  
Fibre Laser ◽  
Fibre Lasers ◽  
Fibre Optics ◽  
Design Concepts ◽  
Saturable Absorbers

AbstractCarbon nanotubes (CNTs) possess both remarkable optical properties and high potential for integration in various photonic devices. We overview, here, recent progress in CNT applications in fibre optics putting particular emphasis on fibre lasers. We discuss fabrication and characterisation of different CNTs, development of CNT-based saturable absorbers (CNT-SA), their integration and operation in fibre laser cavities putting emphasis on state-of-the-art fibre lasers, mode locked using CNT-SA. We discuss new design concepts of high-performance ultrafast operation fibre lasers covering ytterbium (Yb), bismuth (Bi), erbium (Er), thulium (Tm) and holmium (Ho)-doped fibre lasers.

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