Spun Carbon Nanotube Fibres and Films as an Alternative to Printed Electronic Components

Current studies of carbon nanotubes have enabled both new electronic applications and improvements to the performance of existing ones. Manufacturing of macroscopic electronic components with this material generally involves the use of printed electronic methods, which must use carbon nanotube (CNT) powders. However, in recent years, it has been shown that the use of ready-made self-standing macroscopic CNT assemblies could have considerable potential in the future development of electronic components. Two examples of these are spun carbon nanotube fibers and CNT films. The following paper considers whether these spun materials may replace printed electronic CNT elements in all applications. To enable the investigation of this question some practical experiments were undertaken. They included the formation of smart textile elements, flexible and transparent components, and structural electronic devices. By taking this approach it has been possible to show that CNT fibres and films are highly versatile materials that may improve the electrical and mechanical performance of many currently produced printed electronic elements. Additionally, the use of these spun materials may enable many new applications and functionalities particularly in the area of e-textiles. However, as with every new technology, it has its limitations, and these are also considered.

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Cellulose Electroactive Paper (EAPap): The Potential for a Novel Electronic Material

MRS Proceedings ◽

10.1557/proc-1129-v05-02 ◽

2008 ◽

Vol 1129 ◽

Cited By ~ 2

Author(s):

Joo-Hyung Kim ◽

Kwangsun Kang ◽

Sungryul Yun ◽

Sangyeul Yang ◽

Min-Hee Lee ◽

...

Keyword(s):

Electronic Material ◽

Mechanical Performance ◽

Electronic Components ◽

Electromechanical Properties ◽

Actuation Mechanism ◽

Mechanical Sensors ◽

Electronic Elements ◽

Stretching Ratio ◽

Cellulose Surface ◽

Quality Metal

AbstractCellulose electro-active paper (EAPap) has attracted much attention as a new smart electronic material to be utilized as mechanical sensors, bio compatible applications and wireless communications. The thin EAPap film has many advantages such as lightweight, flexible, dryness, biodegradable, easy to chemically modify, cheap and abundance. Also EAPap film has a good reversibility for mechanical performance, such as bending movement, under electric field. The main actuation mechanism governed by piezoelectric property can be modulated by material direction and stretching ratio during process. In this paper we present the overview as well as fabrication process of cellulose EAPap as a novel smart material. Also we propose the method to enhance the piezoelectricity, its mechanical and electromechanical properties. In addition, the fabrication of high quality metal patterns with Schottky diode on the cellulose surface is an initiating stage for the integration of the EAPap actuator and electronic components. The integration of flexible actuator and electronic elements has huge potential application including flying magic carpets, microwave driven flying insets and micro-robots and smart wall papers.

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A Review on Electromechanical Devices Fabricated by Additive Manufacturing

Journal of Manufacturing Science and Engineering ◽

10.1115/1.4033758 ◽

2016 ◽

Vol 139 (1) ◽

Cited By ~ 22

Author(s):

John O'Donnell ◽

Myungsun Kim ◽

Hwan-Sik Yoon

Keyword(s):

Additive Manufacturing ◽

Biomedical Engineering ◽

Electronic Devices ◽

Electronic Components ◽

Single Form ◽

Recent Advancement ◽

Potential Applications ◽

Electromechanical Devices ◽

Mechanical Devices ◽

New Applications

Additive manufacturing (AM) for mechanical devices and electronic components has been actively researched recently. While manufacturing of those mechanical and electronic devices has their own merits, combining them into a single form is expected to grow by creating new applications in the future. The so-called all-printed electromechanical devices have potential applications in mechanical, electrical, and biomedical engineering. In this paper, the recent advancement in all-printed electromechanical devices is reviewed. A brief introduction to various AM techniques is presented first. Then, various examples of sensors, electronics, and electromechanical devices created by AM are reviewed.

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Application of Conductive Carbon Nanotube Fibers and Composites: Gas Sensor

10.21236/ada583568 ◽

2013 ◽

Cited By ~ 1

Author(s):

Padraig G. Moloney ◽

Enrique V. Barrera

Keyword(s):

Carbon Nanotube ◽

Gas Sensor ◽

Carbon Nanotube Fibers

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Influence of Carbon Nanotube-Pretreatment on the Properties of Polydimethylsiloxane/Carbon Nanotube-Nanocomposites

Polymers ◽

10.3390/polym13091355 ◽

2021 ◽

Vol 13 (9) ◽

pp. 1355

Author(s):

Astrid Diekmann ◽

Marvin C. V. Omelan ◽

Ulrich Giese

Keyword(s):

Electrical Conductivity ◽

Carbon Nanotube ◽

Mechanical Performance ◽

Softening Effect ◽

Electrical Percolation ◽

Optimum Parameters ◽

Lauryl Ether ◽

Solvent Residues ◽

Electrical Percolation Threshold ◽

Filler Dispersion

Incorporating nanofillers into elastomers leads to composites with an enormous potential regarding their properties. Unfortunately, nanofillers tend to form agglomerates inhibiting adequate filler dispersion. Therefore, different carbon nanotube (CNT) pretreatment methods were analyzed in this study to enhance the filler dispersion in polydimethylsiloxane (PDMS)/CNT-composites. By pre-dispersing CNTs in solvents an increase in electrical conductivity could be observed within the sequence of tetrahydrofuran (THF) > acetone > chloroform. Optimization of the pre-dispersion step results in an AC conductivity of 3.2 × 10−4 S/cm at 1 Hz and 0.5 wt.% of CNTs and the electrical percolation threshold is decreased to 0.1 wt.% of CNTs. Optimum parameters imply the use of an ultrasonic finger for 60 min in THF. However, solvent residues cause a softening effect deteriorating the mechanical performance of these composites. Concerning the pretreatment of CNTs by physical functionalization, the use of surfactants (sodium dodecylbenzenesulfonate (SDBS) and polyoxyethylene lauryl ether (“Brij35”)) leads to no improvement, neither in electrical conductivity nor in mechanical properties. Chemical functionalization enhances the compatibility of PDMS and CNT but damages the carbon nanotubes due to the oxidation process so that the improvement in conductivity and reinforcement is superimposed by the CNT damage even for mild oxidation conditions.

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