Carbon Nanotube Fibres-60-80 μm

Catalog	ACMA00030797
Description	Carbon nanotube fibers have moderate to high strengths. Also, they possess good electrical conductivity and very low density. Due to these properties, carbon nanotube fibers can be integrated into fabrics and composites. Their area of usage involves their use as stand-alone or embedded sensors. Moreover, their high strength, stiffness, thermal and electrical conductivity enable their use as functional reinforcements in composite materials, in active heating/cooling systems, electrical conductivity/EMI shielding mechanisms such as CNT/epoxy composites and in atmospheric anti-threat detection in UAVs.
Conductivity	1×10^5~2×10^5 S/m
Feature	Fiber diameter: 60-80 µm, Tensile Strength: 310-500 MPa, Electrical conductivity: 1×10^5~2×10^5 S/m
Fiber Diameter	60-80 µm
Tensile Strength	310-500 Mpa

Case Study

Production Methods and Applications of Carbon Nanotube Fibers

Lu W, et al. Advanced materials, 2012, 24(14), 1805-1833.

Carbon nanotube (CNT) fibers have high specific strength, specific stiffness, and electrical conductivity, and their potential applications in many fields have been widely studied.
· Current methods for producing CNT fibers mainly include: (1) spinning from CNT solutions, (2) spinning from vertically aligned CNT arrays previously grown on a substrate, (3) spinning from CNT aerogels formed in a chemical vapor deposition (CVD) reactor, and (4) twisting/winding CNT films.
· The potential applications of high-performance CNT fibers in many fields such as multifunctional composites, sensing, transmission lines, and electrochemical devices have been explored. For example, Zhu et al. designed a brush electrode based on CNT fibers for electrochemical biosensor applications. The prepared CNT fiber microelectrode showed better sensitivity, detection range, and linearity in detecting glucose than the Pt-Ir coil electrode. Specifically, the steady-state current in response to glucose concentration ranged from 25 μM to 30 mM.
· In addition to being used as electrodes in electrochemical cells, carbon nanotube fibers can also be used to fabricate fiber supercapacitors. For example, Dalton et al. constructed a fiber supercapacitor consisting of two CNT/PVA composite fibers. The capacitance of this fiber supercapacitor (100 mm in diameter) was 5 F/g and the energy storage density was 0.6 Wh/kg at 1 V.

Study on the Interfacial Properties of Carbon Nanotube Fibers in Epoxy Matrix

Zu M, et al. Carbon, 2012, 50(3), 1271-1279.

One of the most promising applications of carbon nanotube (CNT) fibers is as a reinforcement material for multifunctional composites. This work aims to investigate the interfacial properties of CNT fiber/polymer composites. A microdrop test was employed to characterize the interfacial shear strength between CNT fibers and epoxy matrix.
Experimental methods and results
· Microdrop test: The microdrop test involves preparing specimens with aligned glass tubes and CNT fibers glued on top, followed by applying a resin microdroplet on the fibers near the tube ends. After curing the droplet, the fiber is cut to create two specimens, and a cotter pin is attached for suspension. Measurements of the embedded fiber length, fiber diameter, and fiber free length are taken. The test setup includes knives positioned above the droplet, which are used to apply downward force on the droplet, causing the fiber to be pulled in tension. The shear force at the interface is measured by a balance during this process. The test is performed at a displacement rate of 0.003 mm/s, and the force-displacement curve is recorded for analysis.
· The results show that the effective CNT fiber/epoxy interfacial shear strength is 14.4 MPa. Unlike conventional fiber-reinforced composites, interfacial shear sliding occurs at the interface between the resin-infiltrated and non-resin-infiltrated regions in the CNT fibers.