Carbon Nanotube Fibers-5-12 µm

Catalog	ACMA00030795
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	5×10^4~7×10^4 S/m
Feature	Fiber Diameter: 5-12 µm, Tensile Strength 1200-1500 MPa, Electrical conductivity 5×10^4~7×10^4 S/m
Fiber Diameter	5-12 µm
Tensile Strength	1200-1500 Mpa

Case Study

Preparation of Stretchable Conductors Based on Carbon Nanotube Fibers

Zu M, et al. Advanced Functional Materials, 2013, 23(7), 789-793.

Stretchable conductors based on carbon nanotube (CNT) fibers (diameter ≈13μm) were fabricated by a simple pre-strain-then-buckling method. The experimental results show that at pre-strain levels up to 40%, the resistance of the CNT fiber/PDMS composite film changes very little (≈1%) under multiple stretching and releasing cycles, indicating excellent stability and repeatability as a stretchable conductor.
Preparation of CNT fiber/PDMS composites
· Five carbon nanotube (CNT) fibers (60 mm in length) were initially arranged in parallel with their ends secured to two tape strips. The distance between adjacent fibers was maintained at approximately 1.5 mm.
· Subsequently, the aligned fibers were immersed in a degassed bath of polydimethylsiloxane (PDMS). Following a 30-second immersion at room temperature, the fibers, now coated with a thin layer of PDMS, were transferred to a pre-stretched PDMS substrate with a length of L+ΔL.
· The entire assembly was then cured in an oven at 100°C for 1 hour. Upon release of the prestrain in the PDMS substrate, the fibers underwent compression, leading to the formation of kinked patterns.Thin copper strips, applied using silver paint, were affixed to the two ends of the kinked fibers to serve as electrodes.
· Finally, a thin layer of uncured PDMS was poured on top to encase the device, and the specimen was subjected to a second curing process in the oven at 100°C for 1 hour to solidify the top PDMS layer.