DexMat is at the Interwire 2019 expo in Atlanta, GA, to talk about our carbon nanotube yarns and films. If you are in the area from May 14 – May 16, come by booth 154 and say hello!
In this video we demonstrate the amount of electric current that our 500 micron diameter CNT yarn can sustain in air, and compare this to a copper wire measured with the same apparatus and environment. Here are the precise properties of the materials used in these tests:
The CNT yarn has an average diameter of 500 microns, a linear mass of 0.18 mg/m, and a linear resistance of 1.3 Ohms/m.
The copper wire is a 36 gauge wire with a diameter of 127 microns, a linear mass of 0.26 mg/m, and a linear resistance of 0.59 Ohms/m.
Note that the voltage measurements shown on the power supply display represent the voltage drop through the entire circuit, not only across the sample being measured.
In this video we introduce a high strength grade of 200 micron diameter CNT yarn to the catalog of DexMat yarn products! The high strength yarn has a breaking force of well over 3 kg and is about 50 % stronger than its predecessor. The tensile strength of this yarn is 1 GPa, and it is also very lightweight and highly flexible. Our high strength yarn is now available for purchase at the DexMat online store.
Here we show off the difference between Pi grams of copper wire and Pi grams of our carbon nanotube yarn.
Full disclosure: some of the difference in length here is due to the carbon nanotube yarn being thinner. The copper wire in this video is 1.2 mm in diameter; the carbon nanotube yarn ranged from 0.7 mm to 1 mm in diameter. The length difference is so extreme, however, because of the difference in density between the two materials, which is close to a factor of 9.
Happy Pi Day!
We have talked with many people who are curious about using our carbon nanotube yarn in their projects or products, so we wanted to show off a very simple DIY project of our own. For a limited time this month (March 2019) we are having a sale on our 200 micron diameter carbon nanotube yarn, so now is an ideal time to get some! We would love to hear feedback from anyone who has tried out our materials – let us know what you are doing with them, and how they work for you!
In this video we provide a brief look at some of the experimental work we are doing to develop new products at DexMat. Here, we are using an electroplating process to coat our carbon nanotube yarn with a layer of copper. This process may allow us to create a useful hybrid material, combining the conductivity of metallic copper with the strength and durability of our lightweight carbon nanotube yarn.
In this video, we demonstrate the process that we use for braiding carbon nanotube fibers to make EMI shielding braids or braided CNT yarns. These braids are lightweight and highly flexible. They are also more conductive than stainless steel fiber braids and much stronger than copper wire.
A demonstration of the methods & tools we typically use to measure the electrical resistance of our carbon nanotube yarns & tapes.
This video shows how carbon nanotube (CNT) fibers can be assembled into yarns or ropes by plying the fibers together with a planetary ropemaking machine. These yarns are lightweight and highly flexible. They are also more conductive than stainless steel thread and much stronger than copper wire.
This video highlights the high temperature stability of CNT yarns compared to stainless steel thread by applying a 1430 C butane torch to both materials. The stainless steel thread barely lasts 1 second before melting, while the CNT yarn survives the torch for more than 30 seconds without any visible damage. The high thermal stability and superior thermal conductivity of the CNT material is most likely the reason that it is able to survive exposure to the flame from the torch. The impressive thermal properties of CNT fibers and films make them highly promising for application in flame retardant materials such as those used in firefighter suits.