Chopping Carbon Nanotube Yarn with an Axe

Some time ago, we uploaded a video showing how well a sample of our carbon nanotube film was able to hold up to an impact from a blade. In this video, we take things a step further by trying to cut some of our carbon nanotube yarn with an axe!

Spoiler warning: it survives better than that piece of wood does.

Wearable Electronics: Carbon Nanotube Yarn + LEDs

This is the follow-up to our previous video, in which we demonstrated how our carbon nanotube yarn could be stitched into fabric using a conventional sewing machine. Here we are showing off the finished product: a DexMat t-shirt with blinking LEDs embedded into our lightning bolt logo!

We used an Arduino Gemma and a small battery pack (sewn into a pouch near the hem of the shirt) to create this LED effect. The electrical connections between the Arduino and the LEDs consist of 4 lengths of our high strength 130 micron carbon nanotube yarn. As Tyson demonstrates, this yarn can easily bend and fold with the shirt, and the zig-zag stitch allows it to stretch as well. It’s also extremely light and comfortable!

Check out the first part of this project here.

DexMat Carbon Nanotube Yarn + Sewing Machine

Here we show the first part of the process of making a simple wearable electronic display in a t-shirt using our carbon nanotube yarn. We use a standard sewing machine to stitch several long filaments of our yarn into the shirt; we plan to eventually connect these to a battery, an Arduino, and some LEDs.

The CNT yarn is strong enough and flexible enough to be run through the sewing machine without being damaged, but it is somewhat less flexible, and much less stretchable, than cotton yarn; as a result we did have some trouble, as you can see in this video. In the end, the carbon nanotube yarn worked well when it was fed from the bottom bobbin. It worked well when fed from the top bobbin and stitched into thick fabric, but not so well with the more elastic t-shirt fabric.

Complications aside, this video demonstrates the potential of our carbon nanotube fibers and yarns for use in e-textiles. It is possible that with more time and knowledge we may have been able to troubleshoot the problem…if you are a wearable electronics maker, why not get some of our yarn and see if you are able to make it work? 🙂

Update: check out our video of the completed shirt here!

Carbon Nanotube Yoyo

We are still working on the sewing machine video that we promised last week, but in the meantime, we wanted to put together a fun demonstration of the flexibility of our carbon nanotube yarn. Here we have replaced the cotton string on a yoyo with a length of our carbon nanotube yarn. The yarn is flexible enough for the yoyo to work perfectly, and as you can see it is strong enough for Dmitri to perform a few tricks.

High strength 130 micron CNT yarn spotlight

In this video we focus on one of our newly available products, a higher strength version of our 130 micron diameter carbon nanotube yarn.

DexMat at Interwire 2019

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!

CNT Film Impact Test

In this video we perform an “amateur” impact test on a sample of our carbon nanotube film by striking a razor blade into it with a hammer. The CNT film is compressed, but not torn or damaged.

Failure Current of DexMat CNT Yarn

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.

New High Strength Yarn Product Release

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.

New Carbon Nanotube Film Product Release

In this video we introduce 10 micron thick film to the catalog of DexMat film products and show how the film can be easily processed on standard winding equipment. CNT films have tremendous potential in applications ranging from EMI shielding in cables/electronics, to thermal interface materials, to heating elements or conductive materials in clothing or e-textiles. High conductivity, high strength, 10 micron thick film is now available for purchase at the DexMat online store!