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 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!
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.
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.
Source: Original article appears in the December 2018 issue of the Wire Journal International.
The feature on DexMat is on pages 48-50.
In this video we explain how DexMat’s carbon nanotube (CNT) tape has been used to replace the two EMI copper shielding braids typically used in RG316 cables. The performance of DexMat prototypes matches standard RG316 performance, while reducing the total weight of the cable by 50%!
The shielding effectiveness and insertion loss results for the CNT and Cu shielded cables are shown below. The CNT tape shielded cables have the following advantages:
- Overall RG-316 cable weight reduction of CNT shielded vs. Cu double braid shielded cable without connectors is over 50%
- CNT tape shield is 100 microns thick compared to 500 micron thick Cu double braid shield
- Easy to apply CNT tape to coaxial as well as twisted pair type cables
- Wide range of CNT tape widths and lengths are available for purchase
- CNT tape shielded cables survive at least 1000 flex cycles with a minimum bend radius of at least 7.5X the jacketed cable diameter
Specification Sheet: DexMat fiber, tape, and cable specs Dec-2018
November 28, 2018. Out of the original 17 semi-finalists, DexMat was selected as one of 5 finalists to pitch at the 2018 SpaceCom Entrepreneur Summit in Houston, TX, for the opportunity to win the $100,000 Entrepreneur Challenge. As a runner-up, DexMat won $20,000 in Google Cloud Credits.