With the popularization of smart device applications, the development of wearable medical devices is also in the ascendant. This type of equipment is mainly used for real-time monitoring of the patient's physical condition, so it is required that these equipment have as high flexibility and conductivity as possible.
At present, the application of single-walled carbon nanotube (SWCNT) has covered various types of existing silicone rubber, including liquid silicone rubber, room temperature vulcanized silicone rubber and high temperature vulcanized silicone rubber, which can achieve the requirements from antistatic to electromagnetic interference shielding. Of all conductivity levels.
Conductive particles commonly used in conductive silicone rubber are mainly divided into the following three categories:
(1) Carbon-based materials: mainly include carbon black, graphite, carbon fiber, carbon nanotubes and graphene.
(2) Pure metal particles: gold powder, silver powder, copper powder, nickel powder, aluminum powder, etc.
(3) Composite conductive particles: silver-plated copper, silver-plated nickel, silver-plated aluminum, nickel-plated graphite, silver-plated glass beads, etc.
These conductive particles have the characteristics of good conductivity, easy filling, easy dispersion, aging resistance, and moderate cost. If necessary, these conductive particles can be further surface treated. Different conductive particles and different filling amounts have different conductive properties of the prepared conductive silicone rubber. Therefore, which conductive particles should be selected should be determined according to the conductive performance to be achieved, or more than two kinds of conductive particles can be used in combination.
According to the news, a research team headed by Zeon Nano Technology Co., Ltd. of Japan has successfully developed a high-softness and high-conductivity medical silicone rubber composite material added with monolayer carbon nanotubes (CNT). The material is planned to be used in wearable devices and medical equipment.
Carbon nanotubes added with a new type of silica gel composite material
The company's own single-walled carbon nanotube (SWCNT)-ZEONANOSG101 is added to the material, and the addition amount of carbon nanotubes is about 1 to 5% of the filler weight. It is highly dispersed in the silicone rubber matrix material used to make this new type of material. Due to the high degree of fusion of carbon nanotube materials, the material not only has a high degree of softness and a high degree of fit to human skin, but also can effectively reduce the impedance between the electrode and the skin, thereby effectively improving the input of the electrode signal to the skin. Efficiency, thereby further improving the accuracy of related medical monitoring. Experiments have proved that the product has higher durability than similar products on the market.