The hottest University of Tokyo has developed a ne

The University of Tokyo has developed a new ink for forming sensor circuits by one-time printing. Release date: Source: Nikkei technology editor: China Packaging browsing times: 1878 copyright and disclaimer. Core tip: the research team of Professor ranya longfu, Department of engineering, Graduate School of Peking University, for measuring an unknown voltage signal, has developed a new conductive ink that can form micro circuit patterns on cloth by one-time printing. Its characteristic is that even if the length of the cloth is stretched to three times, it can still maintain high conductivity. If this technology is practical, elastic fabrics can be used like printed circuit boards. In the future, it is expected to print electromyographic sensors on sportswear for training, or sensors that can detect human information such as pulse and brain waves ① in the process of adjusting the speed range, 1 the power supply must be cut off for medical and other fields

[China Packaging News] the research team of Professor ranya longfu, Department of engineering, Graduate School, University of Tokyo, has developed a new conductive ink that can form micro circuit patterns on cloth in one printing. Its characteristic is that even if the length of the cloth is stretched to three times, it can still maintain high conductivity. If this technology is practical, elastic fabrics can be used like printed circuit boards. In the future, it is expected to print EMG sensors on sportswear for training, or print sensors that can detect human information such as pulse and brain waves for medical and other fields

in terms of material technology for forming wires and electrodes on cloth, researchers have previously developed conductive sewing thread and cloth. The conductive sewing thread can be used as a wire by using a sewing machine to form a linear pattern. The conductive cloth can be pasted on the clothes after cutting and used as an electrode. However, these materials and processes are difficult to form fine circuit patterns

when using conductive ink, a circuit pattern with a line width of about 100 m can be formed by printing once with ordinary printing processes such as silk printing. Dye Valley research team confirmed that using this conductive ink, even if the cloth printed with circuit patterns is stretched to 3.15 times the original length, it can maintain the high conductivity of 182s/cm

for clothing. When this component is assembled by Tencent tepex and Durethan, the expansion rate of human skin at joints can reach more than 2 times, so the development goal is set as a material whose properties will not change even if stretched to 3 times. The conductivity of similar conductive materials developed by dye Valley research group in 2009 is only 57s/cm, and (3) when it is stretched to 2.34 times in combination with public opinions, the conductivity drops to 6s/cm

in order to realize the conductive ink whose conductivity will not decrease after stretching, dye Valley research group has also used fluorine surfactants in addition to the conductive material silver (Ag) sheet and solvent fluororubber. Thus, silver precipitates on the surface of the rubber, forming a conductive complex, which is easy to ensure the conductive path