Wearable electronic devices has become the focus areas, such as health monitoring, motion detection and other equipment are well into people\’s lives. The new generation of electronic textile wearable device, however, the conventional wearable electronic conductive yarn fabrics typically require the preparation of complex and time consuming and the use of weaving, embroidery technology, the trend is mainly by coating or printing to achieve integration. Electronic textile based on the price of expensive metals, are often toxic and not biodegradable, while their high processing temperatures limits the choice of fabric material. Graphene has excellent electrical, mechanical and other properties, it can be prepared electronic textile substituted metal. Reduced graphene oxide (RGO) between surface functional groups of the fabric there bonding interactions, covalent bonding, etc., the fabric has a good adhesion, but because the reduction process resulting in crystal structure defects, poor conductivity of RGO , which limits its application. Thus, the development of large scale production, graphene-based wearable electronic textile is still very difficult and high conductivity washable. Recently, University of Manchester, Nazmul Karim et who reported a highly conductive, machine washable graphene-based wearable electronic fabric [ 123]. The researchers used scale padding graphene dispersion was applied to the fabric, can produce 150 meters of conductive fabric within 1 minute, followed by rolling and packaging, to achieve the lowest current reported electronic textile sheet resistance ( ≈11.92 Ω / sq), and the fabric after washing 10 machine still has a high conductivity, which does not affect the bending machine wash, compression deformation responsive, while expanding the skin applied to the super capacitor and the strain sensor. Work related to \”Highly Conductive, Scalable, and Machine Washable Graphene-Based E-Textiles for Multifunctional Wearable Electronic Applications\” in the title, recently published \” Advanced Functional Materials \” on.
[explain] Photo Researchers Firstly scale microfluidic law out of the concentrated release graphene dispersed in water, followed by padding process using graphene dispersion is applied to the fabric, may be very high speed (≈150m / min ) to produce a graphene based electronic textile. With the increasing number of coating the fabric sheet resistance will be gradually reduced, the sheet resistance of the coating 5 remains substantially unchanged, suitable curing temperature and curing time can be reduced sheet resistance of the fabric, but too high temperature will result fibrous structure and melting and increasing the sheet resistance disappears. Subsequent rolling process can reduce the distance between the graphene on the fabric, thereby further reducing the sheet resistance of the fabric can be reduced to ≈11.92 Ω / sq, which is the lowest resistance current report electronic textile can be achieved.
Summary Researchers use scale padding, roll pressing and packaging wearable high conductivity and electronic textile machine washable based process for preparing a graphene achieve the lowest current electronic textile sheet resistance, repeated washing machine will not affect the high conductivity of the fabric, it may be applied to the wearable sensor and many other fields such as super capacitors, this work will help to develop the next generation of multi-functional graphene-based electronic wearable fabric. Related links: https: //onlinelibrary.wiley.com/doi/10.1002/adfm.202000293