Graphene coated textile with electrical and antibacterial properties
authors Daniela Rodrigues, Ana Neves, Isabel Schrijver, Monicacracium, Catarina Moreirinha, Adelaide Almeida, Helena Alves
nationality International
abstract The development of electronic textiles is one of the hottest topics in organic electronics. There are already examples of smart textiles in garments for monitoring physiologic and biomechanical signals. However, manufacturing schemes for current applications rely on the integration of off-the-shelf electronic components mounted on a textile substrate. Such components are silicon-based, thus unsuitable for applications where flexibility and fault-tolerance are required. Organic electronics is an alternative to conventional silicon technology and can overcome these limitations. In this sense, graphene, with high optical transparency and electrical conductivity, is a promising material to be used as electrode. Graphene has also emerged as a novel green broad-spectrum antibacterial material, with little bacterial resistance. Furthermore, due to good biocompatibility, graphene-based nanocomposites with antibacterial properties have a wide range of applications, such as antibacterial packaging, wound dressing or water disinfection. We recently developed an approach consisted in coating specially designed polypropylene and polylactide fibers with graphene and demonstrated that transparent monolayer graphene can coat textile fibers by wet transfer, forming a highly conductive thread with negligible change in transparency [1]. A graphene solution was also developed, based on ultrasonic exfoliation of graphite, which allowed textile coating by other solution methods such as drop cast and dip coating. Conductance of textile coated with graphene solution is lower than CVD graphene, yet it can be substantial improved by doping. Finally, antibacterial activity against Gram-negative bacteria of textile with graphene and doped graphene has been evaluated. Particularly, graphene solution and graphene doped with HNO3 and H2O2 alone and on textile exhibit antibacterial properties. On the contrary, graphene CVD and graphene doped with CsF, Cs2CO3 and CsF: Cs2CO3, alone and on textile, showed poor activity against bacteria, demonstrating graphene tunable antibacterial properties.