3D printable composites of modified cellulose fibers and conductive polymers and their use in wearable electronics

• DOI: 10.1016/j.apmt.2022.101703
• Publication Date: 2022-12-05T10:16:54Z
• Authors: Karishma Jain; Zhen Wang; Leonardo D. Garma; Emile Engel; Göksu Cinar Ciftci; Cecilia Fager; Per A. Larsson; Lars Wågberg
• Keywords: Nanocellulose; Conductive ink; Printed Electronics

There are many bioelectronic applications where the additive manufacturing of conductive polymers may be use. This method is cheap, versatile and allows fine control over design wearable electronic devices. Nanocellulose has been widely used as a rheology modifier in bio-based inks that to print electrical components However, preparation nanocellulose energy time consuming. In this work an easy-to-prepare, 3D-printable, bio-ink; based on modified cellulose fibers poly(3,4-ethylene dioxythiophene) poly(styrene sulfonate) (PEDOT:PSS), presented. The ink shows excellent printability, printed samples wet stable show electrochemical performance. structures have conductivity 30 S/cm, high tensile strains (>40%), specific capacitances 211 F/g; even though PEDOT:PSS only accounts for 40 wt% total composition. Scanning electron microscopy (SEM), wide-angle X-ray scattering (WAXS), Raman spectroscopy data induce conformational changes phase separation PEDOT:PSS. It also demonstrated supercapacitors biopotential-monitoring devices can prepared using ink.